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Engine Bearings

Bimetal and trimetal bearings for crankshaft, camshaft and connecting rods with precision tolerances of 0.076 mm.

  • Bimetal > 8,500 psi · Trimetal > 11,500 psi
  • GB/T19001-2016 certified materials
  • Downloadable specification manual
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Engine bearings

The current design trend in internal combustion engines—smaller size, more power and torque output at lower speed—calls for support bearings with high resistance to pressure and wear. That is why CIC bearings are designed and manufactured to exceed the engine’s technical requirements.

CIC offers a wide range of support bearings for crankshafts, camshafts and connecting rods with perfect geometry (width and height), precision tolerances of 0.076 mm / 0.0003 in; very high conformability (the bearing adapts to the housing, with high-strength steels in the 160–200 HB hardness range); low-friction working surfaces; and metal-polymer coatings that provide high wear resistance, resulting in a long, trouble-free service life.

The materials used by CIC are certified (GB/T19001-2016) and meet the design requirements.

CIC therefore offers bimetal bearings rated above 8,500 psi and trimetal bearings rated above 11,500 psi, with working surfaces that keep friction low to maintain high engine efficiency.

Materials used in CIC bearings:

Gasoline or gas engines.

Base: steel. Support layer: AlCu (aluminum/copper alloy). Running layer: AlSn20Cu (aluminum/20 % tin/copper alloy). Overlay: PbCu (electroplated).

Diesel engines.

Base: steel. Support layer: CuPb (copper/lead alloy). Nickel barrier: NiCr (nickel/chromium alloy). Running layer: CuPb24Sn (copper/24 % lead/tin alloy). Overlay: Pb (electroplated).

Requirements for correct bearing operation:

  • Verify that the housing bore is within the service manual range.
  • Verify that housing out-of-round and taper are below the limit set by the engine manufacturer.
  • Verify that all housings are aligned along the engine’s longitudinal axis.
  • Verify that the shaft journal diameter is within the service manual range.
  • Verify that journal out-of-round and taper are below the limit set by the engine manufacturer.
  • Shaft deflection must be below the limit allowed by the service manual.
  • Shaft end play must be within the normal operating range.
  • Always use the engine oil specification given in the owner’s manual.