Thanks Cheeseking - looks like my taper attachment is completely different - It is an Atlas Clausing model - not a Colchester. I'll post some pics as I work through it.
Well I got the spacer for the QCTP made and installed - should work fine.
My next step was to figure out what is going on with the cross slide play - I can move it about an 1/8" forward and back. I'm going to have to take it apart and see what is going on I think but before I did that I wanted to attack another project.
I wanted to install a cross slide threading stop but they are hard to come by. I decided I would buy one for a SB heavy 10 knowing it was not wide enough to fit the Clausing cross slide. I need to widen the dovetail in the stop and then drill and tap a hole in the cross slide. It seemed I should get this done before disassembling the cross slide because I would need to take it apart anyway for drilling and tapping.
Here's the stop I bought
And its fit to the cross slide - there are two pins in the small section. In a perfect world the pins should touch the main body at the same time as the dove tail faces make contact. This is obviously not the case - yet. Also the hole for the cross slide attachment bolt should be centered on the cross slide. Again - not the case.
After some measurement I figured I needed to remove just under 1/4" from each side of the dovetail. I should note that I had a lot of guidance from a member of another forum (thanks Jeff). Based on his advice I decided to use a standard end mill to remove the bulk of the waste.
Then I used a 1" 60 degree dovetail cutter to reform the dovetail. I ran the Bridgeport in back gear at about 300 RPM and manually fed VERY slowly. Depth of cut was roughly .020". The milling went without incident except for me figuring out the correct feed direction - I had a second or two of back cutting (sorry Jeff - I know you warned me
) which was not pretty but I got that figured out pretty quickly.
Here's the cross slide fit after completeing the first dovetail - you can see the gap is significantly reduced and the hole is roughly centered on the cross slide. Actually the hole is about 1/16" off - I didn't realizt that the dovetail cutter was not tall enough and was leaving a small ledge at the top of the dovetail. It was easy to file that off but by the time I discovered it I had gone too far.
I then proceeded to the small adjustable section and basically proceeded the same way except I didn't do the waste removal step but went right to the dovetail cutter.
And the fit with both dovetails milled - both oins and the dovetail faces are touching
I locked the stop in place and used a transfer punch to mark the cross slide hole position and after applying some layout dye, marked the hole
Now I need to remove the cross slide and compound and drill/tap the attachment hole. Then I can move ointo figuring out my cross slide slop problem.
Rick