Specimen Grips for Testing Screws 

We firmly grip all screws

Positive clamping-force transmission via shouldered, screw or threaded heads. The specimen plus appropriate holder is inserted into the grips, which are freely accessible from in front, and is automatically centered in the tensile axis.

16x9-typ-8496-50-kn-threaded insert-makroxtens-fo

Significant Advantages and Features

  • Specimen grips with Fmax 50 kN and 250 kN are available.
  • Specimen holder anti-backlash option ensures that the specimen is held securely, minimizing holder recoil at specimen break.
  • Low overall height saves space in the test area.
  • Positive clamping solution eliminates need for additional ancillary units.
  • Strain rate control in accordance with standards DIN EN ISO 6892-1:2009 and ASTM E8 – 09.

Specimen Grips for Testing Screws 

Fmax to 50 kN

Advantages and features

  • Absolute symmetrical force distribution is ensured through various design details.
    • Anti-backlash option for specimen holders: Play-free specimen location enables precise alignment in the tensile axis — essential for use with optical extension measurement systems.
    • Symmetrical bearing surfaces in the specimen grips: The specimen holders bear on two symmetrical contact surfaces in the specimen grips.
    • Specimen fully enclosed by all specimen holders: All specimen holders completely surround the specimen. A support sleeve is placed around the split holders for dumbbell specimens.
  • This also prevents them from spreading, minimizing holder recoil at specimen break.
  • Low overall height saves space in the test area.
  • Pure Mechanical solution: Pneumatic control unit and hydraulic power pack are not required.

Range of application

  • Specimen material:
    Steel, non-ferrous metals, plastics
  • Specimen shape/type of loading/standards:
    Tensile test for
    • Threaded fittings to DIN 50125 shape B and ISO 6892
    • Screws with a plane head support (e.g., to EN ISO 4762, EN 24017, DIN 6912) in accordance with DIN EN ISO 898-1 (straight tensile test)
    • Dumbbell specimens to DIN 50125, shape C
    • Dumbbell specimens to GOST 1497

Technical data

Item no.

320717

Type

8496

Tensioning

Yes

Test load, max. (Fmax)

50

kN

Height without inserts

197

mm

Outer diameter

88

mm

Mains supply

Ø 36

mm

Ambient temperature

-70 to +250

°C

Scope of delivery

2

pieces

Specimen Grips for Testing Screws

Fmax 250 kN

Advantages and features

  • Absolute symmetrical force distribution is ensured through various design details.
    • Anti-backlash option for specimen holders: Play-free specimen location enables precise alignment in the tensile axis — essential for use with optical extension measurement systems.
    • Symmetrical bearing surfaces in the specimen grips: The specimen holders bear on two symmetrical contact surfaces in the specimen grips.
    • Specimen fully enclosed by all specimen holders: All specimen holders completely surround the specimen. A support sleeve is placed around the split holders for dumbbell specimens.
  • This also prevents them from spreading, minimizing holder recoil at specimen break.
  • Full flexibility: Specimen grips can be mounted on their own or to existing test tools via various connection options. Specimen grips for Type 8496 can be used for specimen holder Type 8596 via an adapter.
  • Low overall height saves space in the test area.
  • Pure Mechanical solution: Pneumatic control unit and hydraulic power pack are not required.

Range of application

  • Specimen material:
    Steel, non-ferrous metals, plastics
  • Specimen shape/type of loading/standards:
    Tensile test for
    • Threaded fittings to DIN 50125 shape B and ISO 6892
    • Screws with a plane head support (e.g., to EN ISO 4762, EN 24017, DIN 6912) in accordance with DIN EN ISO 898-1 (straight tensile test)
    • Screws to DIN EN ISO 898-1 DIN EN ISO 898-1 (wedge tensile test)
    • Dumbbell specimens to DIN 50125, shape C
    • Dumbbell specimens to GOST 1497

Technical data

Item No.

021816[1]

021821

Test load, max. (Fmax)

250

250

kN

Type

8596

8596

Operating principle/identification

Positive clamping-force transmission

Positive clamping-force transmission

Strain

Yes

No

Height without inserts

154

100

mm

Outer diameter, max.

137

137

mm

Weight per specimen grip (without specimen holder), approx.

8

6.5

kg

Connection diameter

Various connections

Various connections

Ambient temperature

-70 to +250

-70 to +250

°C

Scope of delivery

2

2

pieces

  1. Recommended and approved for strain rate control in accordance with standards DIN EN ISO 6892-1:2009 and ASTM E8 – 09.
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