Thomson Heim PB12-ADJ Pillow Block Bearing Unit

Description:

The Thomson Heim PB12-ADJ Pillow Block (AP-12, P12) is used in linear motion systems to provide precise, low-friction guidance for round shaft applications. Commonly installed in automated machinery, packaging equipment, CNC machines, material handling systems, and industrial automation equipment requiring smooth linear travel and accurate shaft support. Maintenance technicians, machine builders, and OEM system integrators use this pillow block bearing for machine repair, replacement, retrofits, and new linear motion assemblies. 

Applications:

The Thomson Heim PB12-ADJ is a precision steel ball bushing pillow block featuring an adjustable closed bearing design that allows preload adjustment to minimize running clearance and improve positioning accuracy. Its recirculating ball bearing construction provides exceptionally low friction, making it suitable for continuously supported linear shafting in manufacturing equipment, robotics, assembly systems, inspection machines, and other industrial motion control applications.

Technical Specifications:

• Brand: Thomson Heim (Thomson Industries)
• Part Number: PB12-ADJ (also referenced as PB12ADJ)
• Alternate References: AP-12, P12
• Product Type: Precision Steel Ball Bushing Pillow Block
• Bearing Style: Closed Adjustable Pillow Block
• Bore Diameter: 0.750 in. (3/4 in. / 19.05 mm)
• Shaft Compatibility: Thomson Class L Round Shafting
• Pillow Block Material: Steel
• Bearing Type: Recirculating Steel Ball Bushing
• Adjustable: Yes
• Self-Aligning: No
• Dynamic Load Capacity: 200 lbf (889.6 N)
• Maximum Operating Temperature: 85°C (185°F)
• Overall Dimensions: 2.75 in. W × 2.06 in. L × 2.13 in. H
• Mounting Hole Size: 0.220 in. (#10 / M10 compatible)
• Weight: Approximately 1.3 lb (0.59 kg)
• Typical Applications: Linear Motion Systems, CNC Equipment, Packaging Machinery, Factory Automation, Material Handling Equipment, and Precision Machine Tools.

Common Replacements:

• Thomson Heim PB12A Fixed Pillow Block Bearing
• Thomson Heim PB12ADJ-SS Stainless Steel Adjustable Pillow Block
• Thomson Super Smart Ball Bushing Pillow Block