Inspecting Threads - RIDGID 141 Manual De Instrucciones

Model 141/161 Receding Geared Threaders
9. Press the foot switch to start threading. Flood the
dies with oil to lower threading torque, improve thread
quality and increase die life (Figure 21) .
Geared Threader
Figure 21 – Operating Position (Close-Coupled Method)
10. Continue threading until the edge of die head is flush
with the red stop line on the pinion sleeve (Figure 5) .
Release foot switch. If threading is continued past the
red stop line, the pinion shaft will disengage to prevent
jamming. Do not continue to operate with the pinion
shaft disengaged – over time this can cause tool
damage.
11. Put the FOR/OFF/REV switch in the REV position.
Resume operating position and step on foot switch to
back die head off approximately one turn. Release
foot switch and place the FOR/OFF/REV switch in
OFF position.
12. Pull cam plate knobs out and rotate cam plate towards
the "CD" mark on top of the die head to retract the
dies. This prevents the dies from dragging while
returning the geared threader to the start position.
13. Put the FOR/OFF/REV switch in the REV position.
Resume operating position and step on foot switch to
back the die head to the appropriate starting point for
the next thread.
14. Remove foot from the foot switch. Place the FOR/ -
OFF/ REV switch in the OFF position and unplug the
threading machine.
15. If the workholder is unscrewed from the threaded
14
Workholder
Pipe
Pipe
Support
barrel, DO NOT try to re-engage the thread under
power. Remove the geared threader from the machine
and re-engage by hand.
16 Carefully remove the pipe from the geared threader
and inspect.

Inspecting Threads

1. Remove any oil, chips or debris from the thread.
2. Visually inspect the threads. Threads should be
smooth and complete, with good form. If issues such
as thread tearing or waviness, thin threads, or pipe
out-of-roundness are observed, the thread may not
seal when made up, especially in pressurized sys-
tems. Refer to the "Troubleshooting Chart" to diag-
nose these issues.
3. Inspect the size of thread. The preferred method of
checking thread size is with a ring gauge. There are
various styles of ring gauges, and their usage may dif-
fer from that described here.
• Screw ring gauge onto the thread hand tight.
• Look at how far the pipe end extends through the
ring gage. The end of pipe should be flush with the
side of the gauge plus or minus one turn (Figure
22) . If thread does not gauge properly, cut off the
thread, adjust the geared threader and cut another
thread. Using a thread that does not gauge properly
can cause leaks.
• If a ring gauge is not available to inspect thread
size, it is possible to use a new clean fitting rep-
resentative of those used on the job to gauge
thread size. The thread should be cut to obtain
2 1 / " to 4" NPT 5
2
engagement with the fitting.
4" to 6" NPT 6
engagement with the fitting.
2 1 / " to 4" BSPT 4 to 4
2
engagement with the fitting.
Thin Ring
Gauge
D
Flush
One Turn Large
(Basic Size)
(Maximum Size)
Checking Threads With Ring Gauge
Figure 12 – Checking Thread Size
4. Test the system in accordance with local codes and
normal practice.
1 / to 6 3 / turns to hand tight
2 4
3 / to 7 3 / turns to hand tight
4 4
1 / turns to hand tight
2
D
D
One Turn Small
(Minimum Size)