Custom 21.5mm Inner Bore 6004-2RS Ball Bearing for Special Shafts
| Item No : | 6004-2RS (Non-Standard) |
| Size (d*D*B) : | 21.5x42x12mm |
| Material : | Chrome steel Gcr15 |
| Lead Time : | 3-5 workdays |
| Weight : | 0.069KG |
| MOQ : | 100 pcs |
| Service : | Support sample testing |
⚙️Bearing Introduction:
The non-standard 6004-2RS deep groove ball bearing is a specialized solution designed for unique mechanical requirements. While standard 6004 bearings feature a 20mm bore, this custom version offers a 21.5mm inner diameter, maintaining the standard 42mm outer diameter and 12mm width. It is engineered with high-quality Chrome Steel and features double rubber seals (2RS) to ensure optimal protection against dust and moisture.
⚙️Core Features:
• Custom 21.5mm Bore: Specifically machined for 21.5mm shafts, eliminating the need for shaft grinding or sleeves.
• Superior 2RS Sealing: Dual-lip rubber seals retain high-performance grease while blocking contaminants.
• High-Grade Chrome Steel: Crafted from GCr15 steel for exceptional wear resistance and durability.
• Quiet & Smooth Operation: Optimized raceway geometry ensures low friction and high-speed stability.
⚙️Key Applications:
This non-standard 21.5mm bore bearing is widely used in:
• Aftermarket Motorcycle Hubs: Specialized for certain custom bike models and wheel assemblies.
• Custom Power Tools: Repair and OEM production of non-standard rotary equipment.
• Agricultural Machinery: Specialized shafts in harvesting and processing equipment.
• Automotive Alternators: Specific automotive electrical components requiring a 21.5mm fit.
⚙️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:
| Item No. | 6004-2RS (Non-Standard) |
| Branding | Famous brand/RMO/Neutral/OEM |
| Sealing | OPEN, ZZ (Metal Shield), 2RS (Rubber Seal) |
| Material | Stainless steel (420 440C 304 316) or chrome steel Gcr15, etc. |
| Lead Time | 3-5 days |
| Precision | p0 p6 p5 p4 |
| Clearance | C2 C0 C3 C4 |
| Lubrication | Pre-filled Grease |
| Shipping Port | Guangzhou, Ningbo, Shanghai |
| Payment | 100% T/T, or 30% T/T In Advance ,70% T/T After Finished Production |
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