We have had quite a few requests to make a Spindle Square for the world market that works with Metric collets and reads in native units. We have built a new spindle square just for this that offers all of the same adjustments but fits this world market demand.
The spindle square is adjustable with 8mm holes for 75 – 150mm. It can be used to tram on multiple vise sizes, and machines such as your mill, drill press, sine bar and lathe. You can use any indicator with a 8mm stem so you can install a brand or resolution of your preference. The hardware will never rust and shouldn’t damage your indicator unless you over-torque the thumbscrew.
Keith Rucker over at VintageMachinery.org did a wonderful overview of the product and how to use this exact model on your milling machine to align the spindle to your table.
Randy Richard in the Shop has also done a great overview using this Spindle Square to square his mill table utilizing an outside reference.
Spindle Square Only $45
Spindle Square with .01mm Indicators & Case $99
Spindle Squares are shipped via the United States Postal Service in either first class or flat rate padded envelopes/boxes. They are shipped bare tool with indicators packed in original foam padding and white boxes.