Gears and gear cutting ivan law pdf

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Mike Ursu. PJ Media. Florinda Urbi. Quick links. Gears and gear cutting by Ivan Law Post by jscarmozza » Sun Feb 28, pm Has anyone made Ivan Law's Eureka form relieving device for making involuted gear cutters? I'm stuck on the dimensions shown in the tables for the 20 and 30 degree form cutters on pages and of Law's book.

At first glance I thought the dimensions were inches, but I don't think they are; can someone tell me what Ins or lns means? Thanks, John. Have you made the device? I'm just about done with it and was looking ahead to what was involved in making the form cutter but couldn't figure out what the units were.

I figured it might be some dimensionless unit, but had no idea what to do with it. My buddy's nephew needs a 30 degree cutter for a spline he's making and that was my motivation for making the Eureka. Thanks again, I don't think I would have gotten it on my own. Looks interesting. Re: Gears and gear cutting by Ivan Law Post by Russ Hanscom » Mon Feb 29, am A Eureka is on the to-do list but it has never quite made it to the top, Guess I need a project that requires several custom gears to get it to the top.

Let us know how the spline project turns out, I do have potential need for some of them. It works well, but I only used it for one cutter so far. I did find that the form tool I had made was not leaving a particularly good finish when relieving the cutter blank, which resulted in a less than ideal finish on the gear being cut. So spend some time or find the materials combination that will give a good finish to the cutter.

I was using O1 for the cutter blank, and had ground tungsten carbide disks for the form tool. Re: Gears and gear cutting by Ivan Law Post by jscarmozza » Mon Feb 29, pm Russ, I'll let you know how it turns out, I'm anxious to see the thing work myself! Wsippola, thanks for the heads up on the cutter materials, I was planning on using O1 for both the cutter and buttons.

I have the stock on hand so I'll probably use it, but I'll be especially careful with the heat treatment.