Bearing Materials Part 2

Bearing Materials Part 2

Bearing Materials Part 2

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At our Hydrostatic Pump Repair Site, we offer many types of Hydrostatic Transmission Repair and information relating to Hydrostatic Parts
Today we will discuss;

Bearing Materials Part 2

When you have good score resistance results in less hardness and strength in bearing materials. Lead and tin babbitts attributes are low fatigue and high comformability.  They are easily handled and are very low cost. And they are the most corrosion resistant of all the bearing materials.

Cadmium base alloys posses higher fatigue strength than the babbitt’s.  They do well in heavy duty applications, when they are used with steel journals, they have good score resistance. They are 50% stronger than thick babbitt bearings.

With their low corrosion resistance, which can be resolved by plating the surface of the bearing. They are not commonly used and they are very expensive and there are better materials out there.

Copper lead alloy bearings aid in the strength and fatigue resistance, while the lead is added for score resistance. They also have four times the fatigue resistance than that of a babbitt bearing. The biggest element they have going for them is their fatigue resistance under heavy pressure and high temperatures. Sadly they have low score resistance and comformability, than that of a babbitt bearing.

To compensate for this a thin layer copper lead alloy is used. It makes one of the highest load capacity, plain journal bearings of all. They use copper lead .010″ to .015″  thick to bond to a steel backing after they  use a lead babbitt overlay of .001″ is plated onto the copper lead layer.

 

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