I have building up towards cutting gears watching video on dividing heads etc. I find this video most complete one out there. The whole process in one video. Thanks so much. Wish I was taking your course in the college/tec school. Your a great instructor
Great video! Thank you! I am gearing up (ha ha) to cut gears for the first time. Recently purchased a nice BS0 dividing head and my next purchase will be an involute gear cutter set.
Up until a few years ago I always assumed gears were cast in sand molds or dies and then polished and "cleaned up", I was surprised to learn that every tooth is actually cut one by one on a machine like this!
@@peterfitzpatrick7032 Yes, there's automated ways to produce the gears, but what I was referring to was not these one-offs but the fact that I thought they simply sand cast gears with all their teeth, ready to just ream out the center hole and "clean up" the edges of the teeth, but they are not just simply sand cast they are machined from blank stock.
A wonderful video with easy and clear instruction on the math and using an indexing/dividing head. Keep it up man I have subscribed cause I am getting my second lathe in a few weeks. Boning up on this stuff .... again...
If the gear arbour has a taper in it how can measuring either side be a good test for it being parallel? Is that why you said 0.5 thou diff is good? It just doesnt seem very accurate
At the start you said we only needed the O.D. the D.P. and the number of teeth, I agree...yet..you gave and used a formula for solving the pitch diameter? We don't need the pitch diameter. You also gave a factor for depth of cut ...my copy of 'Machinery's Handbook' says use 2.157/DP ?
Dear Mr. Liam, I have a question that is when you indicate the part parallel to the table. Between the time 3':40" - 4':10" in the video, you zero the indicator, then you move indicator to the other side, the other side is same height so then you call that good. Now, if the other side is not same height then how do you fix to make it same height?
Steven Mai Thank you for writing. If you look at the video at about 5:45 to 6:30, you can see bolts on the side of the tailstock, and a pry bar on the table just behind it. I loosened those bolts and used the pry bar to lift the center to the proper height. That procedure was cut out to shorten the length of the video. I hope that helps.
The shaft holding the blank is TAPERED hence left side of the blank and right side of the blank should show different numbers while the shaft is parallel to the table...Error is small but it is there!
There is a 1/2" hex head bolt under the chuck and a couple hold down clamps on the backside. It is most definitely clamped securely to the table. You can sort of see the hex head at about 6:30.
need your help!! if i have an outside diameter of 1.500 inches, what pitch should i cut to make two identical 1.500 inch gears mesh? centre to centre diameter is 1.435 inches. Gears are for an angle finder...there is no load on them
I don't like to publicly endorse any one tooling supply house, so I will suggest you search the Internet for "lathe mandrel". I did a Google search and came with several options starting under $20. I hope that helps.
mr it is probably an R8 spindle with an involuted gear cutter arbor (although the same arbor can probably be used for other cutters). Here is a description from a set available on eBay: 8Pcs Involute Gear Cutters (each cutter will cut a certain range of teeth) pressure angle: 20 degree Outside Dia: 55mm Inner Bore: 22mm Cutter Material: HSS R8 shank gear cutter threaded 7/16(Inch) drawbar R8 shank gear cutter holder fitting for hole 22mm center hole in the gear cutter Just search “R8 involute gear cutter set” on eBay or Banggood.
At about 7:45 minutes into the video I go through the formulas to find the diametral pitch. The formula I used is outside diameter times number of teeth divided by the number of teeth plus 2. At about 12 minutes I go through the formula. The 50 comes from the last half of that formula, 48 (number of teeth) plus 2.
Your boss tells you to cut a 48 tooth gear that 6 in in diameter tell them to go to hell because the number of teeth is what's going to indicate how big the gear is unless you have every gear cutter known to mankind but that would mean that it doesn't matter at all what any of the adjoining gears are the whole paradigm don't even make sense. It's more confusing than it was before
The DP number ( 7, 8, 10, 12 ,ect ) sort of work like pi , You multiply the diameter of a circle by pi to get the circumference. And with gear calculations you do the same, sort of. A one inch Diameter gear multiplied by 10 p =10 tooth gear that is 10 teeth around the circumference. A two inch gear multiplied by 10 p gives you a 20 tooth gear ect,ect and this gives you the pitch circle, so in order to find the outside diameter we add 2 (If you were to add a small number to pi you would get a bigger circle and we need a bigger circle ) But you say why 2 ,well it doesn't have to be 2 when you make stub tooth gears it could be 1.6 , It just so happens that 2 gives an Addendum (the part of the tooth above the pitch circle ) that has fairly good proportions for the job My guess is that 2 just sort of made gears that worked. You looking for some perfectly logical mathematical reason ....Tell me when you find it
I'm not sure where you came up with your formula. Look in the Machinery's Handbook under Spur Gearing. I used the 26th edition. Table 1 lists all of the formulas for standard spur gears. There are several formulas for determining the outside diameter that could work depending on the information you are given. The formula for determining the outside diameter when the number of teeth and the diametral pitch is known is as I stated, N+2/P.
I’m not sure I know what you are asking. But I will try to answer your questions. The dividing head is an important from MSC. Global Industrial offers a good selection of involute gear cutters. I made the arbor to fit.
I have building up towards cutting gears watching video on dividing heads etc. I find this video most complete one out there. The whole process in one video. Thanks so much. Wish I was taking your course in the college/tec school. Your a great instructor
Cool example, thanks. Must be fun working with such great equipment.
Nice video, very clear. Thanks for your work! Would of been nice to see the finished gear though :P
Thanks for the video, your explanation was easy to understand for a retired carpenter like me. This is going into my library. Thanks, JB San Diego.
Great video! Thank you! I am gearing up (ha ha) to cut gears for the first time. Recently purchased a nice BS0 dividing head and my next purchase will be an involute gear cutter set.
Up until a few years ago I always assumed gears were cast in sand molds or dies and then polished and "cleaned up", I was surprised to learn that every tooth is actually cut one by one on a machine like this!
This isn't the way mass-produced gears are made. Its really just for one-offs.
Google "gear hobbing for production gears.. 😎👍☘️🍺
@@peterfitzpatrick7032 Yes, there's automated ways to produce the gears, but what I was referring to was not these one-offs but the fact that I thought they simply sand cast gears with all their teeth, ready to just ream out the center hole and "clean up" the edges of the teeth, but they are not just simply sand cast they are machined from blank stock.
might want to put the part between centers as the chuck might introduce some errors
A wonderful video with easy and clear instruction on the math and using an indexing/dividing head. Keep it up man I have subscribed cause I am getting my second lathe in a few weeks. Boning up on this stuff .... again...
If the gear arbour has a taper in it how can measuring either side be a good test for it being parallel? Is that why you said 0.5 thou diff is good? It just doesnt seem very accurate
Bagus tutorialnya, makasih sudah berbagi langsung subscribe & like
Looks I have have found someone to mentor as a new member into the milling family...please sir does this formula work on metric too?
Love from Ghana
At the start you said we only needed the O.D. the D.P. and the number of teeth, I agree...yet..you gave and used a formula for solving the pitch diameter? We don't need the pitch diameter. You also gave a factor for depth of cut ...my copy of 'Machinery's Handbook' says use 2.157/DP ?
Hi Liam
Certainly got a better idea now on gear cutting many thanks
So the whole depth on any gear is just the gear diameter divided by the diametral pitch?
I know this is an old video, but it just popped up in my feed. Enjoyed it. Sub'd.
Dear Mr. Liam, I have a question that is when you indicate the part parallel to the table. Between the time 3':40" -
4':10" in the video, you zero the indicator, then you move indicator to the other side, the other side is same height so then you call that good. Now, if the other side is not same height then how do you fix to make it same height?
Steven Mai Thank you for writing. If you look at the video at about 5:45 to 6:30, you can see bolts on the side of the tailstock, and a pry bar on the table just behind it. I loosened those bolts and used the pry bar to lift the center to the proper height. That procedure was cut out to shorten the length of the video. I hope that helps.
Liam Riggs Thank you so much Mr. Liam.
The shaft holding the blank is TAPERED hence left side of the blank and right side of the blank should show different numbers while the shaft is parallel to the table...Error is small but it is there!
Thank you so much 😍
What should the RPMs be set on the mill for cutting gears
Amazing. Always wondered how gears were made.
Nice video👍 But i did notice that the dividing head is not fixed to the table, unless it is bolted down another way🤔
There is a 1/2" hex head bolt under the chuck and a couple hold down clamps on the backside. It is most definitely clamped securely to the table. You can sort of see the hex head at about 6:30.
Have you done a video on making worm gears?
That was really well explained!
need your help!! if i have an outside diameter of 1.500 inches, what pitch should i cut to make two identical 1.500 inch gears mesh? centre to centre diameter is 1.435 inches. Gears are for an angle finder...there is no load on them
Where did you find the mandrel? I don’t have a lathe to make one on so was hoping to just buy a few
I don't like to publicly endorse any one tooling supply house, so I will suggest you search the Internet for "lathe mandrel". I did a Google search and came with several options starting under $20. I hope that helps.
Great explanation.
Thank you.
Mike
What is the size of the divider head
A very good video. thank you
Hmm could you reveal which spindle is installed in your mill?
mr it is probably an R8 spindle with an involuted gear cutter arbor (although the same arbor can probably be used for other cutters). Here is a description from a set available on eBay:
8Pcs Involute Gear Cutters (each cutter will cut a certain range of teeth)
pressure angle: 20 degree
Outside Dia: 55mm
Inner Bore: 22mm
Cutter Material: HSS
R8 shank gear cutter threaded 7/16(Inch) drawbar
R8 shank gear cutter holder fitting for hole 22mm center hole in the gear cutter
Just search “R8 involute gear cutter set” on eBay or Banggood.
How did you get the 50 when you went 300÷50=?? .thank you .I feel dumb for asking.
At about 7:45 minutes into the video I go through the formulas to find the diametral pitch. The formula I used is outside diameter times number of teeth divided by the number of teeth plus 2. At about 12 minutes I go through the formula. The 50 comes from the last half of that formula, 48 (number of teeth) plus 2.
great video & instructions
Great video, thanks
Great video, thanks for sharing
Your boss tells you to cut a 48 tooth gear that 6 in in diameter tell them to go to hell because the number of teeth is what's going to indicate how big the gear is unless you have every gear cutter known to mankind but that would mean that it doesn't matter at all what any of the adjoining gears are the whole paradigm don't even make sense. It's more confusing than it was before
Excellent video!!!
what is the cutting speed you used for the milling machine?
500rpm for the aluminum stock
Thanks a lot, very good info👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏
Thank you Thank you
Most informative video
Can anyone explain why you add +2 to the number of teeth? I understand it works I want to know why.
The DP number ( 7, 8, 10, 12 ,ect ) sort of work like pi , You multiply the diameter of a circle by pi to get the circumference. And with gear calculations you do the same, sort of. A one inch Diameter gear multiplied by 10 p =10 tooth gear that is 10 teeth around the circumference. A two inch gear multiplied by 10 p gives you a 20 tooth gear ect,ect and this gives you the pitch circle, so in order to find the outside diameter we add 2 (If you were to add a small number to pi you would get a bigger circle and we need a bigger circle ) But you say why 2 ,well it doesn't have to be 2 when you make stub tooth gears it could be 1.6 , It just so happens that 2 gives an Addendum (the part of the tooth above the pitch circle ) that has fairly good proportions for the job My guess is that 2 just sort of made gears that worked. You looking for some perfectly logical mathematical reason ....Tell me when you find it
hello where do you get the 1 3/5 from
40 over 8 equals 8/5 or 1.6 or 1 and 3/5
sorry, I was wrong above, It is 40/25 = 8/5 =1.6 or 1. 6/10 or 1 and 3/5
Very well done.
How did you get the 50 round the 48 off
In the formula you are asked to add 2 to the number of teeth. 48+2=50
sorry i relized i could here the volume very low because i had my head phones plugged in lol and not on my head no problem bud.
Thanks..good info.
Outstanding!👍👍👍
Liam thanks for video, but I think u got example 2 and 3 math wrong, the formula should be Do=D(n+2)
So example 2 should be 12.5"
And example 3 u used the same wrong formula so u also got the wrong answer
I'm not sure where you came up with your formula. Look in the Machinery's Handbook under Spur Gearing. I used the 26th edition. Table 1 lists all of the formulas for standard spur gears. There are several formulas for determining the outside diameter that could work depending on the information you are given. The formula for determining the outside diameter when the number of teeth and the diametral pitch is known is as I stated, N+2/P.
Nice video i know the formula thnk you
I subscribe 👍👍👍👍
Sir I'm from India I want a work . But I couldn't find any job in my country. I'm a skilled worker for leath and milling machine... plz help me
Dear sir
Plz. Clear to gear center
Tow gear bitvin center vlear
thanks ,dear sir
Good
Thanks dear sir,
Liked it was informative but would have liked to seem the end product....
супер!!!БРАВО!!
Thk
turn up the volume---------- not good volume.
Heighth isn't a word it's height
You tell that to the depth dept😂
Ó canal ferreira motos, ( torno caseiro ) é apaixonado por está máquina. ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷
ask permission to share
All of my instructional videos are free to share
@@TheOriginalLiam thankyou
I’m a slob . My mill looks horrid .
YUH
الي جاي من عند الزول يعطيني لايك
Where did you buy the press tool at
I’m not sure I know what you are asking. But I will try to answer your questions. The dividing head is an important from MSC. Global Industrial offers a good selection of involute gear cutters. I made the arbor to fit.