How do I choose the right grips for testing steel rebar and large specimens?

For high-force applications like rebar testing, hydraulic wedge grips are the standard and most reliable choice. Key selection criteria:

• Capacity: Grips must be rated for the machine’s full force. Never use under-rated grips.

• Jaw Face: Use serrated (v-groove) jaws for round rebar and flat knurled jaws for flat specimens.

• Self-Alignment: Look for grips with spherical seating to ensure perfect axial alignment, which is critical for accurate results and preventing premature jaw breakage.

• Safety: Ensure the grip design includes a safety shield to contain fragments in case of specimen failure. For very large diameters, custom split-collar grips may be required.