eureka relieving tool

G

gmcken

Registered
Registered
Joined
Sep 2, 2013
Messages
69
Has any of the members here made or used the Eureka relieving tool ? This tool allows a person to make cutters to cut gears.. Any drawings or information would be helpful
 
Thanks for posting the request - it reminded me of that tool.

I just ordered the book, too!
 
Is this a relieving tool that shunts the compound in and out as the work revolves,so you can make milling cutters,etc? It is geared to the gear train on the back of the lathe. If so,I might get the book.
 
There is an eccentric shaft that is driven my the lathe spindle, the cutter rides on a carrier, and a ratched indexes the cutter on each rotation of the spindle. Pretty cool design. Here is a video of one in action

[video=youtube_share;Wg0V36H6HsU]http://youtu.be/Wg0V36H6HsU[/video]

Another guy adapted the design for relieving hobs

[video=youtube_share;kJ8kyC_bpHs]http://youtu.be/kJ8kyC_bpHs[/video]

Kind of hypnotic. I have the Law book and recommend it. Even if you have only a passing interest in gear systems, and don't plan on building eureka, I highly recommend the book. It has the clearest description of the cycloid system I have ever read.

As an aside, you don't need eureka to relieve cutters, you can do multi tooth cutters with simpler fixtures. I think eureka allows you to get higher tooth count cutters though. Here is a description of the method I am talking about:

http://www.deansphotographica.com/machining/projects/multipoint/multipoint.html

I don't think you could go more than a 4 tooth cutter with this method, whereas with eureka though should be able to do many more.
 
Thanks for the feedback. I have the book ordered an waiting for it to arrive. I have made several gears and now have an interest in making the cutters to make more gears.
 
You must log in or register to reply here.
Back
Top