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Screw Tester Apparatus

Screw Tester Apparatus .

Screw Tester Apparatus

Technical Description of Screw Tester Apparatus

The main element of the unit is a slotted, elastically deformable steel block. By tightening the bolt joint, the slotted area is deformed, thereby generating an axial tension force in the bolt. The resulting deformation is recorded by a mechanical dial gauge, and is directly related to the bolt tension force generated. The bolt joint is tightened and slackened using a special torque wrench, which can be set sensitively with the aid of a threaded spindle. By using an axial bearing, the head friction of the bolt can be largely excluded, so that only the friction of the threaded joint is measured.

Specification of Screw Tester Apparatus

Experiment on the correlation between the tension force and tightening torque of bolts
Bolt size M8x100, wrench jaw size 13mm
Elastic deformation of a slotted block by the bolt
Determining the tightening and breakaway torque with a mechanical torque measuring device
2 position dial gauges
Sensitive torque setting by hand wheel

Technical Data of Screw Tester Apparatus

Tension force: max. 40kN
Force/travel constant: 20kN/mm (on slotted block)
Max. Tightening torque: 40Nm
Torque/travel constant: 10Nm/mm (on torque measuring device)
Position dial gauge: 0...10mm, graduations: 0,01mm

Dimensions and Weight of Screw Tester Apparatus

l x w x h: 450x400x260mm
Weight: approx. 27kg

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