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TM 320: Screw Tester

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Screw Tester

Product Details


Technical Description 
 
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.
The well-structured instructional material outlines the fundamentals of the theory and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments

- Axial tension force in a bolt joint dependent on the tightening torque or
  the elastic deformation of a slotted block
- Measurement of the breakaway torque, including for different fitting
  situations of the bolt joint
- Measurement of thread friction and overall friction

Features
 
* Correlation between tightening torque and tension
  force on standardised bolts1
* Breakaway torque of a bolt joint

Specification

[1] Experiment on the correlation between the tension force and tightening torque of bolts
[2] Bolt size M8x100, wrench jaw size 13mm
[3] Elastic deformation of a slotted block by the bolt
[4] Determining the tightening and breakaway torque with a mechanical torque measuring device
[5] 2 position dial gauges
[6] Sensitive torque setting by hand wheel
[7] l x w x h 450x400x260mm

Technical Data

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

l x w x h : 450 x 400 x 260 mm
Weight : approx. 27 kg
 
Scope of Delivery

1 bolt tester complete with switchable ratchet, 1 set of bolts in transparent container, 1 set of instructional material

Order Details

040.32000  TM 320  Screw Tester

Alternative products
 
TM 310 -- Thread Efficiency Testing Equipment

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
E-Mail:
info@selkagmbh.com   |  Internet: http://www.selkagmbh.com

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