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Main engine bearings

bearing materials: whitemetal used in both thick and thin shell bearings, Tin aluminum(AlSn40) used only in thin shell bearings. Thick shell bearings- clearances can be adjusted using shims they
are 30-60mm thick used in main bearings only, Thin shell bearings must have wall thickness of about 2-2.5% journal dia.They have crush or nip.
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