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RLL233 Issue 4 Aug 2007
5
SPEED SELECTION
The machine is equipped with two speed ranges, High, and Low, and a stepless variation of
each range.
The speed range is changed by the rotary change switch located on the gearbox side. Do not
change gear while the motor is in motion.
The stepless variation is adjusted by rotating the disk located on top of the motor. The disk is
graduated into six numerically designated segments.
Before cutting holes the work piece material specification must be determined to facilitate the
correct cutting speed selection (See section 13 Cutting speeds). Site conditions, eg diameter
and condition of cutter, material condition, material thickness, etc must also be taken into
account when determining the suitable cutting speed. The speed and feed rate must
continuously be monitored and adjusted to ensure optimum cutting conditions prevail.
[4] EXTENSION CABLE SELECTION
The machines are factory fitted with a 3 metre length of cable having three conductors
1.5mm_
LIVE, NEUTRAL and EARTH. If it becomes necessary to fit an extension cable from the
power source, care must be taken in using a cable of adequate capacity. Failure to do so will
result in a loss of traction by the magnet and a reduction of power from the motor.
Assuming a normal AC supply of the correct voltage, it is recommended that the following
extension lengths shall not be exceeded:
For 110v supply: 3.5metres of 3 core x 1.5mm_
For 230v supply: 26metres of 3 core x 1.5mm_ or
17metres of 3 core x 1.0mm_
ALWAYS DISCONNECT THE MACHINE FROM THE POWER SOURCE WHEN
CHANGING CUTTERS.
[5] MOUNTING OF CUTTERS
The machine has been made to accept cutters having 19.05mm (3/4") dia. shanks
The following procedure is to be used when mounting cutters.
Take appropriate pilot and place through hole in shank of cutter. Insert shank of cutter into
3/4" dia. bore of arbor, ensuring alignment of two drive flats with socket screws RD4066.
Tighten both screws using hexagon key.