Model 604SB thru 612SB Clamshells
92-1197 Rev. 200519
21
5.
These Locking Screws are captured in their holes so that they will not come
totally free of the Clamshell.
6. Separate the Clamshell halves by pulling straight apart.
7. Secure the Clamshell to the pipe.
8. Clean the mating surfaces and the ID of the Clamshell halves.
9. Wipe clean the mounting surface of the pipe.
10.
Check that the Tool Blocks will clear the pipe when the Clamshell is mounted.
11.
Close the halves of the Clamshell around the pipe, keep the mating surfaces
clean.
12.
Check that the Alignment Pins have seated the two halves properly.
13.
Bolt the two halves of the Clamshell together using the Locking Screws in the
Housing and in the Headstock. The tightening torque must be 35 to 40 ft-lbs.
(47 to 54 N-m).
14.
If you use Fixed Clamping Pads, clamp the Clamshell to the pipe as follows: if
not, go to step 22 “If using the fully Adjustable Clamping Pads...”.
15.
Tighten the Adjustable Pads lightly so that all of the Clamping Pads contact
the pipe.
16.
Gently rock the Clamshell as you tighten the Adjustable Clamping Pads to
seat the Clamshell square on the pipe.
17.
Check that all Clamping Pads fully contact the pipe. If not, repeat the last
three steps.
18. Tighten the Clamping Pads. Tightening torque should be 40 to 50 ft-lbs. (54
to 68 N-m).
19.
Go to “General Machining Sequence”.
20. If using the fully Adjustable Clamping Pads, clamp the Clamshell to the pipe
as follows:
21.
Rough center and square the Clamshell by tightening the Clamping Pad
independently.
22. Visually check the center and squareness. The Adjustable Pads tend
to square the Clamshell to the pipe. If additional precision in squaring is
required, consult Tri Tool Inc. about alternate methods of squaring.
23. Fine center the Clamshell as you would a 4-jaw check.
