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90% White Metal Bearings
Performance Benefits:

. Lowers Lub. Oil Consumption

. Maintains specified fuel Consumption for longer service

. Can be used against hardened as well as unhardened shaft

. Protects shaft from extensive damage

Special Features

Reduces operating cost Considerably.

. Lined with Genuine Tin Base 90% While Metal

. Retains Lubricants

. Embeds dust and debris carried by the Lubricant and prevents scoring at high loads

. Highly compatible to avoid seizure

. Conforms to misperfection in Shaft geometry

. High Strength to resist deformation by both steady & fluctuating loads

. Resists corrosion by lubricants

. Good thermal conductor, dissipates heat faster from the mating surface and runs cool

. Excellent resistance to wear under conditions imposed in journal

Copper-Lead Bimetal Bearings & Bushes (CUPB)

  Copper Powder Metallurgy for Bearings:

. Copper readily forms a protective oxide film when heated in air.

. Copper readily forms a protective sulphide film with oils containing only traces
  of sulphur compounds.

. Copper has a high thermal conductivity for the dissipation of the frictional heat,
  thus reducing the surface temperature.

. Tin strengthens copper and hardens it sufficiently to be compatible
  with unhardened steel.

. The protective Organo-tin films formed with oils have a high
  desorption temperature

. Hence the copper-tin bronzes result in better bearings than the
  copper-zinc brasses.

. Copper alloys usually have a face-centered-cubic structure while the
  mating surface is usually a ferrous alloy with a body-centered-cubic structure.
  This difference contributes to the anti-seizure characteristics of copper
  alloys against iron alloys.

  Overlay Plated Copper-Lead Bearings for Heavy Duty Service:

. The Copper-Lead Bearings when plated have higher load carrying capacity
  than straight copper-lead alloys.

. These overlays are very soft and have excellent embeddability,
  conformability and corrosion resistance without impairing higher fatigue
  strength of inner copper-lead-tin alloy.

Different Layers in typical overlay plated bearing are as under:

. The steel backing to give the bearing
  strength and regidity.

. The copper-lead-tin intermediate, alloy lining
  is permanently bonded to the steel back by
  intering process. It is the lining alloy that will   stand up under extreme bearing loads.

. A nickel plate or nickel barrier - just 2-3
  microns thick - preventing the tin

  from overplate alloy from being drawn into copper-lead alloy lining.

. The lead-tin-copper plate that easily confirms to slight irregularities
  in the crankshaft journals during engine run-in.

. The pure tin flash plate which provides corrosion and rust resistance all over.

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