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Rotary Hinge

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Advanced Materials Technology
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Rotary Hinge
Benefit: Increased Component Complexity
Main Forming Process: Metal Injection Moulding
End Use Sector: Consumer Goods
Material: Ferrous

Finishing: Shot peening, passivation, sizing


A normal clamshell phone provides more space for a bigger display than a Candy-bar phone, but clamshell phones with the rotary hinge help to create more viewing angles. The 2-degree-of-freedom movement made possible by the rotary hinge gives the consumers a swivel screen that fulfils the function of the phone and the camera.


The characteristics of MIM in high strength, complex geometry and high volume production, enables it to be the preferred manufacturing technique for such metal hinges in consumer electronics. In particular, the use of rotary hinge allows the manufacturers to differentiate its products through strength, reliability and style. In essence the rotary MIM hinge portrayed a very strong product differentiation, and an ingenuity that will inspire others.

Component Specification

Weight (g): Sintered part: Shaft (1.652), Plate (1.639)
Density (g/cm3): 7.6
Tensile Strength (MPa): 950 as sintered
Hardness (HRC): 25

The information contained in these case studies is provided by third parties and although EPMA does its best to ensure the case studies are accurate it is not liable for any mistakes or wrong information

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