Testing that Reaches the World

The torque testing capabilities of Clark Testing’s torsional fatigue lab qualify it as one of the most comprehensive torsional/torque test laboratories in the world. The lab is anchored by our Tinius Olsen Torsional Load Frame. This machine has unique capabilities of 600,000 inch/lbs. of torque with unlimited rotation.

Our torsional fatigue lab also includes torque testing capabilities up to 200,000 lbs. ft. on a test specimen of 90’ in length, Clark is able to recreate the impact forces seen on most rotating apparatus. We conduct torque testing with variable rotary fatigue capabilities on motor shafts, prop shafts, rods, pipe & tubes for assessment of ultimate strength on rotating components. Clark’s rotary test systems can induce torque on test specimens with multiple diameters and lengths.

Torque test programs accelerate component life under simulated environmental conditions through cyclical aging. We rotate components to a specified cyclical duration or to failure depending upon the test plan. Along with the array of torque fatigue test systems at Clark, we have a Scanning Electron Microscope SEM to provide the microscopic analysis of the metallurgical reaction to the forces induced by the test program.

The Torque Fatigue Laboratory at Clark Testing can conduct beam and torsional fatigue testing of metals at high and low frequency. Our Torque Testing Laboratory can generate high cycle rotary fatigue on large diameter components with varied lengths including rotations from 30° to 90° rotation.

Repeated cyclic loading or torque will cause fatigue and stresses creating microscopic cracks that propagate to failure at the roots of the cracks to yield during cyclic aging. Torque testing on shafts, rods, pipe, studs, and threaded connectors are especially prone to this failure mode.

Upon failure, Clark Testing reports to our customers the points where stresses are prevalent, the number of cycles that the test sample experience, the amount of stress that the test sample experienced for each cycle the applicable failure mode of the material.

• Tinius Olsen Torsional Load Frame: 600,000 inch/lbs. static torsional load, unlimited rotation with bed length up to 240” or 20’.
• Rotary 1: 25,000 lbs. ft +/- 50° angular rotation; Torque, stroke or external control feedback; Variable bed length up to 102”; speed up to 10Hz depending on angular rotation.
• Rotary 2: 12,500 lbs ft.; +/- 90° angular rotation, one direction 90°; Torque, stroke or external control feedback; Bed length 96” up to 90’; speed up to 10Hz depending on angular rotation
• Rotary 3: 2,500 lbs ft. torque; +/-180° angular rotation, total 360° rotation; Torque, stroke or external control feedback; Bed length, 102” up to 90’; speed up to 10Hz depending on angular rotation
• Rotary 4: 12,500 lbs ft.; +/- 180° angular rotation, one direction 360°; Torque, stroke or external control feedback; Bed length 96” up to 90”; speed up to 10Hz depending on angular rotation
• Rotary 5: 417 lbs ft.; +/- 100° High speed rotation, Torque, stroke or external control feedback; Bed length 3’; speed up to 10Hz dependent on angular rotation
• Rotary 6: 400,000 lbs ft.; +/- 15° angular rotation, total 30° one direction; Torque, stroke or external control feedback; Bed length 90’; 1Hz maximum depending upon angular rotation.