Operating The 920 Roll Groover; Pipe Preparation; Pipe/Tubing Length - RIDGID 920 Manual Del Operador

920 Roll Groover
4. Plug the machine into the electrical outlet making
sure to position the power cord along the clear path
selected earlier. If the power cord does not reach the
outlet, use an extension cord in good condition.
To avoid electrical shock and electrical
WARNING
fires, never use an extension cord that is damaged or
does not meet the following requirements.
• The cord has a three-prong plug similar to shown in
Electrical Safety section.
• The cord is rated as "W" or "W-A" if being used out-
doors.
• The cord has sufficient wire thickness (14 AWG
below 25'/12AWG 25' - 50'). If the wire thickness is
too small, the cord may overheat, melting the cord's
insulation or causing nearby objects to ignite.
To reduce risk of electrical shock, keep
WARNING
all electrical connections dry and off he ground. Do not
touch plug with wet hands.
5. Check the unit to insure it is operating properly.
• Flip the directional switch to FOR (Forward). Press
and release the foot switch. Check that the groove
roll rotates in a counterclockwise direction as you
are facing the groover. Have the power drive ser-
viced if it rotates in the wrong direction or if the foot
switch does not control its stopping or starting.
• Depress and hold the foot switch. Inspect the mov-
ing parts for misalignment, binding, odd noises or
any other unusual conditions that may affect the
safe and normal operation of the machine. If such
conditions are present, have the roll groover drive
serviced.
• Check the speed of the machine to insure it rotates
under 38 RPM. Higher speed machine increases
the risk of injury.
• Release the foot switch and flip the directional
switch to OFF.
6. Check the groove rolls to insure they are the correct
size. Refer to instructions on Page 13 for changing
the groove rolls.
8

Operating The 920 Roll Groover

Do not wear loose clothing or loose fitting gloves
when operating a Roll Groover. Keep sleeves and
jackets buttoned. Always wear eye protection to
protect eyes from dirt and other foreign matter.
Do not use this Roll Groover with a Power Drive
that has a broken or missing foot switch. Always
groove with the power drive switch in FORWARD
position so the unit will rotate in a counterclock-
wise direction.
Keep hands away from grooving rolls and stabilizer
wheel. Do not reach across the machine or pipe.
Never reach inside the pipe. Never groove pipe
shorter than what is recommended.

Pipe Preparation

1. Pipe ends must be cut square. Do not use cutting
torch.
2. Pipe out-of-roundness must not exceed the total O.D.
tolerance listed in groove specifications, Table I.
NOTE! Determine out-of-roundness by measuring max-
imum and minimum O.D. at 90 degrees apart.
3. All internal or external weld beads, flash or seams
must be ground flush at least 2" back from pipe end.
NOTE! Do not cut flats on gasket seat area.
4. End of pipe, both inside and out, must be cleaned of
coarse scale, dirt and other foreign material.
NOTE! Foreign material such as coarse scale or dirt
might interfere with or damage the grooving
rolls or distort the groove. Rust is an abrasive
material and will tend to wear out the surface of
the grooving rolls. For maximum grooving roll
life, remove foreign material and loose rust.

Pipe/Tubing Length

Chart A lists the minimum length of pipe or tubing to be
grooved and the maximum length to be grooved with
one (1) VJ-99 Pipe Stand.
Ridge Tool Company
WARNING