Gears! - But Were Afraid To Ask (MiniLathe)
Video Statistics and Information
Channel: This Old Tony
Views: 2,786,351
Rating: 4.933785 out of 5
Keywords: metal gears, mini-lathe, minilathe, indexing, dividing, collet blocks, spin indexer, spindexer, dividing head, BS-0, involute, involute gears, gear cutters, module, diametral pitch
Id: Q-XOM4E4RZQ
Channel Id: undefined
Length: 29min 2sec (1742 seconds)
Published: Sat Feb 02 2019
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TOT, AvE, bigclive, Julian Ilett, EEVBlog... I could just spend an afternoon listen to them chat about their work.
Are there any other channels like those I listed that I might be missing from my collection of men my age talking while handling machines and electronics?
In my culture, entire wars have been fought over gears.
Seriously, I love this guy. I learn something new in every one of his videos and they are highly amusing to boot.
This was a great video. I never noticed how the involute profile changed with tooth count. Those dividing tools are mathematical porn.
The thing people donβt realize about the gear wars is that I was never really about the gears, at all.
But what he didn't seem to address is my biggest question:
How does one figure the correct diameter for the gear based on the tooth count?
He appears to have taken a random diameter blank in the video and just started cutting.
Sure, if you cut deep enough, you can start with a random size and just cut down to the right point, but how does one figure this?
Is there a chart for this? Did he address this but I missed it? He did say that gears are classified by tooth count not diameter, but surely the correct diameter is still required.
EDIT: Found it in the comments:
Michael Filler Really great explanation about the process of cutting gears! Thanks! I am left with 2 questions: How is the "pressure angle" related to the blue line when you talked about the involute profile resulting in constant speed; and how do you calculate the diameter of the blank, knowing the "module" and the number of teeth? Your visual aids, or as I call them "vids", really illustrate the concepts clearly (except when the lens fogged up). Keep up the good work!ο»Ώ
This Old Tony pressure angle is the angle of that blue line (to a line tangent to the gear circles). blank OD = # teeth x module + 2 x module. in my case for 100 T module 1 = 1x100+2x1 = 102mm.ο»Ώ
Opens video... Almost half an hour long! I'll just watch the first minute and save it for later.
Aaaand half an hour laterr....
Gears are fucking RAD tbh
This was a really great video. You're right, he put a TON of really great info in this video.