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Shaft Materials
Most common shaft sleeve materials can be used with FEROFORM
bearings. The harder the shaft sleeve the better its resistance
to shaft wear.
Bronze: Phosphor Bronze, Admiralty Gun Metal, Nickel
Aluminium, Copper Nickel. Not recommended for abrasive
conditions.
Steel: Stainless Steel for water lube systems. Carbide
coated steel (tungsten or boron) for abrasive conditions.
Hardness: For normal operating conditions a typical
hardness of 160 - 200 Brinell. For abrasive conditions approx
300 Brinell.
Surface Finish: A finish of 0.8 micro metre (32 micro
inch RMS) is usual.
Bearing Design
FEROFORM bearings are designed to have an interference fit on
the 00. FEROFORM Bearings are designed to have a Running
Clearance in the Bore. Need to consider Bore Closure and Water
Swell
Machining:
FEROFORM is easily machinable on normal lathe machine.
Fitting Methods
Interference Fit:
• Freeze fitting or Press fitting
• Prevents bearing rotation or axial movement
• Provided intimate contact between the housing and bearing
Mechnical:
• Anti Rotation key • keeper bars • retaining rings • flange •
stepped housing
Adhesive:
• not preferred • used for thin walls where interference not
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