What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are designed for a crankshaft that has been machined down by 0.50mm. This is typically done during an engine rebuild to correct wear on the crankshaft journals.

What is the construction of these main bearings?

These bearings feature a tri-metal construction. They have a steel backing for strength, an intermediate layer for conformability, and a babbit overlay that contacts the crankshaft and helps manage oil film.

Specifications

Brand: King Engine Bearings
Part #: MB7792SX0.5
UPC: 611500626876

King Engine Bearings Porsche 911 M97 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Porsche 911 M97 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-porsche-911-m97-size-0-50mm-main-beari-t14-771104
Price: 92.28 USD
Availability: BackOrder

$92.28

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King Engine Bearings Porsche 911 M97 main bearing set. Size +0.50mm.

Key Features

Main bearing set for Porsche 911 M97 engines.
Bearings are +0.50mm oversized, intended for machined crankshafts.
Features a tri-metal construction with a steel backing and babbit overlay.
The overlay material is designed for compatibility with different crankshaft finishes.
Steel backing offers structural strength for high-load applications.

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About this part

Product Details

These main bearings are built with a tri-metal construction, featuring a steel-backed overlay with a babbit overlay. This combination offers a strong foundation with excellent conformability to the crankshaft, helping to absorb shock loads. The +0.50mm sizing means these bearings are intended for a crankshaft that has been machined down by 0.50mm, which is a common practice when rebuilding or repairing an engine to bring worn journals back within specification.

King Engine Bearings uses a unique overlay material that is designed to be compatible with various crankshaft materials and surface finishes. This helps ensure consistent oil film support across a range of operating conditions. The steel backing provides the necessary structural integrity to handle the high loads experienced in the main bearing journals of a Porsche M97 engine.