WB Hydraulic & Pneumatic Jacking Systems

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Universal Bolt and Tool Calibrator

The industry standard for testing high-strength bolts.

Bolt Testing, using Skidmore Wilhelm’s Hydraulic Tension Calibrator, involves using hydraulic load cells like HS, MZ, S, etc., for tasks such as Pre-Installation Verification (PIV), Rotational Capacity (ROCAP), and general testing of fasteners. Compliance with AISC/RCSC specifications ensures performance evaluation of components like Hex Bolts, Tension Control Bolts, Anchor Bolts, Studs, Lock Nuts, and more. Skidmore Wilhelm's hydraulic tension calibrator, an industry standard since the 1950s, is crucial for testing high-strength bolts in tension-critical joints of structures.

Universal Bolt and Tool Calibrator
Skidmore Wilhelm’s Hydraulic Tension Calibrator Bolt Tester

As pioneers in the industry since the 1950s, Skidmore Wilhelm, WB Equipment’s trusted brand, has set the gold standard with our hydraulic tension calibrator. This universal bolt and tool calibrator is crucial for precise measurement in high-strength bolt testing, ensuring the integrity of steel buildings, bridges, and tension-critical joints.

Our versatile units seamlessly interface with hand torque wrenches, impact guns, electric wrenches, and hydraulic wrenches, providing the utmost safety and accuracy in bolt tension calibration.


"Bolt Testing" generally describes using our hydraulic load cells i.e. HS, MZ, S, etc. to measure fastener performance as follows:

  • Pre-Installation Verification (PIV) Testing & Rotational Capacity (ROCAP) Testing of structural fasteners per AISC/RCSC specifications.
  • General fastener testing to determine torque/tension relationships.
  • The types of components that can be tested include but are not limited to Hex Bolts, Tension Control Bolts, Anchor Bolts, Studs, Lock Nuts, Direct Tension Indicating Washers, etc.


Capacity: 126,000 lbs. Of Bolt Tension

The MZ-100 can be used with our adapter kits to test the following bolts sizes:

1/2" bolts
5/8" bolts
3/4" bolts
7/8" bolts
1" bolts
1-1/8" bolts
1-1/4" bolts
as well as metric equivalents M12, M14, M16, M18, M20, M22, M24, M27, M30.X

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