ROHM KFD-HS - Power chucks with through-hole - Manual (Page 12)

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3. Mounting the chuck on the machine spindle
1. Mounting the chuck on the machine spindle
1.1 Check spindle nose or mounted, finish-machined
adapter plate for radial and axial run-out (permissible
tolerance 0,005 mm to DIN 6386 and ISO 3089).
1.2 The adapter plate must be designed so that the
chuck makes full contact with the plate face.
The plate or spindle face must be perfectly flat.
2. Mounting size 110-200 chucks
2.1 Move draw tube to extreme forward position
2.2 Pull piston 3 in chuck to rearward positon (jaws in
innermost position).
2.3 Remove screw-plug 21 at front of chuck and push
chuck mounting screws 11 in as far as they will go.
2.4 Screw power chuck on draw tube as far as it will go.
(Make sure that the draw tube screw thread is pro-
perly aligned).
2.5 Back off chuck until bore and positioning nut of
spindle nose coincide.
2.6 Put chuck against spindle nose and alternately tigh-
ten the chuck mounting screws 11 (see Fig. 1).
2.7 Check minimum dimension”X” see page 3 and
correct it by turning the chuck on the draw tube
(after separating the chuck form the spindle nose).
2.8 Check operation, jaw travel and amount of actuating
force required.
2.9 Srew 21 in screw plugs and check chuck for radial
runout and axial slip (at test rim).
3. Mounting size 250-500 chucks
3.1 Move draw tube to extrerme forward position.
3.2 Push piston 3 in chuck to forward position (jaws in
outermost position).
3.3 If necessary, remove screw plugs 21 at front of
chuck and push chuck mounting screws 11 inward
(see Fig. 1).
3.4 Using the rotatable threaded bush 7, screw chuck
onto draw tube as gar as it will go.
3.5 Alternately tighten the chuck mounting screws 11
(see Fig 1).
3.6 Check minimum dimension “X” see page 3 and
correct it by turning the treaded bush 7 if necessary.
3.7 Check operation, jaw travel and amount of actuating
force required.
3.8 Screw 21 in screw plugs and check chuck for radial
runout and axial slip (at test rim).
To remove the chuck from the spindel, reverse the
procedure described above.
4. Maintenance
1. To maintain its reliability and
high quality, the chuck must
be lubricated at the grease
nipples at regular intervals
(see illustration).
After lubrication, move the
clamping piston several times
over its full stroke in order to
distribute the grease more
evenly. Then lubricate again.
2. Performance and clamping force must be checked
after some time, depending on the conditions of use.
The most reliable method of measuring the clamping
force is by means of a load cell.
3. Performance check: The clamping piston must
move when the lowest possible actuating pressure of
3-4 bar is applied. However, this method is not relia-
ble enough to serve as a substitute for the clamping
force measurement.
If the clamping force has dropped substantially or
if the clamping piston can no longer be moved with
ease, the chuck must be disassembled, cleaned
and relubricated.
4. Maintenance intervals: Depending on the conditions
of use, but not later than after the specified periods.
We recommend our special grease F 80.
Lubricate all lubricating points
every 20 hours of operation
heavy soling every 8 hours.
Disassemble the chuck and clean all parts
every 2000-3000 hours of operation.
1. Remove mounting screws 12 and 13.
2. Jack off adapter plate.
3. Remove piston.
4. Unscrew all retaining screws 15 in the base jaws 2.
5. Pull out base jaws 2. 6. To reassemble the chuck, reverse the above proce-
dure (making sure that the base jaws and the piston
are properly numbered and positioned).
Take care to avoid damage to the sealing cord 25
when pushing the base jaws into the chuck body.
5. Disassembly and assembly of 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
(see page 3). -- The Ident. No. will be found on the face of the chuck.
Fig. 1
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