Cross-brand designation analysis
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You entered 6311-RS. This table explores the base group 6311; it does not preserve or approve every requested suffix. Search your complete marking first →
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One base designation across loaded brands
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Dimensions verified
“6311” across 6 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 | SKF631155 × 120 × 29 mm | FAG631155 × 120 × 29 mm | TIMKEN631155 × 120 × 29 mm | NSK631155 × 120 × 29 mm | KOYO631155 × 120 × 29 mm | NTN631155 × 120 × 29 mm |
|---|---|---|---|---|---|---|
| Comparable specifications | ||||||
| Brand | SKF | FAG | TIMKEN | NSK | KOYO | NTN |
| Designation | 6311 | 6311 | 6311 | 6311 | 6311 | 6311 |
| Product family | Deep groove ball bearings | — | Radial Deep-Groove Ball | Single row deep groove ball bearings | Single-row / Open type | Single row deep groove ball bearings |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Series | — | — | 6300 | — | — | — |
| Bore diameterd | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm | 55 mm |
| Outside diameterD | 120 mm | 120 mm | 120 mm | 120 mm | 120 mm | 120 mm |
| WidthB | 29 mm | 29 mm | 29 mm | 29 mm | 29 mm | 29 mm |
| Basic dynamic load ratingC | 74.1 kN | 83 kN | 71.6 kN | 78.5 kN | 89.5 kN | 79.5 kN |
| Basic static load ratingC0 | 45 kN | 47.5 kN | 44.8 kN | 44.5 kN | 45 kN | 45 kN |
| Fatigue load limitPu | 1.9 kN | 3.25 kN | — | — | 3.45 kN | 3.5 kN |
| Reference speednref | 12000 r/min | 7100 r/min | — | — | — | — |
| Limiting speednG | 8000 r/min | 8500 r/min | — | — | 5600 r/min | — |
| Mass≈m | 1.34 kg | 1.329 kg | 1.37 kg | 1.37 kg | 1.37 kg | 1.37 kg |
| Precision class | P6 and tighter width tolerance | PN — Normal (ISO 492:2023) | — | — | — | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — | — | — | CN |
| Sealing | Without | Without — Not sealed | Open | Open | Open | open |
| Cage | Sheet metal | JN — Steel sheet metal | Steel cage | — | — | pressed steel cage |
| Bearing material | Bearing steel | — | — | — | — | — |
| Lubricant | None | Without — Bearing not greased | — | — | — | — |
| Minimum operating temperatureTmin | — | -30 °C | — | — | — | -40 °C |
| Maximum operating temperatureTmax | — | 150 °C | — | — | — | 120 °C |
| Boundary dimensions | ||||||
| Bearing widthB | — | — | — | 29 mm | — | — |
| Minimum bearing chamferr min. | — | — | — | 2 mm | — | — |
| Calculation Factors | ||||||
| K Factor | — | — | 0.00 | — | — | — |
| Y1 Factor | — | — | 0.00 | — | — | — |
| Y2 Factor | — | — | 0.00 | — | — | — |
| Y0 Factor | — | — | 0.50 | — | — | — |
| E Factor | — | — | 0.00 | — | — | — |
| Cg Factor | — | — | 0.0480 | — | — | — |
| Calculation factors | ||||||
| Calculation factorf0 | — | 12.9 | — | — | — | — |
| 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 | — | — | — | — |
| 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 | — | 2 mm | — | — | — | — |
| Minimum chamfer dimensionrmin | — | 0.079 in | — | — | — | — |
| Shoulder diameter outer ringD1 | — | 101.13 mm | — | — | — | — |
| Shoulder diameter outer ringD1 | — | 3.981 in | — | — | — | — |
| Caliber diameter outer ringD2 | — | 104.26 mm | — | — | — | — |
| Caliber diameter outer ringD2 | — | 4.105 in | — | — | — | — |
| Shoulder diameter inner ringd1 | — | 75.2 mm | — | — | — | — |
| Shoulder diameter inner ringd1 | — | 2.961 in | — | — | — | — |
| Dimensions and properties | ||||||
| Internal diameterd | — | — | — | — | — | 55 mm |
| External diameterD | — | — | — | — | — | 120 mm |
| Bearing/Inner ring widthB | — | — | — | — | — | 29 mm |
| Min fillet radiusrs | — | — | — | — | — | 2 mm |
| Radial clearance class | — | — | — | — | — | CN |
| Engineering — Abutment dimensions | ||||||
| Diameter of shaft abutmentd a | min. 66 mm | — | — | — | — | — |
| Diameter of housing abutmentD a | max. 109 mm | — | — | — | — | — |
| Radius of shaft or housing filletr a | max. 2 mm | — | — | — | — | — |
| Engineering — Calculation data | ||||||
| SKF performance class | SKF Explorer | — | — | — | — | — |
| Minimum load factork r | 0.03 | — | — | — | — | — |
| Calculation factorf 0 | 13.1 | — | — | — | — | — |
| Engineering — Dimensions | ||||||
| Deviation limits of mid-range bore diametert Δdmp | -0.012 to 0 mm | — | — | — | — | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.013 to 0 mm | — | — | — | — | — |
| Deviation limits of ring widtht ΔBs | -0.1 to 0 mm | — | — | — | — | — |
| Shoulder diameterd 1 | ≈ 75.34 mm | — | — | — | — | — |
| Recess diameterD 2 | ≈ 103.7 mm | — | — | — | — | — |
| Chamfer dimensionr 1,2 | min. 2 mm | — | — | — | — | — |
| ISO tolerance class for dimensions | P6 and tighter width tolerance | — | — | — | — | — |
| Engineering — Tolerances of run-out | ||||||
| Range of section height at inner ring of assembled bearingt Kia | 20 µm | — | — | — | — | — |
| Range of section height at outer ring of assembled bearingt Kea | 35 µm | — | — | — | — | — |
| ISO tolerance class for geometrical tolerances | Normal | — | — | — | — | — |
| Load ratings | ||||||
| Basic dynamic radial load ratingCr | — | — | — | 78500 N | — | — |
| Basic static radial load ratingC0r | — | — | — | 44500 N | — | — |
| Equivalent-load calculation factorf0 | — | — | — | 13.1 | — | — |
| Logistics | ||||||
| Product net weight | 1.34 kg | — | — | — | — | — |
| eClass code | 23-05-08-01 | — | — | — | — | — |
| UNSPSC code | 31171504 | — | — | — | — | — |
| Lubrication-qualified speed | ||||||
| Limiting speed with grease | — | — | — | 6700 r/min | — | — |
| Limiting speed with oil (open bearing) | — | — | — | 8000 r/min | — | — |
| Main Dimensions & Performance Data | ||||||
| Basic dynamic load rating, radialCr | — | 83,000 N | — | — | — | — |
| Basic dynamic load rating, radialCr | — | 18,660.072 lbf | — | — | — | — |
| Basic static load rating, radialC0r | — | 47,500 N | — | — | — | — |
| Basic static load rating, radialC0r | — | 10,678.957 lbf | — | — | — | — |
| Fatigue load limit, radialCur | — | 3,250 N | — | — | — | — |
| Fatigue load limit, radialCur | — | 730.665 lbf | — | — | — | — |
| Manufacturer Identity | ||||||
| Schaeffler Product Code | — | 351810 | — | — | — | — |
| Material Number | — | — | 000000000100417005 | — | — | — |
| Official Class Key | — | — | — | — | 010-010-010 | — |
| Base Type | — | 6311 | — | — | — | — |
| World Assembly Part Number | — | — | 6311DGBB | — | — | — |
| Gpsd Group | — | S01 | — | — | — | — |
| Upc | — | — | 0087796295780 | — | — | — |
| Product Line Id | — | 14 | — | — | — | — |
| X Life Marking | — | n.r. | — | — | — | — |
| Official Source System | — | — | CORE BP - DS DF | — | — | — |
| Official Last Run | — | — | 2026-08-23T20:02:47.497 | — | — | — |
| SAP material number | — | 0167237240000 | — | — | — | — |
| Base product | — | 2305080101 | — | — | — | — |
| Bearing X designation | — | 6311 | — | — | — | — |
| Mounting Manager ID | — | 6311 | — | — | — | — |
| Grease application ID | — | 6311 | — | — | — | — |
| Mounting dimensions | ||||||
| Minimum shaft shoulder diameterda min. | — | — | — | 64 mm | — | — |
| Maximum shaft shoulder diameterda max. | — | — | — | 72.5 mm | — | — |
| Maximum housing shoulder diameterDa max. | — | — | — | 111 mm | — | — |
| Maximum shaft or housing fillet radiusra max. | — | — | — | 2 mm | — | — |
| Min shoulder diameter IRda min | — | — | — | — | — | 64 mm |
| Max shoulder diameter ORDa max | — | — | — | — | — | 111 mm |
| Max shaft & housing fillet radiusra max | — | — | — | — | — | 2 mm |
| Minimum diameter shaft shoulderda min | — | 66 mm | — | — | — | — |
| Minimum diameter shaft shoulderda min | — | 2.598 in | — | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 109 mm | — | — | — | — |
| Maximum diameter of housing shoulderDa max | — | 4.291 in | — | — | — | — |
| Maximum fillet radiusra max | — | 2 mm | — | — | — | — |
| Maximum fillet radiusra max | — | 0.079 in | — | — | — | — |
| Performance | ||||||
| Dynamic loadC | — | — | — | — | — | 79.5 kN |
| Static loadC0 | — | — | — | — | — | 45 kN |
| Fatigue limit loadCu | — | — | — | — | — | 3.5 kN |
| Coefficientf0 | — | — | — | — | — | 13.2 |
| Oil lubrication limit speedN lim | — | — | — | — | — | 6800 r/min |
| Grease lubrication limit speedN lim | — | — | — | — | — | 5800 r/min |
| Min operating temperatureTmin | — | — | — | — | — | -40 °C |
| Max operating temperatureTmax | — | — | — | — | — | 120 °C |
| Product characteristics | ||||||
| Catalogue construction | — | — | — | — | — | Deep groove ball bearing, radial contact, pressed steel cage, open |
| Cage construction | — | — | — | — | — | pressed steel cage |
| Closure construction | — | — | — | — | — | open |
| Type of SealWithout | — | Not sealed | — | — | — | — |
| Tolerance classPN | — | Normal (ISO 492:2023) | — | — | — | — |
| Dimensional / heat stabilizationS0 | — | Rings dimensional stabilized up to 150° | — | — | — | — |
| 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 | No | — | — | — | — | — |
| Product Identity | ||||||
| Type Description | — | — | Radial Deep-Groove Ball | — | — | — |
| Construction | — | Deep groove ball bearing 63, single row, steel sheet metal cage | Single Row Deep Groove Ball Bearing | Imperial Series | 2.1654 in Bore | 4.7244 in OD | 1.1417 in Width | Open | Cylindrical Bore | Steel Cage | C0 Clearance | ISO P0 Tolerance | — | — | — |
| Number Of Rows | 1 | — | 1 | — | — | — |
| Short Description | — | Deep groove ball bearing | — | — | — | — |
| Tapered Bore | — | — | N | — | — | — |
| Properties | ||||||
| Filling slots | Without | — | — | — | — | — |
| 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 | — | — | — | — | — |
| Indicative carbon footprint for new product | 5.0 kg CO 2 e | — | — | — | — | — |
| Reference mass | ||||||
| Approximate catalogue mass (open reference) | — | — | — | 1.37 kg | — | — |
| Technical Data | ||||||
| d | — | — | — | — | 120 mm | — |
| Overall Width | — | — | 0.000 mm | — | — | — |
| B | — | — | — | — | 29 mm | — |
| Radial Rating | — | — | 0 N | — | — | — |
| R(Min.) | — | — | — | — | 2 mm | — |
| Bore Diameter (D) | — | 55 mm | — | — | — | — |
| Axial Rating | — | — | 0 N | — | — | — |
| Basic Load Ratings : Cr | — | — | — | — | 89.5 kN | — |
| Outside Diameter (D) | — | 120 mm | — | — | — | — |
| Dynamic Rating C1 | — | — | 71,600 N | — | — | — |
| Basic Load Ratings : C0R | — | — | — | — | 45.0 kN | — |
| Width (B) | — | 29 mm | — | — | — | — |
| Dynamic Rating C90 | — | — | 0 N | — | — | — |
| Fatigue Load Limit : Cu | — | — | — | — | 3.45 kN | — |
| Basic Dynamic Load Rating, Radial (Cr) | — | 83,000 N | — | — | — | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N | — | — | — |
| Factor : F0 | — | — | — | — | 13.2 | — |
| Basic Static Load Rating, Radial (C0R) | — | 47,500 N | — | — | — | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N | — | — | — |
| Limiting Speeds(Grease Lub.) | — | — | — | — | 5600 min-1 | — |
| Operating Temperature Min. (Tmin) | — | -30 °C | — | — | — | — |
| Static Radial Rating C0 | — | — | 44,800 N | — | — | — |
| Limiting Speeds(Oil Lub.) | — | — | — | — | 6700 min-1 | — |
| Limiting Speed (Ng) | — | 8,500 1/min | — | — | — | — |
| Extended Dynamic Rating Ce | — | — | 0 N | — | — | — |
| Da(Min.) | — | — | — | — | 64 mm | — |
| Operating Temperature Max. (Tmax) | — | 150 °C | — | — | — | — |
| Static Axial Rating C0A | — | — | 0 N | — | — | — |
| Da(Max.) | — | — | — | — | 111 mm | — |
| Reference Speed (Nϑr) | — | 7,100 1/min | — | — | — | — |
| Ra(Max.) | — | — | — | — | 2 mm | — |
| Calculation Factor (F0) | — | 12.9 | — | — | — | — |
| Mass(Refer.) | — | — | — | — | 1.37 kg | — |
| Fatigue Load Limit, Radial (Cur) | — | 3,250 N | — | — | — | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 66 mm | — | — | — | — |
| Shoulder Diameter Inner Ring (D1) | — | 75.2 mm | — | — | — | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 109 mm | — | — | — | — |
| Minimum Chamfer Dimension (Rmin) | — | 2 mm | — | — | — | — |
| Maximum Fillet Radius (Ra Max) | — | 2 mm | — | — | — | — |
| Shoulder Diameter Outer Ring (D1) | — | 101.13 mm | — | — | — | — |
| Caliber Diameter Outer Ring (D1) | — | 104.26 mm | — | — | — | — |
| 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.