RIDGID 920 Operating Manual page 12

920 Roll Groover
Grooving
Position
Figure 16
5. Groove pipe.
6. Check actual groove diameter.
NOTE! Because of the significant variability in pipe
outside diameter, the depth setting gauge will
not be 100% accurate in achieving the required
groove diameter. The actual groove diameter
should be measured with calipers or a PI tape.
Each turn of the adjusting nut will change the
groove diameter by .100".
Forming the Roll Groove
Pipe wall thickness cannot exceed the maxi-
CAUTION
mum wall thickness specified in the "Pipe Maximum and
Minimum Wall Thickness" Table II & III.
1. Flip the directional switch to FORWARD.
The power drive must be run in the FOR-
CAUTION
WARD position to use the stabilizer.
2. Actuate the hand pump until the pressure is approx-
imately 500 psi. The upper groove roll should contact
the pipe and the guards should be in the closed
position.
3. Tighten stabilizer until roll contacts pipe. Continue to
tighten stabilizer one to one and a half turns after con-
tacting the workpiece (Figure 17) .
Keep hands away from grooving rolls,
WARNING
sta b i lizer wheel and end of pipe.
12
Figure 17 – Adjusting Stabilizer
4. Step on the foot switch and apply downward pressure
on the hydraulic pump handle. Allow one full pipe
rotation between quarter strokes of the pump handle.
Use up to 5000 psi of pressure for thin wall pipe
(Schedule 10) and 6000 psi for standard wall pipe or
Schedule 40.
WARNING
5. When the depth adjustment knob contacts the base,
allow two complete pipe revolutions to even out
groove depth.
6. Release foot switch and retract upper groove roll by
placing the pump release lever in the RETURN posi-
tion (toward operator).
7. Check groove diameter before proceeding with addi-
tional grooves.
NOTE! Groove diameter should be measured using a
diameter tape. To increase groove depth, rotate
the adjustment knob. Each turn will change the
groove diameter by .100".
8. Periodically check groove with a diameter tape or sim-
ilar measuring device.
Roll Grooving Tips with 920
1. If pipe tends to "walk off" drive roll, check set-up. If
correct, increase stabilizer pressure.
2. If flare is excessive, use less pressure and slope
the pipe downward as it goes away from the machine.
Grooving Short Lengths of Pipe
WARNING
what is recommended. (Refer to Charts A and B on Page
9) . Increases risk of fingers being caught in the grooving
rolls. Use stabilizer and follow proper procedures.
Ridge Tool Company
Do not reach inside or across pipe.
Never groove pipe that is shorter than