Hougen HMD500, Operator'S Manual

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Always remember that the magnet's holding power is directly
related to the workpiece thickness and surface condition.
Since magnetic attraction diminishes with thinner material or
rough surfaces, mechanical clamping of drill unit to the
workpiece should be used when cutting thin material (3/8" or
less) or material with uneven surfaces.
Note: Always form a loose knot in the power cord close to
the molded plug. This prevents cutting fluid from running
down the cord and into power receptacle.
1. Make sure workpiece and bottom of magnet are free of
chips, oil, etc.
2. Secure unit to workpiece with safety chain.
3. Position drill by sliding it and gently feeding Arbor so that
pilot point is touching center of hole to be drilled.
4. Turn magnet ON by pressing the MAGNET ON button.
5. Select the proper RPM for the cutter diameter you are
using. Use the 450 setting for 7/16” thru 1-1/16” diameter
and use the 250 setting for 1-1/8” thru 2-3/8” diameters.
Note: The RPM settings for the diameter ranges are to be
used as starting points only. Setting may vary per application.
6. Turn Feed Handle, raising the cutter until the pilot is
above the work surface.
7. Open the cutting fluid bottle valve.
USE OF SAFETY CHAIN
The safety chain should be used to prevent the drill unit from
falling in the event of a power failure or if the magnet breaks
loose from the work surface. The safety chain should be
attached to the drill by running it through the “D” ring located
at the rear of the magnet, and tightly secured.
OPERATING INSTRUCTIONS
8. Make certain that cutter is clear of workpiece and turn
motor ON by pressing the MOTOR ON button.
9. Feed Rotabroach Cutter slowly into workpiece. Only
after cutting path is established to a depth of about 1/16"
can full force be applied to feed handles.
10. Ease up on feed pressure as cutter starts breaking
through.
11. At conclusion of cut, turn motor OFF by pressing motor
STOP button. Turn Feed Handles to raise Arbor thereby
ejecting the slug if it hasn't already fallen free.
12. Close the cutting fluid bottle valve.
13. Turn magnet OFF by pressing the magnet OFF button.
As the magnet de-energizes, the rear of the magnet
should lift up off the work surface.
14. Disconnect from power source.
15. If necessary, remove chips from cutter and magnet,
preferably wearing leather work gloves and/or with pliers.
16. Disconnect safety chain and you are ready to move unit
to new drilling position.
Special Instructions for Horizontal or Overhead Operation
1. Always Use Safety Chain.
2. Use grease or animal-fat base solid lubricant applied
liberally to cutter.
3. For horizontal use, apply cutting fluid to external parts of
cutter with plastic bottle or oiling can, or use the optional
pressurized coolant bottle assembly (P/N 24140).
“D” Ring
For 1-1/8” thru 2-3/8”
For 7/16” thru 1-1/16”