Thank you for this tutorial, it was well planed out and straightforward. I liked it particularly because it helped me join the concept of making an involute for a circle and then using it to design the gear teeth. I will definitely recommend this vid to my friends and comeback latter to watch it again.
Great series Sir! I'm an electrical engineer and occasionally need some knowledge of other fields and this one is brilliant and gives a lot of insight even to a beginner.
Really enjoyed your presentation. I had a lot of problems with the gear losing definition as I trimmed the reference geometry starting at 15:59. I solved this by converting some of the template geometry and then only extruding the gear teeth. Tried it with multiple equations and seem to work fine..
At 13:35 you add a construction line to mirror the involute. How exactly is this line defined? I get that the other construction line is placed at half the circular pitch. But how exactly do you define where to mirror the involute? At least it looks like you just place this mirror-line anywhere freely on the pitch circle.
Thank you for the demonstration, especially parts 1 and 2 with the detailed calculations. 25:16 - It's been some time since I made gears so I'm a little rusty here. I don't understand why there so much backlash between the two gears here. In fact, if the piech diameter circles are tangent to each other, there should be constant clashing between the two gears. They should be touching at all times, on both sides of the closest two teeth. In design, I have to add backlash by either separating the two centers of circles or putting an offset on the gear profiles in order to actually allow them to mesh properly. It might be because of the coarse design of the involute, but I don't think it would account for such gaps.
Try the rack and pinion gear tutorial. I did that more recently and eradicated the built in backlash. It’s very similar to the video 3 you have watched with a minor tweak. I will be updating video 3
great video. but why does there appear to be so much backlash in the gear mesh? is there a more idealized way to space out the gear teeth to eliminate this or is that gap necessary in some way?
Hey good content man, if you see at 5:40 the formula of Addendum circle as u mentioned is {Pitch circle + (Module * 2)} As per your values this should be 64mm, but u have 104mm, is it right? or am I wrong, can you clarify that part?
Only the first circle updates until the equation panel is closed. All the other equations think they are linking to the old value (100mm) until the software updates. All the circles change as soon as the user accepted
When you're drawing the actual involute, what tool are you using? Arc tool? Line tool? If it is an arc tool, how do you make it go through all the point?
The involute template is a spline. The overlaid profile in the later step is a curve. The overlay is used to prevent possible solidworks errors when adjusting the size of the gear.
I have a question. If i want to make a gear ratio of 3:1, 3 rotations on the driving gear resulting in 1 rotation of the other gear, then what variable should i be changing? is it module or number of teeth, or is it the whole thing..? Also! very nice tutorial with easy to understand explanations and demonstrations
Start with the number of gear teeth to get the ratio. You may need to adjust the module & tooth count depending on the desired pitch circle diameter. If the combination is incompatible or leads to an unrealistic gear profile you will see it pretty quickly. If this is the case go back and make adjustments.
at 5:48 on the video as you click the OK box the base circle dimension can be seen changing as the formula applies. When examining the dimensions in the evaluate to column the only dimension that is correct is the pitch circle, the other 4 are incorrect. Advance to 5:55 in the video your sketch dimensions are all correct. Is that caused by Solidworks being slow at math or was it problems with the formulas and was edited out. That page you inserted the formula's on led to much confusion.
Most of the other circles are driven by the pitch circle dimension. The linked equations dont always update until you press ok and exit the equation menu. Even then, you sometimes have to prompt Solidworks to update by hitting the command at the top. Use the equations and you can’t go wrong. Check the results manually if you need as they are very simple equations. Try not to copy dimensions without the equations as you’ll get stuck.
Thanks for your work. But I dont understand why do you replace the evoluta (curve) what was made at 11:27 with an approximate circle of 2 points plus one point of tangent the the evoluta at 14:47/15:45. The profile of gear(s) in this case will not be a correct evoluta maybe like an evoluta only. I used to work with SolidWorks program in between 2008 and 2011 but could not find this method. Although I made evolute curves for plastic gears with Solid Edge program as step by step rolled down the staight on the base circle in two degree increments. As you did this in 3 steps.
There are a few ways you can make the curve. If you place the curve made at 11:27 and the rest of the tooth profile in a new sketch its possible to extrude the tooth without placing the approximate circle later. I mentioned in the video I used the approximate circle as this is the point when things can go wrong. I remember this happening in my practice attempts before making the video. In some instances in Solidworks, circles can be easier to manipulate than splines. So for this design I opted to use the spline as a template only. I can then place a circle, trim it and fix it to the spline. When the design changes the circle based curve will track the spline change. You are right that its not the original involute but it will match closely enough to produce a gear that will work in solidworks motion analysis. As an alternative, if you need a gear that absolutely tracks the involute without an approximate circle try building the involute curve and tooth profile in a new sketch before extruding.
@@PDWCreative Thanks for your reply. Well I know using splines it is a simple method during the 3D construction but in some case it causing problems. For example making CNC program or STL files for 3D models, because of the spline curve not exact, maybe it is a quarter to sixth(?) order approximation function - curve. In some cases, I was told that I was a visual designer because the CNC programgenerator couldn't made a program for my model.
There are sometimes problems with spline interpretation when converting from one cad format to another. I think circles, standard curves and lines translate across formats ok. But splines can are more free flowing and difficult to define. So when the CNC machine starts tracing the shape it will just stop at the point it doesn’t recognise the interpretation from the exported cad format. I’m not exactly sure why this is but it’s probably because different CAD softwares make non uniform shapes in different ways. Whereas they can all agree on common coding for standard shapes
@@PDWCreative Yes, it will be a great favour sir. Sir I have one more question that I am designing a gear of module 5. But according to equations ,provided in video 1, base circle is smaller than root circle. Pls let me know how can a gear can be designed in this situation.
The main difference between the two gears is the helix angle. It is generally between 15 to 30 degrees but can be more. You could try applying a twist to the modelled gear. I’ll try and make a video about it in the near future.
Thank you sir for this video, this explains things very clear for spur gears. Is it also possible to design a gear if the only thing known is that the toothed T5 Timing belt has a pitch from 5mm, and the only variable is the number of teeth on the gear? I have never seen a video, where you can calculate all the other parameters needed. It would be very nice if someone could explain that. Have a magic Christmas.
There are some parts of spur gear design applicable to this type of belt. But T5 belts use a slightly different profile. I don’t think they use involutes. You would still need to know the module.
@@PDWCreative Thank You, you are right, the profile is different, but also the way they calculate the gear, i think. According to the Technical-Section-Timing table of the SPD/SI company the pitch diameter of a 30 Tooth T5 Timing gear would be 47.9 mm witch is bigger then the outside Diameter 46.9, where in your calculation the pitch diameter of a 30 Tooth spur gear, with module 2, would be 60 mm and that is much less then the outside or Addendum. Also the Module of timing gears seem to change with the number of Teeth. Example for a 30 Toothed timing gear the module would be the pitch diameter divided by the number of teeth = 1.9566 where the module of a 111 toothed T5 gear the module would be 176.85 / 111 = 1.5932. The pitch of a T5 timing gear is 5mm measured from one tooth to another on a belt laying flat on a surface. So, many mysteries for me there. Anyway thank you for your time. Jean
There needs to be some gap to allow the gears to mesh. You could try experimenting with a different module and pressure angle. A smaller module gives a finer tooth. Just be careful not to go too fine. You may start to see the gears slip
There's a bit of an error at 12:20. The circular pitch (360deg/no teeth = 12deg) should be defined where the involute touches the pitch circle not at the base circle. Also the midpoint relation used to mirror the involute profile can cause errors at higher numbers of teeth. I'd recommend this video as a supplement : ua-cam.com/video/22K6xWNwVLE/v-deo.html
Your not wrong. I need to update this video. I've updated the method in the following link. As soon as I have time I will be re-recording this explanation.ua-cam.com/video/Hly5F82-PYQ/v-deo.html
Try looking through the equations list and finding the conflict. Also check the statement structure. If you don’t get it exactly right Solidworks will not understand
You Skipped many things in between.. wasted my day in repeating what you have done ... In the 3D modeling... Things were over constrained... Moreover this is though way to make gear... That too without accuracy... You said the tangent will intersect with outer circle.. it didn't.. even though my values were accurate to 4 digits after decimal...
Its difficult to know what went wrong in your model without more details. I didn't edit out any of the steps I took in this tutorial so you should end up with the same result I did. But if you are looking for a different pressure angle, module and tooth count, things can get out of control very quickly as there are limits to how far you can vary each in combination.
I appreciate the frustration as I too often have difficulty struggling through UA-cam tutorials. However, this person has put in a lot of effort to make these overall get professional videos, so we should use a more respectful tone.
@PDWCreative At work I use solidworks and at home I use Autodesk. Hands down Autodesk is faster for modeling, assembly, and animation. The only thing I like in solidworks is drafting. Your video was great though. My frustration lies with solidworks and the user interface.
Thank you for this tutorial, it was well planed out and straightforward. I liked it particularly because it helped me join the concept of making an involute for a circle and then using it to design the gear teeth. I will definitely recommend this vid to my friends and comeback latter to watch it again.
Thank you for this, best vid on youtube for spur gear design in solidworks
Thank you, it’s nice to know it’s useful
Great series Sir! I'm an electrical engineer and occasionally need some knowledge of other fields and this one is brilliant and gives a lot of insight even to a beginner.
Thank you sir very much for this short and straight forward explanation series of gears! Very interesting and comprehensible!
Really enjoyed your presentation. I had a lot of problems with the gear losing definition as I trimmed the reference geometry starting at 15:59. I solved this by converting some of the template geometry and then only extruding the gear teeth. Tried it with multiple equations and seem to work fine..
This tutorial was life changing for me as an Engineering student. Thank you for this! Do you have a video on Internal tooth gears as well?
Only one showing Solidworks standard templates. It’s on my list of ones to make
@@PDWCreative hi excuse me can you show how to make watch wheels please?
At 13:35 you add a construction line to mirror the involute.
How exactly is this line defined?
I get that the other construction line is placed at half the circular pitch. But how exactly do you define where to mirror the involute?
At least it looks like you just place this mirror-line anywhere freely on the pitch circle.
Its a midpoint constraint. The option turns yellow in the video just before its placed
i might be missign something but what is the construction line that is used for the midpoint constrained to? is it an arbitrary angle?
@@PDWCreative
Thank you for the demonstration, especially parts 1 and 2 with the detailed calculations.
25:16 - It's been some time since I made gears so I'm a little rusty here. I don't understand why there so much backlash between the two gears here. In fact, if the piech diameter circles are tangent to each other, there should be constant clashing between the two gears. They should be touching at all times, on both sides of the closest two teeth. In design, I have to add backlash by either separating the two centers of circles or putting an offset on the gear profiles in order to actually allow them to mesh properly.
It might be because of the coarse design of the involute, but I don't think it would account for such gaps.
Try the rack and pinion gear tutorial. I did that more recently and eradicated the built in backlash. It’s very similar to the video 3 you have watched with a minor tweak. I will be updating video 3
@@PDWCreative Thanks for the reply. I will check it out shortly.
Hi. Very helpful. Thanks. 🙏🙏🙏
Excellent.. unbelievable tut...
great video. but why does there appear to be so much backlash in the gear mesh? is there a more idealized way to space out the gear teeth to eliminate this or is that gap necessary in some way?
Try this alternative. This is a version of the gear with no backlash ua-cam.com/video/Hly5F82-PYQ/v-deo.html
Very helpful... And nice way of explaining 🙏
Thank you! Glad to help
Hey good content man, if you see at 5:40 the formula of Addendum circle as u mentioned is {Pitch circle + (Module * 2)} As per your values this should be 64mm, but u have 104mm, is it right? or am I wrong, can you clarify that part?
Only the first circle updates until the equation panel is closed. All the other equations think they are linking to the old value (100mm) until the software updates. All the circles change as soon as the user accepted
Thank you for video.
dont stop brother. good content
really, you made it easy thank you.
Thank you. I enjoyed making this one
When you're drawing the actual involute, what tool are you using? Arc tool? Line tool? If it is an arc tool, how do you make it go through all the point?
The involute template is a spline. The overlaid profile in the later step is a curve. The overlay is used to prevent possible solidworks errors when adjusting the size of the gear.
@@PDWCreative thankyou👍
I have a question. If i want to make a gear ratio of 3:1, 3 rotations on the driving gear resulting in 1 rotation of the other gear, then what variable should i be changing? is it module or number of teeth, or is it the whole thing..?
Also! very nice tutorial with easy to understand explanations and demonstrations
Start with the number of gear teeth to get the ratio. You may need to adjust the module & tooth count depending on the desired pitch circle diameter. If the combination is incompatible or leads to an unrealistic gear profile you will see it pretty quickly. If this is the case go back and make adjustments.
@@PDWCreative thank you very much I will definitely be experimenting with it
at 5:48 on the video as you click the OK box the base circle dimension can be seen changing as the formula applies. When examining the dimensions in the evaluate to column the only dimension that is correct is the pitch circle, the other 4 are incorrect. Advance to 5:55 in the video your sketch dimensions are all correct. Is that caused by Solidworks being slow at math or was it problems with the formulas and was edited out. That page you inserted the formula's on led to much confusion.
Most of the other circles are driven by the pitch circle dimension. The linked equations dont always update until you press ok and exit the equation menu. Even then, you sometimes have to prompt Solidworks to update by hitting the command at the top.
Use the equations and you can’t go wrong. Check the results manually if you need as they are very simple equations. Try not to copy dimensions without the equations as you’ll get stuck.
Thanks for your work. But I dont understand why do you replace the evoluta (curve) what was made at 11:27 with an approximate circle of 2 points plus one point of tangent the the evoluta at 14:47/15:45.
The profile of gear(s) in this case will not be a correct evoluta maybe like an evoluta only.
I used to work with SolidWorks program in between 2008 and 2011 but could not find this method. Although I made evolute curves for plastic gears with Solid Edge program as step by step rolled down the staight on the base circle in two degree increments. As you did this in 3 steps.
There are a few ways you can make the curve. If you place the curve made at 11:27 and the rest of the tooth profile in a new sketch its possible to extrude the tooth without placing the approximate circle later. I mentioned in the video I used the approximate circle as this is the point when things can go wrong. I remember this happening in my practice attempts before making the video. In some instances in Solidworks, circles can be easier to manipulate than splines. So for this design I opted to use the spline as a template only. I can then place a circle, trim it and fix it to the spline. When the design changes the circle based curve will track the spline change. You are right that its not the original involute but it will match closely enough to produce a gear that will work in solidworks motion analysis.
As an alternative, if you need a gear that absolutely tracks the involute without an approximate circle try building the involute curve and tooth profile in a new sketch before extruding.
@@PDWCreative Thanks for your reply. Well I know using splines it is a simple method during the 3D construction but in some case it causing problems. For example making CNC program or STL files for 3D models, because of the spline curve not exact, maybe it is a quarter to sixth(?) order approximation function - curve.
In some cases, I was told that I was a visual designer because the CNC programgenerator couldn't made a program for my model.
There are sometimes problems with spline interpretation when converting from one cad format to another. I think circles, standard curves and lines translate across formats ok. But splines can are more free flowing and difficult to define. So when the CNC machine starts tracing the shape it will just stop at the point it doesn’t recognise the interpretation from the exported cad format. I’m not exactly sure why this is but it’s probably because different CAD softwares make non uniform shapes in different ways. Whereas they can all agree on common coding for standard shapes
Can you explain what is module in detail. How is it useful while manufacturing.
In order for two gears to mesh they must have the same module and pressure angle. If the modules are different the gears will be incompatible.
U deserve a like and subscribe!!
Hi Sir thanks for this video!
I want to how to control backlash and is it possible to achieve zero backlash or approches to zero backlash?
I need to do another video on backlash. There are different ways to apply it
@@PDWCreative Yes, it will be a great favour sir.
Sir I have one more question that I am designing a gear of module 5. But according to equations ,provided in video 1, base circle is smaller than root circle. Pls let me know how can a gear can be designed in this situation.
Very good
it's the best video for designing the spur gear but how can I turn it to a helical gear
The main difference between the two gears is the helix angle. It is generally between 15 to 30 degrees but can be more. You could try applying a twist to the modelled gear. I’ll try and make a video about it in the near future.
Thank you sir for this video, this explains things very clear for spur gears. Is it also possible to design a gear if the only thing known is that the toothed T5 Timing belt has a pitch from 5mm, and the only variable is the number of teeth on the gear? I have never seen a video, where you can calculate all the other parameters needed. It would be very nice if someone could explain that. Have a magic Christmas.
There are some parts of spur gear design applicable to this type of belt. But T5 belts use a slightly different profile. I don’t think they use involutes. You would still need to know the module.
@@PDWCreative Thank You, you are right, the profile is different, but also the way they calculate the gear, i think. According to the Technical-Section-Timing table of the SPD/SI company the pitch diameter of a 30 Tooth T5 Timing gear would be 47.9 mm witch is bigger then the outside Diameter 46.9, where in your calculation the pitch diameter of a 30 Tooth spur gear, with module 2, would be 60 mm and that is much less then the outside or Addendum.
Also the Module of timing gears seem to change with the number of Teeth. Example for a 30 Toothed timing gear the module would be the pitch diameter divided by the number of teeth = 1.9566 where the module of a 111 toothed T5 gear the module would be 176.85 / 111 = 1.5932.
The pitch of a T5 timing gear is 5mm measured from one tooth to another on a belt laying flat on a surface. So, many mysteries for me there. Anyway thank you for your time. Jean
It seems that the teeth of the two gears have a lot of play. Is there a way to optimize the width of the teeth?
There needs to be some gap to allow the gears to mesh. You could try experimenting with a different module and pressure angle. A smaller module gives a finer tooth. Just be careful not to go too fine. You may start to see the gears slip
There's a bit of an error at 12:20. The circular pitch (360deg/no teeth = 12deg) should be defined where the involute touches the pitch circle not at the base circle. Also the midpoint relation used to mirror the involute profile can cause errors at higher numbers of teeth. I'd recommend this video as a supplement : ua-cam.com/video/22K6xWNwVLE/v-deo.html
Your not wrong. I need to update this video. I've updated the method in the following link. As soon as I have time I will be re-recording this explanation.ua-cam.com/video/Hly5F82-PYQ/v-deo.html
thank you so much!
Thank you , How to draw if drawing have addendum modify ?
You should be able to modify the addendum using this method
Tnx
When Typing Equation , it is showing invalid equation
Try looking through the equations list and finding the conflict. Also check the statement structure. If you don’t get it exactly right Solidworks will not understand
Can you explain tha diametrical pitch
It’s all in the video equations
Brother can you send the drawing file
It’s best to set yours up following the steps. It’s a really useful template once you’ve gone through the pain once
Sir g iski source file hi send kerd dein kindly!!!!!
It’s best to follow the instructions to create the model
You Skipped many things in between.. wasted my day in repeating what you have done ... In the 3D modeling... Things were over constrained... Moreover this is though way to make gear... That too without accuracy... You said the tangent will intersect with outer circle.. it didn't.. even though my values were accurate to 4 digits after decimal...
Its difficult to know what went wrong in your model without more details. I didn't edit out any of the steps I took in this tutorial so you should end up with the same result I did. But if you are looking for a different pressure angle, module and tooth count, things can get out of control very quickly as there are limits to how far you can vary each in combination.
I appreciate the frustration as I too often have difficulty struggling through UA-cam tutorials. However, this person has put in a lot of effort to make these overall get professional videos, so we should use a more respectful tone.
Solidworks sucks. So much wasted time doing simple things.
There’s lots of ways to build most things in Solidworks. Try to find a method that works for you.
@PDWCreative At work I use solidworks and at home I use Autodesk. Hands down Autodesk is faster for modeling, assembly, and animation. The only thing I like in solidworks is drafting. Your video was great though. My frustration lies with solidworks and the user interface.