European Powder Metallurgy Association

Locking Device for Spectacles MIM

Locking Device for Spectacles

Company: OBE Ohnmacht & Baumgärtner GmbH

Density: 7.9 g/cm3
Hardness: 120 HV10
Weight: 0.028g / 0.046g depending on version
Tensile Strength: 510 MPa

For this revolutionary and extremely small locking device for spring hinges in spectacles the minimized size is combined with a complex shape. For a safe locking function the geometry of the part had to be designed with special features and produced in large volumes.

The component was designed from the beginning to be made using MIM, as its weight of only 0.028g and high precision, meant only MIM could guarantee the necessary specification. This is also due to the huge quantity per year needed using a 32 cavity mould.


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