Attributes

Brand	-
Category	Packaging / Packaging Tape
Origin	-
Material	Bronze/PTFE Composite
Inner Diameter	40 mm
Outer Diameter	50 mm
Length	Customizable
Lubrication Type	Self-Lubricating (Oil-Impregnated)
Max Load Capacity	High Static/Dynamic Load
Operating Temperature	-40°C to +110°C
Friction Coefficient	Low (0.03 - 0.15)
Application	Automotive, Machinery, Hydraulic Equipment
Finish	Precision Machined Surface

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect fit for our hydraulic press

These SF1-4050 bearings replaced our old metal sleeves perfectly. The self-lubricating feature has significantly reduced our maintenance schedule. Highly recommended for heavy-duty applications.

Anonymous

Mar 28, 2026

Rating: 4/5

Solid performance

Does what it says on the tin. The dimensions were accurate to the spec sheet. Installation was straightforward. Would buy again for future projects.

Anonymous

Mar 19, 2026

Rating: 4/5

Good quality, fast shipping

The bronze composite material feels very durable. We installed them in a conveyor system and they are running smoothly with no noise. Took off one star because the lead time was slightly longer than expected.

Anonymous

Mar 18, 2026

Rating: 5/5

Cost-effective and durable

Compared to traditional ball bearings, these sleeve bearings offer a much better price point for our specific low-speed, high-load application. Very satisfied with the purchase.

Anonymous

Mar 18, 2026

Rating: 5/5

Great solution for oil-free requirements

Needed a bearing that wouldn't leak oil into our food processing line. These composite sleeves are the perfect solution. Clean, efficient, and reliable.

Anonymous

Mar 11, 2026

Rating: 5/5

Excellent wear resistance

We have been using these bushings in high-friction environments for three months now. There is virtually no wear visible yet. The oil-impregnated design works exactly as advertised.

5 FAQ

Q: What is the tolerance range for the inner diameter?

A: The standard tolerance for the inner diameter is H7/H8 depending on the specific batch. Please contact us if you require tighter precision tolerances for your project.

Q: Do I need to add extra grease during installation?

A: No, the SF1-4050 is self-lubricating due to the PTFE layer and oil impregnation. Adding external grease is generally unnecessary unless specified for extreme conditions.

Q: Can you cut these to a custom length?

A: Yes, we offer custom cutting services. Please specify your required length in the order notes or contact our sales team before purchasing for bulk custom orders.

Q: Is this product compatible with stainless steel shafts?

A: Yes, these composite bearings work excellently with hardened carbon steel and stainless steel shafts, providing low friction and preventing galling.

Q: Can these bearings be used in underwater applications?

A: While they are oil-impregnated, prolonged submersion may wash out the lubricant over time. They are best suited for dry or occasionally wet environments, not continuous underwater use.

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