Operating and Maintenance Manual
©
HOFFMANN MU3-P & MU3-PD
• Version 7.205.00 • 01-2018
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10
Changing Router Bits
ALWAYS DISCONNECT THE ELECTRICAL POWER AND COMPRESSED AIR SUPPLY BEFORE
ATTEMPTING ANY SERVICE, MAINTENANCE OR REPAIR WORK!
Follow
proper “Lock-Out / Tag-Out” procedures as specified by the Occupational Safety and Health
Administration “OSHA” if applicable.
1. Verify that electrical power and compressed air
line have been disconnected
– keep power cord
and air line in your line of sight.
2. Remove the old chip breaker from
the table recess and discard.
3. Loosen the lock-nut (1) and raise the motor
carriage manually by turning the black star knob
(2) on the right side of the motor carriage. Raise
the carriage until the rou
ter bit is approx. 1/4”-3/8”
above the machine table.
4. Loosen the Allen head screw (3) on the underside
of the motor bracket to release the motor.
Carefully slide the motor out toward the back.
5. Use the included open-end wrenches (SW18mm
and SW22mm)
to open the ¼” collet nut and
remove the old router bit.
6. Install new bit and tighten collet securely.
7. Distance (German:
Einstellmaβ
) between tip of router bit and top of collet should be (approximately):
For W-0 router bit: 14.3 mm = 0.563
”
For W-1
router bit: 15.5 mm = 0.610”
For W-
2 router bit: 17.0 mm = 0.669”
For W-
3 router bit: 19.0 mm = 0.749”
For W-4 router bit: 24.2 mm = 0.953
”
When installing a new bit try to get close to the listed dimensions but don’t spend too much time trying
to
get a “perfect” setting. The final adjustment will be made by moving the whole motor in and out – see
next page!
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