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 1M units/year production capacity & strict QA |
| BDL-branded, made in China (RoHS compliant) | Cost-optimized alternative to SKF NK/NKL series — identical fit, form, function; full interchangeability |
| 3–7 day lead time + OEM/ODM support | Faster delivery than premium brands — plus custom engraving, packaging, and spec tuning |
FAQ: Are RNAV4903–4907 interchangeable with SKF NK49/22, NK49/28? Yes — same dimensions, load ratings, and mounting specs. Do they require shaft/housing hardening? Yes — shaft hardness ≥58 HRC recommended. What’s the max speed? Up to 6,000 rpm (grease-lubed, light load). Can they handle axial loads? No — strictly radial only. Is cage material standard? Yes — high-strength polyamide (PA66) or brass upon request.
