GRESSEL AG Centros Instructions De Service page 20

100
110
330
140
150
110
90
20
Use of Accessories
– Differential Clamping Screw, for clamping unfinished parts.
Both four-point clamping and three-point clamping are possible.
Warning: three-point clamping may displace the centre of round
work pieces.
If the centre must be maintained, then four-point clamping must
be used instead.
– Tighten the differential clamping screw for the corresponding
threads M12 of the slide jaw 20 until the stop threads,
Torque 90Nm
– 5-face Reversible Jaws, with 5 clamping zones.
Fixed in place using a differential clamping screw. Screw the
differential clamping screw for the corresponding M12 threads of
the slide jaw 20 in until it is ca. 2 mm before the stop threads.
Screw the 5-face reversible jaws out towards the support, and
pre-arrange the position by gently pre-stressing the work pieces.
– Attach the differential clamping screw tightly. To prevent the work
piece moving laterally during milling work, a stop is required,
particularly for three-point clamping and cubic work pieces
(for example, a work piece stop from the GRESSEL Standard
Program)
Reduce Bearing Play
If bearing play becomes too great, it can be reduced at any time.
– Remove the knurled handle 130, protective bushing 120 and the
adjusting bushing 110.
120
130
– Loosen both threaded screws 330.
– Tighten the threaded bushing bearing 100 by turning clockwise,
but do not apply too much force. Try setting it several times by
feel. Use a Seeger ring to help. Contact in existing holes ø4 mm.
– Tighten both threaded screws 330 alternately, max. Md 5 Nm.
Readjust Centre Position
For deviations in relation to the transverse slot in the base or where
several vices are used side by side, the centre can be adjusted.
First, the bearing play must be set correctly as described above.
– Centring pin 140 und clamping screw 150 must be operative in
accordance with the procedure described on page 3.
– Arrange the adjusting bushing 110 in such a way that two
threaded screws 340 are in contact with the slots of the bearing
bushing 90. Two of the threaded screws are loose and not used.
– Using flat wrench, SW30 adjust the centre by turning clockwise
and anti-clockwise.
– Adjust bushing 110, loosen both 340 threaded screws that are
being used. Adjust bushing 110 without turning the bearing
340
bushing 90, so that the four threaded screws 340 are clamped
as shown.
– Secure the four threaded screws 340 increasingly tightly as you
go across, up to the max. of Md 8 Nm
– Set the protective bushing 120 and knurled handle 130 so as to
ensure limited play.
Note: If set correctly, the spindle should move «quickly» and
«around».