Overview
The TB48 billet crankshaft with a 108 mm stroke and knife-edge design (STD journal) offers several high-performance features ideal for motorsport or high-output builds. It is machined from aerospace-grade 4340 billet steel, providing superior strength and durability compared to cast or forged options. The crankshaft is knife-edged along the counterweights to reduce windage losses at high RPM, improving engine efficiency and responsiveness. Precision CNC machining ensures accurate balance and fitment, while drilled and tapped oil passages enhance lubrication and bearing life under extreme load. Many versions are nitrided for added surface hardness and undergo stress relief, magnaflux inspection, and shot peening to increase fatigue resistance and reliability in demanding applications.
Features
- Made from 4340 billet steel for exceptional strength and durability
- 108 mm stroke for increased displacement and torque potential
- Knife-edged counterweights reduce windage and improve high-RPM efficiency
- Standard journal sizing allows compatibility with OEM-style rods and bearings
- CNC machined for precise balance, fitment, and performance
- Drilled and tapped oil passages for improved lubrication and bearing longevity
- Nitrided surface treatment enhances wear resistance and surface hardness
- Shot-peened and stress-relieved for greater fatigue resistance
- Magnaflux inspected to ensure structural integrity and detect micro-cracks