Collet Chuck Assembly Instruction - Optimum Optiturn TU 2506VB Betriebsanleitung

3.10.3 Collet chuck assembly instruction

Mounting the collet chuck 3441305 on your lathe.
Proceed as follows.

Before dismantling, mark the position
of the lathe chuck on the spindle
flange with e.g. a felt pen. This ena-
bles an identical reassembly.

Disassemble the lathe chuck.

Clean all surfaces of the spindle nose
and collet chuck extremely thoroughly.

Remove the grub screws from the
lathe chuck and screw the grub screws
into the collet chuck.

Measure the runout of the spindle
flange. Mark the largest positive
deflection of the dial gauge on the
spindle flange with a felt pen.

Attach the collet chuck to the spindle
flange, tighten the nuts slightly.
Tighten the nuts gradually and evenly
alternately at least three times in a row
(this is the only way to achieve the
best concentricity).

Measure the run-out of the collet chuck
in the taper surface.

Position the collet chuck by turning
each 120° on the spindle flange until
the highest concentricity is achieved.

Mark the position of the highest con-
centricity of spindle flange with collet
chuck and then mount the collet chuck
in this best position.
Version 1.0 - 2020-12-22
Spindle flange
(Short tapered seat)
Measuring position
Grub screw
Measuring posi-
tion
Img.3-4: Collet chuck 3441305 shown without union nut.
Translation of original instruction
TU2506VB EN
109