Custom Special Sized 8mm Bore FR8ZZ Non-Standard Bearings for robotic actuators
| Item No | FR8ZZ / FR8-ZZ Non-Standard Ball Bearing |
| Size (d*D*B) | 8×28.575×7.95mm |
| Material | Chrome Steel Gcr15 |
| Lead Time | 40-45 Days |
| Weight | 0.028KG |
| MOQ | 5000 pcs |
⚙️Product Description:
The FR8ZZ (8×28.575×7.95mm) is a specialized non-standard deep groove ball bearing engineered for custom mechanical equipment requiring non-catalog hybrid dimensioning. Featuring an 8mm metric inner bore paired with an imperial-derived 28.575mm outer diameter (1-1/8 inch) and 7.95mm width (5/16 inch), it bridges the gap between metric shafts and imperial housing bores without custom machining adapters. Constructed from high-purity GCr15 chrome steel with dual metal dust shields (ZZ), it delivers smooth, high-speed performance and high radial load capacity in space-restricted machinery. Supplied under our proprietary RMO brand, we also offer global multi-brand OEM procurement for specialized machinery builders, conveyor manufacturers, and repair distributors.
⚙️Product Features:
- Unique Metric-Imperial Hybrid Sizing: Combines an 8mm metric shaft fit with a 28.575mm (1-1/8″) outer diameter, simplifying custom equipment retrofits.
- Deep Raceway Geometry: Precision-honed raceways support high radial loads alongside moderate axial forces in both directions under dynamic vibration.
- Dual Metal Shield Protection (ZZ): Pressed steel shields keep solid dust particles out while retaining long-life synthetic grease inside the raceway.
- High-Precision Chrome Steel Construction: Premium GCr15/52100 steel delivers long fatigue life, resistance to wear, and quiet running characteristics.
⚙️Product Application:
Engineered for custom dimensional retrofits, hybrid metric-imperial shafting, and reliable radial support, the FR8ZZ non-standard bearing is widely specified in:
- Specialized OEM machinery: custom robotic actuators, medical equipment positioning drives, and automated test fixtures.
- Conveyor & material handling: specialized gravity conveyor rollers, sorting line turn-tables, and custom packaging guides.
- Textile & printing equipment: custom spinning machine tensioners, printing press auxiliary rollers, and labeling machines.
- Power tools & lawn machinery: outdoor lawnmower deck spindles, custom power tool gearboxes, and garden tractors.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model No. | FR8ZZ / FR8-ZZ Non-Standard Ball Bearing |
| Bearing Type | Flanged Deep Groove Ball Bearing |
| Dimensions | 8×28.575×7.95mm (Inner d x Outer D x Total Width/Height H) |
| Sizing Classification | Non-Standard Metric-Imperial Hybrid |
| Seal type | Double-sided Metal Shields (ZZ Type) |
| Material | Chrome Steel (Gcr15) |
| Lubrication Type | |
| Precision Rating | |
| Package | |
| Lead Time | |
| MOQ | 5000 pcs |
| Shipping | |
| Service | Support Sample Testing |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
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