Description
Reviews
| Brand | - |
| Category | New Fashion Jewelry / Chains |
| Origin | - |
| Material | PTFE Composite with Bronze Backing |
| Inner Diameter | 24 mm |
| Outer Diameter | 27 mm |
| Length | 30 mm |
| Lubrication Type | Self-Lubricating (Oil-Impregnated) |
| Max Load Capacity | 140 N/mm² Static |
| Operating Temperature | -40°C to +110°C |
| Friction Coefficient | 0.03 - 0.15 (Dynamic) |
| Application | Chain Guides, Pivot Points, Linkage Systems |
| Finish | Smooth PTFE Running Surface |
Anonymous
Mar 29, 2026
Rating: 5/5
Standard industrial grade quality
Exactly what was described. The PTFE layer is consistent, and the bronze backing provides good structural integrity. No issues during installation or operation so far.
Anonymous
Mar 22, 2026
Rating: 4/5
Good quality, slightly tight tolerance
The material quality seems excellent and very durable. The inner diameter was just a hair tight for our 24mm shaft, requiring some light reaming, but once installed, performance is great.
Anonymous
Mar 12, 2026
Rating: 5/5
Reliable and cost-effective
Bought a batch for maintenance stock. They meet all the specified dimensions perfectly. Great value for money compared to buying individual units from local suppliers.
Anonymous
Mar 07, 2026
Rating: 4/5
Works well in wet conditions
Using these in a washdown area where our chain drives operate. They handle the moisture well without rusting or seizing up. Would give 5 stars if shipping was faster.
Anonymous
Mar 05, 2026
Rating: 5/5
Perfect fit for our conveyor chain guide
These bearings slid right into the housing with minimal press fit required. We use them in a dusty environment for our chain drive system, and they have been running smoothly for three months without any additional lubrication.
Anonymous
Mar 01, 2026
Rating: 5/5
Excellent for high-cycle applications
We replaced standard bronze bushings with these SF1 composites in our packaging machine chains. The noise reduction is significant, and we no longer have to stop production for greasing.
Q: What is the recommended shaft tolerance for a 24mm ID?
A: For optimal performance, we recommend a shaft tolerance of e7 or f7 to ensure proper clearance for the self-lubricating layer to function correctly.
Q: Is the 30mm length exact or is there a tolerance?
A: There is a standard manufacturing tolerance of ±0.1mm on the length. If you require tighter tolerances, please contact us for custom machining options.
Q: Do I need to grease these before installation?
A: No, these are self-lubricating bearings. Adding external grease can actually attract dust and debris, potentially reducing their lifespan in dirty environments.
Q: Can these bearings be used in submerged water applications?
A: While they are water-resistant and suitable for wet environments, continuous submersion is not recommended as it may affect the long-term retention of the impregnated lubricant.
Q: Are these compatible with stainless steel shafts?
A: Yes, SF1 composite bearings work excellently with stainless steel shafts, providing low friction and preventing galling even under oscillating motion.
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