Description
Overview:
The Main Bearing Undersize 0.020 in (0.51 mm) for Lister ST and STW diesel engines is a precision-engineered engine bearing shell designed to support the crankshaft and maintain the correct oil clearance after a crank regrind. Manufactured from a robust steel-backed bearing alloy with an anti-friction lining, it helps reduce wear, stabilise oil pressure, and ensure smooth, reliable running. Suitable for a wide range of site and industrial equipment powered by Lister engines, this component is used during engine overhauls or corrective maintenance when journals have been machined to an undersize. Often referenced as 570-10970/020 or 570 10970/020, it provides a dependable replacement option that fits accurately within the main bearing housings of compatible Lister ST and Lister STW engines.
Key Features:
- 0.020 in (0.51 mm) undersize for reground crankshaft journals
- Steel-backed bearing alloy for strength and long service life
- Precision-machined to maintain correct oil film and clearances
- Reduces friction and wear to protect crankshaft and block
- Helps maintain stable oil pressure and quiet engine operation
- Consistent geometry for reliable fit in Lister ST/STW main housings
- Suitable for rebuilds, overhauls, and preventative maintenance
- Installs using standard workshop tools and procedures
Typical Applications:
Used during engine rebuilds of Lister ST and STW units fitted to site generators, pumps, compressors, welders, mixers, and other small plant. Ideal when the crankshaft has been ground by 0.020 in (0.51 mm) to restore correct bearing clearances. Helps extend engine life, improve running smoothness, and reduce the risk of low oil pressure or bearing knock in demanding construction and industrial environments.
Also known as:
0.020 in undersize main bearing, 20 thou undersize main bearing shells, −0.50 mm main bearing, crankshaft main bearing shell, engine main bearing for Lister ST/STW, U/S 0.020 main bearing, undersize crank main bearing.
Fits Models:
Lister ST
Lister STW
Product Specifications
| L&S Part No. | 570 10970/020 |
|---|---|
| Unit of Sale | 1 |
| Machine Type | Engines |
| Key Features | - 0.020 in undersize for reground crankshaft journals - Steel-backed bearing alloy for strength - Precision-machined for correct oil film and clearances - Fits Lister ST and STW engine main housings - Suitable for rebuilds and preventative maintenance |
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