Free Running Thread Inserts

Product Description

Thread Reinforcement

Low strength material such as aluminium, fibre-reinforced plastics (FRP), iron castings and magnesium alloys have poor threading properties and the threads created in these materials tend to wear out quickly. This problem can be rectified by thread reinforcement which is typically performed using threaded inserts. Threaded inserts not only provide a strong thread in materials with difficult machining characteristics, but they also reduce the amount of material required by being able to use screws and bolts of smaller diameters and shorter lengths. This is made possible by the high thread resilience of BaerCoil thread inserts which save material usage by up to 10-30%. This results in a reduction of weight and space which is often crucial in aerospace and automobile industries. The saving of material also minimises the total cost of production.

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Principle

The diameter of the leading coil reduces due to the torque applied to the tang during assembly to allow it to enter the tapped thread

• The coils then expands with a spring-like action anchoring the insert permanently in place against the tapped hole.

• The helical insert automatically adjusts itself, radially and axially, to any expansion or contraction of the parent material.

• No staking, locking, swaging, keying, nor interference fit is required to retain helical thread inserts

• Eliminates stress concentration in parent material.

• UNC: 2-56 to 1"

• BSW: 3/16 to 1"

• UNF: 6-40 to 1"

  • Fine pitch inserts available

  • BSP and NPT available on request