Thomson A81420 Precision Ball Bushing Linear Bearing

Description:

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

Applications:

The Thomson A81420 Precision Ball Bushing Linear Bearing is widely used in CNC machining centers, pick-and-place systems, packaging and labeling machines, conveyor positioning systems, inspection equipment, printing machinery, medical devices, semiconductor manufacturing equipment, and custom industrial automation systems requiring precise, low-friction linear guidance and long service life.

Technical Specifications:

• Manufacturer: Thomson
• Part Number: A81420
• Product Type: Precision Ball Bushing Linear Bearing
• Bearing Style: Closed
• Material: Precision Hardened 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 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
• Mounting Type: Press-Fit Housing
• Weight: 0.08 lb (0.036 kg)
• Application: Precision Linear Motion and Industrial Automation Systems

Common Replacements:

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