BEVELER INSERTS
The BM-20 milling spindle is equipped with two milling head insert rings, each holding six BMJBEV1 cermet inserts, for
a total of 12 inserts. The operator should routinely inspect the inserts for excessive wear or damage. Excessive machine
vibration or poor bevel finish may indicate the inserts should be rotated or replaced. Before replacing inserts, make sure
that all four edges of each insert have been used. When rotating inserts, all 12 inserts should be rotated at the same time
to eliminate the possibility of chatter on the work piece.
CHANGING THE BEVELER INSERTS
With machine disconnected from power source, remove milling head housing (item #7) by removing two handles located
on side of milling head housing sides (item #11). With milling head spindle and inserts exposed, remove each insert
using supplied 3mm allen wrench by loosening screw (item #27) holding each insert. At this point, the insert rings should
be clean and free of debris. When placing the inserts into the insert ring, be sure that each insert is pushed as far back
into the pocket as possible. NOTE: Using a feeler gauge, inserts must be set .004 inches from opposite insert ring shoulder.
Each insert should be snugged with provided 3mm hex driver and then torqued to 65 inch pounds with the provided
preset torque wrench. When torque wrench reaches 65 inch pounds, it will click. Stop immediately after hearing a click.
Each additional click will tighten the screws unnecessarily. NOTE: Use anti-seize lubricant on set screws for easy removal.
CAUTION!
WHEN REMOVING OR INSTALLING INSERTS, USE CAUTION TO PROTECT HANDS FROM CHIPS AND SHARP EDGES.
MAKING THE BEVEL CUT
Connect the BM-20 to grounded power source. If using an extension cord, check voltage at cord ends to ensure you
will not be operating the BM-20 on a voltage drop. Route power cord so that it will not interfere with the operator or
workpiece. Place the BM-20 on horizontal slide at the right edge of the work surface. Do not touch the milling head to
the edge to be cut at this time. Move rocker switch located on control panel to the lit position. Start the BM-20 by
depressing the push button switch marked “I”. To stop the BM-20, simply depress the push button “O”. Place right hand
on loop handle and left hand on front guide handle. Using right side of guide as a fulcrum, slowly pivot left side into
workpiece until entire guide is flush with the material to be beveled. Slide the BM-20 slowly to the left. The direction of
feed is marked on the milling head housing. NOTE: Remember the rate of feed is determined by the width of cut and
the material being beveled.
If the operator attempts to bevel too fast or too much material, the built-in overload indicator (item #35) will begin to
illuminate. Reduce the feed pressure at this time. If the motor load is not reduced, the machine will shut off to protect the
motor. If this occurs, move the BM-20 away from the beveled edge before attempting to restart.
Restart the BM-20 by depressing “O” (item #41). Wait 30 seconds and depress the “I” (item #41). NOTE: Continuous
operation with the overload indicator illuminated may cause permanent motor damage. The BM-20 is designed to operate
under normal conditions for one hour. To maintain the motor, allow a 15 minute cool down period after each one hour
duration of use. Simply shut off and disconnect the machine from power source.
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