Overview
The Thomson SPB32OPN is a super ball bushing pillow block linear bearing with a 2-inch open design. This self-aligning, lightweight bearing has a low coefficient of friction, with wear-resistant engineered-polymer retainers and outer sleeves that reduce inertia and noise in high-speed applications. The open configuration allows the bearing to transverse continuously supported or intermittently supported shafts, making it a reliable choice for industrial automation, CNC equipment, and precision machinery.
Key Features
- Provides three times the load capacity or 27 times the travel life of conventional linear bearings
- Travel speeds up to 10 ft/s without reduction in load capacity
- Self-aligning capability up to 0.5 degrees, compensating for inaccuracies in base flatness or carriage machining
- Radially floating bearing plates for adjustable fit-up in precision applications
- Easily mounted and secured with four mounting bolts; complies with RoHS restrictions
- Constant coefficient of friction as low as 0.001
Technical Specifications
- Shaft Diameter (Bore): 2 inches
- Center Line to Base Height: 2-1/8 inches
- Length: 6 inches
- Width: 4-3/4 inches
- Height: 3.63 inches
- Dynamic Load Capacity: 3000 lb
- Maximum Speed: 3 m/s (approximately 10 ft/s)
- Operating Temperature: Up to 185°F
- Housing Material: Aluminum
- Bushing Type: Ball; Super Ball Bushing design
- Seals: Integral double-acting seals
- Weight: 2.72 kg (approximately 6 lbs)
- Mounting Configuration: 4-bolt pillow block
- Relubricatable: Yes
Typical Applications
The Thomson SPB32OPN excels in applications requiring smooth, precision linear motion with minimal friction:
- CNC machinery and automation equipment
- Conveyor and material handling systems
- Industrial press and punch equipment
- Packaging and labeling machinery
- Semiconductor and electronics manufacturing
- Textile and printing machinery
- Medical device assembly
Compatibility & Replacements
Compatible With
- Standard RoundRailâ„¢ shafts and linear rail systems
- Industrial machinery requiring 2-inch bore linear bearings
- Systems requiring self-aligning bearing plates for compensating misalignment
- Equipment operating at speeds up to 10 ft/s
- RoHS-compliant industrial control and automation systems
Replaces / Drop-In Replacement For
- SUPER-32-OPN-DD (Thomson internal bushing part number)
- Older friction-based pillow block bearings with equivalent 2-inch shaft specifications
Works With
- Thomson Linear RoundRailâ„¢ and other precision shafts
- Standard 4-bolt mounting interfaces in industrial machinery
- Continuous or intermittent shaft support applications
- Standard industrial lubrication and grease systems
