Harbor Freight Tools 40939 - Operational Controls and Head Adjustments; Motor and Belt Speed Adjustment; Quill Lock and Vertical Feed Operation; Quill Clutch and Feed Selection

Item 40939 For technical questions, please call 1-888-866-5797. Page 8
MOUNTING MOTOR AND SHIFTING BELTS FOR VARIABLE SPEEDS:
The motor is mounted on a plate hinged to the pulley housing. Release the belt
set unit by turning the handle at the side of the motor. Then shift the belts to the proper
speed as desired. Then tighten the belt set unit. A speed change chart is attached inside
the pulley cover.
QUILL LOCK AND VERTICAL FEED:
The handle at the right lower corner of the head is the quill lock. When vertical
feed is not in use, set the handle to lock the quill and make the head more stable. The
micrometer depth stop is graduated in inches. By utilizing these simple graduations, it is
possible to work very accurately to different depths. A lock nut under the micrometer nut
assures that the micrometer nut is secured properly.
QUILL CLUTCH OF VERTICAL MILLING HEAD:
The vertical feed is controlled by a hand wheel at the front of the head and a
handle at the right side of the head. When the hand wheel is in use, tighten the clutch
lock nut by hand, or loosen it for handle operation. Use the hand wheel for fine feeds, or
the handle for fast feeds.
VERTICAL HEAD AND TEE ADAPTER:
The vertical milling head can be tilted 90
o
on each side by loosening the four
locking bolts on the TEE adapter. By loosening the two set bolts on the adapter, the
vertical milling head can then be swivelled 120
O
; tighten the set bolts after swiveling.
The motor and milling head must tilt together since the motor and head are suspended
on the same pulley housing.