Gear cutting

Discussion on all milling machines vertical & horizontal, including but not limited to Bridgeports, Hardinge, South Bend, Clausing, Van Norman, including imports.

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KellyJones
Posts: 161
Joined: Mon Nov 29, 2010 10:10 pm
Location: Snohomish, WA

Gear cutting

Post by KellyJones » Thu Apr 30, 2020 1:26 pm

Successfully cut a gear on my milling machine. Very complex task, even with a form cutter.
Attachments
finished gear.jpg
Finished gear
gear cutting.jpg
cutting the gear
Set up 1.jpg
basic set up
gear blank.jpg
blank ready for cutting
Kelly Jones, PE
A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.
George Bernard Shaw
(1856-1950)

Harold_V
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Location: Onalaska, WA USA

Re: Gear cuting

Post by Harold_V » Thu Apr 30, 2020 4:24 pm

Well done, Kelly. Looks great!

H
Wise people talk because they have something to say. Fools talk because they have to say something.

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GlennW
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Re: Gear cuting

Post by GlennW » Thu Apr 30, 2020 9:31 pm

Very well done!
Glenn

Operating machines is perfectly safe......until you forget how dangerous it really is!

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SteveM
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Location: Wisconsin

Re: Gear cuting

Post by SteveM » Fri May 01, 2020 8:18 am

Nice.

It's a tedious, nerve wracking job from what I have seen on youtube videos.

I have to make some for my dividing head (ironically using my dividing head).

Steve

whateg0
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Location: Wichita, KS

Re: Gear cuting

Post by whateg0 » Fri May 01, 2020 1:49 pm

It is tedious, and even folks that we all admire can screw it up once in awhile. I recently watched a video of Stefan Gottswinter screwing up a gear because he didn't lock the quill. I have some worm gears to cut in the near future. I'll cut them in aluminum first, before scrapping a bunch of expensive bronze.

Dave

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tornitore45
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Location: USA Texas, Austin

Re: Gear cuting

Post by tornitore45 » Fri May 01, 2020 2:37 pm

I'll cut them in aluminum first, before scrapping a bunch of expensive bronze.
Good luck, that is no guarantee.

I once cut 4 camshaft
1st try mirror image of a good part
2nd try a double width lobe was cot short
3rd try I got everything down path, I was really jamming and overshoot the flank, made it almost round
This is ridiculous, better sleep over and try the next day
4th try I got a camshaft I could use
Mauro Gaetano
in Austin TX

whateg0
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Joined: Sat Mar 28, 2009 3:54 pm
Location: Wichita, KS

Re: Gear cuting

Post by whateg0 » Fri May 01, 2020 7:31 pm

tornitore45 wrote:
Fri May 01, 2020 2:37 pm
I'll cut them in aluminum first, before scrapping a bunch of expensive bronze.
Good luck, that is no guarantee.

I once cut 4 camshaft
1st try mirror image of a good part
2nd try a double width lobe was cot short
3rd try I got everything down path, I was really jamming and overshoot the flank, made it almost round
This is ridiculous, better sleep over and try the next day
4th try I got a camshaft I could use
So, you're saying I should cut it in aluminum first, second, and third? :P

Dave

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SteveM
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Location: Wisconsin

Re: Gear cuting

Post by SteveM » Fri May 01, 2020 10:18 pm

whateg0 wrote:
Fri May 01, 2020 7:31 pm
So, you're saying I should cut it in aluminum first, second, and third? :P
No, he's saying you cut all of them out of aluminum except the last one.

Steve

armscor 1
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Location: Philippines

Re: Gear cuting

Post by armscor 1 » Sat May 02, 2020 6:07 am

Cutting a 150 tooth mod1, you have to stay focused mind starts to drift off and that is where you forget the turns, forget to advance the sector arm or lock the spindle.
Total concentration and no interupptions

RMinMN
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Joined: Tue Jan 02, 2018 8:50 am

Re: Gear cuting

Post by RMinMN » Sat May 02, 2020 7:51 am

Would this be the good place to fit in a stepper motor to make the required amount of turns. They can be quite accurate and repeat very nicely without getting distracted. The gcode for something like that should be quite simple.

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tornitore45
Posts: 1961
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Location: USA Texas, Austin

Re: Gear cuting

Post by tornitore45 » Sat May 02, 2020 8:27 am

I did cut the 60 teeth gear perfectly and the 1.5 turns on the RT handle was chiseled in my mind.
When it came the time to cut the 30 teeth started out advancing 1.5 turns, after 4 or 5 teeth they look kind of small and crowded.
Mauro Gaetano
in Austin TX

whateg0
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Joined: Sat Mar 28, 2009 3:54 pm
Location: Wichita, KS

Re: Gear cuting

Post by whateg0 » Sat May 02, 2020 9:53 am

RMinMN wrote:
Sat May 02, 2020 7:51 am
Would this be the good place to fit in a stepper motor to make the required amount of turns. They can be quite accurate and repeat very nicely without getting distracted. The gcode for something like that should be quite simple.
Added benefit of not needing to be an integer number of holes, too!

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