Thomson Industries SPB8OPN Pillow Block Linear Bearing

Product Description

The THOMSON INDUSTRIES SPB8OPN is an open single pillow block linear bearing designed for linear motion applications requiring a compact, self-aligning mounting solution. With a 0.5 inch bore diameter and a single dynamic load capacity of 180 pounds (360 pounds twin), this ball bushing pillow block supports smooth, low-friction linear travel along a compatible shaft. The open bearing style allows for easy shaft installation and removal without full disassembly. The engineered-polymer retainer reduces weight and resists corrosion, making it suitable for a range of industrial and light-duty automation environments. Mechanical technicians and machine builders are the typical installers.

This pillow block linear bearing is used in linear motion systems where a shaft-mounted bearing block is required. Typical applications include light industrial automation, machine tool slides, actuator assemblies, and positioning systems. The self-aligning design compensates for minor shaft misalignment, reducing stress on both the bearing and the shaft. The open style is particularly useful in environments where debris clearance or shaft access is a priority. This bearing is sold individually and is appropriate for new builds as well as direct replacement of worn pillow block linear bearings in existing assemblies.

Key Features

• Open bearing style for easy shaft installation and access
• Self-aligning design compensates for minor shaft misalignment
• Single dynamic load capacity of 180 pounds; 360 pounds in twin configuration
• Engineered-polymer retainer for reduced weight and corrosion resistance
• Round bore with 0.5 inch inside diameter for standard shaft compatibility
• Compact block profile: 3.5 inches overall length, 2 inches wide, 1.13 inches tall

Compatibility

Designed as an OEM-style replacement or new-installation pillow block linear bearing for linear motion systems using a 0.5 inch diameter round shaft.

Installation Notes

Installation is performed by mechanical technicians or machine builders. Ensure the mating shaft is de-energized and all motion is arrested before replacing or installing this bearing. Align the pillow block mounting holes to a flat, rigid surface to avoid preloading the bearing housing. Do not overtighten mounting fasteners, as this may distort the bearing block and affect linear travel.