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

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.

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.

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.

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.

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.

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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