Thomson TWN-12 Super Ball Bushing Linear Bearing Pillow Block ID 0.75

Description:

The Thomson TWN12 Super Ball Bushing Twin Pillow Block Bearing is used in precision linear motion systems to provide smooth, self-aligning linear travel on 0.750-inch (3/4-inch) Class L round shafts. Commonly installed in CNC machines, robotics, packaging equipment, automated assembly systems, material handling equipment, and industrial automation machinery, this closed-type twin pillow block features a lightweight aluminum housing, integral double-acting seals, and a Super Ball Bushing bearing for accurate, low-friction, and repeatable linear motion. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of precision linear guide systems.

Applications:

The Thomson TWN12 is designed for end-supported shaft applications requiring high load capacity, precise positioning, and stable linear guidance. Its twin pillow block configuration provides increased rigidity while the self-aligning bearing design compensates for minor shaft misalignment, making it suitable for CNC machinery, semiconductor equipment, packaging systems, pick-and-place machines, inspection equipment, material handling systems, and custom OEM linear motion assemblies.

Technical Specifications:

• Manufacturer: Thomson Industries
• Manufacturer Part Number (MPN): TWN12
• Product Type: Super Ball Bushing Twin Pillow Block Bearing
• Series: Super Ball Bushing®
• Bearing Style: Closed
• Pillow Block Type: Twin
• Bearing Configuration: Twin Linear Bearing
• Housing Material: Aluminum
• Bearing Material: Hardened Steel with Engineered Polymer Retainers
• Nominal Bore (ID): 0.750 in (19.05 mm)
• Compatible Shaft Class: Class L Round Shaft
• Overall Length (B): 4.500 in (114.30 mm)
• Overall Width (A): 2.750 in (69.85 mm)
• Body Width (A2): 1.880 in (47.75 mm)
• Overall Height (H1): 1.750 in (44.45 mm)
• Centerline Height (G): 0.940 in (23.88 mm)
• Mounting Hole Centers (E2): 3.500 in (88.90 mm)
• Mounting Hole Diameter (N): 0.190 in (4.83 mm) (#8)
• Lubrication Access: 1/4-28
• Dynamic Load Capacity: 1,200 lbf (5,338 N)
• Maximum Travel Speed: 10 ft/sec (3 m/s)
• Maximum Operating Temperature: 185°F (85°C)
• Weight: 1.20 lb (0.544 kg)
• Self-Aligning: Yes
• Adjustable: No
• Number of Ball Circuits: 6
• Seals: Integral Double-Acting Seals
• Roll Pack: No
• Food Grade Rated: No
• Corrosion Resistance: Standard (Not Corrosion Resistant)
• Features: Twin bearing construction, self-aligning bearing plates, lightweight aluminum housing, engineered polymer retainers, low-friction operation, lubrication access, high-speed capability, integral seals, and extended service life. 

Common Replacements:

• Thomson TWN12ADJ
• Thomson TWN12-NBALL
• Thomson TWN12-OR