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KG Thrust Ball Bearings
overview
Thrust Ball Bearings
KG Thrust Ball Bearings are engineered to accommodate axial (thrust) loads at high speeds but are not designed to support radial loads. They consist of bearing washers with raceway grooves that facilitate smooth ball movement.
These bearings are categorized based on the housing washer (outer ring seat) design into flat seat and aligning seat types. Spherical and aligning seat washers help compensate for mounting misalignments, ensuring optimal performance.
Features
- Designed for Axial Load Support : KG bearings are specifically engineered to handle axial (thrust) loads in one or both directions, depending on the type.
- High-Quality Steel Construction : Manufactured using high-grade steel for durability, strength, and resistance to wear and fatigue under axial stress.
- Precision-Ground Components : The balls and raceways are precision-ground to ensure smooth rotation, reduced friction, and improved efficiency.
- Two-Piece Construction: Typically made with a shaft washer, housing washer, and a ball cage assembly for easy installation and separation.
- Available in Single and Double Direction Types: Single-direction bearings support axial loads in one direction, while double-direction types can handle loads in both directions.
Applications
- Automotive Steering Systems: Supports axial loads in steering columns for smooth and precise movement.
- Machine Tool Spindles: Handles high axial forces during machining operations.
- Vertical Shafts and Pumps: Used to support axial loads in vertical-mounted rotating equipment.
- Marine Propulsion Systems: Manages thrust loads generated by propeller shafts.
- Elevators and Lifts: Ensures reliable axial load handling in hoisting mechanisms.
- Clutches and Gearboxes: Assists in axial load management during gear engagement and disengagement.
- Electric Motors (Vertical Mount): Supports vertical shafts where axial loads are significant.
Single-Direction Thrust Ball Bearings
KG single-direction thrust ball bearings consist of two bearing washers—a shaft washer and a housing washer—along with a single cage containing the balls. These bearings are designed to accommodate axial loads in one direction only.
Features
- Specialized Design: A cage contains the balls while the grooved aligning seat washer guides them.
- Dedicated Components: Washers attached to the shaft are called “shaft washers” and those attached to the housing are called “housing washers” (fixed rings).
- Support Axial Loads: Single-direction thrust ball bearings can take axial loads in one direction.
Application
- Printer peripheral equipment
- Ball screw support sections of precision positioning stages
- Automatic guided vehicles (AGVs)
- Radial drilling machines
- Fishing reels
FAQ's
What are radial loads and axial loads?
Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads
How do deep groove ball bearings (DGBBs) differ from single-row angular contact ball bearings?
While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.
What are the differences between open, sealed, and shielded deep groove ball bearings?
Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings.
NSK uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.
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