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Boucher
01-29-2012, 04:08 PM
Making a dial indicator holder for your lathe.

Select a suitable piece of Aluminum or steel. This is what we are going to make.
http://i109.photobucket.com/albums/n50/boucherbyron/IMG_0251Small.jpg

Use the headstock to drill the hole for the dial indicator stem and it will be right on the centerline.
http://i109.photobucket.com/albums/n50/boucherbyron/IMG_0249Small.jpg
The rest of the dimensions are determined by your particular lathe size. This is just a T-Block that fits your compound with a couple of lock screws to hold it in place and the indicator on center with out having to fiddle with it.

Boucher
01-29-2012, 04:12 PM
Install the test bar between centers with the turned end nearest to the headstock as shown.
http://i109.photobucket.com/albums/n50/boucherbyron/IMG_0253Small.jpg
Move the cross slide to compress the indicator approximately .100 then zero the dial. Reverse the test bar to put the trued section nearer the tailstock. Run the carriage down to put the indicator on the trued area. I just pull the stem back a little while the carriage is being moved then release it. In this case my tailstock shows to be out .002
http://i109.photobucket.com/albums/n50/boucherbyron/IMG_0254Small.jpg
Two things to consider.
1. If the tailstock has been off-set a significant amount get it back close before making the first zero or do the reversal a couple of times.
2. Make a renewable center to go in your chuck. It is quicker and easier to take a light truing cut than to change the chuck to turn between centers.

Chris165
01-29-2012, 06:06 PM
Thanks for posting this. I'm sure this will be a handy addition to my lathe.