BB4/BB6 Prelude Front Radius Rod Bearings


The BB4/BB6 Prelude front radius rod spherical bearing set was designed to overcome the deficiencies inherent in most of the current offerings on the market while still remaining SCCA IT legal. This all starts with proper bearing selection. What causes premature bearing wear and play in this application is high axial loads. Axial load is that load being transmitted through the center of the bearing ball parallel to the front radius rod itself. Essentially, under acceleration and especially under braking the load is attempting to push the ball out of the bearing race.

Our solution is to use a wider, higher end bearing with vastly higher axial load ratings and a much higher end PTFE liner than the competition uses. The NHBB (New Hampshire Ball Bearing) ABWT12 bearing that we use in this application has a maximum axial load rating of 11,595 lbs, uses an extremely high end PTFE liner and is MIL-SPEC rated.

We use 4140 HT (Heat Treated) steel for the bearing housing as well as the rear bolt plate. We use 7075 AL for the four bearing spacers. A shoulder is used at one end of the ID of the bearing housing to give a positive stop when pressing in bearings and to reduce the risk of accidental disassembly. Bearings are then loctited and pressed in the housing and a c-clip at one end provides triple redundancy.

Bearing Technical Specifications – NHBB ABWT12
- Radial Static Limit Load Capacity Lbs: 78,500
- Axial Static Limit Load Capacity Lbs: 11,595

This product is a low volume seller and thus not always kept in stock but can be made to order. Please Contact Us for details.

Price: $270.00