What's included One complete set: BK40 and BF40 bearing seats — everything needed to support a BK40/BF40 ball screw assembly. Key functions Provides rigid support and precise alignment for ball screw shafts and bearings. Ensures stable rotation of the screw, reducing wobble and uneven wear. Designed for direct replacement or installations in compatible ball screw systems. Construction and finish Made from bearing steel for durability and reliable longterm performance in mechanical applications. Blackened finish improves corrosion resistance and gives a consistent mating surface for accurate alignment. Performance benefits (why you need it) Improves machining accuracy by keeping the ball screw concentric under load. Reduces vibration and bearing stress, extending the life of the ball nut and screw. rigidity helps maintain repeatable motion and smoother operation in demanding environments. Compatibility and fit Specifically made for BK40 (fixed) and BF40 (flange) style bearing seat positions in ball screw systems. Fits assemblies that use BK40/BF40 support housings; ideal when replacing worn seats or building a drive stage. Typical applications (practical scenarios) 1. CNC routers and milling machines — worn support seats to restore spindle accuracy and reduce runout. 2. Industrial linear motion stages and machine tools — use as part of a ball screw assembly to maintain precise positioning under heavy loads. 3. Automated production equipment — install in actuator systems to ensure reliable, repeatable motion over long duty cycles. Why choose this set Complete set for BK40/BF40 support points means faster installation and correct pairing. Durable bearing steel and a blackened finish provide consistent fit and longterm reliability without frequent maintenance. Compatible with ball screw assemblies that use BK40 and BF40 bearing seat types. Use as direct replacements or in builds to improve alignment, stability, and service life of the ball screw system.