Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
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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
“6338” across 4 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 | SKF6338 M190 × 400 × 78 mm | FAG6338-M190 × 400 × 78 mm | NSK6338190 × 400 × 78 mm | KOYO6338190 × 400 × 78 mm |
|---|---|---|---|---|
| Comparable specifications | ||||
| Brand | SKF | FAG | NSK | KOYO |
| Designation | 6338 M | 6338-M | 6338 | 6338 |
| Product family | Deep groove ball bearings | — | Single row deep groove ball bearings | Single-row / Open type |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Series | — | 6338 | — | — |
| Bore diameterd | 190 mm | 190 mm | 190 mm | 190 mm |
| Outside diameterD | 400 mm | 400 mm | 400 mm | 400 mm |
| WidthB | 78 mm | 78 mm | 78 mm | 78 mm |
| Basic dynamic load ratingC | 371 kN | 380 kN | 390 kN | 443 kN |
| Basic static load ratingC0 | 430 kN | 455 kN | 415 kN | 415 kN |
| Fatigue load limitPu | 10.8 kN | 18.7 kN | — | 21.3 kN |
| Reference speednref | 3400 r/min | 2290 r/min | — | — |
| Limiting speednG | 3000 r/min | 2850 r/min | — | 1500 r/min |
| Mass≈m | 48.3 kg | 50.4 kg | 49.7 kg | 51.5 kg |
| Precision class | Normal | PN — Normal (ISO 492:2023) | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — |
| Sealing | Without | Without — Not sealed | Open | Open |
| Cage | Machined brass | M — Solid brass cage, rolling element guided | — | — |
| Bearing material | Bearing steel | — | — | — |
| Lubricant | None | Without — Bearing not greased | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — |
| Maximum operating temperatureTmax | — | 200 °C | — | — |
| Boundary dimensions | ||||
| Bearing widthB | — | — | 78 mm | — |
| Minimum bearing chamferr min. | — | — | 5 mm | — |
| Calculation factors | ||||
| Calculation factorf0 | — | 13.9 | — | — |
| Capabilities & suitability | ||||
| Radial load capacity | — | Yes | — | — |
| Axial load capacity in one direction | — | Yes | — | — |
| Axial load capacity in both directions | — | Yes | — | — |
| Suitable for grease lubrication | — | Yes | — | — |
| Suitable for oil lubrication | — | Yes | — | — |
| Unsealed design | — | Yes | — | — |
| Largebearing | — | Yes | — | — |
| Classification | ||||
| Official Category Path | — | — | — | Deep groove ball bearings - Single-row - Open type |
| Official Classification 1 | — | — | — | Deep groove ball bearings / Single-row / Open type |
| Construction | ||||
| Catalogue closure construction | — | — | Open | — |
| Dimensions | ||||
| Minimum chamfer dimensionrmin | — | 5 mm | — | — |
| Minimum chamfer dimensionrmin | — | 0.197 in | — | — |
| Shoulder diameter outer ringD1 | — | 334 mm | — | — |
| Shoulder diameter outer ringD1 | — | 13.15 in | — | — |
| Shoulder diameter inner ringd1 | — | 258.15 mm | — | — |
| Shoulder diameter inner ringd1 | — | 10.163 in | — | — |
| Engineering — Abutment dimensions | ||||
| Diameter of shaft abutmentd a | min. 210 mm | — | — | — |
| Diameter of housing abutmentD a | max. 380 mm | — | — | — |
| Radius of shaft or housing filletr a | max. 4 mm | — | — | — |
| Engineering — Calculation data | ||||
| Minimum load factork r | 0.03 | — | — | — |
| Calculation factorf 0 | 14 | — | — | — |
| Engineering — Dimensions | ||||
| Deviation limits of mid-range bore diametert Δdmp | -0.03 to 0 mm | — | — | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.04 to 0 mm | — | — | — |
| Deviation limits of ring widtht ΔBs | -0.3 to 0 mm | — | — | — |
| Shoulder diameterd 1 | ≈ 330.5 mm | — | — | — |
| Chamfer dimensionr 1,2 | min. 5 mm | — | — | — |
| ISO tolerance class for dimensions | Normal | — | — | — |
| Engineering — Tolerances of run-out | ||||
| Range of section height at inner ring of assembled bearingt Kia | 40 µm | — | — | — |
| Range of section height at outer ring of assembled bearingt Kea | 70 µm | — | — | — |
| ISO tolerance class for geometrical tolerances | Normal | — | — | — |
| Load ratings | ||||
| Basic dynamic radial load ratingCr | — | — | 390000 N | — |
| Basic static radial load ratingC0r | — | — | 415000 N | — |
| Equivalent-load calculation factorf0 | — | — | 14.1 | — |
| Logistics | ||||
| Product net weight | 48.3 kg | — | — | — |
| eClass code | 23-05-08-01 | — | — | — |
| UNSPSC code | 31171504 | — | — | — |
| Lubrication-qualified speed | ||||
| Limiting speed with grease | — | — | 1400 r/min | — |
| Limiting speed with oil (open bearing) | — | — | 1700 r/min | — |
| Main Dimensions & Performance Data | ||||
| Basic dynamic load rating, radialCr | — | 380,000 N | — | — |
| Basic dynamic load rating, radialCr | — | 85,431.655 lbf | — | — |
| Basic static load rating, radialC0r | — | 455,000 N | — | — |
| Basic static load rating, radialC0r | — | 102,293.165 lbf | — | — |
| Fatigue load limit, radialCur | — | 18,700 N | — | — |
| Fatigue load limit, radialCur | — | 4,204.137 lbf | — | — |
| Manufacturer Identity | ||||
| Schaeffler Product Code | — | 352272 | — | — |
| Official Class Key | — | — | — | 010-010-010 |
| Base Type | — | 6338 | — | — |
| Old Designation | — | ["6338M"] | — | — |
| Gpsd Group | — | S02 | — | — |
| Product Line Id | — | 14 | — | — |
| SAP material number | — | 0191122460000 | — | — |
| Base product | — | 2305080101 | — | — |
| Bearing X designation | — | 6338-M | — | — |
| Mounting Manager ID | — | 6338-M | — | — |
| Grease application ID | — | 6338-M | — | — |
| Mounting dimensions | ||||
| Minimum shaft shoulder diameterda min. | — | — | 210 mm | — |
| Maximum housing shoulder diameterDa max. | — | — | 380 mm | — |
| Maximum shaft or housing fillet radiusra max. | — | — | 4 mm | — |
| Minimum diameter shaft shoulderda min | — | 210 mm | — | — |
| Minimum diameter shaft shoulderda min | — | 8.268 in | — | — |
| Maximum diameter of housing shoulderDa max | — | 380 mm | — | — |
| Maximum diameter of housing shoulderDa max | — | 14.961 in | — | — |
| Maximum fillet radiusra max | — | 4 mm | — | — |
| Maximum fillet radiusra max | — | 0.157 in | — | — |
| Product characteristics | ||||
| Type of SealWithout | — | Not sealed | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — |
| Dimensional / heat stabilizationS1 | — | Rings dimensional stabilized up to 200° | — | — |
| Radial internal clearanceCN (Group N) | — | Normal internal clearance | — | — |
| Bore typeZ | — | Cylindrical | — | — |
| Product identity | ||||
| Official product category | Deep groove ball bearings | — | — | — |
| Official taxonomy path | /products/rolling-bearings/ball-bearings/deep-groove-ball-bearings | — | — | — |
| Structure group ID | BB1_001_101 | — | — | — |
| Available from SKF | Yes | — | — | — |
| Remanufacturable | Yes | — | — | — |
| Product Identity | ||||
| Construction | — | Deep groove ball bearing 63..-M, single row, solid brass cage | — | — |
| Short Description | — | Deep groove ball bearing | — | — |
| Properties | ||||
| Filling slots | Without | — | — | — |
| Number of rows | 1 | — | — | — |
| Locating feature, bearing outer ring | Without | — | — | — |
| Bore type | Cylindrical | — | — | — |
| Matched arrangement | No | — | — | — |
| Radial internal clearance | CN | — | — | — |
| Material, bearing | Bearing steel | — | — | — |
| Coating | Without | — | — | — |
| Relubrication feature | Without | — | — | — |
| Candidate for remanufacturing | Yes | — | — | — |
| Indicative carbon footprint for new product | 179.0 kg CO 2 e | — | — | — |
| Indicative carbon footprint for remanufactured product | 59.5 kg CO 2 e | — | — | — |
| Reference mass | ||||
| Approximate catalogue mass (open reference) | — | — | 49.7 kg | — |
| Technical Data | ||||
| d | — | — | — | 400 mm |
| B | — | — | — | 78 mm |
| R(Min.) | — | — | — | 5 mm |
| Bore Diameter (D) | — | 190 mm | — | — |
| Basic Load Ratings : Cr | — | — | — | 443 kN |
| Outside Diameter (D) | — | 400 mm | — | — |
| Basic Load Ratings : C0R | — | — | — | 415 kN |
| Width (B) | — | 78 mm | — | — |
| Fatigue Load Limit : Cu | — | — | — | 21.3 kN |
| Basic Dynamic Load Rating, Radial (Cr) | — | 380,000 N | — | — |
| Factor : F0 | — | — | — | 14.1 |
| Basic Static Load Rating, Radial (C0R) | — | 455,000 N | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | 1500 min-1 |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | 1800 min-1 |
| Limiting Speed (Ng) | — | 2,850 1/min | — | — |
| Da(Min.) | — | — | — | 210 mm |
| Operating Temperature Max. (Tmax) | — | 200 °C | — | — |
| Da(Max.) | — | — | — | 380 mm |
| Reference Speed (Nϑr) | — | 2,290 1/min | — | — |
| Ra(Max.) | — | — | — | 4 mm |
| Calculation Factor (F0) | — | 13.9 | — | — |
| Mass(Refer.) | — | — | — | 51.5 kg |
| Fatigue Load Limit, Radial (Cur) | — | 18,700 N | — | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 210 mm | — | — |
| Shoulder Diameter Inner Ring (D1) | — | 258.15 mm | — | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 380 mm | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 5 mm | — | — |
| Maximum Fillet Radius (Ra Max) | — | 4 mm | — | — |
| Shoulder Diameter Outer Ring (D1) | — | 334 mm | — | — |
| Temperature range | ||||
| Operating temperature min.Tmin | — | -30 °C | — | — |
| Operating temperature min.Tmin | — | -22 °F | — | — |
| Operating temperature max.Tmax | — | 200 °C | — | — |
| Operating temperature max.Tmax | — | 392 °F | — | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.