Oil Impregnated Sintered Iron Bearings

Product Overview 

Oil Impregnated Sintered Iron Bearings are sliding bearings manufactured from iron powder through high-pressure compaction, high-temperature sintering, and vacuum oil impregnation.
They feature a porous structure capable of storing lubricating oil, offering self-lubrication, cost-effectiveness, and wide application adaptability.

Common Synonyms 

• Oil Impregnated Sintered Iron Bearings

• Sintered Iron Bearings

• Iron Sintered Bushings

• Powder Metallurgy Bushings

• Oilite Bearings 

  Iron-based Powder Metallurgy

Features & Advantages 

• Cost Advantage 

  • High production efficiency, reduced machining time

  • Material utilization rate over 95%

  • Significant savings in non-ferrous metals → lower cost

• Self-Lubrication 

  • Uniform micro-pores store oil (18–20% mineral oil by volume)

  • Long-term operation without additional lubrication

  • Suitable for conditions where relubrication is difficult or oil contamination is not allowed

• Vibration Damping & Noise Reduction 

  • Effectively absorbs vibrations

  • Operates with low noise

  • Improves equipment stability and comfort

• Durability 

  • Comparable wear resistance to copper-based powder metallurgy bushings under light loads

  • Prevents shaft seizure with continuous oil supply

Applications 

• Industrial & Household Equipment 

  • Fractional horsepower motors (FHP motors)

  • Domestic appliances (micromotors, fans, mixers)

  • Noise reduction in small household devices

• Power Tools 

  • Provides lubrication and wear resistance for sliding parts

• Textile Machinery 

  • Suitable for dusty environments

  • Ensures stable operation of sliding components

• Automotive Industry 

  • Electric motors, shock absorbers, and guide bushings

  • Withstands high temperature and impact

• Other Applications 

  • Guide positioning bushings in static environments

  • General engineering requiring maintenance-free operation

Technical Data 

• Material : Porous Sintered Iron, Oil Impregnated

• Lubricant : Mineral Oil (18–20%)

• Temperature Range : -80℃ to +160℃

• Max. Load Pressure : 45 N/mm²

• Friction Coefficient  μ: 0.15 – 0.20

• Tolerance Standard : ISO 2795:1991

Availability 

• Straight Cylindrical Bushings 

• Flanged Bushings 

• Customized Designs