Description
Overview:
Big End Shells Undersize 020 to fit the JAP Model 6 are genuine JAP bearing inserts designed for the connecting rod big-end on vintage JAP engines. Supplied as unused old stock, they offer period-correct authenticity for restorations while delivering dependable service. The shells are steel-backed with a precision bearing surface to restore correct oil clearance on a reground crankpin. The 0.020 in undersize (approx. 0.50 mm) suits crankshafts machined to that specification, helping to eliminate knock, reduce friction, and maintain stable oil film. Made for the JAP Model 6 (also known as JAP 6), these parts are intended as a direct-service replacement when the crank journal has been ground to -0.020 in (-0.50 mm). OEM number 18675 020 confirms correct specification and fitment.
Key Features:
- Genuine JAP part for assured compatibility and fit on the Model 6
- 0.020 in undersize (0.50 mm) for use with a reground crankpin
- Durable steel-backed construction with precision bearing lining
- Helps restore correct oil clearance and smooth, quiet running
- Supports reliable lubrication and reduced wear in service
- Direct replacement design for straightforward installation by competent fitters
- Suitable for heritage engine restorations and ongoing maintenance
- OEM reference 18675 020 aids accurate identification
- Supplied as unused old stock; may show minor storage marks without affecting function
- Ideal for enthusiasts, workshops, and specialist rebuilders seeking authentic parts
Typical Applications:
Used during engine rebuilds where the JAP Model 6 crankpin has been ground to -0.020 in (-0.50 mm). Common in restoration of stationary and small plant engines powering pumps, generators, compact construction equipment, and period machinery. Replaces worn big-end bearings to restore oil pressure stability, reduce vibration, and extend engine life.
Also known as:
Big-end bearings, con-rod shells, connecting rod bearings, rod bearings, crankpin shells, bearing inserts, engine bearing shells, big-end inserts, undersize big-end shells.
Fits Models:
JAP 6, JAP Model 6, JAP6, JAPModel6
Alternate Part Numbers:
18675020
Product Specifications
| L&S Part No. | 18675 020 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 18675 020 |
| Unit of Sale | 1 |
| Applications | JAP 6, JAP Model 6, JAP6, JAPModel6 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Fits Models | JAP 6 |
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