King's TechLab - Excel and Exceed

TechLab is our starting point for exploring new technologies. It’s where our new products and features are designed, tested and validated.

Our TechLab R&D culture focuses on constant analysis of what can be done to support ever increasing race engine loads, and how to improve bearing durability. One of those technologies is Bull’s Eye Tolerance™.

Typical race bearings are manufactured to meet the industry’s traditional +/- 0.00025 ” wall thickness tolerance. But race engine builders often prefer narrow, more specific oil clearances with far more tolerance control.

To achieve the right clearance, they compensate for bearing thickness inconsistencies by grinding cranks “fat” or “thin”, adjusting the housing bore, or purchasing multiple sets to “fish” for shells. The process is time consuming, costly and tedious.
King listened to its engine building customers and responded with Bull’s Eye Tolerance™

Bull’s Eye Tolerance™ is a production technology developed by King. It combines highly accurate machining, overplating, and computerized wall thickness monitoring that adjusts the process on-the-spot.

Bull’s Eye Tolerance™ outperforms the industry’s wall thickness tolerance, ensuring the least thickness variation shell-to-shell. The outcome: A new standard in bearing thickness consistency.

With Bull’s Eye Tolerance™:

• No more multiple set purchases or “fishing” for bearings to reach right clearance
• No need to grind cranks “fat” or “thin”
• No need to adjust housing diameter
• Less taper across the bearing face

Click Here for the Application Guide Find Your Set - King Catalog
Bull’s Eye Tolerance ™ benefits:
  • 24% greater load capacity
  • 17% more fatigue resistance
  • Compatible with all crankshafts
Bull’s Eye Tolerance ™ On Youtube