Torques per screw
28
03.00|1341130_ROTA NCR-A |en
Grades of Accuracy
Tolerances for run-out accuracy and axial run-out accuracy
correspond to the Technical Supply Terms for lathe chucks as per
DIN ISO 3089.
Permissible imbalance
The ROTA NCR in ungreased state without chuck jaws corresponds
to the balancing quality class 6.3 (according to DIN ISO 21940-11).
Residual imbalance risks may arise due to insufficient rotation
compensation being achieved (see DIN EN 1550 6.2 e). This applies
particularly to high speeds, asymmetrical workpieces or the use of
various chuck jaws, as well as uneven application of lubricants. In
order to prevent damage resulting from these residual risks, the
entire rotor is to be dynamically balanced in accordance with DIN
ISO 21940-11.
Torques per screw
Tightening torques for mounting screws used to clamp the chuck
on lathes or other suitable technical equipment
(screw quality
10.9)
Screw size
M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30
Admissible torque
M
A
(Nm)
13
28
50
88
120 160 200 290 400 500 1050 1500
Tightening torques for mounting screws used to attach top jaws
onto the chuck
(screw quality 12.9)
Screw size
M6
M8
M10 M12 M14 M16 M20 M24
Max. admissible torque M
A
(Nm) 16
30
50
70
130
150
220
450
3.4
3.5
4
