Sintered Bronze Self-Lubricating Oilless Bushings

Specifications

• Product Category: Precision Bearings & Bushings
• Geometries: Cylindrical (Sleeve), Flanged, Spherical (Self-Aligning)
• Size Range: Miniature ID Φ1.0 mm and above; fully customizable ID, OD, length, and spherical diameters
• Materials: Sintered Bronze (CuSn6Zn6Pb3, CuSn10), Iron-Bronze Alloy (Fe-Cu)
• Lubrication: Vacuum-impregnated with high/low-temperature synthetic, food-grade, or low-noise lubricating oils (18%–25% oil volume porosity)
• Applications: Cooling Fan Motors, Home Appliance Motors (Vacuum Cleaners/Washers/Blenders), Copier Paper-Feed Shafts, Automotive Actuators, Precision Instrument Pivots

Manufacturing Processes & Capabilities

• Controlled Porosity Compacting & Sintering: Utilizes precision-graded bronze powders compacted and sintered under controlled atmospheres to maintain 18%–25% interconnected porosity for optimal oil retention and fluid release.
• Micron-Precision Sizing & Form Tolerancing: Secondary sizing operations ensure tight tolerances for bore roundness, cylindrical straightness, and spherical profile sphericity, guaranteeing proper running clearances and vibration-free shaft rotation.

Features & Advantages

• Capillary Self-Lubricating & Maintenance-Free: Thermal expansion during rotation draws oil from micro-pores to form a hydrodynamic fluid film; when stopped, capillary action draws oil back into the pores for lifetime maintenance-free operation.
• Whisper-Quiet, Low Friction & Anti-Galling: Sintered bronze offers a low friction coefficient and natural vibration damping, eliminating metal whine and preventing shaft scoring under continuous high-speed rotation.
• Self-Aligning Spherical Capability: Spherical configurations provide automatic self-alignment, accommodating minor housing or shaft angular misalignments to prevent edge-loading and localized wear.