Description
Key Specifications & Advantages of RNAV4903–RNAV4907 Needle Roller Bearings
| Description | Core Value |
|---|---|
| Ultra-compact design (e.g., 22×30×13 mm) | Maximizes space efficiency in tight assemblies — ideal for automotive transmissions, gearboxes, and compact industrial actuators |
| Radial load-only, high-load capacity needle rollers | Delivers 2–3× higher radial load rating vs. deep groove ball bearings of same footprint |
| Bearing steel (GCr15) with precision ground raceways | Ensures exceptional hardness (HRC 60–64), wear resistance, and fatigue life |
| No outer/inner ring design | Reduces weight & cost; enables direct mounting on hardened shafts/housings — saves assembly time |
| Closed-type sealed construction | Prevents contamination ingress and retains grease — extends service life without relubrication |
| P0–P2 precision grades & C0–C4 clearance options | Supports high-speed, low-vibration applications (e.g., CNC spindles, robotics joints) |
| Grease or oil lubrication compatible | Flexible maintenance: pre-lubricated for life or field-replenishable via grease nipple |
| ISO/ABEC-certified manufacturing (HS Code 8482102000) | Meets global OEM quality standards — backed by 100% dimensional & noise testing |
| BDL brand, made in China (1M pcs/month capacity) | SKF-equivalent performance at 30–40% lower TCO — validated by ISO 9001 & IATF 16949 audits |
| OEM/ODM support + carton/pallet packaging | Fast lead time (3–7 days); custom labeling, packaging, and engineering docs available |
FAQ: Are these interchangeable with SKF HK/NA series? Yes — identical dimensions, load ratings, and ABEC tolerances. Do they require shaft/housing hardening? Yes — minimum HRC 58 recommended. What’s the max operating speed? Up to 12,000 rpm (with oil & C3 clearance). Can they handle shock loads? Optimized for intermittent impact — use C4 clearance for heavy-duty cases.
