Screw Grips

In screw grips the gripping force is applied manually or via an electric motor. These grips are used mostly for smaller test loads (from 20 N to max. 50 kN) and thinner specimens—fine wires, fibers, films.
Screw grips 200N connector

Key Advantages and Features 

  • Gripping force depends on the locked rotor torque released by the operator
  • Very easy to operate
  • Large opening widths for flexibility in use
  • Most commonly used screw grips are U-shaped for good accessibility
  • Simple design principle enables standard version to be resistant to high temperatures
  • Depending on the type, these grips have an axial bearing in the gripping unit for increased gripping forces
  • Many screw grips feature free adjustment of both jaws, allowing asymmetrical specimens to be tested
Screw grips 20n with pattern

Screw Grips 

Fmax 20 N 
  • Specimen material
    Metal, plastics, textile, paper
  • Specimen shape:
    Round and flat specimens, sealed and glued specimens
  • Type of loading
    Tensile

Advantages and features

  • The lightweight design of the grips allows extensive use to be made of the load cell measurement range.
  • The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.

Technical data, Fmax 20 N

Item No.

313348

Type

8153

Test load (Fmax)

20

N

Dimensions

Height

60

mm

Width

30

mm

Depth

32

mm

Opening width, max.

3

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per specimen grip, approx.

35

g

Connection, pin

Ø 8

mm

Ambient temperature

-70 to +250

°C

Scope of delivery

2

pieces

Jaws included

Surface

aluminum, smooth

Gripping area (H x W)

16 x 20

mm

Hardness

not hardened

Screw grips 200N redspecimen

Screw Grips 

Fmax 200 N

Specimen materials:metal foils, foil tapes, yarns, threads
Specimen shape: Round and flat specimens
Type of loading: Tensile

Advantages and features

  • The lightweight design of the grips allows extensive use to be made of the load cell measurement range.
  • Precise test results combined with high number of cycles thanks to centering aid for insertion of wires and threads.
  • High jaws ensure gentle gripping of the specimen, avoiding jaw breaks .

Technical data, Fmax 200 N

Item No.

313308

Type

8131

Test load (Fmax)

0.2

kN

Dimensions

Height

80

mm

Height with hand wheel

85

mm

Width

81

mm

Depth

30

mm

Depth with hand wheel

48

mm

Opening width, max.

2

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per specimen grip, approx.

400

g

Connection, pin

Ø 8

mm

Ambient temperature

-70 to +250[1]

°C

Scope of delivery

2

pieces

  1. The temperature range may be limited by a smaller jaw temperature range.
Screw grips 200N insteps

Screw Grips

Fmax 200 N
  • Specimen material:
    metals, plastics, textiles, paper
  • Specimen shape:
    round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    tensile, compression, alternating load

Function description

This screw grip is a one-sided closing specimen grip. A screw is used to open and close the grips, as well as apply gripping force before the test.

The clamping unit can be adjusted in 1 mm increments using a tool to change the gripping range.

  • The opposing jaw is different depending on type:
  • Step-by-step adjustable: securely mounted, can be adjusted in 1 mm increments with a tool
  • Stepless and step-by-step adjustable: adjustable via lead screw, additionally adjustable in 1 mm increments with a tool

The specimen grip can be mounted below 45° and 90°.

The opposing jaw of the screw grip that can be adjusted step by step is permanently mounted, but the gripping range can be adjusted with a tool in 1-mm stages. The specimen grips are factory set to a specimen thickness of 0 mm.

You can set the stepless grip insert of the stepless and step-by-step adjustable screw grip to half specimen thickness. The closing force is generated via the gripping wheel. The opening width can be adjusted from 0 to 10 mm.

Advantages and features

  • The lightweight design of the grips allows extensive use to be made of the load cell measurement range.
  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • If the test configuration changes the jaws can be changed quickly and easily - no tools required. The jaws are centered automatically.
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.
  • Ergonomic, open design for fast, easy specimen insertion and clamping
  • Difficult-to-access components and short specimens can easily be reached by hand thanks to the projecting grips.

Technical data, Fmax 200 N

Item No.

025959

032334

025960

032335

Type

8033

8033

8033

8033

Opposing jaw adjustment

stepped

stepped

stepless and stepped

stepless and stepped

Test load (Fmax)

0.2

0.2

0.2

0.2

kN

Dimensions

Height

60

60

60

60

mm

Width

98 to 108

98 to 108

111 to 119

111 to 119

mm

Depth

20

20

20

20

mm

Opening width, max.[1]

18

18

18

18

mm

Specimen gripping

Specimen must be gripped over at least 1/2 of the jaw.

Weight per specimen grip, approx.

147

147

172

172

g

Connection, pin

Ø 8

Ø 8

Ø 8

Ø 8

mm

Ambient temperature

-70 to +250[2]

-70 to +250[2]

-70 to +250[2]

-70 to +250[2]

°C

Scope of delivery

2

1

2

1

pieces

  1. This standard opening width is the product of using jaws 4mm thick, with jaw and opposing jaw adjusted outwards. If only the opposing jaw is adjusted outwards (adjustment range up to 9 mm) the resultant maximum opening width is 14 mm.
  1. The temperature range may be limited by a smaller jaw temperature range.
Screw grips

Screw Grips 

Fmax 500 N
  • Specimen material:
    metals, plastics, paper
  • Specimen shape:
    flat specimens, sealed and glued specimens
  • Type of loading:
    tensile

Advantages and features

  • The lightweight design of the grips allows extensive use to be made of the load cell measurement range.
  • The base unit acts as a centering stop for 15mm-wide strip specimens.

Technical data, Fmax 500 N

Item No.

313320

313322

Type

8132

8132

Test load (Fmax)

500

500

N

Dimensions

Height

88.5

88.5

mm

Width

77

77

mm

Depth

44

44

mm

Specimen width, max.

15

15

mm

Opening width, max.

3

3

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per specimen grip, approx.

0.25

0.25

kg

Connection, pin

Ø 8

Ø 8

mm

Ambient temperature

-70 to +250

-15 to +80

°C

Scope of delivery

2

2

pieces

Jaws included

Surface

steel, smooth

Vulkollan, smooth

Gripping area (H x W)

23 x 16

23 x 16

mm

Hardness

200 HB

95 Shore A

Seal strength of packaging films

Screw Grips

Fmax 1 kN 
  • Specimen material:
    Metal, plastics, textile, paper, wood
  • Specimen shape:
    Round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    Tensile, compression, alternating load

Advantages and features

  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • If the test configuration changes the jaws can be changed quickly and easily - no tools required. The jaws are centered automatically.
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • Reliable specimen gripping guaranteed even with varying applications. Large range of jaws allows optimum matching of the grips to your application.
  • Even specimens prone to shrinkage are securely held via automatic re-tightening by means of a laminated plate spring
  • The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.
  • Precise test results combined with high number of cycles achieved through centric insertion of specimen using easily adjustable centering stop.
  • Ergonomic, open design for fast, easy specimen insertion and clamping

Technical data, Fmax 1 kN

Item No.

316264

316526

014764

014766

317660

014768

Type

8133

8133

8133

8133

8133

8133

Opposing jaw adjustment

stepped

stepped

stepped

stepped

stepped and stepless

stepped and stepless

Test load (Fmax)

1

1

1

1

1

1

kN

Dimensions

Height

Without overhang

85

85

85

85

85

85

mm

With overhang

95

95

95

95

95

95

mm

Width

163

163

163

163

195

195

mm

Depth

Without hand wheel

32

32

32

32

32

32

mm

With hand wheel

50

50

50

50

50

50

mm

Opening width, max.

18[1]

18[1]

18[1]

18[1]

18[2]

18[2]

mm

Specimen gripping

The specimen must be gripped over at least 2/3 of the jaw height.

Weight per specimen grip, approx.

0.55

0.55

0.67

0.67

0.63

0.81

kg

Connection, pin

Ø 8

Ø 8

Ø 20

Ø 20

Ø 8

Ø 20

mm

Ambient temperature

-70 to +250[3]

-70 to +250[3]

-70 to +250[3]

-70 to +250[3]

-70 to +250[3]

-70 to +250[3]

°C

Scope of delivery

2

1

2

1

2

2

pieces

  1. This standard opening width is the product of using grip inserts 5mm thick and opposing jaw with 9mm outward adjustment. In the case of symmetrically clamped specimens it is also the maximum specimen thickness.
  1. This standard opening width is the product of using grip inserts 5mm thick and opposing jaw in home position (= markings coincide).
  1. The temperature range may be limited due to grip inserts with a smaller temperature range.
Screw grips 2.5kN

Screw Grips 

Fmax 2.5 kN
  • Specimen material:
    Metal, plastics, textile, paper, wood
  • Specimen shape:
    Round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    Tensile, compression, alternating load

Advantages and features

  • Large opening widths offer flexibility.
  • Adjustable opposing jaws allows eccentric specimen gripping, enabling asymmetrical gripping of specimens.
  • A range of jaws ensures optimum matching to test material: Various materials, surface structures and gripping surface sizes are available.
  • Jaws can be changed without tools. Easy side insertion into specimen grip and centering and fixing of jaws follow automatically.
  • High gripping force is achieved through the axial bearing and gear ratio in the clamping unit.
  • Prestressed spring disk induces automatic retightening in smaller areas. Specimens with lower thickness reduction can also be gripped securely over the course of the entire test.
  • High temperature resistance (-70 to +250 °C) is ideal for use in temperature chambers.
  • Simple handling
  • The U-design provides good accessibility to the screw grip and offers ample space for flexible specimen ends

Technical data, Fmax 2.5 kN

Item number

316322

Type

8253

8253

8253

Opposing jaw can be adjusted

In steps

Test load (Fmax)

2.5

2.5

2.5

kN

Dimensions

Height

Without overhang

95

95

95

mm

With overhang

100

100

100

mm

Width

196

196

201

mm

Depth

Without hand wheel

32

32

32

mm

With hand wheel

50

50

50

mm

Opening width, max.

18[1]

18[2]

18[3]

mm

Specimen clamping

The specimen must be clamped above at least 2/3 of the jaw height.

Weight per specimen grip, approx.

1.2

kg

Connection, bolts

Ø 20

mm

Temperature range

-70 to +250[4]

-70 to +250[5]

-70 to +250[5]

°C

Scope of delivery

2

1

2

pieces

  1. This standard opening width is a result of using grip insert with 5-mm jaw strength and an opposing jaw that is outwardly adjusted by 9 mm. This is also the maximum specimen thickness for symmetrically tensioned specimens.
  1. This standard opening width is the product of using grip inserts 5mm thick and opposing jaw with 9mm outward adjustment. In the case of symmetrically clamped specimens it is also the maximum specimen thickness.
  1. This standard opening width is the product of using grip inserts 5mm thick and opposing jaw in home position (= markings coincide).
  1. It is possible that the temperature range is limited by a smaller grip insert temperature range.
  1. The temperature range may be limited due to grip inserts with a smaller temperature range.

Screw Grips

Fmax 5 kN 
  • Specimen material:
    metals, plastics, textiles, wood
  • Specimen shape:
    round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    tensile, compression, alternating load

Advantages and features

  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • Ergonomic, open design for fast, easy specimen insertion and clamping
  • Uniform, parallel closing/gripping via precision 4-column guides ensures specimen is held securely.

Technical data, Fmax 5 kN

Item No.

320436

Type

8354 PL[1]

Test load (Fmax)

5

kN

Dimensions

Height

125

mm

Width

225

mm

Depth

60

mm

Opening width, max.

25

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per specimen grip, approx.

3.8

kg

Connection, pin

Ø 20

mm

Ambient temperature

+10 to +35

°C

Scope of delivery

1

piece

Jaws included

Surface

Vulkollan, smooth

Gripping area (H x W)

50 x 60

mm

Hardness

95 Shore A

  1. PL = ProLine
Screw grips 10kN connector

Screw Grips

Fmax 10 kN 
  • Specimen material:
    metals, plastics, textiles, wood
  • Specimen shape:
    round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    tensile, compression, alternating load

Advantages and features

  • No tools required for jaw change; simply slide into grips from side. Jaws are centered and locked into place automatically.
  • High temperature resistance (-70 to +250 °C) makes the grips ideal for use in temperature chambers.
  • Integrated jaw mountings.

Technical data, Fmax 10 kN

Item No.

320436

320440

318587

Type

8354 PL[1]

8354 PL[1]

8354

Test load (Fmax)

5

10

10

kN

Dimensions

Height

125

125

125

mm

Width

225

225

233

mm

Depth

60

60

60

mm

Opening width, max.

25

25

25[2]

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per specimen grip, approx.

3.8

3.9

7

kg

Connection, pin

Ø 20

Ø 20

Ø 20

mm

Ambient temperature

+10 to +35

+10 to +35

-70 to +250[3]

°C

Scope of delivery

1

1

2

piece

Jaws included

Surface

Vulkollan, smooth

Steel, pr[4] 0.7

-

Gripping area (H x W)

50 x 60

50 x 60

-

mm

Hardness

95 Shore A

61 HRC

-

  1. PL = ProLine
  1. This standard opening width is the result of using jaws with 5-mm jaw thickness.
  1. The temperature range may be limited by a smaller jaw temperature range.
  1. Pr = diamond pattern
Screw grips

Grips for insulating materials 

Fmax 10 kN
  • Specimen material:
    insulating materials
  • Specimen shape:
    flat specimens
  • Type of loading:
    tensile

Advantages and features

  • The clamping distance is symmetrical to the tensile axis. This is advantageous because the specimen is not subject to bending moments.
  • Secure gripping is ensured by protruding pins located in the jaws.
  • A support grip located in the center of the screw grips facilitates gripping and vertical alignment of the specimen.

Technical data, Fmax 10 kN

Item No.

318405

318407

Type

8330

8330

Test load (Fmax)

10

10

kN

Dimensions

Height

234

244

mm

Width

256

370

mm

Width with hand wheel

366

480

mm

Depth

500

500

mm

Opening width, max.

see jaws

see jaws

Weight per grip unit, approx.

30

32

kg

Connection, pin

Ø 20

Ø 20

mm

Ambient temperature

0 to +50

0 to +50

°C

Scope of delivery

2

2

pieces

Screw grips

Screw Grips

Fmax 20 kN 
  • Specimen material:
    metals, plastics, textiles, wood
  • Specimen shape:
    round and flat specimens, asymmetrical specimens, sealed and glued specimens
  • Type of loading:
    tensile, compression, alternating load

Advantages and features

  • High temperature resistance (-70 to +250 °C) is ideal for use in temperature chambers.
  • Integrated jaw mounting.
  • An increased closing force is achieved through the axial bearing in the clamping unit.
  • Jaws can be changed without tools. Easy side insertion into specimen grip and centering and fixing of jaws follow automatically.

Technical data, Fmax 20 kN

Item No.

318591

Type

8355

Opposing jaw adjustment

stepless

Test load (Fmax)

20

kN

Dimensions

Height

155

mm

Width

250

mm

Depth

60

mm

Opening width, max.

25[1]

mm

Specimen gripping

The specimen must be gripped over at least 3/4 of the jaw height.

Weight per grip unit, approx.

9

kg

Connection, pin

Ø 36

mm

Ambient temperature

-70 to +250[2]

°C

Scope of delivery

2

pieces

  1. This standard opening width results from using 5mm-thick jaws.
  1. The temperature range may be limited by a smaller jaw temperature range.

Screw Grips

Fmax 30 kN and Fmax 50 kN
  • Specimen material:
    Plastics, textiles, wood (solid, non-yielding materials)
  • Specimen shape
    Round and flat specimens (strips and dumbbells)
  • Type of loading
    Tensile, compression, alternating load

Technical data, Fmax 30 kN and Fmax 50 kN

Item No.

325314

Type

8451

8451

Test load, max. (Fmax)

30

50

kN

Height

130

130

mm

Width

108

108

mm

Depth

139

139

mm

Adjustability of the opposing jaw

None

None

Opening width with jaws, max.

10

10

mm

Gripping of the specimen

The specimen must be gripped above at least 3/4 of the jaw height.

The specimen must be gripped above at least 3/4 of the jaw height.

Weight of one specimen grip (without jaws), approx.

6

6

kg

Connection

Ø 36

Ø 36

mm

Ambient temperature

-70 to +250[1]

-70 to +250[1]

°C

Scope of delivery

2

2

piece

  1. It is possible that the temperature range is limited by a smaller jaw temperature range.

Screw Grips

Fmax 50 kN 
  • Specimen material:
    Plastics, textiles, wood (solid, non-yielding materials)
  • Specimen shape
    Round and flat specimens (strips and dumbbells)
  • Type of loading
    Tensile, compression, alternating load

Technical data, Fmax 50 kN

Item No.

313626

Type

8455

Operating principle/identification

Fixed opposing jaw

Test load, max. (Fmax)

50

kN

Height

170

mm

Width

200

mm

Depth

213

mm

Opening width, max. with jaws

25

mm

Gripping of the specimen

The specimen must be gripped above at least 3/4 of the jaw height.

Weight per specimen grip (without jaws), approx.

20.3

kg

Connection

Ø 36

mm

Ambient temperature

-70 to +250[1]

°C

Scope of delivery

2

pieces

  1. It is possible that the temperature range is limited by a smaller jaw temperature range.
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