Fasten Workpiece Holder; Lathe Chuck - Optimum OPTiturn TH 3309 Betriebsanleitung

4.13.1 Fasten workpiece holder


Fasten the workpiece holder by turning the clamping bolts clockwise.
The right clamp position is reached when the reference marker at the clamp holder are between
the two marks at the lead spindle seat.
The tightening torque must be approximately 80 Nm, otherwise the rotational accuracy of the
lathe chuck is not present. 100 Nm is about the torque used for aluminum rims on cars.
Marking clamp bolt
V
"Open position"
Adjusting the Camlock bolts to the workpiece holder

Detach the safety screw.

Turn the Camlock bolt by one complete
revolution
in or out, according to the correction nec-
essary.

Mount the safety screw
INFORMATION
The reference mark on each Camlock bolt
serves as orientation for the correct adjust-
ment.

4.13.2 Lathe chuck

During turning, the workpiece is subject to cutting forces, weight forces and unbalance forces
which have to be absorbed by a sufficiently strong clamping force. Massive workpieces with
higher degrees of stiffness lead to a considerable loss of clamping force. This loss of clamping
force is lower for thin-walled, distortion-sensitive workpieces with less stiffness.
The maximum rotational speed of a lathe chuck may only be applied at maximum actuating
force and with perfectly working chucks.
Lathe chucks must be designed for the maximum rotational speed of the machine, the permissi-
ble lathe chuck speed with respective jaws and/or top jaws, as well as the maximum measured
static clamping force at maximum introduced force must be specified in the operating instruc-
tions for the lathe chuck or be indicated on the lathe chuck itself. Replacement lathe chucks
must comply with EN 1550 standards. The minimum distance to the machine bed must not be
less than 25 mm.
WARNING!
Do not clamp any workpieces that exceed the permitted chucking capacity of the lathe
chuck. The clamping force of the chuck is too low if its capacity is being exceeded. The
clamping jaws may loosen.
Only use lathe chucks designed for the speed of the machine.
Do not use lathe chucks with an external diameter that is too large.
Please ensure that lathe chucks are manufactured to EN 1550 standards.
EN
TH3309 | TH3309D
110
Img.4-7: Marking clamp bolt
Translation of original instruction
Marking clamp bolt
V
"Closed position"
Reference
mark
Camlock
Bolt
Lock screw
Img.4-8: Camlock seat
Version 1.1.0 - 2020-08-06