Jig Grinding Attachment
Jig Grinding Attachment
(OP)
I think Volstro makes one to attach to a Bridgeport milling machine but when I search on Google, I get someone other than Volstro like used equipment, ebay, etc.
We have infrequent need for sizing holes in Aluminum alloy parts to tolerances as close as +/- 0.00025". we can do it by reaming but the results are borderline as you might expect. These are obviously grinding tolerences and our hole location tolerances are not tight enough to justify a jig grinding machine.
I need to get some prices for new jig grinding attachment to present to my boss. Can somebody provide a link(s) to a supplier(s)?
We have infrequent need for sizing holes in Aluminum alloy parts to tolerances as close as +/- 0.00025". we can do it by reaming but the results are borderline as you might expect. These are obviously grinding tolerences and our hole location tolerances are not tight enough to justify a jig grinding machine.
I need to get some prices for new jig grinding attachment to present to my boss. Can somebody provide a link(s) to a supplier(s)?





RE: Jig Grinding Attachment
Our work is mostly with D2 and other tools steels. I don't remember any work with Al.
http://www.mooretool.com/jigrindr.htm
Have you looked at broach and hone?
RE: Jig Grinding Attachment
Broach and hone: No I have not considered this which is an interesting thought but I will. We do some very limited honing with Mickey Mouse hones -- the kind one buys at the local hardware or auto parts store and fits into a hand operated drill motor. I had not considered a good honing machine setup.
I am currently reworking some parts that were "honed" and fortunately are undersize, out-of-round, and tapered being only about 3/16" thick. I am using an adjustable hand reamer but on a Bridgeport at minimum speed with rigid setup which is about 85% effective because of the out-of round and taper.
RE: Jig Grinding Attachment
For your taper and out of roundness checkout the Helical Hone. The Engis tools will not go oversize.
http://www.engis.com/
This company is part of Engis.
http://www.helicallap.com/
RE: Jig Grinding Attachment
http://www.americanbroach.com/index.htm
http://www.kingsfordbroach.com/home.htm