Issue 4
Original version
March 2010
6
[3] OPERATING INSTRUCTIONS
Before connecting the hydraulic supply ensure the motor switch is in the
OFF
position.
Locate the machine in the required position for cutting the hole and activate the magnet by means of the
ratchet handle (clockwise viewed from rear). Ensure that magnet rod is fully screwed home.
Keep the inside of the cutter clear of swarf -‐ it restricts the operating depth of the cutter.
Apply the cutting fluid to the reservoir via the inducement slots in the arbor. It is then «metered» out by the
pilot and is applied directly to the cutting edge. (Alternatively, fluid can be applied directly on to the work
piece making certain that it floods into the groove formed by the cutter.)
Depress the pilot to ensure cutting fluid is being correctly metered.
Start the motor by turning the rotary valve to
ON
position
Apply light pressure when commencing to cut a hole until the cutter is introduced into the work surface.
Pressure can then be increased sufficiently to load the motor. Excessive pressure is undesirable when using the
Rotabroach™ hydraulic
machine, it does not increase the speed of penetration and may cause the motor to
stall. The motor will restart when the excessive pressure is released.
Always ensure that the slug has been ejected from the previous hole before commencing to cut the next.
If the slug sticks in the cutter, move the machine to a flat surface, switch on the magnet and gently bring the
cutter down to make contact with the surface. This will usually straighten a cocked slug and allow it to eject
normally.
Apply a small amount of light oil lubricant regularly to slide and arbor support bearing. Cutter breakage is
usually caused by insecure anchorage, a loosely fitting slide or a worn bearing in the arbor support.
If the slug sticks in the cutter, move the machine to a flat surface, switch on the magnet and gently bring the
cutter down to make contact with the surface. This will usually straighten a cocked slug and allow it to eject
normally.
Apply a small amount of light oil lubricant regularly to slide and arbor support bearing. Cutter breakage is
usually caused by insecure anchorage, a loosely fitting slide or a worn bearing in the arbor support. (Refer to
routine maintenance instructions.)
