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Gallery, Projects and General => Oooops! => Topic started by: chipenter on May 02, 2016, 03:46:50 PM

Title: Gear cutter
Post by: chipenter 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 .
Title: Re: Gear cutter
Post by: Lew_Merrick_PE 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.
Title: Re: Gear cutter
Post by: chipenter 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 .