Author Topic: Gear cutter  (Read 1277 times)

Online chipenter

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Gear cutter
« on: May 02, 2016, 03:46:50 PM »
I am making a small worm and wheel for a fouth cnc axis , the calks caled for a ten mm end mill but it was  a nine mm in the box , made the cutter then the worm tried them together wrong profile , checked calks twice wasted a lot of time untill I checked the end mill , have to set up again and redo it tomorow .
Jeff

Offline Lew_Merrick_PE

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Re: Gear cutter
« Reply #1 on: May 02, 2016, 03:58:49 PM »
Jeff,

I guess I am misunderstanding your problem.  The worm is merely a (usually) trapezoidal thread that mates to a hob-cut gear.  You can make a hob from an appropriately (trapezoidally) threaded piece of tool steel.  It's a PITA operation set, but its is PITA rather than a problem.

Online chipenter

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Re: Gear cutter
« Reply #2 on: May 02, 2016, 05:09:03 PM »
The worm is 14.5 degrees acme thread but the cutter looked like 20 degree presure angle , the one mm diference makes a biger angle .
Jeff