Tinius Olsen offers a complete range of torsion testing machines in capacities from 10,000 to 300,000 in.lbf or kg.cm (1,000 to 30,000 N.m) to achieve maximum capability and versatility. Higher capacity and other longer length models can be procured upon request.

These exclusively superior torsion testers offer loading and weighing capabilities in both directions of rotation. This feature makes it possible to suitably establish not only the ultimate torque of a specimen, but also how that specimen acts under conditions of intermittent or continuous torque loading in both directions.

Fundamentally, each torsion tester consists of a variable speed drive loading system, and a digital control and indicating system in a fixed section of the machine. The weighing head with its strain gage torque sensor is mounted on a movable section that can be located on rails to house specimens of different lengths.

Tinius Olsen 10,000 in.lbf (1,000 N.m) torsion tester is bench mountable and the movable section slides on a guide rail.

All other models are floor-based and are furnished with heavy duty slotted steel bed rails that are usually embedded in, or secured to, a concrete foundation to guarantee highest rigidity and accessibility. The movable section on these higher capacity machines is mounted on four rollers that glide along these slotted rails and allow quick positioning. Furthermore, these rollers allow the movable unit to compensate for any variations in specimen length during loading. The typical maximum distance between chucks is 7 ft (approximately 2.1 m); however, other lengths can be delivered.

All torsion testers possess Tinius Olsen’s patented bidirectional grips, which ensure slip-free specimen clamping irrespective of the twist direction. With these precision machined universal grips, loads can be applied in both directions without the need for changing grips.

The sturdy, electromechanical loading system makes use of a gear reduction system coupled directly to an adjustable speed drive motor. This reversible loading system provides positive, infinitely variable testing speeds from 0.5-180° per minute in either direction (the 10,000 in.lbf model offers a testing speed range from 0.5-360° per minute in either direction). As the load surges, more power is delivered to the twisting head to apply additional torque to the specimen to maintain the preselected twisting rate.

No system will be whole without regulatory software and data analysis of the resultant data. The incorporation of a torsion test module to Tinius Olsen Horizon software allows full machine control along with capture and analysis of the resultant torsional test data, revealing the material behavior throughout the test.

Technical Specifications

Capacity in.lbf or kgf.cm 10,000 60,000 120,000 200,000 300,000
N.m 1000 6000 12,000 20,000 30,000
Mounting   Bench Floor Floor Floor Floor
Maximum specimen diameter in 1.5 3 3 5 5
mm 38 76 76 127 127
Maximum specimen length in 18 72 60 84 90
mm 457 1829 1524 2134 2286
Test speed degrees per min 5-360 5-180 5-180 5-180 5-180
Weight (net) lb 1100 6200 7625 9050 13,500
kg 500 2800 3500 4100 6130
Dimensions (LxDxH) in 62 x 25 x 29 148 x 36 x 78 176 x 45 x 78 204 x 52 x 81 220 x 64 x 84
mm 1570 x 630 x 730 3760 x 900 x 1980 4470 x 1140 x 1980 5180 x 1320 x 2050 5590 x 1620 x 2130



. .
Torque measurement accuracy +/- 0.5% of indicated torque from 0.2% to 100% capacity
Position measurement accuracy +/- 0.1% of reading or 0.05°, whichever is greater
Speed accuracy +/- 0.1% of set speed
Operating temperature range 32-100 °F (0-38 °C)
Storage temperature range 14-115 °F (-10-45 °C)
Humidity range 10% to 90% non-condensing, wet bulb method
Power Standard optional voltages 220/240 VAC, 50-60 Hz; power must be free of spikes and surges exceeding 10% of the nominal voltage


Optional Features

  • Torsional pickups can be fixed directly to the sample for exact measurement of the angle of twist


Based upon its long history of delivering solutions to a vast variety of testing problems, Tinius Olsen has developed Horizon, a complete software program that makes testing precise, simple, and efficient.

Whether the test sample is metal, composite, paper, rubber, polymer, textile or a micro-component, Tinius Olsen’s Horizon software surpasses beyond data collection and presentation. It will help automate operations, from R&D to the charting and analysis of QC testing.

Horizon offers a library of regular, specific, and application-focused test routines that have been developed in close partnership with customers worldwide and to the standards they are using.

Among the many beneficial features offered by Horizon are: a test routine library; test, output, method and result editors; real-time multiple machine control; and multilayered security. This software is programed for data acquisition, data analysis, and closed loop control of virtually all Tinius Olsen testing machines.

Horizon is full of capabilities that enhance productivity and enable users to develop, access, and use an advanced, powerful materials testing database. The software employs the latest Windows environments to develop an intuitive user experience. Integral tutorials, online help, and help desk access provide extra user support.

The Video Extensometer software screens the object under test. By fixing an appropriate lens to the high-resolution cameras, the Video Extensometer will measure objects smaller than 1 mm to larger than 100 m. The software applies patented technology to precisely measure the 2D position of targets in images from the video camera; special targets are not mandatory. The user identifies these targets to the system just by using the mouse to drag a bounding box around them. The system then exactly measures the position of each target in every image from the video camera.

Up to 100 targets can be measured in real time at 15 Hz and, from the measured positions of these targets, the system can calculate velocity, angular rotation, acceleration, displacement, and 2D strain.

Tinius Olsen's 10k to 300kN Torsion Testers

Torsion Testers
A 200,000 in.lbf torsion tester for testing samples up to 7 ft/2.1 m long and 5in/125mm diameter. The machine is shown with the optional PC-based software.
Samples are easily mounted in the patented bidirectional grips.
Top to bottom: A test in progress on the 10,000 in.lbf model with a painted sample rod of steel.
“Horizon makes testing simple, precise and efficient”
“Horizon makes testing simple, precise and efficient”
“Horizon makes testing simple, precise and efficient”

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