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Ridge Tool Company • Elyria, Ohio • U.S.A.
10
5. For two-piece mounting, separate the base from
the motor assembly by lifting the motor while
pulling the plunger (Figure 13) located in rear of the
left post (front view). When lifting the motor assem-
bly, use the handle.
6. Make sure there is adequate clearance to mount
and position the HC-300.
WARNING
When cutting into an existing system, the pipe
must be drained and depressurized. Do not use
in the presence of flammable gas, vapor or dust.
7. Mount the base in the proximity of the place to be
cut. To do so, place the base on top of the work-
piece. The front edge of the base is 1
9
/
16
″ inches
from the chuck centerline. (Figure 14)
8. Turn crank handle fully counterclockwise to make
sure the hook is completely lowered and aligned
with the mark in casting.
9. Hook the chain into the base latch.To do so, pull
the chain slightly to compress the spring mecha-
nism. Once the chain is latched into hook, the
spring tension keeps the chain engaged. Use the
screw mechanism to fully tighten the chain.
(Figures 15 & 16)
NOTE! Completely lower hook until it reaches the cast-
ing marks. Failure to do so will result in inade-
quate travel to properly tension the chain.
NOTE! If the hole location is on the bottom or side of
the pipe, rotate the HC-300 to the desired loca-
tion before tightening the swivel handle.The unit
is designed to drill in any position.
HC-450/HC-300 Hole Cutting Tools
Figure 13 – Model HC-300 Plunger
Figure 14 – HC-300 Chuck Centerline
Figure 15 – Hooking the Chain
1
9
/
16
″
40mm