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.
TM 320 Screw connections testing
Features
- correlation between tightening torque and tension force on standardised bolts
- breakaway torque of a bolt joint
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
Scope of delivery
1 experimental unit
1 set of bolts in transparent container
1 set of instructional material
Accessories
optional
WP 300.09 Laboratory trolley
Description
Technical details
Specification
- 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 dial gauges
- sensitive torque setting by hand wheel
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)
Dial gauge
- 0…10mm
- graduation: 0,01mm
Dimensions and weight
LxWxH: 450x400x260mm
Weight: approx. 27kg
Order number: 040.32000
Media
Knowledge
Lab proposal
Solid mechanics lab proposal Pdf
Accessories
TM 320
