FILENAMES:

id_grinder 1.jpg
id_grinder 2.jpg
id_grinder 3.jpg

DESCRIPTION:

These are pictures of a homemade ID grinder setup. Posted by 
Terry Keeley <tkee@sympatico.ca>. Terry provided the following 
description:

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The following three pictures show an id grinder I built with a lot 
of help from a tool maker friend and the good folks at rcm.

Pic 1 shows the Emco Compact 5 which was fitted with Class 7 Barden 
sindle bearings and mounted to a 2" ground steel base.  The NSK 
Falcon G-1 reciprocating grinder is mounted to a cast iron cross-slide 
that can be adjusted to vary the angle of the grinding unit.  The 
precision Universal lead screw was found on rcm, and can move the 
unit fractions of a tenth.  Coolant feed and drains are also seen.

Pic 2 shows the blank end arbors that were used to hold the model 
cylinder sleeves for grinding.  Seals for the spindle bearings and 
the coolant tray are also shown.

Pic 3 gives better detail of the cross-slide, coolant stem and the 
spindle.

I built this unit mainly to grind the chrome on the sleeves of my 
model race boat engines but already have other jobs planned.  I've 
been able to obtain roundness to 25 millionths (1/4 of one tenth), 
and straightness to twice that, as read on my Mitutoyo bore guage:)

Thanks again to all the folks at rcm!

Terry Keeley

If you always do what you always did,
you'll always get what you always got...