Case Bearing Conversion Tool - Timken Tw - JIMS USA

Specifications

The JIMS USA 959 Case Bearing Conversion Tool is engineered for precision and durability in engine modifications. It features a chrome-moly steel bearing insert that provides superior strength compared to the original aluminum case material. This insert is machined to exact tolerances, held to under .0002" total indicator reading (TIR), ensuring a precise fit and reliable performance. The complete kit includes a press plate for accurate alignment, along with various drill bits, drill stop collars, screws, a roll tap, base installer, tap guide, Loctite, and Tap Magic for comprehensive installation.

Key Features

• Precision-Machined Components: All elements of the tool kit are precision-machined, ensuring accurate installation and optimal bearing alignment.
• High-Strength Bearing Insert: Includes a robust, aerospace-quality steel insert, significantly stronger than the stock aluminum crankcase material, enhancing structural integrity.
• Comprehensive Installation Kit: The kit provides specialized drill bits for oil feed and return holes, along with a roll tap, guide, and all necessary hardware for a complete conversion process.
• Engineered for Durability: Designed to facilitate the upgrade to a more robust Timken tapered roller bearing, which is known for its ability to withstand higher loads and reduce crankshaft movement.

Applications

This Case Bearing Conversion Tool is specifically designed for upgrading the left-side crankshaft roller bearing to a more durable Timken bearing in Harley-Davidson Twin Cam engines from 2003 and later. It is particularly beneficial for high-performance motorcycle engine builders and enthusiasts undertaking major engine upgrades, such as increasing bore size or stroke, where enhanced crankshaft stability is critical. The tool enables the precise installation of the Timken bearing insert and subsequent bearing, addressing common concerns regarding crankshaft runout and bearing longevity in modified or stock 88", 96", and 103" Twin Cam engines. It can also be utilized for M8 engine conversions.

Benefits

• Enhanced Engine Reliability: Converting to a Timken tapered roller bearing significantly improves the rigidity of the engine's lower end, reducing crankshaft runout and preventing premature bearing failure, especially under high-stress conditions.
• Increased Performance Support: Provides the necessary foundation for high-performance builds by stabilizing the crankshaft, allowing the engine to handle increased horsepower and torque more effectively.
• Precise and Consistent Installation: The specialized tools and detailed instructions ensure that the bearing conversion is performed accurately, minimizing errors and potential damage to critical engine components.
• Long-Term Durability: The use of an aerospace-quality steel insert creates a stronger bearing seat than the factory aluminum case, extending the lifespan of the crankshaft bearing assembly and the engine itself.