Roller Grips

Grips for expert belt testing

The gripping force is generated by self-gripping via multiple looping and exact strain measurement is performed using optical extensometer systems.

Key Advantages and Features

Advantages and features

  • Ergonomic design for fast, easy specimen insertion
  • Low overall height of the specimen grips allows specimens with large elongations to be tested.
  • Suitable for tests in temperature chambers
  • The grips are suitable for clamping-sensitive specimens.

Operating principle

These roller grips are used for testing tensile strip specimens.

In tests with these grips optical extensometers are used for accurate strain measurement.

The self-clamping action of the grips is generated by multiple looping of the specimen and the application of tensile force.

The specimen is inserted into a split roller from the front. The looping occurs with the rotation of the roller.

The specimen grip locking bars are monitored for safety in conjunction with the machine electronics.

The specimen is fed into the slotted roller via a load-reduction curve.

Application description

  • Specimen material:
    textiles
  • Specimen shape:
    strips (belt, strap)
  • Type of loading:
    tensile

Technical Overview

Roller grips are available with a maximum force measurement range of 2.5 kN to 250 kN.

Fmax 2.5 kN

Type

8263

Item No.

313438

Test load Fmax

2.5

kN

Dimensions

Height

90

mm

Width

58

mm

Depth

39

mm

Roller diameter

20

mm

Roller width (= clamping width)

40

mm

Roller surface

steel, smooth

Specimen thickness, max.

2

mm

Specimen length, min.

500

mm

Weight per grip unit, approx.

0.4

kg

Connection, pin

Ø 20

mm

Ambient temperature

-70 to +250

°C

Scope of delivery

2

pieces

Fmax 50 kN

Item No.

313630

316958

Type

8464

8464

Test load Fmax

50

50

kN

Dimensions

Height

150

155

mm

Width

130

190

mm

Depth

130

130

mm

Roller diameter

30/100

38/100

mm

Roller width (= clamping width)

60

120

mm

Roller surface

Steel, smooth

steel, smooth

Specimen thickness, max.

4

4

mm

Specimen length, min.

1000

1000

mm

Weight per grip unit, approx.

6.5

9

kg

Connection, pin

Ø 36

Ø 36

mm

Ambient temperature

-40 to +250

-40 to +250

°C

Scope of delivery

2

2

pieces

Fmax 100 kN (looping around 2 rollers)

Type

8563

Item No.

315276

Test load Fmax

100

kN

Dimensions

Height

250

mm

Width

235

mm

Depth

155

mm

Roller diameter

60

mm

Roller width (= clamping width)

110

mm

Roller surface

steel, smooth

Specimen thickness, max.

4

mm

Specimen width, max.

-

mm

Specimen length, min.

1400

mm

Weight per specimen grip, approx.

11

kg

Connection, pin

Ø 60

mm

Ambient temperature

-40 to +250

°C

Scope of delivery

2

pieces

Fmax 100 kN and 250 kN (looping around 1 roller)

Item No.

313748

313840

Type

8564

8566

Test load Fmax

100

250

kN

Dimensions

Height

210

270

mm

Width

260

400

mm

Depth

170

230

mm

Depth with lever

233

305

mm

Roller diameter

100

130

mm

Roller width (= clamping width)

110

220

mm

Roller surface

steel, pr[1] 1 mm

steel, pr[1] 1.5 mm

Specimen thickness, max.

8

10

mm

Specimen width, max.

-

220

mm

Specimen length, min.

1000

1000

mm

Weight per grip unit, approx.

24

63

kg

Connection, pin

Ø 60

Ø 60

mm

Ambient temperature

-40 to +250

-40 to +250

°C

Scope of delivery

2

2

pieces

  1. Abbreviations: Pr = diamond pattern
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