Great video. My father was a gearbox designer and these parameters were often spoken of at out house. He wrote software in Pascal to calculate the various design parameters and working life according to the various DIN/ISO/AGMA/BS standards that all had their own quirks. and incompatibilities. All new designs were metric but he often had to fall back to the other standards when repairs were required for older imported machines. Trip down memory lane, thanks.
That's a great video, thanks. I reverse engineer gears so infrequently that each time I have to re-learn what little I once knew about it, which is time consuming even with the notes I keep on it. Your video is much more concise, and also showed me how to do helicals, which I've never needed to do. I'll be adding a link to it to my notes, and probably checking out some of your other videos too. Thanks again.
Watching your explanation of the helical gear reminded me of a related experience. I worked with a mechanical engineer who specified which direction to feed the tap when tapping holes because he thought that tapping a hole in the "wrong" direction produced a left-hand thread. The machinists just played along with him. Since no incorrect threads were ever produced, the engineer never had any doubts.
I wonder if that would actually be possible with a very large diameter fine thread tap with lots of flutes? (And a lot of force). I expect it would just shred the tap.
@@AndysMachines Sorry, I didn't write my comment very well. The fellow I was referring to would always specify which side of the part to feed the tap into. There was no intention of trying to feed the tap opposite to the normal direction. His intention was to tap the hole from the same side as the fastener was threaded in. He sincerely believed that tapping from the opposite side produced a left-hand thread.
Some subjects are best learned from a video rather than falling a sleep reading a machinist book. This is one of those subjects. Great info, thanks for sharing! 👍
Thanks for the refresher! It’s been more than 30 years I studied this topic, and now that I need it your explanation helped me a lot. Hey I even remembered where my notes were. I need 2 gears in my new (used) lathe and I keep messing something in my calculations. I should’ve started with module and, if not working with diametral pitch. Thanks again.🙏
Thank you so much! I think it was my comment on your last video that prompted your making this one. I'm so glad. Now I have the information I need to either order an off the shelve gear for one of my old machines, or maybe even make one myself. Thank you!
Yes, it may well have been your question that prompted me to make this, though I've been asked how to identify gears a number of times, both on YT and in real life, so the next time it happens I can point them here!
It's an amazing compendium about gears identification. Kudos ! I'll save it for future reference. Thanks ! Edit: I'm anxious for part 2, bevel gears ? :o)
Each time I was typing a question the answer popped up! 20+ years go I wrote some software that helped me determine screw threads. I was restoring my 1966 Norton 650 SS at the time, and had biscuit tins with indeterminate rusty screws from previous repairs. The result was probabilistic in that, given diameters and very rough tpi/pitch, and correcting for 30 years of rust, a likely thread was proposed. It worked well. I wonder if something similar could be done for gears. The next step would be to determine screw threads and gear splodules optically, using a smartphone app.
I used to be given chewed up gears to remake at short notice due to production breakdowns etc. It was like being Sherlock Holmes at times but very satisfying when I sussed out what it was and created a sparkling replacement for the grateful customer.
Excellent learning video Thanks. But "what about the pressure angle" I was thinking. I am bogged down at this step, so I guess from your video I should just go with 20deg unless it looks too fat or too thin. With a small gear I find it hard to judge.
You can use 2 guage pins and a micrometer and a gear chart to find it, but that chart may be extemely hard to find unless you have a gear textbook, and it would only work for even tooth count gears. The best way realistically is to genereate the gear in a cad program, add guage pin cross sections in sketch, and measure the distance in cad and compare to a micrometer measurement
For pressure angle of a spur gear tooth, find the point on the tooth that is radially 5/9 (0.5555) of the distance from the root circle, to the crown of the tooth. Find the centerline of the tooth. This is the tooth's line of symmetry, which passes through the axis of the gear. Measure the angle between the tangent line of the tooth at the aforementioned point and the centerline of the tooth. And _that_ is the pressure angle. *Example 1:* If you find that the point on a tooth that is 5/9 the height of the tooth, has a tangent line angle that is 20° from the centerline of the tooth, then 20° is the pressure angle.
BRILLIANT, I've been searching for this exact explanation in simple layman's terms, for ages, came across an American one, but he waffled on for over 8 mins what you explained in 1min. 😊😊 I'm assuming the 25.4 you mention is 1" in mm ?
the last week or so I am literally trying to run all this down for some old transmission gears that are no longer made / in short supply and trying to figure out how to I.D and make my own should it become necessary ! Thank you !!!
Excellent! I can now finally identify the change gears on my Chinese made lathe/ milling combination machine. It has some damaged gears and I need to make new ones so I can screw cut some standard metric threads. Obviously I need to know the module so I can buy the involute cutters to do the job. I've got a rotary table with the disks with different holes in them for setting up the number of teeth, god my memory is getting bad these days I can't remember the correct name for them lol anyway thanks for this video it's so helpful.
8:22 Andy: "Okay then, what's this?" me "That's just like the one I'm trying to identify!" (except mine isn't helical) Andy: "Maybe I'll save that for another video." me: "Nooooo!!"
great video! waiting for your next video to find out measuring bevel gears for reverse engineering and also a way to find profile shifting .thanks man.
Awesome video! Any chance of you expanding on this and laying down some simple techniques for working out the profile shift factor for non-standard gears?
Bloody hell, you had me at 1:10 And here I thought that TubalCain (that was a schoolteacher) made it easy to understand, you have him beaten hands down
Looking forward to your «another video». Those helical bevel-gears are a nightmare to understand and even more so to replicate. Allmost there, CNCing in nylon, but still not perfect.
Spiral bevel to be exact. I used Gearteq to generate them in solidworks and sent them out for fabrication. They cost a fortune to make on those specialised gleason machines.
I didn't go too deeply into the theory in this video (I've covered this in other videos). The reason is that the pitch circle diameter of the gear is equal to the module x the number of teeth. The height the teeth protrude above the pitch circle is (called the addendum) is 1x the module and there is a tooth on each opposite side which makes the outside diameter equal the module x number of teeth +2 x module, which simplifies to module x no. teeth +2.
Great... What a cliffhanger, exactly at the moment when it got "interesting". Have to wait now for a second part, to identify my strange gear I have in front of me... :)
I think I'm missing something here. I have some old helical gears from a 1970s Triumph gearbox. I measured the OD of one of them (89.85mm.) and it has 33 teeth. That makes the Module = 2.567mm.. I take it that is the width of a tooth around the PCD? I've measured a tooth at the approx. PCD and it is 4.6mm.
The tooth pitch (one tooth+one space) is pi x module, which would be just over 8mm. One tooth width would be half of this, ~4mm, which is a lot closer to your measurement. It can be hard to estimate exactly where the PCD is so you might have measured slightly further down, it's a little above half the tooth depth. 2.567 module sounds like it's probably a 10DP gear (=2.54 module) or if it's likely to be metric then probably 2.5 module.
@@AndysMachines Thanks Andy. The gearbox was derived from the earlier TRs so probably 1960s or even 1950s. I'm guessing we were using imperial measurements back then?
It's an RF45 type milling machine, I have several videos on the hobbing attachment I built for it starting here: ruclips.net/video/7WleHVtIc1c/видео.html
Brilliant , I need to pick your brain. I have a left tooth gear and a right tooth gear both the same size in every way, with a missing gear in the middle but not only is it missing it will be a smaller one in size, How do I determine what tooth and pitch and module tooth gear cog to buy. I own a old jewelers hand crank roller for rolling gold and silver, between the rollers ,but at the top there would of been a T bar handle with the stem of the T bar running through a small tooth cog, So when I turn the T bar the smaller cog would turn, When this small cog turns it also turns the left and right bigger cogs and these raise the roller.
Does the rolling mill have helical gears for adjusting the gap between the rollers, or straight cut spur gears? If they are helical they can't be opposite-handed if there is only one gear in between. A left will only mesh with a right, so the centre drive gear must be the opposite of both the larger driven gears. Perhaps I misundertood, and you just meant they are located on the left and right? If they are spur gears, this can be calculated from the number of teeth, (outer) diameter, and center distance between the gears (measure across both and subtract the diameter of one).
@@AndysMachines If I put it in another way, if I am looking down at the top of the machine (,birds eye view) there are meant to be three gears all in a vertical line so all the centers are in line with each other, The gear on the left is present, the gear on the right is present ,the gear in the middle is missing , so if i was to look down from above at these gears it should look like this OoO but the little center gear in the middle would be more central in line with the left and right , but at the moment it looks like this O O as there is a missing middle smaller gear. Now the left and right gears cannot be moved closer or further as they have center shafts holding them in there position, So the space between them can not be adjusted, So I need to find out what size , pitch and module gear is needed to fit into the center between the other gears, so when turning the middle gear, clock or anti clock it will turn the left and right gear at the same time. IF you could look up jewelers rolling mill on E bay you will see the three gears at the top, the middle one will have a T bar or a round wheel and handle connected to it by a shaft, this is the one that`s missing, on mine
Yes, I know what a rolling mill is. I was confused by your original description of left tooth/right tooth gears, but I think the gears should be straight toothed spur gears? (Teeth not at an angle). Can you provide the measurements above? (no. teeth, OD, center distance). If so I should be able work out what you need.
Now what if they are Stub Tooth gears? Used to cut a lot of those. The Fellows variety. The pitch circle was one DP. And the tooth height was another. The gear pitches expressed by the pitch circle over the tooth height. One example being a 40 tooth 10/12 DP gear. A pitch diameter of 4.000 and an overall diameter of 4.000 + (1/12 x 2).
Experienced eyes would spot the pressure angle or stub teeth etc. Some corrected gears can appear a different pressure angle and when I used to design gears for the motor sport industry, We would often design gears with corrections so that standard tooling can be used for designing strong high pressure angle gears. (Not easy to spot with the nakid eye though)
I'm going to be doing a video soon showing making a worm and wormwheel. I might do one in the future hobbing spur and helical gears with calculations etc. I get a lot of questions about how to do this.
@@AndysMachines it's a skill not usually shared, never have found here in YT a proper tutorial about helical gear. Your explanation and how to's are outstanding! Big thanks!
I didn't touch on this subject, profile shift is basically cutting a gear with a modified pitch circle diameter. eg. you might cut 8 teeth on a gear blank that is the diameter of a 9 tooth gear. This produces a different tooth profile (less undercutting). It is often done on gears with low tooth counts (
Great video.
My father was a gearbox designer and these parameters were often spoken of at out house. He wrote software in Pascal to calculate the various design parameters and working life according to the various DIN/ISO/AGMA/BS standards that all had their own quirks. and incompatibilities. All new designs were metric but he often had to fall back to the other standards when repairs were required for older imported machines.
Trip down memory lane, thanks.
YT is full of over complicated, underinforming rubbish about gears. This is the clearest, most informative video I have seen. Well done!
Can you tell me how to calculate the gear hob machine
Excellent video, please keep them coming, as you are the only person I've found that is putting this in to term even I can understand.
This is a very clear and no nonsense description of gears / gearing - exactly what I have been looking for!
That's a great video, thanks. I reverse engineer gears so infrequently that each time I have to re-learn what little I once knew about it, which is time consuming even with the notes I keep on it. Your video is much more concise, and also showed me how to do helicals, which I've never needed to do. I'll be adding a link to it to my notes, and probably checking out some of your other videos too. Thanks again.
Watching your explanation of the helical gear reminded me of a related experience. I worked with a mechanical engineer who specified which direction to feed the tap when tapping holes because he thought that tapping a hole in the "wrong" direction produced a left-hand thread. The machinists just played along with him. Since no incorrect threads were ever produced, the engineer never had any doubts.
I wonder if that would actually be possible with a very large diameter fine thread tap with lots of flutes? (And a lot of force). I expect it would just shred the tap.
@@AndysMachines Sorry, I didn't write my comment very well. The fellow I was referring to would always specify which side of the part to feed the tap into. There was no intention of trying to feed the tap opposite to the normal direction. His intention was to tap the hole from the same side as the fastener was threaded in. He sincerely believed that tapping from the opposite side produced a left-hand thread.
@@andrewhall2554 If he was making a taper pipe thread then he was right to be careful. :-)
Some subjects are best learned from a video rather than falling a sleep reading a machinist book. This is one of those subjects. Great info, thanks for sharing! 👍
This channel is better than school. Gratitude
Got me with the Thanks for watching.
Seriously though, that intro was perfect for figuring out Module gears.
Sir thank you, I was ignorant on this stuff, thanks so much for taking time to wisen me up.
Thanks for the refresher! It’s been more than 30 years I studied this topic, and now that I need it your explanation helped me a lot. Hey I even remembered where my notes were. I need 2 gears in my new (used) lathe and I keep messing something in my calculations. I should’ve started with module and, if not working with diametral pitch. Thanks again.🙏
Simple and useful video. First time I understood the left handed and right handed helical gear. Thanks a lot sir.,
The best and most wonderful explanation I have ever seen in my life Thank you very much and we want more videos full of knowledge Well done sir
Thank you so much! I think it was my comment on your last video that prompted your making this one. I'm so glad. Now I have the information I need to either order an off the shelve gear for one of my old machines, or maybe even make one myself. Thank you!
Yes, it may well have been your question that prompted me to make this, though I've been asked how to identify gears a number of times, both on YT and in real life, so the next time it happens I can point them here!
You earned my subscription. Simple and clear explaination. Thank you.
Very clear and well explained. Looking forward to your next episode.
It's an amazing compendium about gears identification. Kudos ! I'll save it for future reference. Thanks !
Edit: I'm anxious for part 2, bevel gears ? :o)
Terrific video! Really looking forward to the spiral bevel gear video as that's what I need atm. Thanks for explaining so clearly:)
Excellent explained for gear module. Now you should make another video on bavel gear module formula.🎉🎉
excellent description thankyou
You didnt make my nose eyes and ears bleed from brain overheating and I can now actually do it..... thankyou very much
Tanks! I learned a lot about gears with your videos, never learned anything reading books about this topic! Now, a gear is less intimidating!
Each time I was typing a question the answer popped up!
20+ years go I wrote some software that helped me determine screw threads. I was restoring my 1966 Norton 650 SS at the time, and had biscuit tins with indeterminate rusty screws from previous repairs. The result was probabilistic in that, given diameters and very rough tpi/pitch, and correcting for 30 years of rust, a likely thread was proposed. It worked well. I wonder if something similar could be done for gears.
The next step would be to determine screw threads and gear splodules optically, using a smartphone app.
Very great explanation💐💐💐
This was exactly what I needed no more no less. Thank you.
A very clear explanation, thanks Andy
Thankyou for making this so incredibly easy to understand its helped me a lot
Very good job my friend.... 👍 👍 👍 👍
Your video helped me, it's easy to understand
thanks!
Well done - thanks! I look forward to the follow up video on bevel and whatever that last gear is called!
Thank you!! I bought a hand crank slicer and the handle with the gear is missing. I know what to look for now!
I used to be given chewed up gears to remake at short notice due to production breakdowns etc. It was like being Sherlock Holmes at times but very satisfying when I sussed out what it was and created a sparkling replacement for the grateful customer.
Amazing. Thanks for sharing. This is exactly what I was looking for. I'm just beginning to cut gears on my old Atlas.
Excellent learning video Thanks.
But "what about the pressure angle" I was thinking.
I am bogged down at this step, so I guess from your video I should just go with 20deg unless it looks too fat or too thin. With a small gear I find it hard to judge.
You can use 2 guage pins and a micrometer and a gear chart to find it, but that chart may be extemely hard to find unless you have a gear textbook, and it would only work for even tooth count gears. The best way realistically is to genereate the gear in a cad program, add guage pin cross sections in sketch, and measure the distance in cad and compare to a micrometer measurement
For pressure angle of a spur gear tooth, find the point on the tooth that is radially 5/9 (0.5555) of the distance from the root circle, to the crown of the tooth.
Find the centerline of the tooth. This is the tooth's line of symmetry, which passes through the axis of the gear.
Measure the angle between the tangent line of the tooth at the aforementioned point and the centerline of the tooth. And _that_ is the pressure angle.
*Example 1:* If you find that the point on a tooth that is 5/9 the height of the tooth, has a tangent line angle that is 20° from the centerline of the tooth, then 20° is the pressure angle.
You are awesome 👍🏻👍🏻🎉🎉 .. you got my subscription
Very fine explanation of this important technical fact. Great !
BRILLIANT, I've been searching for this exact explanation in simple layman's terms, for ages, came across an American one, but he waffled on for over 8 mins what you explained in 1min. 😊😊 I'm assuming the 25.4 you mention is 1" in mm ?
Thanks! Yes, 1" =25.4mm.
the last week or so I am literally trying to run all this down for some old transmission gears that are no longer made / in short supply and trying to figure out how to I.D and make my own should it become necessary ! Thank you !!!
Great video. I learned all that in school many decades ago, and The Algorithm must have known that I'd forgotten how to do it.
A wealth of information.
Thank you so much Sir!
I'll probably never use this knowledge but I really enjoyed it. Thanks
Very complete and useful explanations
Thank you
extremely useful! Thank you!
This really helped me to identify a helical gear! Thank You
Outstanding, stunningly informative. Many thanks for posting, subscribed 😊
This guy is legend👏👏👏 you cleared all my doubts🔥
Excellent! I can now finally identify the change gears on my Chinese made lathe/ milling combination machine. It has some damaged gears and I need to make new ones so I can screw cut some standard metric threads. Obviously I need to know the module so I can buy the involute cutters to do the job. I've got a rotary table with the disks with different holes in them for setting up the number of teeth, god my memory is getting bad these days I can't remember the correct name for them lol anyway thanks for this video it's so helpful.
Very informative! Thank you for taking the time to share
Great video, Andy. Don't be teasing me with that spyroid gear! ;)
Very well explained good job Thanks a lot!
Veree good 👍👍
8:22
Andy: "Okay then, what's this?"
me "That's just like the one I'm trying to identify!" (except mine isn't helical)
Andy: "Maybe I'll save that for another video."
me: "Nooooo!!"
Excellent Sir love from India
Well done!
great video!
waiting for your next video to find out measuring bevel gears for reverse engineering and also a way to find profile shifting .thanks man.
Thankyou so much for this!! Your explanations are very good 👍
Awesome video! Any chance of you expanding on this and laying down some simple techniques for working out the profile shift factor for non-standard gears?
Just what I'm looking for. Thanks for sharing 🙏
Great info and explanation. Thank you!
Great channel.
Good job
Very useful! Thanks for sharing your knowledge 👍
Bloody hell, you had me at 1:10 And here I thought that TubalCain (that was a schoolteacher) made it easy to understand, you have him beaten hands down
Great video!!! Thanks for posting! 👍
Superb 🎉🎉🎉🎉
Excellennt video, very clear, many thanks!
Very well made video
Damnit I wanted to know the last one lol nice video you do really clean work 👌
Excellent video, thank you much!
Thank you this is pure gold
Informative, Thanks...
You are the best!!! Thanks for the video
thank you!
Great video you're the mech. God.
Plz make for the bevel and other gears also...
Looking forward to your «another video». Those helical bevel-gears are a nightmare to understand and even more so to replicate. Allmost there, CNCing in nylon, but still not perfect.
Spiral bevel to be exact. I used Gearteq to generate them in solidworks and sent them out for fabrication. They cost a fortune to make on those specialised gleason machines.
Great info mate..thanks👍👍👍👍
Please keep making videos, they're great!
Why do you need to add 2 to the number of teeth when determine module or DP?
I didn't go too deeply into the theory in this video (I've covered this in other videos). The reason is that the pitch circle diameter of the gear is equal to the module x the number of teeth. The height the teeth protrude above the pitch circle is (called the addendum) is 1x the module and there is a tooth on each opposite side which makes the outside diameter equal the module x number of teeth +2 x module, which simplifies to module x no. teeth +2.
@@AndysMachines seems to me by that logic - the formula would be (OD-2)/N
Great... What a cliffhanger, exactly at the moment when it got "interesting".
Have to wait now for a second part, to identify my strange gear I have in front of me... :)
really nice video 👍
Great video! What animation software are you using and do you like it?
Very interesting. Thanks
I think I'm missing something here. I have some old helical gears from a 1970s Triumph gearbox. I measured the OD of one of them (89.85mm.) and it has 33 teeth. That makes the Module = 2.567mm.. I take it that is the width of a tooth around the PCD? I've measured a tooth at the approx. PCD and it is 4.6mm.
The tooth pitch (one tooth+one space) is pi x module, which would be just over 8mm. One tooth width would be half of this, ~4mm, which is a lot closer to your measurement. It can be hard to estimate exactly where the PCD is so you might have measured slightly further down, it's a little above half the tooth depth. 2.567 module sounds like it's probably a 10DP gear (=2.54 module) or if it's likely to be metric then probably 2.5 module.
@@AndysMachines Thanks Andy. The gearbox was derived from the earlier TRs so probably 1960s or even 1950s. I'm guessing we were using imperial measurements back then?
I'd guess imperial, but it could be either. 10DP and 2.5 mod are so close to each other though it might not make a difference.
Great information....thanx
I have a similar trick to figure out which hand is my left from which one is my right: The right hand is the one that has the thumb on the left. easy.
What about bevel helical gear? How to indentify it.
Thanks for explanation
5:18
Really clear thanks I enjoyed that. 😀
Thanks for sharing 👍
Very informative, thanks!
Hello. What kind of milling machine you use, and what modification do you make in it?
Greetings
It's an RF45 type milling machine, I have several videos on the hobbing attachment I built for it starting here: ruclips.net/video/7WleHVtIc1c/видео.html
Brilliant , I need to pick your brain.
I have a left tooth gear and a right tooth gear both the same size in every way, with a missing gear in the middle but not only is it missing it will be a smaller one in size,
How do I determine what tooth and pitch and module tooth gear cog to buy.
I own a old jewelers hand crank roller for rolling gold and silver, between the rollers ,but at the top there would of been a T bar handle with the stem of the T bar running through a small tooth cog, So when I turn the T bar the smaller cog would turn,
When this small cog turns it also turns the left and right bigger cogs and these raise the roller.
Does the rolling mill have helical gears for adjusting the gap between the rollers, or straight cut spur gears? If they are helical they can't be opposite-handed if there is only one gear in between. A left will only mesh with a right, so the centre drive gear must be the opposite of both the larger driven gears. Perhaps I misundertood, and you just meant they are located on the left and right? If they are spur gears, this can be calculated from the number of teeth, (outer) diameter, and center distance between the gears (measure across both and subtract the diameter of one).
@@AndysMachines If I put it in another way,
if I am looking down at the top of the machine (,birds eye view) there are meant to be three gears all in a vertical line so all the centers are in line with each other,
The gear on the left is present, the gear on the right is present ,the gear in the middle is missing , so if i was to look down from above at these gears it should look like this OoO but the little center gear in the middle would be more central in line with the left and right , but at the moment it looks like this O O as there is a missing middle smaller gear.
Now the left and right gears cannot be moved closer or further as they have center shafts holding them in there position,
So the space between them can not be adjusted,
So I need to find out what size , pitch and module gear is needed to fit into the center between the other gears,
so when turning the middle gear, clock or anti clock it will turn the left and right gear at the same time.
IF you could look up jewelers rolling mill on E bay you will see the three gears at the top, the middle one will have a T bar or a round wheel and handle connected to it by a shaft, this is the one that`s missing, on mine
Yes, I know what a rolling mill is. I was confused by your original description of left tooth/right tooth gears, but I think the gears should be straight toothed spur gears? (Teeth not at an angle). Can you provide the measurements above? (no. teeth, OD, center distance). If so I should be able work out what you need.
I also have a helical gear. o.d 39.25 helix angle 16 degrees, and 11 teeth. Does the profile shift factor affect the modulus of the gear?
Best regards
I'm still wondering where that formula came from.
Still great video.
I'm already waiting for the next episode
Now what if they are Stub Tooth gears? Used to cut a lot of those. The Fellows variety. The pitch circle was one DP. And the tooth height was another. The gear pitches expressed by the pitch circle over the tooth height. One example being a 40 tooth 10/12 DP gear. A pitch diameter of 4.000 and an overall diameter of 4.000 + (1/12 x 2).
Yes, they would be a special case, which would fall into the category of 'all the other types of gear I didn't mention'.
Experienced eyes would spot the pressure angle or stub teeth etc. Some corrected gears can appear a different pressure angle and when I used to design gears for the motor sport industry, We would often design gears with corrections so that standard tooling can be used for designing strong high pressure angle gears. (Not easy to spot with the nakid eye though)
What a nice job!
can't wait for the another video you mention at the end (I think its name is a bevel gear)
super sir
Please make a tutorial of how to make a helical gear from computation and set-up.
The conventional machining way.
I'm going to be doing a video soon showing making a worm and wormwheel. I might do one in the future hobbing spur and helical gears with calculations etc. I get a lot of questions about how to do this.
@@AndysMachines it's a skill not usually shared, never have found here in YT a proper tutorial about helical gear. Your explanation and how to's are outstanding! Big thanks!
wow this is good
Brilliant
Sir, how do we calculate profile shift factor. Thank you video
I didn't touch on this subject, profile shift is basically cutting a gear with a modified pitch circle diameter. eg. you might cut 8 teeth on a gear blank that is the diameter of a 9 tooth gear. This produces a different tooth profile (less undercutting). It is often done on gears with low tooth counts (
This was my bread and butter stuff back in the day when I was a gear engineer. Your videos are bringing it all back so thanks@@AndysMachines
Nice