Pincer grips

The specimen grip for highly ductile plastics and elastomers

These grips are primarily used for testing highly ductile plastics and elastomers. The pincer principle produces a strong increase in gripping force during the test.

Advantages & features

Advantages

Secure specimen gripping through gripping force increasing proportionally to tensile force
The lateral mobility of the pincer grips allows specimens always to be loaded centrically to the test axis.
Ergonomic, open design for fast, easy specimen insertion and clamping
The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.

Function description

The pincer grip is a double actuator grip. The pincer grip is opened and closed via a clamping lever.

The prestressed spring holds the specimen grip open for specimen insertion. If the specimen grip is closed, the prestressed spring generates the required gripping force.

The gripping force is increased proportionally by the pincer principle as the tensile force increases. This ensures automatic retightening for specimens prone to shrinkage.

Technical overview

Item No.	316268
Type	8122
Operating principle/identification	Pincer action, auto. retightening
Test load F_max	0.5	kN
Dimensions
Height	65	mm
Height (Opened)	41	mm
Width	111	mm
Width (Opened)	124	mm
Depth	41	mm
Opening width, max. with jaws	15	mm
Specimen dimensions
Flat specimen, thickness	15	mm
Gripping of the specimen	The specimen must be gripped with at least 3/4 of the jaw height.
Gripping area
Height	12	mm
Width	30	mm
Weight per specimen grip, approx.	0.35	kg
Connection, stud	Ø 8	mm
Ambient temperature	-40 ... +250	°C
Scope of delivery	2	pieces

Item No.	316286
Type	8222
Operating principle/identification	Pincer action, auto. retightening
Test load F_max	2.5	kN
Dimensions
Height	97	mm
Height (Opened)	61	mm
Width	157	mm
Width (Opened)	178	mm
Depth	49	mm
Opening width, max. with jaws	20	mm
Specimen dimensions
Flat specimen, thickness	15	mm
Gripping of the specimen	The specimen must be gripped with at least 3/4 of the jaw height.
Weight per specimen grip, approx.	1.2	kg
Connection, stud	Ø 20	mm
Ambient temperature	-40 ... +250	°C
Scope of delivery	2	pieces

Item No.	069915	069914	314615	314950
Type	8322	8322	8322	8322
Operating principle/identification	Pincer action, auto. retightening	Pincer action, auto. retightening	Pincer action, auto. retightening	Pincer action, auto. retightening
Test load F_max	5	5	10	10	kN
Dimensions
Height	128	128	128	128	mm
Height (Opened)	88	88	88	88	mm
Width	224	224	224	224	mm
Width (Opened)	236	236	236	236
Depth	66	66	66	66	mm
Jaws supplied
Gripping area
Height	26	26	26	26	mm
Width	60	60	60	60	mm
Surface	Steel, St¹ 2 mm	Steel, St¹ 2 mm	Steel, St¹ 2 mm	Steel, St¹ 2 mm
Hardness	700 HV	700 HV	700 HV	700 HV
Opening width, max. with jaws	26	26	26	26	mm
Gripping of the specimen	The specimen must be gripped with at least 3/4 of the jaw height.
Weight, approx.	3.6	3.6			kg
Connection, stud	Ø 20	Ø 20	Ø 20	Ø 20	mm
Ambient temperature	-40 ... +250	-40 ... +250	-40 ... +250	-40 ... +250	°C
Scope of delivery	2	1	2	1	pieces
Weight per specimen grip, approx.			3.6	3.6