Cross-brand designation analysis
COMPARE / VERIFY
Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Cross Reference centre · Interchange verification checklist · Understand suffix differences
You entered NNU4948-S-K-M-SP. This table explores the base group NNU4948; it does not preserve or approve every requested suffix. Search your complete marking first →
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions verified
“NNU4948” across 3 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | SKFNNU 4948 B/SPW33240 × 320 × 80 mm | FAGNNU4948-S-K-M-SP240 × 320 × 80 mm | KOYONNU4948240 × 320 × 80 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | KOYO |
| Designation | NNU 4948 B/SPW33 | NNU4948-S-K-M-SP | NNU4948 |
| Product family | Super-precision cylindrical roller bearings | — | Single-row / NNU / Cylindrical bore |
| Detailed type | Super-precision double row cylindrical roller bearing with lubrication feature | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NNU4948 | — |
| Bore diameterd | 240 mm | 240 mm | 240 mm |
| Outside diameterD | 320 mm | 320 mm | 320 mm |
| WidthB | 80 mm | 80 mm | 80 mm |
| Basic dynamic load ratingC | 528 kN | 530 kN | 736 kN |
| Basic static load ratingC0 | 1220 kN | 1210 kN | 1340 kN |
| Fatigue load limitPu | 118 kN | 138 kN | 155 kN |
| Limiting speednG | — | — | 1600 r/min |
| Mass≈m | 18.3 kg | 25.6 kg | 18 kg |
| Precision class | — | SP — Tolerance class SP | — |
| Internal clearance | C1 | C1 (Group 1) — Internal clearance smaller than C2 | — |
| Sealing | Without | — | — |
| Cage | Machined metal | M — Brass Cage | — |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — |
| Maximum operating temperatureTmax | — | 150 °C | — |
| Capabilities & suitability | |||
| Radial load capacity | — | Yes | — |
| Suitable for grease lubrication | — | Yes | — |
| Suitable for oil lubrication | — | Yes | — |
| Unsealed design | — | Yes | — |
| Largebearing | — | Yes | — |
| Classification | |||
| Official Category Path | — | — | Cylindrical roller bearings - Single-row - NNU - Cylindrical bore |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NNU / Cylindrical bore |
| Dimensions | |||
| Minimum chamfer dimensionr1 min | — | 2.1 mm | — |
| Minimum chamfer dimensionr1 min | — | 0.083 in | — |
| Raceway diameter inner ringF | — | 265 mm | — |
| Raceway diameter inner ringF | — | 10.433 in | — |
| Width of lubricating groovens | — | 12.2 mm | — |
| Width of lubricating groovens | — | 0.48 in | — |
| Diameter lubrication holeds | — | 6.3 mm | — |
| Diameter lubrication holeds | — | 0.248 in | — |
| Axial displacements | — | 4.3 mm | — |
| Axial displacements | — | 0.169 in | — |
| Engineering — Abutment dimensions | |||
| Abutment diameter shaftd a | min. 251 mm | — | — |
| Abutment diameter shaft (NNU design)d a | max. 262 mm | — | — |
| Abutment diameter shaft (NNU design; not for tapered bore)d b | min. 269 mm | — | — |
| Abutment diameter housingD a | max. 309 mm | — | — |
| Fillet radiusr a | max. 2 mm | — | — |
| Oil nozzle position (not for variants with TNHA cage)d n | 267 mm | — | — |
| Engineering — Calculation data | |||
| Attainable speed for grease lubrication | 2200.0 r/min | — | — |
| Attainable speed for oil-air lubrication | 2600.0 r/min | — | — |
| Reference grease quantityG ref | 171 cm³ | — | — |
| Static radial stiffness (guideline value) | 6340 N/µm | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter outer ring (NNU design)D 1 | 292.2 mm | — | — |
| Raceway diameter inner ring (NNU design)F | 265 mm | — | — |
| Width annular lubrication groove at outer ringb | 11.1 mm | — | — |
| Diameter lubrication hole (outer ring)K | 3 mm | — | — |
| Chamfer dimension outer ringr 1,2 | min. 2.1 mm | — | — |
| Chamfer dimension inner ring (bearing with tapered bore)r 3,4 | min. 2.1 mm | — | — |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all)s | max. 3.7 mm | — | — |
| Engineering — Engineering specifications | |||
| Bore type | Cylindrical | — | — |
| Logistics | |||
| Product net weight | 18.3 kg | — | — |
| eClass code | 23-05-09-01 | — | — |
| UNSPSC code | 31171505 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 530,000 N | — |
| Basic dynamic load rating, radialCr | — | 119,154.676 lbf | — |
| Basic static load rating, radialC0r | — | 1,210,000 N | — |
| Basic static load rating, radialC0r | — | 272,032.374 lbf | — |
| Fatigue load limit, radialCur | — | 138,000 N | — |
| Fatigue load limit, radialCur | — | 31,025.18 lbf | — |
| Limiting speed for grease lubricationnG Grease | — | 2,400 1/min | — |
| Limiting speed for oil lubricationnG Oil | — | 2,800 1/min | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 374672 | — |
| Official Class Key | — | — | 040-020-020 |
| Base Type | — | NNU4948 | — |
| Gpsd Group | — | F07 | — |
| Product Line Id | — | 39 | — |
| SAP material number | — | 0192335740000 | — |
| Base product | — | 230509014C | — |
| Bearing X designation | — | NNU4948-S-K-M-SP | — |
| Mounting Manager ID | — | NNU4948-S-K-M-SP | — |
| Mounting dimensions | |||
| Diameter shaft shoulderda | — | 263 mm | — |
| Diameter shaft shoulderda | — | 10.354 in | — |
| Diameter shaft shoulder tolerance | — | h12 | — |
| Diameter of housing shoulderDa | — | 299 mm | — |
| Diameter of housing shoulderDa | — | 11.772 in | — |
| Diameter of housing shoulder tolerance | — | H12 | — |
| Maximum recess radiusra1 max | — | 2.1 mm | — |
| Maximum recess radiusra1 max | — | 0.083 in | — |
| Product characteristics | |||
| Tolerance classSP | — | Tolerance class SP | — |
| Bore typeK | — | Tapered, taper 1:12 | — |
| Locating Feature , bearing outer ringS | — | Lubrication holes and lubrication groove in outer ring | — |
| Radial internal clearanceC1 (Group 1) | — | Internal clearance smaller than C2 | — |
| Number of rows2 | — | Double-row design | — |
| Product identity | |||
| Official product category | Super-precision cylindrical roller bearings | — | — |
| Official taxonomy path | /products/super-precision-bearings/cylindrical-roller-bearings | — | — |
| Structure group ID | BC2_010 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Construction | — | Super precision cylindrical roller bearings NNU49..-S-K-M-SP, non-locating bearing, double row, with tapered bore, taper 1:12, separable, with cage | — |
| Short Description | — | Cylindrical roller bearing | — |
| Properties | |||
| Bearing part | Complete bearing | — | — |
| Number of rows | 2 | — | — |
| Design | NNU | — | — |
| Number of flanges, outer ring | 3 | — | — |
| Number of flanges, inner ring | 0 | — | — |
| Loose flange | None | — | — |
| Radial internal clearance | C1 | — | — |
| Tolerance class | Class SP (SP) | — | — |
| Material, bearing | Bearing steel | — | — |
| Coating | Without | — | — |
| Relubrication feature | Annular groove and lubrication holes | — | — |
| Indicative carbon footprint for new product | 67.9 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 320 mm |
| B | — | — | 80 mm |
| Bore Diameter (D) | — | 240 mm | — |
| R(Min.) | — | — | 2.1 mm |
| Outside Diamater (D) | — | 320 mm | — |
| Fw | — | — | 263 mm |
| Total Width (B) | — | 80 mm | — |
| Ew | — | — | - mm |
| Basic Dynamic Load Rating, Radial (Cr) | — | 530,000 N | — |
| Basic Load Ratings : Cr | — | — | 736 kN |
| Basic Static Load Rating, Radial (C0R) | — | 1,210,000 N | — |
| Basic Load Ratings : C0R | — | — | 1340 kN |
| Diameter Lubrication Hole (Ds) | — | 6.3 mm | — |
| Fatigue Load Limit : Cu | — | — | 155 kN |
| Raceway Diameter Inner Ring (F) | — | 265 mm | — |
| Limiting Speeds(Grease Lub.) | — | — | 1600 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Limiting Speeds(Oil Lub.) | — | — | 1900 min-1 |
| Limiting Speed For Grease Lubrication (Ng Grea) | — | 2,400 1/min | — |
| Da(Min.) | — | — | - mm |
| Minimum Diameter Shaft Shoulder (Da) | — | 263 mm | — |
| Da(Max.) | — | — | 309 mm |
| Limiting Speed (Ng Oil) | — | 2,800 1/min | — |
| Db(Min.) | — | — | 269 mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — |
| Maximum Diameter Of Housing Shoulder (Da) | — | 299 mm | — |
| Ra(Max.) | — | — | 2 mm |
| Minimum Chamfer Dimension (R1 Min) | — | 2.1 mm | — |
| Mass(Refer.) | — | — | 18.0 kg |
| Width Of Lubricating Groove (Ns) | — | 12.2 mm | — |
| Axial Displacement (S) | — | 4.3 mm | — |
| Maximum Recess Radius (Ra1 Max) | — | 2.1 mm | — |
| Fatigue Load Limit, Radial (Cur) | — | 138,000 N | — |
| Temperature range | |||
| Operating temperature min.Tmin | — | -30 °C | — |
| Operating temperature min.Tmin | — | -22 °F | — |
| Operating temperature max.Tmax | — | 150 °C | — |
| Operating temperature max.Tmax | — | 302 °F | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.