Thomson A81420 Ball Bushing For Anti-Friction Linear Motion

Description:

The Thomson A81420 Precision Ball Bushing Bearing is used in anti-friction linear motion systems to provide smooth, accurate, and low-drag linear travel on 1/2-inch Class S hardened shafting. Commonly installed in CNC machine tools, automated assembly equipment, packaging machinery, robotic positioning systems, semiconductor equipment, and material handling systems where precise linear movement is essential. Maintenance teams, OEM machine builders, and system integrators use this linear bearing for machine repairs, bearing replacement, linear motion retrofits, and new industrial automation installations.

Applications:

The Thomson A81420 Ball Bushing Bearing is widely used in precision automation equipment, CNC machining centers, pick-and-place systems, packaging and labeling machines, conveyor positioning systems, inspection equipment, medical devices, printing machinery, and custom OEM equipment requiring low-friction, anti-friction linear guidance with high positioning accuracy.

Technical Specifications:

• Manufacturer: Thomson
• Part Number: A81420
• Product Type: Precision Ball Bushing Linear Bearing
• Bearing Style: Closed
• Material: Precision Steel
• Nominal Shaft Diameter: 0.500 in (12.70 mm)
• Outside Diameter: 0.875 in (22.23 mm)
• Overall Length: 1.250 in (31.75 mm)
• Shaft Compatibility: Thomson Class S Precision Shafting
• Number of Ball Circuits: 4
• Self-Aligning: No
• Adjustable: No
• Corrosion Resistant: No (Standard Version)
• Dynamic Load Capacity: 85 lbf (378 N)
• Maximum Operating Temperature: 260°C (500°F)
• Coefficient of Friction: As Low As 0.001
• Design Feature: Steel sleeve with recirculating ball elements for rigid, low-drag anti-friction linear motion
• Mounting Type: Press-Fit Housing
• Weight: 0.08 lb (0.036 kg)

Common Replacements:

• Thomson A81420-NBALL
• Thomson A81420-SS
• Thomson A81420-LL