Hc-300 - RIDGID HC-450 Operator's Manual

HC-450/HC-300 Hole Cutting Tools
location of the cut. Make sure the chain is not be-
tween the pipe and tool base.
3. Always keep at least one hand on the Hole Cutting
Tool to stabilize and guide it. Grasp the end of the
chain and pull it snugly around the pipe. Hook the
closest chain pin on the wear plate and firmly tighten
the swivel handle to hold the Hole Cutting Tool to the
pipe. (See Figure 5)
Wear Plate
Chain
Figure 5 – Hooking the HC-450 Chain
4. The base of the HC-450 Hole Cutting Tool includes a
level vial that can be used to align a series of holes.
When the Hole Cutting Tool is placed at the desired
angle, the vial can be rotated to the level position,
and subsequent holes can be made at the same
angle by leveling the Hole Cutting Tool with the vial.
(See Figure 6)
Figure 6 – HC-450 Hole Cutting Tool Level Vial
8
5. With one hand on the Hole Cutting Tool to stabilize and
guide it, slightly loosen the swivel handle to allow final
positioning of the tool. Align the pilot drill with the de-
sired cut location, and firmly tighten the swivel handle.
Do not remove your hands from the Hole Cutting Tool
until you have confirmed that it is securely attached to
the pipe. The Hole Cutting Tool must be securely and
squarely attached to the pipe to help reduce the risk of
hole saw jamming.

HC-300

The HC-300 can be mounted on the pipe either as a
complete unit (similar to the HC-450) or by separating the
base assembly from the tool, mounting the base to the
pipe, and then installing the motor assembly to the base
assembly.
1. With the HC-300 Hole Cutting Tool on a stable, secure
surface, pull the plunger on the back of the left post
(Figure 7) and lift the motor assembly off of the base
assembly.
Figure 7 – Separating the Base and Motor Assemblies
2. Make sure the chain is hanging freely and the swivel
handle is fully loosened on the base assembly.
3. Place the base assembly with the V-shaped guides
squarely on the pipe near the location of the cut.
Make sure the chain is not between the pipe and tool
base.
4. Always keep at least one hand on the base assembly
to stabilize and guide it. Grasp the end of the chain and
pull it snugly around the pipe. As you pull on the
chain, a spring is compressed at the attachment end of
the chain. Hook the closest chain pin on the chain hook
– the spring tension will help keep the chain engaged
with the chain hook. Firmly tighten the crank screw as-
sembly to hold the base assembly to the pipe. (See
Figure 8.)
Plunger Pin