Re: [CAD_CAM_EDM_DRO] Re: Angle grinder for high speed bits on a CNCBridgeport?

A long time ago, way before I had a surface grinder I made up two
toolholdes that I used in the lathe and the mill. One for the air-die
grinder a (bore with z travel) and one for the 4.5" hand grinder. (base
plate, 2 ears for the handle bolts and adjustable support for the motor)
The unit for the die grinder worked great, but the angle grinder became
a big problem. You never got accuracy and it woobled like hell.
On my mill I had a flat to screw on. on a Briggy I would go with a
splited bore and squeeze screw direct on the outside of the quill. Dont
hastle much with the spindle there is always too much play in the gear
coupling of the head that you will not get it comletely ´tight. And you
might damage it.
An electric die grinder is even of better quality than the air driven
units. quite a few local shops use them for internal cilindrical
grinding on their lathes in stead of internal spindles.
My 2 cents.
Sven Peter

washcomp wrote:

>
> I like the idea of an electric grinder as my compressor is small (no
> jokes now). Attaching it to the spindle is going to be challanging
> as the front of mine is covered by the Z axis stepper stuff. The BP
> has a fair amount of space if I lower the table, so I was wondering
> about adapting the gadgetry to be attached to the bottom of the
> spindle. I can use an R8 collet, but also have an R8 to Erickson 30
> quick change adaptor. I have an Erickson 200DA collet holder which
> is missing the nut, so I don't mind modifying it to hold a grinder.
> I don't think I have enough room to verticle mount a straight die
> grinder (and it probably would have a tendancy to flex) which is why
> I was looking at using an angle grinder.
>
> Anyone ever do it this way. Any other ideas?
>
> Thanks and regards,
> Jeff
>
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