Description
Overview:
The Big End Shells Undersize 010 are precision bearing shells for the connecting rod big-end on JAP small engines. As a Genuine JAP Part (MPN 18685/010), they are manufactured to OEM tolerances using a durable bearing-grade alloy on a rigid steel backing for stable support under load. Their undersize specification of 0.010 in (0.25 mm) is intended for crankshafts that have been reground to the matching dimension, restoring correct oil clearance and reliable lubrication. Suitable for engine repair and overhaul, they are designed to fit JAP 2A and JAP 2P engines commonly found in compact construction and garden machinery, helping to reduce knock, protect the crankpin journal, and return engines to smooth, efficient running.
Key Features:
- Genuine JAP OEM component for assured compatibility and quality (MPN 18685/010)
- 0.010 in undersize (0.25 mm) for use with reground crankshafts
- Precision-machined shells to restore correct oil clearance and load distribution
- Bearing alloy with steel backing for strength, wear resistance, and heat stability
- Consistent shell crush and geometry for secure seating in the connecting rod
- Helps reduce big-end knock and vibration when fitted to a correctly sized journal
- Direct replacement to OEM spec for a straightforward fit with standard workshop tools
- Supports reliable oil film formation for extended crankshaft and rod life
- Suitable for professional rebuilds and careful DIY maintenance
- Compatible with JAP 2A and JAP 2P engines
Typical Applications:
Used during engine overhauls, routine maintenance, or targeted big-end repairs on JAP stationary engines in compact construction and garden equipment. Typical scenarios include restoring oil pressure and quiet running after journal regrind, addressing bearing wear, and preventing crankpin damage on mixers, pumps, generators, rollers, or similar machinery powered by JAP 2A/2P engines.
Also known as:
Big-end bearings, con-rod shells, conrod bearings, rod bearings, crankpin shells, undersize shells, 0.010 bearings, engine bearing shells, connecting rod bearing inserts, crankshaft big-end shells.
Fits Models:
JAP 2A, JAP 2P, JAP2A, JAP2P
Alternate Part Numbers:
18685
Product Specifications
| L&S Part No. | 18685/010 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 18685/010 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Key Features | - 0.010 in undersize for reground crankshafts - Compatible with JAP 2A and JAP 2P engines - Bearing-grade alloy with steel backing - Precision-machined for correct oil clearance - Genuine JAP OEM component (MPN 18685/010) |
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