HK0306 High Speed Miniature Needle Roller Bushing 3×6.5x6mm for Micro Drives
| Item No : | HK0306 |
| Size (d*D*B) : | 3×6.5x6mm |
| Material : | Chrome Bearing Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.0007KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The HK0306 (3 x 6.5 x 6 mm) is an ultra-miniature drawn cup needle roller bearing engineered for sub-fractional drive assemblies and high-density electromechanical devices. Featuring a 3mm shaft diameter, 6.5mm outer shell diameter, and 6mm width, this open-end micro needle sleeve utilizes a deep-drawn thin-walled outer ring pressed directly into housing bores without requiring axial circlips. Its high-precision needle roller guided assembly maximizes radial load capacity within an exceptionally small envelope. Designed to run directly on hardened shafts, it delivers low friction, minimum inertia, and high rotational speeds. We maintain stock of our proprietary RMO brand while offering procurement channels for premier global brands, supplying medical equipment makers, micro-servo developers, precision instrument labs, and hobby RC gearboxes.
⚙️Product Features:
- Ultra-Compact Thin-Wall Shell: Thin-section cold-drawn outer cup provides maximum radial radial space-saving for micro-machinery designs.
- Direct Shaft Run Efficiency: Designed for hardened and ground shafts acting as internal raceways, eliminating extra inner ring mass and rotational inertia.
- Precision Roller Guidance: High-conformity needle rollers and precision cage ensure minimal skewing during high-RPM continuous micro-rotations.
- Interference Press Fit Assembly: Simplifies housing machining by requiring only a straight press-fit without needing axial locating shoulders or snap rings.
- Dual Sourcing Assurance: Available via cost-effective RMO factory stock as well as direct sourcing options for leading international needle bearing brands.
⚙️Product Application:
- Medical & Dental Instruments: Micro surgical drills, precision peristaltic pumps, and automated diagnostic liquid handling arms.
- Micro Servos & Actuators: High-torque RC steering servos, robotic finger joints, and miniature linear screw drive motors.
- Precision Instruments & Optics: Optical zoom lens positioning stages, micro encoders, and analytical laboratory metering units.
- Power Tools & Office Automation: Cordless micro screwdrivers, printer feed roller drive shafts, and small power transmission gearboxes.
⚙️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:
| Bearing Model | HK0306 |
| Bearing Type | Miniature Drawn Cup Needle Bearing |
| Metric Dimensions | 3×6.5x6mm (Inner d x Outer Dia D x Total Width/Height H) |
| Outer Ring Type | Deep-Drawn Thin-Walled Steel Shell |
| Cage / Needle Material | Steel Cage & Chromium Bearing Steel Rollers |
| Limiting Speed | Approx. 35,000 – 40,000 RPM |
| Mounting Fit | Press Fit in H7 Housing Bore / Shaft Hardness 58-64 HRC |
| Target Machinery | Medical Servos, Optical Instruments, RC Servos, Micro Drives |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
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