SKF · rolling bearings
SKF RNA 6909
Needle roller bearings — manufacturer technical reference and quotation support in Saudi Arabia.
لطلب عرض سعر في السعودية، أرسل رقم القطعة أو المقاس والكمية والمدينة. يُرجى تأكيد التوافق والتوفر والسعر مع فريقنا.
| Bore diameter of needle roller complement | 52 mm |
|---|---|
| Outside diameter | 68 mm |
| Width | 40 mm |
| Basic dynamic load rating | 81.5 kN |
| Basic static load rating | 137 kN |
| Reference speed | 7500 r/min |
| Limiting speed | 8500 r/min |
| SKF performance class | SKF Explorer |
| Bearing part | Bearing without inner ring |
| Number of rows | 2 |
| Outer ring type | Machined (solid) |
| Aligning feature | Without |
| Cage | Sheet steel |
| Number of flanges, outer ring | 3 |
| Tolerance class | Normal |
| Material, bearing | Bearing steel |
| Coating | Without |
| Sealing | Without |
| Lubricant | None |
| Relubrication feature | With |
| Indicative carbon footprint for new product | 1.3 kg CO_2e |
| Product net weight | 0.338 kg |
| eClass code | 23-05-09-03 |
| UNSPSC code | 31171512 |
| Dimensions · Diameter under rollers · (F_w) | 52 mm |
| Dimensions · Outside diameter · (D) | 68 mm |
| Dimensions · Width · (C) | 40 mm |
| Dimensions · Chamfer dimension outer ring · (r_1,2) · min. | 0.6 mm |
| Abutment dimensions · Diameter of housing abutment · (D_a) · max. | 64 mm |
| Abutment dimensions · Fillet radius · (r_a) · max. | 0.6 mm |
| Calculation data · SKF performance class | SKF Explorer |
| Calculation data · Basic dynamic load rating · (C) | 81.5 kN |
| Calculation data · Basic static load rating · (C_0) | 137 kN |
| Calculation data · Fatigue load limit · (P_u) | 17.3 kN |
| Calculation data · Reference speed | 7500 r/min |
| Calculation data · Limiting speed | 8500 r/min |
| Associated seals · Radial shaft seal | 52x68x8 HMS5 RG |
Family specifications and selection conditions
| Product description | Double row needle roller bearings without an inner ring consist of an outer ring with two needle roller and cage assemblies. They are an excellent choice for compact bearing arrangements in applications where hardened and ground raceways can be provided on the shaft. The outer ring includes flanges to guide the roller and cage assemblies and has features to facilitate relubrication. The roller and cage assemblies and the outer ring form a non-separable unit. |
|---|---|
| Manufacturer features | High radial load carrying capacity • High stiffness • Low cross-sectional height • Accommodate axial displacement in both directions • Enable a larger shaft diameter and a more rigid bearing arrangement |
Manufacturer references
Follow the complete manufacturer documentation for application restrictions, materials, tolerances and installation requirements. Limits may not apply simultaneously. We do not publish inferred stock, pricing or ratings.