Specimen grip for steel strip cord

These pneumatic grips for yarn and tire cord are single-actuator grips for clamping fibrous or filamentary tensile specimens.

The grips are especially suitable for steel tire cords to BISFA. The load-reduction curve with 270° deflection gently reduces the tensile force before the clamping point. Pneumatic clamping ensures constant gripping force with easy, reproducible adjustment. The specimen is held securely and jaw breaks are avoided.

Grips employing deflection (capstan grips)

Key Advantages and Features

  • With pneumatic end clamping the gripping force remains constant, allowing high specimen throughput.
  • Automatic centering of specimens via guide grooves in the load reduction curve.
  • No transverse forces are transmitted to the load cell via the specimen grips.
  • The symmetrical weight distribution allows the center of gravity of the grips to be near the tensile axis.
Image-Article_Stahlstreifencorde

Specimen grip for steel strip cord

  • Specimen material:
    metals, plastics, textiles
  • Specimen shape:
    yarn, cord, multifilaments, rovings
  • Type of loading:
    tensile
  • Standard:
    to BISFA 2002

Advantages and features (steel strip cord)

  • The symmetrical weight distribution allows the center of gravity of the grips in the tensile axis. No transverse forces are transmitted to the load cell via the specimen grips.
  • A guide groove is integrated into the load reduction roller and basic unit for thread feeding, allowing fast and convenient specimen feeding and automatic and precise positioning in the tensile axis.
  • Force reduction curve employing 270° deflection reduces the tensile force on the end-clamping position. Thus the required closing force can be reduced at end clamping for specimens that are sensitive to clamping. The closing force is progressively loaded at end clamping, thereby securely holding the specimen and preventing jaw breaks during the test.
  • The load reduction radius is reduced seamlessly via the involute form of the load reduction roller.
  • The ends are clamped pneumatically, ensuring that the gripping force remains constant even with diminishing specimen diameter.
  • Easy and convenient opening and closing via pneumatic control unit allowing high specimen throughput.

The grips are especially suitable for steel tire cords to BISFA.

Technical data, Fmax 10 kN

Type

8397

Item No.

012415

Operating principle/identification

Pneumatic, single-side closing

Test load Fmax

10

kN

Gripping force at 6 bar

30

kN

Gripping force at 10 bar

50

kN

Operating pressure

1 ... 10

bar

Dimensions

Height

220

mm

Width

369

mm

Depth

113

mm

Depth with connection unit

157

mm

Opening width, max. with jaws

5

mm

Connection, stud

Ø 20

mm

Weight per specimen grip, approx.

12.5

kg

Ambient temperature

+10 ... +35

°C

Scope of delivery

2

pieces

Supplied load reduction curve

Length per load reduction curve

330

mm

Deflection

270

°

Jaws supplied

Surface

Steel, smooth, hardened

Length

60

mm

Hardness

58 HRC

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