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Home / Mining Equipment / sf-2 50*55*60 Oil-Impregnated Bearing Wear-Resistant Sleeve Composite Sleeve Bronze Sleeve Composite Bushing Shaft Sleeve

Attributes

Brand -
Category Machinery & Equipment / Mining Equipment
Origin -
Model Number SF-2
Inner Diameter 50 mm
Outer Diameter 55 mm
Length 60 mm
Material Composition Bronze Powder with PTFE and Lead
Lubrication Type Self-Lubricating (Oil-Impregnated)
Max Load Capacity 250 N/mm² (Static)
Operating Temperature -40°C to +110°C
Friction Coefficient 0.03 - 0.08 (Dynamic)
Application Industry Mining, Construction, Heavy Machinery

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 4/5

Durable but shipping took a while

The quality of the bronze composite sleeve is excellent. It handles high loads without issue. Only giving 4 stars because the delivery to our remote site took longer than expected, but the product itself is top-notch.

A

Anonymous

Mar 26, 2026

Rating: 5/5

Solved our overheating issue

Previous bushings were generating too much heat under load. Switching to these SF-2 composite sleeves reduced friction and temperature significantly. Our machinery runs smoother now.

A

Anonymous

Mar 23, 2026

Rating: 4/5

Good value for money

Solid construction and good price point compared to local suppliers. They handle the vibration and load of our crushing equipment well. Would buy again.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Reliable supplier for industrial parts

Consistent quality across multiple orders. These shaft sleeves perform exactly as described in the technical specs. The oil-impregnated matrix works well even when external lubrication is difficult to apply.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Excellent wear resistance

We replaced standard brass bushings with these SF-2 composites in our conveyor system. After three months of continuous operation in dusty conditions, there is virtually no visible wear. Great investment.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect fit for our excavator maintenance

Ordered these SF-2 bushings for a routine overhaul on our mining excavators. The dimensions were exact, and the self-lubricating feature is saving us significant downtime. Highly recommended for heavy-duty applications.

5 FAQ

Q: Is additional greasing required during the break-in period?

A: Generally, no. The SF-2 is self-lubricating due to the oil-impregnated porous bronze structure. However, in extremely high-load startup scenarios, a thin film of compatible grease can help facilitate the initial run-in.

Q: What is the lead time for bulk orders over 500 units?

A: For orders exceeding 500 units, the typical production and shipping time is 10-14 business days. Please contact our sales department for a customized quote and expedited shipping options.

Q: Can these be pressed into a steel housing without damage?

A: Yes, the SF-2 sleeves are designed to be press-fitted into steel housings. We recommend using a slight interference fit (H7/p6) and ensuring the housing bore is clean and deburred to prevent damage during installation.

Q: Do you provide certification documents for material composition?

A: Absolutely. Every batch comes with a Material Test Report (MTR) verifying the bronze, PTFE, and lead content. You can request these documents via email after placing your order.

Q: Are these bushings suitable for underwater mining applications?

A: While the SF-2 material has good corrosion resistance, it is primarily designed for dry or occasionally lubricated environments. For constant submersion, we recommend consulting our engineering team for a specific marine-grade alternative.

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