Thread-forming in metal

KOBSERT®

Assembling thread inserts for metals

Thread reinforcement in metals

KOBSERT® thread inserts – highly resilient, vibration-resistant and torsion-proof

Our thread bushes are the ideal solution for creating highly resilient, vibration-resistant and torsion-proof nut threads in metal materials with low shear strength, such as aluminium, aluminium alloys or magnesium alloys.


Method / principle

When installing the thread inserts in the receiving part, the safety flange is pressed flat into the surface of the workpiece. This distorts the pipe-shaped neck area below the safety flange.
We can also supply the appropriate installation tools.

Applications

In the automotive industry KOBSERT® thread inserts are installed for example in engine mounting parts, gear connections, oil drain plugs and towing eyes. Other industrial applications include refrigeration and air-conditioning technology, electrical engineering or agriculture and garden technology.

Product benefits
  • Simple, cost-effective assembly
  • Installation tools for manual assembly and series production
  • Customer-specific automation solutions
  • Thread repair

Installation procedure

 

Core hole

Twist drills of the dimensions specified in the thread standard should be used for the mounting thread.
The core hole should not normally be countersunk. Deburring is permissible, but no greater in diameter than the nominal diameter of the mounting thread.
If KOBSERT® is used with a sealing ring or KOBSERT® HP, countersinking is always necessary.
 

Mounting thread

Metric ISO thread to DIN 13, cut with standard taps (6 H).
Standard DIN thread plug gauges should be used to check the accuracy to gauge.
 

Installation

Manual or motor-driven installation tools are available to install the thread insert.
The thread insert is screwed into the workpiece until the safety flange is resting on the surface of the workpiece. The installation procedure – pressing the safety flange into the workpiece – is carried out by a relative axial movement between the spindle, which has been screwed in, and the frontend assembly of the installation tool. The spindle is then removed again.
 

Removal

To remove KOBSERT® thread inserts from a workpiece, proceed as follows:
Use a twist drill (Ø = external thread diameter) to drill into the safety flange as far as the thread.
Lever out the safety flange using a triangular scraper or screwdriver.
Insert a tool for unscrewing – or a suitable triangular scraper if necessary – into the internal thread to permit a transmission of forces. Turn the bush to the left to remove it.
 

Reinstallation

Screw in a thread insert of the same specified size until the safety flange is in the same position as before – turn it back slightly if necessary – and press it flat into the surface with the installation tool in the usual way.

 

KOBSERT®

Thread inserts for metals

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Product variants

Every project deserves a tailor-made solution.

Learn more about the product types and find the right variant for your particular application.

Type S4 - S12

Manual installation tool with spindle drive for individual assembly (very small-scale production). It can be used to install all types of KOBSERT® thread inserts
(M 4 to M 12).

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HH 830

Manual installation tool with hydraulic-manual drive for small-scale production. It can be used to install all types of KOBSERT® thread inserts
(M 8 to M 30 x 1.5).

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P 2005 K

Mechanical installation tool with hydraulic-pneumatic drive for cost-effective series assembly. It can be used to install all types of KOBSERT® thread inserts
(M 4 to M 12 x 1.5).

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PH 830

Mechanical installation tool with hydraulic-pneumatic drive for large-scale production. It can be used to install all types of KOBSERT® thread inserts (M 8 to M 30 x 1.5).

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Downloads

Find out more: related downloads.

If you would like to know more, simply download the relevant brochures.

Title Language Version File Download
KOBSERT®
Thread inserts for metals
English 1000/14.01 1861 kB / PDF
English 1000/14.01 1861 kb / PDF

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