Description
Reviews
| 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 |
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.
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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