MTS Model 680-01 High-Temperature Grips - Manual (Page 37)

Model 680.01 High-Temperature Grips 37
Install Button-End Specimens
Perform the following procedure to mount button-end specimens in the grips.
Ensure that all grip parts are sufficiently cool before touching them.
• Specimen adapters for button-end specimens are two-piece adapters and
must be fully screwed into the grip extensions for operation.
• Specimens should have a button thickness no larger than 33 mm (0.540 in).
This will correctly position the specimen end for grip operation.
Specimen mounting is a potentially hazardous procedure because hydraulic
pressure is applied to the system and actuator movement is required.
This can cause personal injury. It can also apply damaging forces to the
specimen, furnace, or to other fixtures.
Use extreme care while performing the following steps.
1. Determine the hydraulic pressure that must be applied to the grips in order
to adequately grip the specimen.
2. Make sure that the specimen adapters are clean and free of accumulated
oxide deposits.
3. Apply a liberal amount of anti-galling compound (supplied with the grips)
to the threads of both specimen adapters to ensure easy removal after high-
temperature operation.
4. Place the two halves of one specimen adapter around one end of the
specimen and screw the specimen adapter fully into the upper grip
extension.
Note Each grip specimen adapter for button-end specimens is made up of a
matched pair of halves. Each piece is marked with an alphabetic
identifier. Select a matched pair of pieces for each specimen adapter.
WARNING
Two Piece
Specimen Adapter
Upper Grip
Extension
Viewing Port
Specimen
Adapter
Button-end
Specimen