Overview
The Thomson SPB16OPN Super Pillow Block is a self-aligning linear ball bushing bearing pillow block engineered for high-performance industrial motion applications. This open-type unit accommodates 1.0-inch diameter shafts and provides continuous shaft support with minimal friction and maintenance overhead. The Super Ball Bushing bearing has been the industry standard for over twenty years, delivering three times the load capacity and 27 times the travel life compared to conventional linear bearings.
Key Features
- Self-Aligning Capability: Compensates for misalignments up to 0.5 degrees, reducing bearing stress and extending service life even with imperfect base flatness or carriage machining.
- High Load Capacity: Dynamic load rating of 780–1050 lbf (depending on configuration), with radially floating bearing plates for adjustable diametrical fit-up.
- Low Friction Operation: Coefficient of friction as low as 0.001, enabling smaller, less expensive drive motors and reducing power consumption.
- Wear-Resistant Design: Engineered-polymer retainers and outer sleeves reduce inertia and operating noise in high-speed applications.
- High-Speed Rated: Supports travel speeds up to 10 ft/s without loss of load capacity, ideal for packaging, machine tools, and automation systems.
- Integral Double-Acting Seals: Keeps contaminants out and retains lubrication, maximizing performance and service life.
Technical Specifications
- Shaft Diameter: 1.0 inch
- Overall Length: 3.250 inches
- Overall Width: 2.630 inches
- Overall Height: 2.000 inches
- Center Line to Base Height: 1.187 inches
- Dynamic Load Capacity: 780–1050 lbf
- Maximum Operating Temperature: +185 °F
- Bearing Material: Steel bearing balls with aluminum housing
- Housing Type: 4-bolt pillow block, aluminum
- Bushing Type: Ball bushing, single bearing
- Enclosure: Open with integral double-acting seals
- Self-Alignment: Yes, up to 0.5 degrees
- Adjustable: Non-adjustable open configuration
- Relubricatable: Yes
- Series: Super SPB (SPB16OPN)
Typical Applications
The Thomson SPB16OPN is ideal for demanding linear motion systems in:
- Machine tools and CNC equipment
- Packaging and filling machinery
- Automotive assembly lines
- Semiconductor manufacturing equipment
- Medical device automation
- Food processing equipment
Its combination of high load capacity, self-aligning capability, and low-friction operation makes it a reliable choice for continuous-motion applications requiring precision and extended service intervals.
Compatibility & Replacements
Compatible With
- 1.0-inch diameter round shafts (Class L toleranced)
- 4-bolt pillow block mounting patterns (standard industrial footprint)
- Continuously supported, horizontally or vertically mounted shaft systems
- Industrial automation frameworks using standard linear rail components
- Custom motion-control assemblies with RoundRail™ shaft technology
Replaces / Drop-In Replacement For
- Plain bearing pillow blocks and v-way blocks (with performance upgrade to low-friction operation)
- Standard single-bearing ball bushing blocks requiring higher load or extended travel life
- Verify exact replacement compatibility with system design specifications before ordering
Works With
- Thomson RoundRail™ linear shafting systems
- Thomson linear motion control assemblies
- Standard industrial 4-bolt pillow block mounting hardware (No. 10 bolts)
- Lubrication systems compatible with standard ball bearing greases
- OEM machinery and motion-control equipment using 1-inch continuous-support shafts
