Wedge screw grips

Material

Metals
Plastics
Wood

Test load

500 N - 250 kN

Specimen shape

Round specimens
Flat specimens

Type of test

Tensile

The right combination

Wedge screw grips combine the mechanical properties of screw grips and wedge grips.

Thickness is adjusted and a preload force is generated via a screw action, which helps prevent specimen slipping at the beginning of the test.

Advantages & features

Advantages

The main gripping force is generated by the wedge action.
The gripping force is proportional to the actual tensile force (self-clamping), ensuring secure gripping of a wide range of materials.
Large grip-to-grip separation allows the surface pressure to be kept low, avoiding jaw breaks.
The larger grips (from Fmax 50kN) can remain in place while small load cells, specimen grips, test fixtures, and test devices are attached to them via the optional mounting unit— great time-saver.
Wedge screw grips with Fmax 50 kN and above can be operated via a pneumatic motor, These specimen grips are opened and closed by a
pneumatic motor; the pneumatic actuator is located directly on the specimen grip
Low overall height.
Strain rate control in accordance with standards DIN EN ISO 6892-1:2009 and ASTM E8 – 09.

Switchable synchronization function

Switchable synchronization allows wedge screw grips (Fmax 10 kN and above) to grip both symmetrically and asymmetrically. The asymmetry level is easily adjustable and is maintained reliably, even with regripping. One-handed operation is possible with either hand, including with asymmetrical specimens, ensuring that the specimen attachment point is always in the test axis.

Wedge screw grips, Fmax 2.5 kN

Wedge screw grips, Fmax 10 kN with makroXtens

Wedge screw grips, Fmax 50 kN

Wedge screw grips, Fmax 100 kN

Wedge screw grips, Fmax 150 kN

Wedge screw grips, Fmax 250 kN

Technical overview

Item No.	313284
Type	8106
Operating principle/identification	Simple version
Test load F_max	0.5	kN
Dimensions
Height	63	mm
Width	94	mm
Depth	28	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Opening width, max. with jaws	5¹	mm
Weight per specimen grip, approx.	200	g
Connection, stud	Ø 8	mm
Ambient temperature	-40 ... +250²	°C
Scope of delivery	2	pieces

For symmetrical gripping
The temperature range may be limited by a smaller jaw temperature range.

Item No.	313398
Type	8206
Operating principle/identification	Simple version
Test load F_max	2.5	kN
Dimensions
Height	115	mm
Width	152	mm
Depth	57	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Opening width, max. with jaws	10¹	mm
Weight per specimen grip, approx.	3	kg
Connection, stud	Ø 20	mm
Ambient temperature	-40 ... +250²	°C
Scope of delivery	2	pieces

For symmetrical gripping
The temperature range may be limited by a smaller jaw temperature range.

Type	8305
Item No.	021140
Test load F_max	10	kN
Dimensions
Height	143	mm
Width	246	mm
Depth	108	mm
Gripping of the specimen	The specimen must be gripped with at least 2/3 of the jaw height.
Opening width, max. with jaws	20¹	mm
Specimen dimensions
Flat specimen, thickness	>0 ... 20	mm
Round specimen, Ø	>0 ... 20	mm
Weight per specimen grip, approx.	8.6	kg
Connection, stud	Ø 20	mm
Ambient temperature	-70 ... +150²	°C
Scope of delivery	2	pieces

For symmetrical gripping
The temperature range may be limited by a smaller jaw temperature range.

Item No.	317404¹	317394¹
Type	8306	8406
Test load F_max	10	30	kN
Operating principle/identification	-	-
Dimensions
Height	125	137	mm
Width	319	319	mm
Depth	93	93	mm
Gripping area
Height	60	60	mm
Width	60	60	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Gripping travel	7	7	mm
Specimen dimensions
Flat specimen, thickness	0 ... 30	0 ... 30	mm
Round specimen, Ø	4 ... 30	4 ... 30	mm
Weight per specimen grip, approx.	15	16	kg
Connection, stud	Ø 20	Ø 36	mm
Ambient temperature	-40 ... +250²	-40 ... +250²	°C
Scope of delivery	2	2	pieces

Recommended and approved for strain rate control to the standards DIN EN ISO 6892-1:2009 and ASTM E8-09
The temperature range may be limited by a smaller jaw temperature range.

Item No.	317160¹	318659²³
Type	8406	8406
Operating principle/identification	Mechanical opening/closing	Motorized opening/closing
Test load F_max	50	50	kN
Dimensions
Height	146	146	mm
Width	385	407	mm
Depth	115	172	mm
Depth With stop strip	135		mm
Depth with actuation unit		231
Clamping surface
Height	80	80	mm
Width	60	60	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Gripping travel	8	8	mm
Specimen dimensions
Flat specimen, thickness	0 ... 42	0 ... 42	mm
Round specimen, Ø	4 ... 30	4 ... 30	mm
Weight per specimen grip, approx.	37	50	kg
Connection, stud	Ø 36	Ø 36	mm
Ambient temperature	-40 ... +250⁴	+10 ... +35	°C
Scope of delivery	2	2	pieces
Operating pressure, max. of pneumatic motor		7
Air consumption		5
Closing/opening speed at 6 bar		5
Motor noise level		72
Pneumatic connection	DN7

Recommended and approved for strain rate control to the standards DIN EN ISO 6892-1:2009 and ASTM E8-09
For the grip with motor-drinven is a mounting flange and mounting stud requried
Recommended and approved for strain rate control to standards DIN EN ISO6892-1:2009 and ASTM E8-09.
The temperature range may be limited by a smaller jaw temperature range.

Item No.	316901¹	318661¹
Type	8506	8506
Operating principle/identification	Mechanical opening/closing	Motorized opening/closing
Test load F_max	100	100	kN
Dimensions
Height	176	177	mm
Width	371		mm
Depth	115	172	mm
Depth with stop strip	135	-	mm
Depth with actuation unit and filter sound adapter		267
Clamping surface
Height	80	80	mm
Width	60	60	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Gripping travel	8	8	mm
Specimen dimensions
Flat specimen, thickness	0 ... 42	0 ... 42	mm
Round specimen, Ø	4 ... 30	4 ... 30	mm
Weight per specimen grip, approx.	44	50	kg
Connection, stud	Ø 60	Ø 60	mm
Ambient temperature	-40 ... +250²	+10 ... +35	°C
Scope of delivery	2	2	piece(s)
Operating pressure, max. of pneumatic motor		7
Air consumption		5
Closing/opening speed at 6 bar		5
Motor noise level		72
Pneumatic connection	DN7

Recommended and approved for strain rate control to standards DIN EN ISO 6892-1:2009 and ASTM E8-09.
It is possible that the temperature range is limited by a smaller jaw temperature range.

Item No.	318250¹	050156²
Type	8506	8506
Operating principle/identification	Mechanical opening/closing	Motorized opening/closing
Test load F_max	150	150	kN
Dimensions
Height	176	190	mm
Width	416	424	mm
Depth	140	140	mm
Depth with a stop strip		-	mm
Depth with actuation unit		293
Clamping surface
Height	80	80	mm
Width	60	60	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Gripping travel	8	8	mm
Specimen dimensions
Flat specimen, thickness	0 ... 42	0 ... 42	mm
Round specimen, Ø	4 ... 30	4 ... 30	mm
Weight per specimen grip, approx.	49	61	kg
Connection, stud	Ø 60	Ø 60	mm
Ambient temperature	-40 ... +250³	+10 ... +35	°C
Scope of delivery	2	2	pieces
Operating pressure, max. of pneumatic motor		7
Air consumption		5
Closing/opening speed at 6 bar		5
Motor noise level		72
Pneumatic connection	DN7

Recommended and approved for strain rate control in accordance with standards DIN EN ISO 6892-1:2009 and ASTM E8 – 09.
Recommended and approved for strain rate control to standards DIN EN ISO6892-1:2009 and ASTM E8-09.
It is possible that the temperature range is limited by a smaller jaw temperature range.

Item No.	318596¹	318598²
Type	8507	8507
Test load F_max	250	250	kN
Dimensions
Height	252	252	mm
Width	522	548	mm
Depth	158	237	mm
Depth with a stop strip	-		mm
Depthwith actuation unit and filter sound adapter		335
Gripping area
Height	100/120	100/120	mm
Width	80	80	mm
Gripping of the specimen	The specimen must be gripped with at least 1/2 of the jaw height.
Gripping travel	8	8	mm
Specimen dimensions
Flat specimen, thickness	0 ... 64	0 ... 64	mm
Round specimen, Ø	4 ... 80	4 ... 80	mm
Weight per specimen grip, approx.	108	112	kg
Connection, stud	Ø 60	Ø 60	mm
Ambient temperature	-40 ... +250³	+10 ... +35	°C
Scope of delivery	2	2	pieces
Operating principle/identification	Motorized opening/closing
Operating pressure, max. of pneumatic motor		7
Air consumption		5
Closing/opening speed at 6 bar		5
Motor noise level		≤ 72
Pneumatic connection	DN7

Recommended and approved for strain rate control in accordance with standards DIN EN ISO 6892-1:2009 and ASTM E8 – 09.
Recommended and approved for strain rate control to standards DIN EN ISO 6892-1:2009 and ASTM E8-09
It is possible that the temperature range is limited by a smaller jaw temperature range.

Do you have any questions regarding our products?

Please feel free to contact our product experts.
We look forward to discussing your needs.

Downloads

Product brochure: Specimen Grips and Test Tools PDF 4 MB
- DE
- EN
Product information: Wedge screw grips, Fmax 500 N / 2,5 kN PDF 530 KB
- DE
- EN
Product information: Wedge screw grips, Fmax 10 kN PDF 396 KB
- DE
- EN
Product information: Wedge screw grips, Fmax 10 kN / 30 kN PDF 681 KB
- DE
- EN
Product information: Wedge screw grips manual, Fmax 50 kN/100 kN/150 kN PDF 580 KB
- DE
- EN
Product information: Wedge screw grips manual, Fmax 250 kN PDF 161 KB
- DE
- EN
Product information: Wedge screw grips motorized, Fmax 250 kN PDF 535 KB
- DE
- EN

Wedge Screw Grips