Author Topic: Gerrit's Eureka Relieving device build  (Read 5070 times)

Offline gerritv

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Re: Gerrit's Eureka Relieving device build
« Reply #30 on: October 15, 2018, 07:16:04 PM »
The next jig enables aligning the cutter blank to cut the gaps for teeth. A simple gadget, just s .500 rod in a flat to be mounted in the tool post. A .125" pin holds the blank from turning. The teeth are cut out using a slitting saw on arbor in the chuck.

Don't confuse activity with progress

Offline gerritv

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Re: Gerrit's Eureka Relieving device build
« Reply #31 on: October 15, 2018, 07:22:40 PM »
Of course once the teeth are cut you need to have a way to sharpen the teeth. For that I looked to the web to glean what the correct adapter is for my 1910's Cincinnati T&C grinder looks like. There happened to be one for sale on eBay so I captured the phots and made a work-alike in a somewhat less grandiose style.
I subsequently bought a CBN wheel which fits better into the tooth gaps. After hardening the cutter a few trips around the grinding attachment results in a sharp cutter. The first one resulted in lovely T2.5 teeth on the 3 pulleys I needed for my Ridder Glass 2 Stroke.
Don't confuse activity with progress