Description
Overview:
The Big End Bearing R3 (30.975 mm) Undersize is a genuine M.A.G component designed for the 1026 and 1029 SRL engines. Supplied as unused vintage stock, it is intended to restore correct running clearance on a crankpin that has been ground undersize, helping the connecting rod run smoothly on the crankshaft. Manufactured with a steel-backed bearing alloy for strength and a stable oil film, it reduces friction, heat, and wear under sustained load. OEM No. 0529 039 ensures the correct geometry and fit for these classic engines. Ideal for keeping older equipment dependable, this bearing supports consistent oil pressure and reliable performance while respecting original specifications. As old stock, minor tarnishing or storage marks may be present without affecting function.
Key Features:
- Genuine M.A.G part for assured compatibility and fit on specified engines
- 30.975 mm undersize to suit ground crank journals and restore correct oil clearance
- Steel-backed bearing alloy for strength, heat stability, and wear resistance
- Helps reduce friction and vibration for smoother, quieter engine running
- Maintains oil film integrity under load for dependable service life
- Suitable for maintaining and preserving vintage engine performance
- Supplied as unused old stock; functional integrity retained despite storage ageing
- Straightforward like-for-like replacement when servicing the big end assembly
Typical Applications:
Used during engine rebuilds or repairs on M.A.G 1026 and 1029 SRL units where the crankpin has been reground and requires an undersize bearing. Suitable for restoring reliability in vintage industrial engines commonly found in older construction, agricultural, or general-purpose machinery, helping them start easily, run smoothly, and last longer between services.
Also known as:
Big-end shells, connecting rod bearing, con-rod bearing shells, crankpin bearing, rod bearing inserts, crankshaft big-end bearing. These terms describe the same component that supports the con-rod at the crankshaft journal and controls oil clearance at the big end.
Fits Models:
1026, 1029 SRL, 1029SRL, 1029 SRL
Alternate Part Numbers:
0529 039, 0529039
Product Specifications
| L&S Part No. | 0529 039 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | M.A.G |
| Unit of Sale | 1 |
| Applications | 1026, 1029 SRL, 1029SRL, M.A.G 1029 SRL |
| Machine Type | Engines |
| Fits Brands | MAG |
| Fits Models | M.A.G 1029 SRL | M.A.G 1026 SRL |
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