Screw Grips up to 500 N

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 500 N) and thinner specimens—fine wires, fibers, films, paper.
Screw grips

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

0.02

kN

Dimensions

Height

60

mm

Width

30

mm

Depth

32

mm

Opening width, max. with jaws

3

mm

Gripping of the specimen

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

Weight per specimen grip, approx.

35

g

Specimen dimensions

Flat specimen, thickness

0 ... 3

mm

Connection, stud

Ø 8

mm

Ambient temperature

-70 ... +250

°C

Scope of delivery

2

pieces

Jaws supplied

Surface

Aluminum, smooth

Gripping area

Height

20

mm

Width

16

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

Gripping of the specimen

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

Weight per specimen grip, approx.

400

g

Connection, stud

Ø 8

mm

Ambient temperature

-70 ... +250[1]

°C

Scope of delivery

2

pieces

  1. The temperature range may be limited by a smaller jaw ambient temperature.
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 lead 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 at 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

Test load Fmax

0.2

0.2

0.2

0.2

kN

Dimensions

Height

60

60

60

60

mm

Width

98 ... 108

98 ... 108

111 ... 119

111 ... 119

mm

Depth

20

20

20

20

mm

Gripping area

Height

20

20

20

20

mm

Width

20

20

20

20

mm

Opening width, max. with jaws[1]

18

18

18

18

mm

Gripping of the specimen

The specimen must be gripped with at least 1/2 of the jaw height.

Weight per specimen grip, approx.

147

147

172

172

g

Specimen dimensions

Flat specimen, thickness

0 ... 10

0 ... 10

0 ... 10

0 ... 10

mm

Round specimen, Ø

0 ... 10

0 ... 10

0 ... 10

0 ... 10

mm

Connection, stud

Ø 8

Ø 8

Ø 8

Ø 8

mm

Ambient temperature

-70 ... +250[2]

-70 ... +250[2]

-70 ... +250[2]

-70 ... +250[2]

°C

Scope of delivery

2

1

2

1

pieces

Operating principle/identification

In steps

Stepless and in steps

Stepless and in steps

  1. The opening width is a result of using jaws with 4 mm jaw thickness and an outwardly adjusted jaw and opposing jaw. If only the opposing jaw is outwardly adjusted (adjustment range up to 9 mm), the maximum opening width is 14 mm.
  1. The ambient temperature 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

Type

8132

8132

Item No.

313320

313322

Test load Fmax

500

500

N

Dimensions

Height

88.5

88.5

mm

Width

77

77

mm

Depth

44

44

mm

Opening width, max. with jaws

3

3

mm

Gripping of the specimen

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

Specimen dimensions

Flat specimen, thickness

0 ... 3

0 ... 3

mm

Round specimen, Ø

0 ... 3

0 ... 3

mm

Weight per specimen grip, approx.

0.25

0.25

kg

Connection, stud

Ø 8

Ø 8

mm

Ambient temperature

-70 ... +250

-15 ... +80

°C

Scope of delivery

2

2

pieces

Jaws supplied

Surface

Steel, smooth

Vulkollan, smooth

Gripping area

Height

23

23

mm

Width

16

16

mm

Hardness

200 HB

95 Shore A

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