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| Parameter | SKFNU 238 ECM190 × 340 × 55 mm | FAGNU238-E-M1190 × 340 × 55 mm | TIMKENNU238EMA190 × 340 × 55 mm | NSKNU238EM190 × 340 × 55 mm | KOYONU238R190 × 340 × 55 mm |
|---|---|---|---|---|---|
| Comparable specifications | |||||
| Brand | SKF | FAG | TIMKEN | NSK | KOYO |
| Designation | NU 238 ECM | NU238-E-M1 | NU238EMA | NU238EM | NU238R |
| Product family | Cylindrical roller bearings | — | Cylindrical 1-Row | Cylindrical roller bearing | Single-row / NU |
| Detailed type | Single row cylindrical roller bearing, nu design | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings | Cylindrical roller bearings |
| Series | — | NU238 | EX27770 | — | — |
| Bore diameterd | 190 mm | 190 mm | 190 mm | 190 mm | 190 mm |
| Outside diameterD | 340 mm | 340 mm | 340 mm | 340 mm | 340 mm |
| WidthB | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm |
| Basic dynamic load ratingC | 800 kN | 680 kN | 777 kN | 855 kN | 869 kN |
| Basic static load ratingC0 | 965 kN | 930 kN | 960 kN | 955 kN | 954 kN |
| Fatigue load limitPu | 98 kN | 83 kN | — | — | 114 kN |
| Reference speednref | 2000 r/min | 1720 r/min | — | — | — |
| Limiting speednG | 2200 r/min | 3050 r/min | — | — | 1700 r/min |
| Mass≈m | 22.5 kg | 21.62 kg | 22.2 kg | — | 23.3 kg |
| Precision class | — | PN — Normal (ISO 492:2023) | — | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — | — |
| Sealing | Without | — | Open | — | — |
| Cage | Machined brass | M1 — Two Piece Brass Cage Roller Guided | Window Brass cage | Machined brass | — |
| Lubricant | None | — | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — | — |
| Maximum operating temperatureTmax | — | 150 °C | — | — | — |
| Boundary dimensions | |||||
| Bearing widthB | — | — | — | 55 mm | — |
| Minimum bearing chamferr min. | — | — | — | 4 mm | — |
| Minimum secondary bearing chamferr1 min. | — | — | — | 4 mm | — |
| Roller inscribed circle diameterFw | — | — | — | 230 mm | — |
| Calculation Factors | |||||
| K Factor | — | — | 0.00 | — | — |
| Y1 Factor | — | — | 0.00 | — | — |
| Y2 Factor | — | — | 0.00 | — | — |
| Y0 Factor | — | — | 0.00 | — | — |
| E Factor | — | — | 0.00 | — | — |
| Cg Factor | — | — | 0.1291 | — | — |
| Capabilities & suitability | |||||
| Radial load capacity | — | Yes | — | — | — |
| Suitable for grease lubrication | — | Yes | — | — | — |
| Suitable for oil lubrication | — | Yes | — | — | — |
| Unsealed design | — | Yes | — | — | — |
| Largebearing | — | Yes | — | — | — |
| Catalogue reference mass | |||||
| Approximate shared-row mass — not separately stated for each rib arrangement | — | — | — | 23 kg | — |
| Classification | |||||
| Official Category Path | — | — | — | — | Cylindrical roller bearings - Single-row - NU |
| Official Classification 1 | — | — | — | — | Cylindrical roller bearings / Single-row / NU |
| Construction | |||||
| Single-row construction type | — | — | — | NU | — |
| Rib arrangement | — | — | — | Two outer-ring ribs; ribless inner ring | — |
| Standard cage material | — | — | — | Machined brass | — |
| Standard cage marking | — | — | — | M | — |
| Other cage codes listed for this catalogue row | — | — | — | None listed in this row | — |
| Precision — designation omission rule | — | — | — | ISO Normal when no precision suffix is specified | — |
| Clearance identification — verify interchangeability | — | — | — | No clearance suffix shown. CN omission applies to interchangeable designs; do not infer a numerical clearance. | — |
| Optimized crowning note | — | — | — | Catalogue asterisk: optimized crowning may be available; not verified as fitted | — |
| Dimensions | |||||
| Minimum chamfer dimensionrmin | — | 4 mm | — | — | — |
| Minimum chamfer dimensionrmin | — | 0.157 in | — | — | — |
| Minimum chamfer dimensionr1 min | — | 4 mm | — | — | — |
| Minimum chamfer dimensionr1 min | — | 0.157 in | — | — | — |
| Axial displacements | — | 4.7 mm | — | — | — |
| Axial displacements | — | 0.185 in | — | — | — |
| Raceway diameter outer ringE | — | 306 mm | — | — | — |
| Raceway diameter outer ringE | — | 12.047 in | — | — | — |
| Raceway diameter inner ringF | — | 230 mm | — | — | — |
| Raceway diameter inner ringF | — | 9.055 in | — | — | — |
| Minimum rib diameter outer ringD1 min | — | 295 mm | — | — | — |
| Minimum rib diameter outer ringD1 min | — | 11.614 in | — | — | — |
| Engineering — Abutment dimensions | |||||
| Diameter of spacer sleeved a | max. 226 mm | — | — | — | — |
| Diameter of shaft abutmentd b | min. 233 mm | — | — | — | — |
| Diameter of housing abutmentD a | max. 321.9 mm | — | — | — | — |
| Radius of filletr a | max. 3 mm | — | — | — | — |
| Radius of filletr b | max. 3 mm | — | — | — | — |
| Engineering — Associated products | |||||
| Angle ring | HJ 238 EC | — | — | — | — |
| Engineering — Calculation data | |||||
| SKF performance class | SKF Explorer | — | — | — | — |
| Minimum load factork r | 0.15 | — | — | — | — |
| Limiting valuee | 0.2 | — | — | — | — |
| Calculation factorY | 0.6 | — | — | — | — |
| Engineering — Dimensions | |||||
| Shoulder diameter of outer ringD 1 | ≈ 293.6 mm | — | — | — | — |
| Raceway diameter of inner ringF | 230 mm | — | — | — | — |
| Chamfer dimensionr 1,2 | min. 4 mm | — | — | — | — |
| Chamfer dimensionr 3,4 | min. 4 mm | — | — | — | — |
| Permissible axial displacements | max. 3 mm | — | — | — | — |
| Load ratings — standard cage | |||||
| Basic dynamic radial load ratingCr | — | — | — | 855000 N | — |
| Basic static radial load ratingC0r | — | — | — | 955000 N | — |
| Logistics | |||||
| Product net weight | 22.5 kg | — | — | — | — |
| eClass code | 23-05-09-01 | — | — | — | — |
| UNSPSC code | 31171505 | — | — | — | — |
| Lubrication-qualified speed — standard cage | |||||
| Thermal speed rating — oil bath | — | — | — | 2000 r/min | — |
| Mechanical limiting speed — forced oil circulation | — | — | — | 3400 r/min | — |
| Limiting speed — grease | — | — | — | 1800 r/min | — |
| Limiting speed — oil bath | — | — | — | 2200 r/min | — |
| Main Dimensions & Performance Data | |||||
| Basic dynamic load rating, radialCr | — | 680,000 N | — | — | — |
| Basic dynamic load rating, radialCr | — | 152,877.698 lbf | — | — | — |
| Basic static load rating, radialC0r | — | 930,000 N | — | — | — |
| Basic static load rating, radialC0r | — | 209,082.734 lbf | — | — | — |
| Fatigue load limit, radialCur | — | 83,000 N | — | — | — |
| Fatigue load limit, radialCur | — | 18,660.072 lbf | — | — | — |
| Manufacturer Identity | |||||
| Schaeffler Product Code | — | 367811 | — | — | — |
| Material Number | — | — | 000000000100328914 | — | — |
| Official Class Key | — | — | — | — | 040-010-000 |
| Base Type | — | NU238 | — | — | — |
| World Assembly Part Number | — | — | NU238EMA | — | — |
| Old Designation | — | ["NU238E.M1","NU238E.M","NU238M"] | — | — | — |
| Inner Ring Part Number | — | — | 190ARUE02 | — | — |
| Gpsd Group | — | F01 | — | — | — |
| Outer Ring Part Number | — | — | 190ERUE02 | — | — |
| Product Line Id | — | 75 | — | — | — |
| Drawing Number | — | — | M104306 | — | — |
| X Life Marking | — | n.r. | — | — | — |
| Upc | — | — | 0087796302839 | — | — |
| Official Source System | — | — | CORE BP - DS DF | — | — |
| Official Last Run | — | — | 2026-08-23T20:02:46.143 | — | — |
| SAP material number | — | 0190048930000 | — | — | — |
| Base product | — | 2305090102 | — | — | — |
| Bearing X designation | — | NU238-E-M1 | — | — | — |
| Mounting Manager ID | — | NU238-E-M1 | — | — | — |
| Grease application ID | — | NU238-E-M1 | — | — | — |
| Mounting dimensions | |||||
| Minimum diameter shaft shoulderda min | — | 207 mm | — | — | — |
| Minimum diameter shaft shoulderda min | — | 8.15 in | — | — | — |
| Maximum diameter of shaft shoulderda max | — | 227 mm | — | — | — |
| Maximum diameter of shaft shoulderda max | — | 8.937 in | — | — | — |
| Minimum shaft shoulderdb min | — | 234 mm | — | — | — |
| Minimum shaft shoulderdb min | — | 9.213 in | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 323 mm | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 12.717 in | — | — | — |
| Maximum recess radiusra max | — | 3 mm | — | — | — |
| Maximum recess radiusra max | — | 0.118 in | — | — | — |
| Maximum recess radiusra1 max | — | 3 mm | — | — | — |
| Maximum recess radiusra1 max | — | 0.118 in | — | — | — |
| Mounting dimensions — shown arrangement | |||||
| Minimum shaft shoulder diameterdb min. | — | — | — | 206 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | — | 324 mm | — |
| Maximum adjusting-ring diameter (NU/NJ arrangement)db max. | — | — | — | 225 mm | — |
| Maximum adjacent fillet radiusra max. | — | — | — | 3 mm | — |
| Maximum secondary adjacent fillet radiusrb max. | — | — | — | 3 mm | — |
| Product characteristics | |||||
| DesignE | — | Increased Capacity Design | — | — | — |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance | — | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — | — |
| Number of rows1 | — | Single-row design | — | — | — |
| 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 | |||||
| Construction | — | Cylindrical roller bearing NU..-E-M1, with cage, single row, non-locating bearing, 2 ribs on outer ring, 0 ribs on inner ring (smooth), type NU, Running accuracy in P6 | Single Row Cylindrical Roller Bearing | Imperial Series | 7.4803 in Bore | 13.3858 in OD | 2.1654 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | C0 Clearance | — | — |
| Type Description | — | — | Cylindrical 1-Row | — | — |
| Short Description | — | Cylindrical roller bearing | — | — | — |
| Number Of Rows | 1 | — | 1 | — | — |
| Tapered Bore | — | — | N | — | — |
| Properties | |||||
| Bearing part | Complete bearing | — | — | — | — |
| Axial displacement capability | In both directions | — | — | — | — |
| Locating feature, bearing outer ring | Without | — | — | — | — |
| Bore type | Cylindrical | — | — | — | — |
| Number of flanges, outer ring | 2 | — | — | — | — |
| Number of flanges, inner ring | 0 | — | — | — | — |
| 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 | 83.2 kg CO 2 e | — | — | — | — |
| Indicative carbon footprint for remanufactured product | 27.7 kg CO 2 e | — | — | — | — |
| Technical Data | |||||
| d | — | — | — | — | 340 mm |
| B | — | — | — | — | 55 mm |
| R(Min.) | — | — | — | — | 4 mm |
| R1(Min.) | — | — | — | — | 4 mm |
| Bore Diameter (D) | — | 190 mm | — | — | — |
| Overall Width | — | — | 0.000 mm | — | — |
| Fw | — | — | — | — | 230 mm |
| Outside Diamater (D) | — | 340 mm | — | — | — |
| Radial Rating | — | — | 777,000 N | — | — |
| Ew | — | — | — | — | - mm |
| Total Width (B) | — | 55 mm | — | — | — |
| Axial Rating | — | — | 0 N | — | — |
| Basic Load Ratings : Cr | — | — | — | — | 869 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 680,000 N | — | — | — |
| Dynamic Rating C1 | — | — | 777,000 N | — | — |
| Basic Load Ratings : C0R | — | — | — | — | 954 kN |
| Basic Static Load Rating, Radial (C0R) | — | 930,000 N | — | — | — |
| Dynamic Rating C90 | — | — | 0 N | — | — |
| Fatigue Load Limit : Cu | — | — | — | — | 114 kN |
| Raceway Diameter Inner Ring (F) | — | 230 mm | — | — | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | — | 1700 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | — | 2000 min-1 |
| Minimum Diameter Shaft Shoulder (Da) | — | 207 mm | — | — | — |
| Static Radial Rating C0 | — | — | 960,000 N | — | — |
| Sd1 | — | — | — | — | - mm |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — | — |
| Extended Dynamic Rating Ce | — | — | 0 N | — | — |
| B1 | — | — | — | — | - mm |
| Limiting Speed (Limiting Spe) | — | 3,050 1/min | — | — | — |
| Static Axial Rating C0A | — | — | 0 N | — | — |
| B2 | — | — | — | — | - mm |
| Reference Speed (Nϑr) | — | 1,720 1/min | — | — | — |
| Da(Min.) | — | — | — | — | - mm |
| Maximum Recess Radius (Ra Max) | — | 3 mm | — | — | — |
| Db(Min.) | — | — | — | — | - mm |
| Maximum Diameter Of Housing Shoulder (Da) | — | 323 mm | — | — | — |
| Db(Max.) | — | — | — | — | - mm |
| Minimum Chamfer Dimension (R1 Min) | — | 4 mm | — | — | — |
| Dc(Min.) | — | — | — | — | - mm |
| Axial Displacement (S) | — | 4.7 mm | — | — | — |
| Dd(Min.) | — | — | — | — | - mm |
| Minimum Rib Diameter Outer Ring (D1 Min) | — | 295 mm | — | — | — |
| Da(Max.) | — | — | — | — | 324 mm |
| Maximum Diameter Of Shaft Shoulder (Da Max) | — | 227 mm | — | — | — |
| Maximum Recess Radius (Ra1 Max) | — | 3 mm | — | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 4 mm | — | — | — |
| Ra(Max.) | — | — | — | — | 3 mm |
| Raceway Diameter Outer Ring (E) | — | 306 mm | — | — | — |
| Rb(Max.) | — | — | — | — | 3 mm |
| Minimum Shaft Shoulder (Db Min) | — | 234 mm | — | — | — |
| Mass(Refer.) | — | — | — | — | 23.3 kg |
| Fatigue Load Limit, Radial (Cur) | — | 83,000 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 | — | — | — |
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.