The Taber® Stiffness Testers provide accurate test measurements to ±1.0% in stiffness and resiliency evaluation in thicknesses from 0.004 in. to 0.219 in. Incorporated in the Taber Stiffness Tester is a pendulum weighing system. Providing an accurate and responsive method for measuring small load increments, this system is a critical component for determining material stiffness or resiliency. Nine distinct ranges permit testing of materials that are extremely lightweight and flexible (such as cellophane or thin metallic foils) to items that are very rigid (such as plastics).
Paper, Cardboard, Plastic, Metals, Fabric, Felt, Leather, Rubber, Wire, Tubing and other Sheet Materials

The Digital Stiffness Tester has an on-board computer that automatically calculates and records stiffness testing data. Stiffness readings are automatically converted to the appropriate user-selected stiffness range, eliminating the need to manually multiply results by a scaling factor. The unit also calculates average, standard deviation and high/low readings.
With the accessory ports, data can be either printed or downloaded to a PC. Plus, up to 1,000 readings can be stored in non-volatile memory. In addition to the internal real-time clock and calendar, stored readings can be identified with an optional user-defined label.
Using the 16 button keypad, operators have the ability to select the direction, deflection and number of cycles. The instrument also offers the ability to perform testing in auto or manual mode.
The Analog Stiffness Tester is a manually operated instrument. Offering the same accurate, precision test results as the Digital Stiffness Tester, this instrument requires the user to record stiffness testing data, average the readings and multiply results by a scaling factor.
Mounted on telescoping tripod legs, the Analog Stiffness Tester is lightweight for easy portability. Electronic components are sealed in a rugged housing.
Test procedures for the Taber Stiffness Tester have been established by a number of organizations. The following is a partial listing.
| Organization | Standard No. | Method | ||
| Appita | P 431 rp-73 | Stiffness of Paper and Paperboard | ||
| ASTM | D 5342 | Test Method for Resistance to Bend, Paper and Paperboard (Taber-Type Tester) | ||
| ASTM | D 5650 | Resistance to Bending of Paper of Low Bending Stiffness (Taber-Type Tester) | ||
| CPPS | D28P | Stiffness of Paper and Paperboard (Taber Method) | ||
| ISO | 2493 | Paper and Board - Determination of Resistance to Bending | ||
| JIS | P8125 | Testing Method for Stiffness of Paperboard by Bending Load | ||
| SAA AS | 1301.431RP | Methods of Test for Pulp and Paper - Taber Bending Resistance of Paper and Paperboard | ||
| TAPPI | T489 os-92 | Stiffness of Paperboard | ||
| TAPPI | T566 om-97 | Bending Resistance (stiffness) of Paper (Taber Type Tester in 0–10 Taber Stiffness Unit Configuration) | ||
| UNE | 57-075-74 | Determination of Stiffness of Paper and Board, Static Bending Method (Spanish) | ||
| ZZ | M-71D | Matting, Rubber, and Vinyl |
Electrical:
Digital Model- 115/230V, 50/60Hz, CE approved
Analog Model - 110V, 60Hz
| Digital | Analog | |||
| Depth: | 394 mm (15-1/2 in.) | 254 mm (10 in.) | ||
| Height: | 381 mm (15 in.) | 419 mm (16-1/2 in.) | ||
| Width: | 254 mm (10 in.) | 222 mm (8-3/4 in.) | ||
| Weight: | 11.3 kg. (25 lb.) | 5.9 kg. (13 lb.) |
Digital Stiffness Tester - Catalog Number 79-05-00
Analog Stiffness Tester - Catalog Number 79-03-00
For additional information on TMI Products and Services, or to learn how Testing Machines can help your company profit through testing, please call us at 1-800-678-3221, or e-mail info@testingmachines.com.
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Optional Accessories:
Triple Cut Specimen Shear - Catalog No. 79-03-01
High Sensitivity Attachment - Catalog No. 79-03-04
3,000 and 5,000 calibrated weights to extend test range - Catalog No. 79-03-02
Other Models:
Taber Stiffness Testers are available in two models. Both units offer bi-directional pendulum type testing in a range from 0–10,000 Taber Stiffness Units.
The TMI Catalog on CD-ROM:
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Click here to request a copy or call 631-439-5400 or 1-800-678-3221 (from with U.S. and Canada).
The TMI Guide to Pulp and
Paper Testing:
Click here for the TMI Guide to Pulp and Paper Testing in PDF format.