breakaway torque of a bolt joint

 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.

Technical details:

Specifications:

• 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:
  • 40kN
• Force/travel constant:
  • 20kN/mm (on slotted block)
• tightening torque:
  • 40Nm
• Torque/travel constant:
  • 10Nm/mm (on torque measuring device)
• Dial gauge:
  • 0…10mm
  • graduation: 0,01mm

Dimensions & Weight:

• L x W x H: 450x400x260mm
• Weight: approx. 27kg

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

Features:

• correlation between tightening torque and tension force on standardised bolts

Accessories:

·         optional:

–      WP 300.09 Laboratory trolley

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.