BUT

There is a way to do it on the SB.?

The back gears can be used as (Limited) indexing. Some multiples of 3 and 2 are available.?

As I remember there are 24 different positions. You do need to approximately mark the spots first and if using a multiple of 3, you need to start on the correct indexing position.?

You also need a cross drilling fixture.?

Shown above I am drilling 4 holes on a bolt circle. The work is held in the spindle and indexed and locked using the back gears.?

Drilling is done by a shop made cross drilling fixture that works on the QCTP.

Here is what I used.?

The chuck was scrap. the rod is ground. Bearing needs a flange to handle the thrust.?

I later added a rear bearing. .?

An external drill provides the power.?