Super Thin Section Four-point Contact Ball Bearings

CHG Super Thin Section Four-point Contact Ball Bearings use a Type X raceway geometry and Conrad assembly. The internal geometry creates four potential contact points, enabling one bearing to support radial load, bidirectional thrust load and moment load, individually or in any combination.

The cross section remains nearly constant as bore diameter increases, helping designers enlarge hollow shafts or cable passages without a proportional increase in bearing envelope and mass. In many compact mechanisms, a single Type X bearing can replace a two-bearing arrangement, reducing axial space, mass and assembly complexity.

Design Features and Benefits

2.5 mm ultra-slim width reduces axial installation space and total mechanism weight.

Large bore-to-section ratio supports hollow-shaft, cable-routing and compact motion-control designs.

Four-point contact geometry supports radial, bidirectional thrust and moment loads in one compact bearing.

Stainless-steel rings and balls improve corrosion resistance in moisture and selected clean environments.

Low mass and low rotational inertia support sensitive positioning and intermittent motion.

Custom preload, clearance, precision, lubricant and hybrid ceramic-ball options are available after application review.

Multiple-load Capability

Type X is intended for applications involving multiple loads. Its four-point contact geometry can carry radial load, thrust load in either direction and moment load. When loads act simultaneously, internal load distribution and contact stress depend strongly on bearing fit, preload or clearance, and the rigidity of the shaft and housing.

• Robotic joints, compact rotary axes and end-effectors
• Satellite mechanisms, optical payloads and camera gimbals
• Inspection, measuring and precision positioning equipment
• Medical instruments and compact diagnostic mechanisms
• Semiconductor and clean motion-control modules
• Compact turntables and mechanisms subject to overturning moment

Application boundary

This series is intended primarily for precision positioning and light-to-medium duty mechanisms. Continuous high-speed, shock-load, vacuum, extreme-temperature or high-cycle applications require a dedicated engineering review.

Selection and Installation Guidelines

1. Define radial load, axial load magnitude and direction, moment, duty cycle and target life.
2. Calculate radial, bidirectional thrust and moment loads, including their combined action.
3. Control shaft and housing roundness, flatness and fit; thin rings are sensitive to mounting distortion.
4. Apply mounting force only to the ring being fitted; never transmit force through the balls.
5. Specify lubricant, operating temperature, cleanliness, corrosion exposure and relubrication strategy.
6. Confirm preload or operating clearance after fits, deformation and temperature effects are considered.

Customization and Engineering Support

• Dimensional customization and non-standard ring geometry
• Precision class, preload and internal clearance selection
• Stainless-steel or hybrid ceramic-ball configurations
• Special lubricants for low torque, clean, vacuum or temperature requirements
• Application calculations, drawings, inspection reports and material certificates

CHG Bearing combines manufacturing in Luoyang with application engineering and customized bearing development. Before quotation, our engineers can review the installation envelope, load spectrum, speed, accuracy, environment and expected service life.

Information Required for Quotation

• Bearing model or required d × D × B
• Radial/axial load, moment and load direction
• Speed, duty cycle and expected life
• Accuracy, runout, preload or operating clearance requirement
• Temperature, lubricant, cleanliness and corrosion conditions
• Quantity, destination country and required delivery date