Gurley Stiffness Tester (Automatic Type) - OpTest

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Gurley Stiffness Tester (Automatic Type)

This machine automatically measures the stiffness of paper, film, nonwoven textile, etc. By changing the specimen size and selecting a weight on the pendulum, it enables measurements of a wide range of stiffness. One end of the specimen is held on the movable clamp. The other end is set at a position so that it overlaps the top of the pendulum by 6.4mm. Then the arm with the specimen is slowly moved to deflect the specimen as the load increases, thereby tilting the pendulum. At last, specimen detaches from the pendulum. The maximum rotation angle at that detaching moment is captured by a sensor, to calculate and display stiffness. This machine releases the operator from tiresome calculation involving the specimen size and weight and position of the mass, as with the conventional tester, permitting accurate and rapid measurements, thereby increasing productivity in research and develop activities.

Product Name Gurley Stiffness Tester (Automatic Type)
Product Code KRK-2049-D
Standards/Methods JIS L-1085, 1096, TAPPI T 543 pm-00
Manufacturer Kumagai Riki Kogyo Co., Ltd. ( KRK )
Availability from OpTest Exclusive to Canada, USA, and Mexico

Measurement Range 1.39~450,000mg
Specimen Length 1”, 1 1/2”, 2 1/2”, 3 1/2”, 4 1/2”
Specimen Width 1/2”, 1”, 2”
Pendulum Mass weight and position (1”, 2”, 4”) of the mass set on the pendulum are selected, depending upon the flexual strength of the specimen
Direction of Specimen Three directions can be set: MD, CD, and non-directional (for recording)
Weights 5, 25, 50, 200g
Load Detection The inclination angle of the pendulum is detected, and sine of the angle is multiplied by a constant that depends upon the measurement conditions, to determine the load.
Zero Point Automatic Correction Correct themachine posture, and adjust the pendulum pointer to zero on the scale, and push the zero point adjusting switch.
Bending Speed rotation speed of the movable arm: 2rpm
Display of the Results left and right bending, average
Power Source 100/110VAC 50/60Hz 1A
Outer Dimentions 335×370×605mm
Instrument Weight 15kg


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