Referring to the math classes I thought I would never use, my very first thought when you said that was going to be using it here today was "I bet you're not". Because for me, that was Algebra lol. I worked for 25 years as a CNC programmer and machinist, and I never used Algebra one time after high school. But this was a great video that really breaks things down. Good job, and thanks for sharing!
To determine the pitch of any spur gear use the following formula: P = (T+2)/D P = Pitch, T = number of teeth in gear and D = the measured outside diameter of the gear. The resulting calculation will give you a whole number with a decimal. Disregard the decimal value on the end. The whole number is the pitch of the gear. Example: I have a pinion gear with 18 teeth. The measured diameter with a pair of calipers yields 0.415 inch. Using the above formula, P = (T+2)/D = (18+2)/.415 = 48.193, the pitch of the gear is 48 I hope that helps. Joe
They are all relations. For the larger gear to turn once, for example, how many times will the smaller gear have to turn. So for your first example, 7.35... The pinion gear will turn 7 full rotations and .35 of an 8th rotation. In this same time the spur gear will turn a total of one time. Hence 7.35(rotations):1(rotation)
As a general rule of thumb when you increase the RPMs of the motor you decrease the size of the pinion. So if you have a 13T motor you would gear it with a smaller pinion than say a 17T motor.
The lower the ratio will yield the faster top-speed but lower acceleration. The 32T pinion will give you more top speed. Cogging is caused by a number of reasons but the biggest is the motor/ESC themselves. The more you load a sensorless motor, however, can magnify that problem.
The FDR (Final Drive Ratio) of the Rustler transmission is 2.72:1. So for that transmission you would divide your spur gear tooth count by the pinion gear tooth count and multiply that by 2.72 to get your overall gear ratio. So for wha you have now, 32 / 32 x 2.72= 2.72 for your gear ratio.
@fieryguns Absolutely! Many people have learned on the Super Cub! And it's gotten even better in recent years with a battery upgrade to LiPo and a transmitter/receiver upgrade to Spektrum DSM2 radio gear. You may also want to check out the new HobbyZone Stratos as well.
Sounds like your setscrew on the pinion gear backed off is all. Check and see if you can move the gear on the output shaft of the motor. If it moves you just need to tighten the little screw down. If that isn't it I would check to make sure the slipper clutch is tight.
There is only one spur gear for ECX, 87T. I would drop a few teeth on the pinion from stock, 2-3 would be a good starting place. If your gear mesh and slipper are properly set there should be no reason the gears get stripped just by changing motors.
@fieryguns It's pretty robust. Plus it's made out of Z-Foam which can be re-glued with any sort of CA, it doesn't need to be the foam-safe variety. If you happen to brake something there's also a full line of replacement parts for both planes.
With the M05 you have an interesting challenge due to the fixed nature of the motor mounting system. For a brushless I am assuming you're running a 17.5? I think most people are running the largest pinion you can fit in there, so a 5.8:1. The fact that it is front vs rear wheel drive won't affect anything.
@charles1matt Yes, if you're overgeared (too large of a pinion or too small of a spur gear) the motor will overheat. If that's the case just start taking teeth off of the pinion 1-2 at a time until you hit an acceptable temperature.
Verry instructive video. I still have a question. If I want to go "in between", so more top speed and more acceleration. Is it possible using a spur gear with more teeth and a clutch bell with less teeth...??
This is awesome for a new person to hobby, now because of you I now know what type of pinion I'll ever need just by looking, and also taking into account the application I'll be using💎💎💎💎❤️👊🏿
On the RC8B2 yes, that would be good. On the Rascal are you converting that to brushless? If so I believe the spur gear is also Mod 1 so a 14-17T pinion should get you in the range there.
Horizon Hobbies I have the Kyosho Inferno Gt 2 Demon. I’m running stock 4s 100c 9000 man battery. It comes with a 17T pinion but I bought a 20T pinion. Is that good? Will it put too much torque on the motor?
So on a slash racing oval track with 45 ft straights go with 90 20 or 86 18? both are similar ratio but different rotating mass. u said bigger spur more effecient? thanks great video!
Bigger gears always provide more of a "flywheel" effect, which is typically beneficial in most circumstances. Bigger gears are also easier to "mesh" together.
Horizon Hobby. Thanks for the fast reply! I have been researching this for a week or so after a friend of mine said I should drop from 90 to 86 spur. I have read alot and seems people but heads on this issue, because of the larger pinion size causing weight and stress on motor? I am gonna try going back to 90 like u said see how temps run. thanks again for the in depth video!
I can't post links on UA-cam but I believe that TRA1951 is the part number you're looking for. If you check on our website you can see a photo to compare.
It's not a horrible idea but I don't know how necessary I'd consider it. I have never used a metal gear diff with brushless in any of my race vehicles.
Define "Really Hot". 150-170 is about where you should expect things. Also what motor are you using, how much timing in the endbell and is there any timing or boost in the ESC?
Thanks for the info I'm new to RC and bought a Losi Muggy and for now it's a little to fast for me so I'm trying to slow it down a little bit until I get use to it not to mention I'm hoping to get more torque for wheelies
hi mate thnks for video bt i would like to hv ur own advise abt my gearing..am converting a 1/5 scale harm to electric..am a bite out of fund due to expenses on esc,lipo n motor..i have the 730 kv and the 200 esc both trunigy trackstar..as my harm was petrol i was thinkin to keep my stock gearing which is 23 teeth pinion gear and 40 t spur gear.pinion gear r not so cheap and was thinking if these two pinion will be ok to use with this esc n motor,,what should i expect??top speed or acceleration?will it be safe aswell to use without overheating anythng or any other issue?if nt suitable what pinion gear do u reccomend?thnks
I want to upgrade my Stock Serpent S411 for pure parking lot top speed short to mid run time application. What Spur/Pinion combo would you recommend include pitch also please consider the belt drive gearing when responding. Would love to know your take on Motor, ESC, and battery recommendation to achieve all of this. Money no object. Looking forward to your reply. Thanks in advance !!!
8 years ago! Not sure if you still work there, but can you elaborate more on the last bit? How is it that the wheel size impacts the gearing? If I gear up (larger pinion), should I be dropping the size of my wheels at the same time?
Hi, I have a pretty old Losi XXX-t and I have mot seen any videos or pitures about the truck. I have only seen one other person who has had this particular truck. It is the XXX-T 1/10 scale competition rc truck kit. Now for the problem, I have net been able to find a good gearing guide besides this one but I am still confused. I have a castle sidewinder 3 5700kv setup. My friend built the truck for me way back when and I have just recently done a diff rebuild. That is besides the point though. My spur gear seems to be eating off my gear box! I have the original gear box and the original spur gear. The gear was brand new when I ran it. After 10 minutes of play the gear was basically gone! The gear mesh was correct. I know that the issue is either the gear or the motor plate but I don't know which and I don't want to go out spending money right and left. Any suggestions? If you need more information, just let me know :)
I have an ECX Torment 2wd and I just put a 9T brushed motor in it but I want to achieve more speed, so am I able to go up a gear for tooth or keep my stock ones? I use my ECX as like a Short course truck so I run it on grass and sand.
what spur and pinion size should I run on the 22 sct for indoor dirt track I'm running a 86 and a 18 and it seems kinda slow I have the losi 13.5t motor?
So I am new to the hobby and I'm building different vehicles. How do I find out the maximum gear ratio for any particular motor? How do I find out how low and how high I can go on pinion and spur gears?
what would u suggest on kraton 6s with max 6 1650kv and a lrager than the stock tire? what gearing should i use so it wont hurt the motor or wont over heat? ...use it for bashing also...thanks
hi. im running a 14t pinion / 48t spur gear right now. if i want more torque or power on my low end i can change my spur gear to 46 or 47? im running a truggy on a very short course or small scale track. thanks. cheers!
Great video! makes me think, i'm updating my maverick strada xb evo to brushless, its a 1/10 scale 4wd, so if I am aiming to get speeds at around 45mph, i just need to look at a higher KV motor esc combo and thats it? Or playing with gears is a must? Seems like leaving the stock gears is the safest option to prevent motor and ESC from overheating?
I have an ECX Torment and I want to change out the drive shafts. My question is there any metal driveshafts out their I can use to swap out the plastic drive shafts on the Torment.
how much do gear modules (48DP, 64DP, etc.) matter? i may have ordered a wrong module pinion. how much will this affect it? (the gear fits, but i dunno)
If I current have a 83 spur & 18 pinion on my Slash 2WD, what combination/change would be in my best interest to gain more speed on a small asphalt oval track? Thank you! 🤘🏻
20-24t it's really in your best interest to but a 5 piece set starting with 20 and up and test to see what you like best, the Drag Slash comes with a 22t and 29t, I would say 20-22t to avoid heat problems.
what's a gd pinion to run with a 47t spur, I'm currently running a 21t pinion but the motor&esc gets very hot then the truggy will shut dwn do to overheating motor-1950kv 6 pole tire-3.8
I have a new 12turn motor cominng for my vaterra awd mustang it cones with a 77 tooth spur should i use the 19tooth or 22 tooth i just want it to have a decent too speed and acceleration all together but mainly focusing on just hauling around sliding and drifting
i have an sakura d4 awd 1/10 i have a 4400 kv motor and i need to but a pinion gear to put onto the motor drife shaft but i dont know which one to buy. also the big gear is a 92t do i need a better one than that also?
I notice that there are multiple ways to get near the same FDR ie 104spur/52pinion = 3.800 fdr and so does 92spur/46pinion in my touring car how does that effect torque / acceleration? Or is 3.800 fdr just a 3.800 fdr no matter combination of spur/pinion?
While the FDR would be the same there are benefits and disadvantages to getting there with larger or smaller gears. Smaller gears have less rotating mass, therefore will spool up faster and yield better acceleration. However a larger gear will actually be more efficient at transferring power and, due to the slightly heavier rotating mass, have a bit of a flywheel effect which may increase corner speed when coasting.
I have a Traxxas Slash 2wd with stock tires and transmission and right now I have an 86 tooth spur and a 23 tooth pinion which equals a ratio of 3.74 and my transmission ratio is 2.72 which equals a final ratio of 10.17. Now if I were to keep the same spur and use a 32 tooth pinion I would get a final ratio of 7.32. With that ratio would I have higher speed or faster acceleration? I am also using a Traxxas velineon system with an 8.4v 3000mah nimh battery, so would that gearing cause cogging?
I don't think many RCs (if any) have automatic transmissions. Most are only 1-speed, if its 2-speed and up then its probably a manually switching drivetrain.
I-Know-My-Username-Is-Really-Long-But-I-Dont-Care-Because-Your-Opinion-Isnt-Worth-Jizz Actually most RC vehicles use a Centrifugal clutch to shift gears. Once the RPM of the gear hits a certain point the gears shift. This is how 1/8-scale nitro on-road cars and many nitro monster trucks shift.
In my 1/10 brushless truggy with 31 teeth pinion (25 stock) when it accelerates from standing position, i detect some hesitation like its going to switch gear up! The same symptoms goes even worst when i change the pinion gear, with bigger one. Im using 3s Lipo with 150Ah esc but the motor is stock (2400kv).
How does this all translate to rpms? 76/33=2.30, transmission is 3.0*2.30=6.9fdr 3600*7.4=26640rpm/2.30= 11582rpms set to the transmission. Would you divide the rpm by the FDR or the spur/pinion ratio? So 11582rpms*3.0 transmission=34746rpms ?
Did you totally forget about the 1/16th scale? That would help a lot of Us who use them. The rules may generally apply across the board, but the specifics of that particular scale would be appreciated. I have a brushless 1/16 Traxxas mini e-revo VXL and want to make it top-out in speed. Which exact pair of gears would I need?
No, I just didn't reference all scales in this video. Gear ratio calculations are the same regardless of scale. What MIGHT change is the pitch and number of teeth on the gears, but calculating the gear ratios are always the same. A larger pinion and/or smaller spur gear would give you more top speed but less acceleration. A smaller pinion and/or larger spur gear would give less top speed but more acceleration. - Gary
I have a slash 4x4 platinum, I would like to put pro-line 2.8 trenchers on it on all 4 wheels. What pinion and spur should I use? My motor and ESC is stock.
Great Video, thumbs up. Is there a way to determine the "pitch" of a random old spur? Want to convert an old 1/8 nitro buggy (Crono from 2001) to electric but can't figure out what pinion "pitch" to get. Again thanks for the educational video.
Hey, I've got an ecx circuit and I put a Titan 12 turn 550 motor on it. Well the motor kept getting too hot so I loosened up the gears. Next thing I know the spur gear gets stripped so I was wondering what pinion and spur gears should I use to get the fastest result (without striping the gears)
i have a arctic hobby land rider 305 on road car. i converted to a brushless but the grub screw was rounded so i bought a new motor mount and i have bought 2 different pinions 48 pitch and 32 pitch the 32 is too big and the 48 is a little bit too small.. im confused
That's exactly what it was!!! The slipper clutch I set to factory specs, but I may e too right because I just snapped the left driveshaft to the wheel now. It's not the part that goes to the motor but to the wheel, the whole thing slides off in 2 pieces. The little pin snapped on the end where the metal piece holds the wheel. I have no local hobby shop near me. Do you sell these? Thank you very much for your help sir!
Can someone help me? I have an ECX 1/10 4WD torment short course truck and it won’t move even though the battery is charged. If I lift the wheels off the ground and accelerate, the wheels will spin for a bit and then they will randomly lock up and make a jamming noise. I don’t know what it is that is causing the problem.
hi, i have a question hopefully you can answere. I just bout tge 2wd ecx torment brushed and when i plug the battery in, the truck starts going right away. i can steer but cant control the throttle. what would be the issue? i re binded remote and tried a different battery, but nothing. it ran fine the frst run.
I am not familiar with that brand or type of RC vehicle so I do not know, sorry. On the vehicles from Horizon Hobby, such as from ECX, Vaterra or Losi they feature Spektrum 2.4GHz radio systems and will not interfere with each other.
I've actually waited with buying an engine yet as I know this model, and it seems most Tamiya models, don't seem to like Brushless and LiPo's very much. So I'm picking the engine based on what is possible with the gear ratio, I just want it to be rather swift, don't have to break speed records but neither do I want to get anywhere near toy-grade speeds. (Which in my book is 25 MPH/40 KPH.) So hoped to put something in that'll make it go around 30-40 MPH/48-64 KPH. Question is, how many Turns/kV?
Really helpful guide, thanks! :D I'm only still trying to figure out what to do with my Tamiya M-05M Pro chassis, I want to run it with a brushless system, and the standard gearing options it comes with are 5.8:1, 6.44:1 and 7.25:1. Now I could just look up recommended gear ratio specs of some motors, but since this car is a front wheel drive mini 1:10 scale, won't that also affect what ratio is needed?
Referring to the math classes I thought I would never use, my very first thought when you said that was going to be using it here today was "I bet you're not". Because for me, that was Algebra lol. I worked for 25 years as a CNC programmer and machinist, and I never used Algebra one time after high school.
But this was a great video that really breaks things down. Good job, and thanks for sharing!
Generally speaking 48P gives you the best combination of durability and efficiency. What sort of car are you running?
7:20 is what I came here for
thanks
Same
Cheers, should be at start of video as introduction into gearing then all the more complicated stuff later in the video.
Yeah same here. I just need to get a new gearing to make it faster, and now I know how. I was ready to look for this timestamp myself.
To determine the pitch of any spur gear use the following formula:
P = (T+2)/D
P = Pitch, T = number of teeth in gear and D = the measured outside diameter of the gear.
The resulting calculation will give you a whole number with a decimal. Disregard the decimal value on the end. The whole number is the pitch of the gear.
Example:
I have a pinion gear with 18 teeth. The measured diameter with a pair of calipers yields 0.415 inch. Using the above formula, P = (T+2)/D = (18+2)/.415 = 48.193, the pitch of the gear is 48
I hope that helps.
Joe
I appreciate this type of refresher knowledge. Helps when you can “build and UN-build it in your head and logically”
Ahh the nostalgia. Classic video. ❤
They are all relations. For the larger gear to turn once, for example, how many times will the smaller gear have to turn. So for your first example, 7.35... The pinion gear will turn 7 full rotations and .35 of an 8th rotation. In this same time the spur gear will turn a total of one time. Hence 7.35(rotations):1(rotation)
It all depends on where you're running, the size of the straight away, the battery configuration and more. It's really unique to each track.
That is the overall desire, to have the best balance between top speed, acceleration and runtime.
As a general rule of thumb when you increase the RPMs of the motor you decrease the size of the pinion. So if you have a 13T motor you would gear it with a smaller pinion than say a 17T motor.
The lower the ratio will yield the faster top-speed but lower acceleration. The 32T pinion will give you more top speed. Cogging is caused by a number of reasons but the biggest is the motor/ESC themselves. The more you load a sensorless motor, however, can magnify that problem.
The FDR (Final Drive Ratio) of the Rustler transmission is 2.72:1. So for that transmission you would divide your spur gear tooth count by the pinion gear tooth count and multiply that by 2.72 to get your overall gear ratio. So for wha you have now, 32 / 32 x 2.72= 2.72 for your gear ratio.
@fieryguns Absolutely! Many people have learned on the Super Cub! And it's gotten even better in recent years with a battery upgrade to LiPo and a transmitter/receiver upgrade to Spektrum DSM2 radio gear. You may also want to check out the new HobbyZone Stratos as well.
It was like a math lesson, but very informative thanks :)
Sounds like your setscrew on the pinion gear backed off is all. Check and see if you can move the gear on the output shaft of the motor. If it moves you just need to tighten the little screw down. If that isn't it I would check to make sure the slipper clutch is tight.
There is only one spur gear for ECX, 87T. I would drop a few teeth on the pinion from stock, 2-3 would be a good starting place. If your gear mesh and slipper are properly set there should be no reason the gears get stripped just by changing motors.
I know this is an old video but this helped so much! Thank you horizon hobby
@fieryguns It's pretty robust. Plus it's made out of Z-Foam which can be re-glued with any sort of CA, it doesn't need to be the foam-safe variety. If you happen to brake something there's also a full line of replacement parts for both planes.
Do u know anything about the hpi jumpshot sc v2
With the M05 you have an interesting challenge due to the fixed nature of the motor mounting system. For a brushless I am assuming you're running a 17.5? I think most people are running the largest pinion you can fit in there, so a 5.8:1. The fact that it is front vs rear wheel drive won't affect anything.
great video!! i finally feel like i have the basics of gearing down pat.
The problem is that you can get that size spur gear in a variety of pitches. Pitch and tooth count are completely independent from each other.
Cool video, it can't get any better than this.
I swear these videos are gold for rc wannabe kidz like me.
@charles1matt Yes, if you're overgeared (too large of a pinion or too small of a spur gear) the motor will overheat. If that's the case just start taking teeth off of the pinion 1-2 at a time until you hit an acceptable temperature.
Verry instructive video. I still have a question. If I want to go "in between", so more top speed and more acceleration. Is it possible using a spur gear with more teeth and a clutch bell with less teeth...??
Nice job explaining gearing. Can you recommend a short read that reinforces what you just demoed. I find it sinks in better. Thanx
This is awesome for a new person to hobby, now because of you I now know what type of pinion I'll ever need just by looking, and also taking into account the application I'll be using💎💎💎💎❤️👊🏿
It really all depends on the size of the track, along with how technical it is.
Anytime you increase RPM drop the pinion size. I'd say a 20T would be a good start from where you were at before.
Great video learned plenty do you cover direct drive?
how do you change a motor on an ECX roost without permanently screwing it up but make it faster at the same time?
On the RC8B2 yes, that would be good. On the Rascal are you converting that to brushless? If so I believe the spur gear is also Mod 1 so a 14-17T pinion should get you in the range there.
ive got a axial scx10 with a supershafty bomb proof transmission and a tekin roc412 500kv motor what is the best choice for a pinion gear ? 32 or 48 p
Horizon Hobbies I have the Kyosho Inferno Gt 2 Demon. I’m running stock 4s 100c 9000 man battery. It comes with a 17T pinion but I bought a 20T pinion. Is that good? Will it put too much torque on the motor?
So on a slash racing oval track with 45 ft straights go with 90 20 or 86 18? both are similar ratio but different rotating mass. u said bigger spur more effecient? thanks great video!
Bigger gears always provide more of a "flywheel" effect, which is typically beneficial in most circumstances. Bigger gears are also easier to "mesh" together.
Horizon Hobby. Thanks for the fast reply! I have been researching this for a week or so after a friend of mine said I should drop from 90 to 86 spur. I have read alot and seems people but heads on this issue, because of the larger pinion size causing weight and stress on motor? I am gonna try going back to 90 like u said see how temps run. thanks again for the in depth video!
@@leeroyexcavator9149 If you are running an aluminum or plastic pinion, the weight difference between each size will be almost nothing.
I can't post links on UA-cam but I believe that TRA1951 is the part number you're looking for. If you check on our website you can see a photo to compare.
Thanks for sharing Sir👍👍👍
It's not a horrible idea but I don't know how necessary I'd consider it. I have never used a metal gear diff with brushless in any of my race vehicles.
Define "Really Hot". 150-170 is about where you should expect things. Also what motor are you using, how much timing in the endbell and is there any timing or boost in the ESC?
The plates should be but you'll need to get different slipper pads for what ever brand of spur you go with.
My Arrma infraction came with a 46 tooth gear. I ordered a replacement that said it was for my car came 50 tooth, is that ok?
Thanks for the info I'm new to RC and bought a Losi Muggy and for now it's a little to fast for me so I'm trying to slow it down a little bit until I get use to it not to mention I'm hoping to get more torque for wheelies
hi mate thnks for video bt i would like to hv ur own advise abt my gearing..am converting a 1/5 scale harm to electric..am a bite out of fund due to expenses on esc,lipo n motor..i have the 730 kv and the 200 esc both trunigy trackstar..as my harm was petrol i was thinkin to keep my stock gearing which is 23 teeth pinion gear and 40 t spur gear.pinion gear r not so cheap and was thinking if these two pinion will be ok to use with this esc n motor,,what should i expect??top speed or acceleration?will it be safe aswell to use without overheating anythng or any other issue?if nt suitable what pinion gear do u reccomend?thnks
I want to upgrade my Stock Serpent S411 for pure parking lot top speed short to mid run time application. What Spur/Pinion combo would you recommend include pitch also please consider the belt drive gearing when responding. Would love to know your take on Motor, ESC, and battery recommendation to achieve all of this. Money no object. Looking forward to your reply. Thanks in advance !!!
8 years ago! Not sure if you still work there, but can you elaborate more on the last bit? How is it that the wheel size impacts the gearing? If I gear up (larger pinion), should I be dropping the size of my wheels at the same time?
If your using a larger pinion then you should use a smaller spur gear in most cases.
Hi , i love the video ! Nice job , but i got a question . If i wanna make my car go faster what should i do ?
Hi, I have a pretty old Losi XXX-t and I have mot seen any videos or pitures about the truck. I have only seen one other person who has had this particular truck. It is the XXX-T 1/10 scale competition rc truck kit. Now for the problem, I have net been able to find a good gearing guide besides this one but I am still confused. I have a castle sidewinder 3 5700kv setup. My friend built the truck for me way back when and I have just recently done a diff rebuild. That is besides the point though. My spur gear seems to be eating off my gear box! I have the original gear box and the original spur gear. The gear was brand new when I ran it. After 10 minutes of play the gear was basically gone! The gear mesh was correct. I know that the issue is either the gear or the motor plate but I don't know which and I don't want to go out spending money right and left. Any suggestions? If you need more information, just let me know :)
I have an ECX Torment 2wd and I just put a 9T brushed motor in it but I want to achieve more speed, so am I able to go up a gear for tooth or keep my stock ones? I use my ECX as like a Short course truck so I run it on grass and sand.
what spur and pinion size should I run on the 22 sct for indoor dirt track I'm running a 86 and a 18 and it seems kinda slow I have the losi 13.5t motor?
@fieryguns Either the Stratos or Super Cub would be ideal for you. They are designed for the first-time pilot.
i hv a question. do they pinion n spur gear size contribute to the cogging problem on rc? tq
So I am new to the hobby and I'm building different vehicles. How do I find out the maximum gear ratio for any particular motor? How do I find out how low and how high I can go on pinion and spur gears?
what would u suggest on kraton 6s with max 6 1650kv and a lrager than the stock tire? what gearing should i use so it wont hurt the motor or wont over heat? ...use it for bashing also...thanks
hi. im running a 14t pinion / 48t spur gear right now. if i want more torque or power on my low end i can change my spur gear to 46 or 47? im running a truggy on a very short course or small scale track. thanks. cheers!
Which ratio is beat for short course parking lot racing of a traxxas slash.
Great video! makes me think, i'm updating my maverick strada xb evo to brushless, its a 1/10 scale 4wd, so if I am aiming to get speeds at around 45mph, i just need to look at a higher KV motor esc combo and thats it? Or playing with gears is a must? Seems like leaving the stock gears is the safest option to prevent motor and ESC from overheating?
I have an ECX Torment and I want to change out the drive shafts. My question is there any metal driveshafts out their I can use to swap out the plastic drive shafts on the Torment.
If im running a rc on dirt concrete and grass what pionion is best 19t?
how much do gear modules (48DP, 64DP, etc.) matter? i may have ordered a wrong module pinion. how much will this affect it? (the gear fits, but i dunno)
If I current have a 83 spur & 18 pinion on my Slash 2WD, what combination/change would be in my best interest to gain more speed on a small asphalt oval track? Thank you! 🤘🏻
D.P.T. Bump up the pinion to 23 you should be happy with that
20-24t it's really in your best interest to but a 5 piece set starting with 20 and up and test to see what you like best, the Drag Slash comes with a 22t and 29t, I would say 20-22t to avoid heat problems.
Is that big spur gear a 82 teeth count? Or is that the pitch number.
wow thanks this really helps i understand more how this works than before great video!!!
brilliant video love it
what's a gd pinion to run with a 47t spur, I'm currently running a 21t pinion but the motor&esc gets very hot then the truggy will shut dwn do to overheating
motor-1950kv 6 pole
tire-3.8
I have a new 12turn motor cominng for my vaterra awd mustang it cones with a 77 tooth spur should i use the 19tooth or 22 tooth i just want it to have a decent too speed and acceleration all together but mainly focusing on just hauling around sliding and drifting
You shouldn't have to change any capacitors when increasing voltage UNLESS they are not rated to handle that voltage.
i have an sakura d4 awd 1/10
i have a 4400 kv motor and i need to but a pinion gear to put onto the motor drife shaft but i dont know which one to buy. also the big gear is a 92t do i need a better one than that also?
What is a good spur gear and pinion gear for drag racing my 1:8th scale ...2900 tp motor
@fieryguns All our products are rated for ages 14 and up. I'm not saying that a 13 or 9-year old couldn't fly it its just not what we recommend.
I think most are running 17.5T or 13.5T motors in the Minis.
@fieryguns There's not a definitive range but it's easily as far as you can see.
Also with the 3500 velineon system if I were to use two 8.4v 3000mah nimh batterys would I need a bigger capacitor or would it not be possible.
I notice that there are multiple ways to get near the same FDR ie 104spur/52pinion = 3.800 fdr and so does 92spur/46pinion in my touring car how does that effect torque / acceleration? Or is 3.800 fdr just a 3.800 fdr no matter combination of spur/pinion?
While the FDR would be the same there are benefits and disadvantages to getting there with larger or smaller gears. Smaller gears have less rotating mass, therefore will spool up faster and yield better acceleration. However a larger gear will actually be more efficient at transferring power and, due to the slightly heavier rotating mass, have a bit of a flywheel effect which may increase corner speed when coasting.
Horizon Hobby Thanks!
I have a Traxxas Slash 2wd with stock tires and transmission and right now I have an 86 tooth spur and a 23 tooth pinion which equals a ratio of 3.74 and my transmission ratio is 2.72 which equals a final ratio of 10.17. Now if I were to keep the same spur and use a 32 tooth pinion I would get a final ratio of 7.32. With that ratio would I have higher speed or faster acceleration? I am also using a Traxxas velineon system with an 8.4v 3000mah nimh battery, so would that gearing cause cogging?
Do you have any videos of an RC Automatic gear box? just as the one used in the savage?
I don't think many RCs (if any) have automatic transmissions. Most are only 1-speed, if its 2-speed and up then its probably a manually switching drivetrain.
I-Know-My-Username-Is-Really-Long-But-I-Dont-Care-Because-Your-Opinion-Isnt-Worth-Jizz Actually most RC vehicles use a Centrifugal clutch to shift gears. Once the RPM of the gear hits a certain point the gears shift. This is how 1/8-scale nitro on-road cars and many nitro monster trucks shift.
HorizonHobbyProducts Ah, didn't know. I'm a 1/10 scale electric guy.
In my 1/10 brushless truggy with 31 teeth pinion (25 stock) when it accelerates from standing position, i detect some hesitation like its going to switch gear up!
The same symptoms goes even worst when i change the pinion gear, with bigger one.
Im using 3s Lipo with 150Ah esc but the motor is stock (2400kv).
I don't think that's your gears, it may be the motor. If the brushless motor isn't sensored, then it can cause hesitation like that or start cogging.
How does this all translate to rpms?
76/33=2.30, transmission is 3.0*2.30=6.9fdr
3600*7.4=26640rpm/2.30= 11582rpms set to the transmission. Would you divide the rpm by the FDR or the spur/pinion ratio? So 11582rpms*3.0 transmission=34746rpms ?
I put like before ending see the video cause I already know how he's good explaining things, helped me once though... :)
this was almost 10 years ago but with steel spur gears do they also get ate up as fast
Did you totally forget about the 1/16th scale? That would help a lot of Us who use them. The rules may generally apply across the board, but the specifics of that particular scale would be appreciated.
I have a brushless 1/16 Traxxas mini e-revo VXL and want to make it top-out in speed. Which exact pair of gears would I need?
No, I just didn't reference all scales in this video. Gear ratio calculations are the same regardless of scale. What MIGHT change is the pitch and number of teeth on the gears, but calculating the gear ratios are always the same.
A larger pinion and/or smaller spur gear would give you more top speed but less acceleration.
A smaller pinion and/or larger spur gear would give less top speed but more acceleration.
- Gary
i have a ecx amp mt electric car and whn i push the throttle foward or back it sound like it going fast but bearly moving
There's nothing I'm aware of. Not only would you need to swap out the driveshafts but the differential outdrives too.
I have a slash 4x4 platinum, I would like to put pro-line 2.8 trenchers on it on all 4 wheels. What pinion and spur should I use? My motor and ESC is stock.
I put trenchers on my ecx ruckus brushless without gearing down
Great Video, thumbs up.
Is there a way to determine the "pitch" of a random old spur?
Want to convert an old 1/8 nitro buggy (Crono from 2001) to electric but can't figure out what pinion "pitch" to get.
Again thanks for the educational video.
If it is an 1/8-scale buggy odds are you're looking at a Mod 1.0 gear.
Horizon Hobby
Cheers.
What is a good spur gear and pinion for a 1/8 scale for 132 ft drag racing
Hey, I've got an ecx circuit and I put a Titan 12 turn 550 motor on it. Well the motor kept getting too hot so I loosened up the gears. Next thing I know the spur gear gets stripped so I was wondering what pinion and spur gears should I use to get the fastest result (without striping the gears)
@fieryguns Well this is more for the surface crowd than the airplane or heli fans. What can we help you out with on planes?
It could be .6 module, basically "Metric 48-pitch". I am not familiar with that car or company so I don't know what it uses, sorry.
Very simplified thanks
i have a arctic hobby land rider 305 on road car. i converted to a brushless but the grub screw was rounded so i bought a new motor mount and i have bought 2 different pinions 48 pitch and 32 pitch the 32 is too big and the 48 is a little bit too small.. im confused
That's exactly what it was!!! The slipper clutch I set to factory specs, but I may e too right because I just snapped the left driveshaft to the wheel now. It's not the part that goes to the motor but to the wheel, the whole thing slides off in 2 pieces. The little pin snapped on the end where the metal piece holds the wheel. I have no local hobby shop near me. Do you sell these? Thank you very much for your help sir!
@horizon hobby what would you gear a rustler with an sv3 4600 for offroad??..was given to me with no spur or pinion and i am new to the hobby
Can someone help me? I have an ECX 1/10 4WD torment short course truck and it won’t move even though the battery is charged. If I lift the wheels off the ground and accelerate, the wheels will spin for a bit and then they will randomly lock up and make a jamming noise. I don’t know what it is that is causing the problem.
Should I go with a metal diff gear if going brushless? I own a Duratrax Evader ST
hi, i have a question hopefully you can answere. I just bout tge 2wd ecx torment brushed and when i plug the battery in, the truck starts going right away. i can steer but cant control the throttle. what would be the issue? i re binded remote and tried a different battery, but nothing. it ran fine the frst run.
***** calibrate the esc , same thing happend to me
Scan you put Komodo rc cars on different Chanel's so if you play with the same car at the same time they won't interfere with each other?
I am not familiar with that brand or type of RC vehicle so I do not know, sorry. On the vehicles from Horizon Hobby, such as from ECX, Vaterra or Losi they feature Spektrum 2.4GHz radio systems and will not interfere with each other.
I've actually waited with buying an engine yet as I know this model, and it seems most Tamiya models, don't seem to like Brushless and LiPo's very much. So I'm picking the engine based on what is possible with the gear ratio, I just want it to be rather swift, don't have to break speed records but neither do I want to get anywhere near toy-grade speeds. (Which in my book is 25 MPH/40 KPH.) So hoped to put something in that'll make it go around 30-40 MPH/48-64 KPH. Question is, how many Turns/kV?
What vehicle do you have? A lot of time you just need to see it.
that rpm pinion gear box, what is the part number? i want to get one
@fieryguns What don't you get? What can we help you out with?
Really helpful guide, thanks! :D I'm only still trying to figure out what to do with my Tamiya M-05M Pro chassis, I want to run it with a brushless system, and the standard gearing options it comes with are 5.8:1, 6.44:1 and 7.25:1. Now I could just look up recommended gear ratio specs of some motors, but since this car is a front wheel drive mini 1:10 scale, won't that also affect what ratio is needed?