Boston Gear 34850 Sleeve Bearing 5/8 in Id Oil Bronze

Product Description

The BOSTON GEAR 34850 is an oil impregnated bronze sleeve bearing designed to support rotating shafts in light- to medium-duty mechanical assemblies. It features a plain bore with a 0.627 inch inside diameter, a 0.878 inch outside diameter, and an overall length of 5/8 inches. The sintered bronze construction holds lubricating oil within the material itself, releasing it continuously to the shaft surface during operation. This self-lubricating design reduces maintenance intervals and suits applications where re-greasing access is limited. Millwrights, maintenance technicians, and mechanical assembly professionals install this bearing type in motors, fans, conveyors, and general power transmission equipment.

This sleeve bearing is suited for residential and light commercial mechanical systems where a compact, low-maintenance radial bearing is required. Typical installations include fractional-horsepower electric motors, HVAC blower assemblies, small conveyors, and pump shaft supports. The part meets SAE 20 (ISO 68) and SAE 30 (ISO 100) lubrication standards, making it compatible with common industrial and HVAC-grade lubricating oils. Its small form factor fits confined bearing housings where rolling-element bearings are impractical or cost-prohibitive.

Key Features

• Oil impregnated bronze construction provides continuous self-lubrication without external grease fittings
• Plain bore design with 0.627 inch ID accommodates standard 5/8 inch shaft diameters
• Maximum pressure times velocity rating of 50,000 psi defines the load and speed operating limit
• Meets SAE 20 (ISO 68) and SAE 30 (ISO 100) oil standards for broad lubricant compatibility
• Compact 5/8 inch overall length fits tight axial envelopes in motors and blower housings

Compatibility

Designed as an OEM-style replacement sleeve bearing for fractional-horsepower motors, blower assemblies, and general power transmission shafting requiring a 5/8 inch bore plain bearing.

Installation Notes

Sleeve bearings of this type are typically pressed or driven into a housing bore by a qualified millwright or mechanical technician using a bearing press or appropriate mandrel - never drive directly on the bearing face with a hammer. De-energize and lock out all electrical power to the equipment before removing the shaft or existing bearing. Verify housing bore dimensions and shaft tolerance before installation to ensure proper interference fit. Consult the equipment manufacturer's service documentation for housing fit specifications.