Cross-brand designation analysis
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You entered 618-1250-MA. This table explores the base group 618; 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
“618” 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 | SKF618/670 MA670 × 820 × 69 mm | FAG618/670-M670 × 820 × 69 mm | TIMKEN618/670MA670 × 820 × 69 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | FAG | TIMKEN |
| Designation | 618/670 MA | 618/670-M | 618/670MA |
| Product family | Deep groove ball bearings | — | Radial Deep-Groove Ball |
| Detailed type | Deep groove ball bearings | Deep groove ball bearings | Deep groove ball bearings |
| Series | — | 618/670 | 61800 |
| Bore diameterd | 670 mm | 670 mm | 670 mm |
| Outside diameterD | 820 mm | 820 mm | 820 mm |
| WidthB | 69 mm | 69 mm | 69 mm |
| Basic dynamic load ratingC | 442 kN | 445 kN | 445 kN |
| Basic static load ratingC0 | 1000 kN | 910 kN | 911 kN |
| Fatigue load limitPu | 15.6 kN | 19.3 kN | — |
| Reference speednref | 1300 r/min | 760 r/min | — |
| Limiting speednG | 1100 r/min | 1250 r/min | — |
| Mass≈m | 77.5 kg | 76 kg | 78.7 kg |
| Precision class | Normal | PN — Normal (ISO 492:2023) | — |
| Internal clearance | CN | CN (Group N) — Normal internal clearance | — |
| Sealing | Without | Without — Not sealed | Open |
| Cage | Machined brass | M — Solid brass cage, rolling element guided | Brass cage |
| Bearing material | Bearing steel | — | — |
| Lubricant | None | Without — Bearing not greased | — |
| Minimum operating temperatureTmin | — | -30 °C | — |
| Maximum operating temperatureTmax | — | 200 °C | — |
| Calculation Factors | |||
| K Factor | — | — | 0.00 |
| Y1 Factor | — | — | 0.00 |
| Y2 Factor | — | — | 0.00 |
| Y0 Factor | — | — | 0.50 |
| E Factor | — | — | 0.00 |
| Cg Factor | — | — | 0.1918 |
| Calculation factors | |||
| Calculation factorf0 | — | 15.9 | — |
| 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 | — |
| Dimensions | |||
| Minimum chamfer dimensionrmin | — | 4 mm | — |
| Minimum chamfer dimensionrmin | — | 0.157 in | — |
| Shoulder diameter outer ringD1 | — | 774.3 mm | — |
| Shoulder diameter outer ringD1 | — | 30.484 in | — |
| Shoulder diameter inner ringd1 | — | 719.8 mm | — |
| Shoulder diameter inner ringd1 | — | 28.339 in | — |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | min. 685 mm | — | — |
| Diameter of housing abutmentD a | max. 805 mm | — | — |
| Radius of shaft or housing filletr a | max. 3 mm | — | — |
| Engineering — Calculation data | |||
| Minimum load factork r | 0.02 | — | — |
| Calculation factorf 0 | 17.4 | — | — |
| Engineering — Dimensions | |||
| Deviation limits of mid-range bore diametert Δdmp | -0.075 to 0 mm | — | — |
| Deviation limits of mid-range outside diametert ΔDmp | -0.1 to 0 mm | — | — |
| Deviation limits of ring widtht ΔBs | -0.75 to 0 mm | — | — |
| Shoulder diameterd 1 | ≈ 771.25 mm | — | — |
| Chamfer dimensionr 1,2 | min. 4 mm | — | — |
| ISO tolerance class for dimensions | Normal | — | — |
| Engineering — Tolerances of run-out | |||
| Range of section height at inner ring of assembled bearingt Kia | 80 µm | — | — |
| Range of section height at outer ring of assembled bearingt Kea | 140 µm | — | — |
| ISO tolerance class for geometrical tolerances | Normal | — | — |
| Logistics | |||
| Product net weight | 77.5 kg | — | — |
| eClass code | 23-05-08-01 | — | — |
| UNSPSC code | 31171504 | — | — |
| Main Dimensions & Performance Data | |||
| Basic dynamic load rating, radialCr | — | 445,000 N | — |
| Basic dynamic load rating, radialCr | — | 100,044.964 lbf | — |
| Basic static load rating, radialC0r | — | 910,000 N | — |
| Basic static load rating, radialC0r | — | 204,586.331 lbf | — |
| Fatigue load limit, radialCur | — | 19,300 N | — |
| Fatigue load limit, radialCur | — | 4,339.029 lbf | — |
| Manufacturer Identity | |||
| Schaeffler Product Code | — | 350290 | — |
| Material Number | — | — | 000000000101973633 |
| Base Type | — | 618/670 | — |
| World Assembly Part Number | — | — | 618/670MA |
| Old Designation | — | ["618/670M"] | — |
| Upc | — | — | 0013992462657 |
| Gpsd Group | — | S02 | — |
| Product Line Id | — | 14 | — |
| Official Source System | — | — | CORE BP - DS DF |
| Official Last Run | — | — | 2026-08-23T20:02:47.933 |
| SAP material number | — | 0190971230000 | — |
| Base product | — | 2305080101 | — |
| Bearing X designation | — | 618/670-M | — |
| Mounting Manager ID | — | 618/670-M | — |
| Grease application ID | — | 618/670-M | — |
| Mounting dimensions | |||
| Minimum diameter shaft shoulderda min | — | 684.6 mm | — |
| Minimum diameter shaft shoulderda min | — | 26.953 in | — |
| Maximum diameter of housing shoulderDa max | — | 805.4 mm | — |
| Maximum diameter of housing shoulderDa max | — | 31.709 in | — |
| Maximum fillet radiusra max | — | 3 mm | — |
| Maximum fillet radiusra max | — | 0.118 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 | |||
| Type Description | — | — | Radial Deep-Groove Ball |
| Construction | — | Deep groove ball bearing 618..-M, single row, solid brass cage | Single Row Deep Groove Ball Bearing | Imperial Series | 26.3780 in Bore | 32.2835 in OD | 2.7165 in Width | Open | Cylindrical Bore | Brass 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 | — | — |
| Candidate for remanufacturing | Yes | — | — |
| Indicative carbon footprint for new product | 287.0 kg CO 2 e | — | — |
| Indicative carbon footprint for remanufactured product | 95.3 kg CO 2 e | — | — |
| Technical Data | |||
| Overall Width | — | — | 0.000 mm |
| Radial Rating | — | — | 0 N |
| Bore Diameter (D) | — | 670 mm | — |
| Axial Rating | — | — | 0 N |
| Outside Diameter (D) | — | 820 mm | — |
| Dynamic Rating C1 | — | — | 445,000 N |
| Width (B) | — | 69 mm | — |
| Dynamic Rating C90 | — | — | 0 N |
| Basic Dynamic Load Rating, Radial (Cr) | — | 445,000 N | — |
| Dynamic Axial Rating Ca90 | — | — | 0 N |
| Basic Static Load Rating, Radial (C0R) | — | 910,000 N | — |
| Dynamic Axial Rating Ca1 | — | — | 0 N |
| Operating Temperature Min. (Tmin) | — | -30 °C | — |
| Static Radial Rating C0 | — | — | 911,000 N |
| Limiting Speed (Ng) | — | 1,250 1/min | — |
| Extended Dynamic Rating Ce | — | — | 0 N |
| Operating Temperature Max. (Tmax) | — | 200 °C | — |
| Static Axial Rating C0A | — | — | 0 N |
| Reference Speed (Nϑr) | — | 760 1/min | — |
| Calculation Factor (F0) | — | 15.9 | — |
| Fatigue Load Limit, Radial (Cur) | — | 19,300 N | — |
| Minimum Diameter Shaft Shoulder (Da Min) | — | 684.6 mm | — |
| Shoulder Diameter Inner Ring (D1) | — | 719.8 mm | — |
| Maximum Diameter Of Housing Shoulder (Da Max) | — | 805.4 mm | — |
| Minimum Chamfer Dimension (Rmin) | — | 4 mm | — |
| Maximum Fillet Radius (Ra Max) | — | 3 mm | — |
| Shoulder Diameter Outer Ring (D1) | — | 774.3 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.