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3. Place HC-450 on a bench or ground to install hole
saw and arbor into drill chuck.
4. The
1
/
4
″ pilot drill is recommended for pipe that is
installed. If pilot is used make sure it is tight in
arbor and exposed no more than
3
/
8
″.
NOTE! Pilot drills are recommended when cutting holes
in installed systems.
5. Ensure chain assembly and swivel handle are in
working order and free to move.
6. Make sure there is adequate clearance to mount
and position the HC-450.
WARNING
When cutting into an existing system, the pipe
must be drained and depressurized. Do not use in
the presence of flammable liquids, vapors or dust.
7. Lift HC-450 using front and rear carrying handles.
Rear handle can be used for a rope and pulley sys-
tem when working on existing overhead pipe. (See
Figure 4.) Do not lift HC-450 above your shoulder.
(Figure 5)
8. Mount unit in the proximity to hole location.
NOTE! If hole location is on the bottom or sides of pipe,
place unit on top of pipe. Put chain around pipe
and place chain pins into base latch. (See Figure 6.)
WARNING
To prevent cord damage and electrical shock
position electrical cord away from the base of the
tool.
9. Fully tighten chain when pilot drill or saw is over the
hole location. To move unit, loosen chain swivel
handle half a rotation and slide or rotate unit.
Ridge Tool Company • Elyria, Ohio • U.S.A.
6
HC-450/HC-300 Hole Cutting Tools
Figure 4 – Carrying the HC-450
Figure 6 – HC-450 Base Latch
Figure 5 – DO NOT lift HC-450 above your shoulders.
May result in loss of balance.
Base Chain
Latch