MTS Model 680-01 High-Temperature Grips - Manual (Page 28)

Model 680.01 High-Temperature Grips 28
6. Using spanner wrenches, rotate the two halves of the spiral washers in
opposite directions to tighten them. The opening between the washers must
not exceed an arc of 30° from the closed position.
If more than a 30° arc is created, remove the tensile load from the specimen.
Remove the specimen and tighten the grips on the mounting studs, taking
care not to misalign the wedge openings. Repeat Step 4 through Step 6 of
this procedure.
7. Reduce tensile force to zero and remove the specimen.
8. Remove the system hydraulic pressure.
Connector Stud and Spiral Washers
Connector Stud
Decrease Thickness
Medium Thickness
Do not exceed.
Connector
Stud
Increase Thickness