ROHM ZFM - Power-operated draw bar chucks - Manual (Page 9)

3. Mounting the chuck on the machine spindle
1. Mounting the chuck on the machine spindle
1.1 Check the concentricity and axial run-out of the ma-
chine spindle nose or the completed flange for
chucks on the machine (DIN 6386 part 1 and ISO
3089 = 0.005 mm).
1.2 The flange must be configured so the chuck can re-
liably make contact with the screw–on surface. The
screw–on surface must be absolutely flat.
1.3 Place the chuck on the flange and attach it, tightening
the bolts diagonally across. (Piston must be in the
most forward position.)
1.4 Check the attached chuck for concentricity and axial
run-out at the checking edge.
1.5 Move the piston of the clamping cylinder to the most
forward position.
1.6 Screw the two–hole nut onto the tension tube until
the nut is in contact with the chuck piston. Continue
screwing on the nut until the chuck piston has moved
by 1 mm. This means forward contact is sure to take
place in the cylinder.
1.7 Exert a low level of clamping pressure to move the
piston into the back position.
1.8 Screw in the threaded ring and lock it with the two–
hole nut. Then tighten the set screw.
1.9 Check the jaw stroke, function and the level of the
actuation force. The chuck is removed by working
through these steps in reverse order. Removing the
chuck is carried out in the reverse order.
4. Maintenance
1. The high quality and reliable
function of the chuck can be
maintained by regular lubrica-
tion. Grease nipples are provi-
ded for this purpose.
2. Use a grease gun to press a few strokes of grease
through the grease nipples into the clamping pins.
Operate the piston through its full stroke several ti-
mes when doing this. Only use acid–free, non-gum-
ming grease.
3. The chuck should be lubricated once a week.
4.Function test “clamping force”:
Jaws must still move at a smallest possible operating
pressure of approx. 3-4 bar. As this is not an exact
method it is the best to measure the clamping force
with a load-sensing device.
If clamping force dropped too much or the chuck can-
not be moved perfectly it has to be disassembled,
cleaned and relubricated.
We recommend our special grease F 80.
Disassemble the chuck and clean all parts
every 2000-3000 hours of operation.
1. Unscrew the key from the sliding sleeve.
2. Pull the sliding sleeve out to the front together with
the clamping pins.
Clean, check an thoroughly coat all parts with
Röhm grease F 80.
3. The chuck is assembled by working through these
steps in reverse order.
5. Dismantling and assembling the chuck
6. Spare parts
When ordering spare parts, please quote the
Ident. No. of the chuck and the item number or
designation of the desired part. The Ident. No. will
be found on the face of the chuck.
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