Note: Shrink fitting aluminum pulley to insert inner bearing

Objective:

Heat aluminum pulley for insertion of an inner bearing for the automotive industry 

End Product:

pulley

Equipment:

Ambrell 2 kW induction heating system, equipped with a remote workhead containing two 0.33μF capacitors for a total of 0.66μF An induction heating coil designed and developed specifically for this application.

Materials:

Aluminum pulley 2.3 in (60 mm) OD x 1.6 in in (40 mm) ID x 1 in (27 mm) high and inner bearing 0.7 in (17.8 mm) high x 1.6 in (40 mm) dia

Temperature:

464 °F (240 °C)

Frequency:

283 kHz

Testing:

A three turn helical coil is used to heat the aluminum pulley. The pulley is heated to 464 °F (240 °C) in 20 seconds to expand the inner diameter and then the inner bearing is inserted to form the completed part.

Benefits:

  • Defined and controlled heat pattern

  • Process easily integrated into automated system

  • Even distribution of heating

Shrink fitting aluminum pulley to insert inner bearing

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