# Preparation for the spindles 4141 0253 XX

Using this spindle, you can define your own thread size.

Before you make preparations for the spindle, read the following instructions:

1. Remove the rings from the spindle.

2. Insert the spindle in a collet chuck with Ø16 mm.

3. Clamp the collet chuck over the spindle thread. The thread should not stick out more than (L1). See figure below.

4. Note the dimension of the drilling depth (L2) and the thread size (L3). See figure below.