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Ridge Tool Company • Elyria, Ohio • U.S.A.
5
Inspect Hole Cutting Tool
WARNING
To prevent serious injury, inspect your Hole
Cutting Tool on a regular basis. The following
inspection procedures should be performed
before each use of the tool:
1. Inspect the power cord and plug for damage. If the
grounding prong is missing or the cord or GFCI is
damaged, do not use the tool until the cord has
been replaced.
2. Make sure the switches turn the tool ON and OFF.
If broken, do not use until they are replaced.
3. Inspect the power drive for any broken, missing,
misaligned, or binding parts as well as any condi-
tions, which may affect the safe and normal opera-
tion of the tool. If any of these conditions are
HC-450/HC-300 Hole Cutting Tools
Figure 2 – Dimension B
Figure 3 – HC-450 with Standard Equipment
B
present, do not use the tool until the problem has
been repaired. Do not use dull, bent, or damaged
hole saws or arbors.
4. Test the Ground Fault Circuit Interrupter (GFCI) to
insure it is operating correctly. When test button is
pushed in, the indicator light should go OFF.
Reactivate by pushing the reset button in. If the indi-
cator light goes ON, the tool is ready to use. If bro-
ken, do not use the tool until it is replaced.
5. Clean any oil, grease, or dirt from the handles.
This reduces the risk of injury due to the tool slip-
ping from your grip.
6. Use only accessories recommended for your tool.
Accessories used for other tools may be haz-
ardous when used on a hole saw and lead to seri-
ous injury.
7. Inspect the cutting edges of your hole saws. If nec-
essary, replace prior to using in your hole-cutting
tool. Dull or damaged cutting edges can lead to
injury, tool breakage, or excessive heat buildup in
the workpiece and the tool.
Set-Up Instructions
Model HC-450
WARNING
When setting up the hole saw, it should be
unplugged and the switch should be in the OFF
position. To prevent serious injury the tool must
be properly set up.
1. Determine the size and location of hole to be cut.
Follow coupling manufacturer’s recommendations
for hole size to coupling size.
2. Select hole saw and arbor to correct hole size.
Integral arbor hole saws are recommended to
reduce chatter. See Table 1 for ordering information.
Hole Saw Ordering Information – Table #1
Hole Diameter
Hole Arbor Integral
Saw Cat. Saw
Inches mm Cat. No. No. w/Arbor
2 51 52865 53080 56902
2
1
/
2
64 52895 53080 56907
2
3
/
4
70 52910 53080 56912
3
1
/
2
89 52940 59502 56917
4
1
/
2
114 52980 59502 56922
NOTE! 53080 Arbor is
5
/
8
″ Hex; requires
5
/
8
″ Chuck.
59502 Arbor and backing plate is for hole saws
larger than 3″.