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| Parameter | SKFNJ 2248 MA240 × 440 × 120 mm | TIMKENNJ2248EMA240 × 440 × 120 mm | KOYONJ2248240 × 440 × 120 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | TIMKEN | KOYO |
| Designation | NJ 2248 MA | NJ2248EMA | NJ2248 |
| Product family | Cylindrical roller bearings | Cylindrical 1-Row | Single-row / NJ |
| Detailed type | Single row cylindrical roller bearing, nj design | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | EX27837 | — |
| Bore diameterd | 240 mm | 240 mm | 240 mm |
| Outside diameterD | 440 mm | 440 mm | 440 mm |
| WidthB | 120 mm | 120 mm | 120 mm |
| Basic dynamic load ratingC | 1450 kN | 2040 kN | 1790 kN |
| Basic static load ratingC0 | 2360 kN | 2680 kN | 2320 kN |
| Fatigue load limitPu | 224 kN | — | 246 kN |
| Reference speednref | 1500 r/min | — | — |
| Limiting speednG | 2200 r/min | — | 1100 r/min |
| Mass≈m | 86 kg | 83 kg | 84.5 kg |
| Internal clearance | CN | — | — |
| Sealing | Without | Open | — |
| Cage | Machined brass | Window Brass cage | — |
| Lubricant | None | — | — |
| Calculation Factors | |||
| K Factor | — | 0.00 | — |
| Y1 Factor | — | 0.00 | — |
| Y2 Factor | — | 0.00 | — |
| Y0 Factor | — | 0.00 | — |
| E Factor | — | 0.00 | — |
| Cg Factor | — | 0.1746 | — |
| Classification | |||
| Official Category Path | — | — | Cylindrical roller bearings - Single-row - NJ |
| Official Classification 1 | — | — | Cylindrical roller bearings / Single-row / NJ |
| Engineering — Abutment dimensions | |||
| Diameter of spacer sleeved a | max. 284 mm | — | — |
| Diameter of shaft abutmentd b | min. 317 mm | — | — |
| Diameter of housing abutmentD a | max. 423 mm | — | — |
| Radius of filletr a | max. 3 mm | — | — |
| Engineering — Calculation data | |||
| Minimum load factork r | 0.2 | — | — |
| Limiting valuee | 0.3 | — | — |
| Calculation factorY | 0.4 | — | — |
| Engineering — Dimensions | |||
| Shoulder diameter of inner ringd 1 | ≈ 313 mm | — | — |
| Shoulder diameter of outer ringD 1 | ≈ 365 mm | — | — |
| Raceway diameter of inner ringF | 295 mm | — | — |
| Chamfer dimensionr 1,2 | min. 4 mm | — | — |
| Permissible axial displacements | max. 4.3 mm | — | — |
| Logistics | |||
| Product net weight | 86.0 kg | — | — |
| eClass code | 23-05-09-01 | — | — |
| UNSPSC code | 31171505 | — | — |
| Manufacturer Identity | |||
| Material Number | — | 000000000190023851 | — |
| Official Class Key | — | — | 040-010-000 |
| World Assembly Part Number | — | NJ2248EMA | — |
| Inner Ring Part Number | — | 240ARJE22 | — |
| Outer Ring Part Number | — | 240ERUE22 | — |
| Drawing Number | — | M941406 | — |
| Upc | — | 0087796313590 | — |
| Official Source System | — | CORE BP - DS DF | — |
| Official Last Run | — | 2026-08-23T20:02:48.51 | — |
| Product identity | |||
| Official product category | Cylindrical roller bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/cylindrical-roller-bearings/single-row-cylindrical-roller-bearings | — | — |
| Structure group ID | BC1_001_101 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | Yes | — | — |
| Product Identity | |||
| Type Description | — | Cylindrical 1-Row | — |
| Construction | — | Single Row Cylindrical Roller Bearing | Imperial Series | 9.4488 in Bore | 17.3228 in OD | 4.7244 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | C0 Clearance | — |
| Number Of Rows | 1 | 1 | — |
| Tapered Bore | — | N | — |
| Properties | |||
| Bearing part | Complete bearing | — | — |
| Axial displacement capability | In one direction | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Bore type | Cylindrical | — | — |
| Number of flanges, outer ring | 2 | — | — |
| Number of flanges, inner ring | 1 | — | — |
| Loose flange | None | — | — |
| Radial internal clearance | CN | — | — |
| Tolerance class | Normal | — | — |
| Coating | Without | — | — |
| Relubrication feature | Without | — | — |
| Candidate for remanufacturing | Yes | — | — |
| Indicative carbon footprint for new product | 318.0 kg CO 2 e | — | — |
| Indicative carbon footprint for remanufactured product | 106.0 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 440 mm |
| B | — | — | 120 mm |
| R(Min.) | — | — | 4 mm |
| R1(Min.) | — | — | 4 mm |
| Overall Width | — | 0.000 mm | — |
| Fw | — | — | 295 mm |
| Radial Rating | — | 2,040,000 N | — |
| Ew | — | — | - mm |
| Axial Rating | — | 0 N | — |
| Basic Load Ratings : Cr | — | — | 1790 kN |
| Dynamic Rating C1 | — | 2,040,000 N | — |
| Basic Load Ratings : C0R | — | — | 2320 kN |
| Dynamic Rating C90 | — | 0 N | — |
| Fatigue Load Limit : Cu | — | — | 246 kN |
| Dynamic Axial Rating Ca90 | — | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | — | 1100 min-1 |
| Dynamic Axial Rating Ca1 | — | 0 N | — |
| Limiting Speeds(Oil Lub.) | — | — | 1500 min-1 |
| Static Radial Rating C0 | — | 2,680,000 N | — |
| Sd1 | — | — | - mm |
| Extended Dynamic Rating Ce | — | 0 N | — |
| B1 | — | — | - mm |
| Static Axial Rating C0A | — | 0 N | — |
| B2 | — | — | - mm |
| Da(Min.) | — | — | - mm |
| Db(Min.) | — | — | - mm |
| Db(Max.) | — | — | - mm |
| Dc(Min.) | — | — | - mm |
| Dd(Min.) | — | — | - mm |
| Da(Max.) | — | — | 424 mm |
| Ra(Max.) | — | — | 3 mm |
| Rb(Max.) | — | — | 3 mm |
| Mass(Refer.) | — | — | 84.5 kg |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.