These Big End Shells are undersize 0.030 in (0.76 mm) bearings for the JAP Model 6 engine. They are genuine Villiers components, supplied as unused old stock for authentic restoration work. The shells are precision-made metal bearing inserts designed to sit in the connecting rod big end and run on the crankpin, restoring the correct oil clearance after a crank regrind to 0.030 in undersize. Built for durability and consistent oil film support, they help reduce knock and wear, improving smooth running and longevity. Ideal for classic stationary and small plant engines, they provide a direct replacement that matches original specifications on JAP Model 6 units, making them suitable for both enthusiasts and professional rebuilders seeking reliable, period-correct parts.

Key Features:
– Genuine Villiers part for correct fit and authenticity
– 0.030 in (0.76 mm) undersize to suit reground crankpins
– Precision bearing geometry for stable oil clearance and smooth running
– Durable construction for sustained load and temperature performance
– Suitable for restoration and regular service of vintage JAP engines
– Unused old stock; may show cosmetic tarnishing without affecting function
– Helps reduce big-end knock and improves engine reliability
– Made to original specification for consistent, repeatable results
– Straightforward to fit during a standard big-end overhaul
– Supports long service life when used with clean oil and correct torque

Typical Applications:
Used during rebuilds of JAP Model 6 engines where the crankpin has been ground to 0.030 in (0.76 mm) undersize. Common in restoration of classic machinery, stationary engine displays, vintage equipment kept in working order, and small plant such as pumps, generators, or mixers powered by JAP 6 engines.

Also known as:
Big-end bearings, big-end shells, con-rod shells, rod bearings, crankpin shells, bearing inserts, BE shells, journal shells.

Fits Models:
JAP Model 6, JAP 6

Alternate Part Numbers:
18475030

Product Specifications