Boston Gear 34552 Sleeve Bearing Oil Impregnated Bronze

Product Description

The BOSTON GEAR 34552 is an oil-impregnated bronze sleeve bearing designed for low-maintenance rotary and sliding shaft applications. It features a plain bore configuration with a 0.252-inch inside diameter, a 0.377-inch outside diameter, and an overall length of 0.75 inches. The bearing material is porous bronze pre-saturated with lubricating oil, which migrates to the shaft surface during operation to reduce friction without external lubrication. Licensed millwrights, maintenance mechanics, and industrial equipment technicians install this type of bearing in light-duty machinery, small motors, fans, and conveyor assemblies.

This bearing suits residential and light commercial equipment where low-speed, moderate-load shaft support is required. Typical applications include fractional horsepower motors, household appliances, HVAC blower assemblies, and small power transmission equipment. Its compact dimensions make it well suited for tight shaft bores where rolling-element bearings would not fit. The oil-impregnated bronze construction performs reliably in environments where periodic re-lubrication is impractical.

Key Features

• Oil-impregnated bronze material provides self-lubricating performance without external grease fittings
• Plain bore design accepts standard round shafts with minimal installation tooling
• Maximum pressure-velocity rating of 50,000 psi for moderate-duty load conditions
• Meets SAE 20 (ISO 68) and SAE 30 (ISO 100) lubricant standards
• Precision decimal dimensions: 0.252-inch ID and 0.377-inch OD for consistent fit

Compatibility

Designed as an OEM-style replacement sleeve bearing for fractional horsepower motors, small fans, and light-duty power transmission shafts requiring a 0.25-inch bore.

Installation Notes

Installation is typically performed by millwrights or maintenance technicians using a bearing press or suitable mandrel to press the bearing flush into the housing bore without cocking or side-loading. De-energize all equipment and lock out the power source before disassembly. Avoid hammering directly on the bearing face, as this can deform the bore and compromise the oil-impregnated matrix. No additional lubrication is required at initial installation under normal operating conditions.