SL182214 bearing: complete specifications & equivalents
The SL182214 is a ISO 15 radial bearing sized 70 x 125 x 31 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 70 mm |
| Outer diameter D | 125 mm |
| Width B | 31 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 181 kN |
| Basic static load rating C0 | 223 kN |
| Fatigue load limit Pu | 34.5 kN |
| Reference speed (thermal) | 2340 rpm |
| Limiting speed (mechanical) | 3450 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1660 g |
| Manufacturer designation | SL182214 |
| Standard | ISO 15 |
| Catalog version | HR1 2026-09-25 |
| Last verified | 2026-09-30 |
Source: catalog reference (HR1 2026-09-25) · extracted 2026-09-30
Parameters extracted from the official FAG Rolling Bearings catalogue (HR1 2026-09-25); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.com.
Dimensions in inches & sl1822-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 1.22 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 27.5 mm |
| Smallest bore in sl1822-series | 20 mm |
| Largest outer diameter in sl1822-series | 360 mm |
| Width range across sl1822-series | 18–98 mm |
| Bore position in sl1822-series (smallest first) | 11 of 27 |
| Bore above smallest sl1822-series size | 50 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL182214 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the SL182214 model number is decoded
envelope 70×125×31 mm with a 27.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 181 kN and C0 223 kN; with a C/C0 ratio of 0.81 the 31 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 34.5 kN, the limiting speed 3,450 r/min and the thermal reference speed 2,340 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.59 kN per millimetre of the 70 mm bore and 5.84 kN per millimetre of the 31 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 1.66 kg (1660 g) (0.43 g per mm² of the 125×31 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 70 mm bore the 125 mm outside diameter and 31 mm width target rolling stands, construction machinery and heavy gearboxes; the limiting speed drops to 3,450 r/min The semi-locating function means this bearing locates the shaft in one axial direction and floats in the other — useful in two-bearing shafts where one position is fixed and the other absorbs expansion In the 125 mm envelope the cageless pack raises C0 to 223 kN; the trade is the 3,450 r/min limiting speed, set by roller-to-roller sliding rather than by a cage Typical applications include rolling-mill and steel-industry drives, hydraulic pumps and radial piston pumps and material handling conveyor pulleys, where the 125 mm outside diameter and 181 kN dynamic rating match the duty. In rolling-mill and steel-industry drives the unit fits a compact 70 mm seat, and in hydraulic pumps and radial piston pumps the 1.66 kg mass is part of the rotor inertia calculation. Designers also specify it for material handling conveyor pulleys, relying on the 31 mm width and the published 223 kN static rating. C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film. Use the rib structure correctly: SL18/SL1850 give one-direction axial guidance, SL0149 locates both ways and SL0249 floats — pairing two locating bearings on one shaft binds thermal growth.
Typical equipment & failure modes
Common applications
- compact slow-speed agitator drives
- rolling-mill and steel-industry drives
- crane travelling-wheel mechanisms
- heavy industrial gearbox shafts
Known failure patterns
- raceway pitting from overloaded slow-speed positions where the cageless rollers repeatedly stress one contact band
- rib and roller-end scoring when applied axial thrust exceeds the semi-locating capacity
- roller smearing from roller-to-roller sliding at speeds above the limiting value
- edge loading and premature spalling caused by undetected shaft/housing misalignment (full-complement rows cannot self-align)
- brinelling of the raceways from static shock during mounting or transport of the heavy rotor
- lubricant starvation in the tightly packed roller set, especially in the double-row executions
- freting and creep on a loose ring seat under a rotating load
- contamination wear in open gearbox positions with damaged seals or breathers
- false brinelling from micro-movement while the shaft is stationary under vibration
Selection pitfalls — read before you substitute
- C0 is the number that tempts overload in slow machinery, but fatigue life is still governed by the dynamic C rating and lubricant film.
- Use the rib structure correctly: SL18/SL1850 give one-direction axial guidance, SL0149 locates both ways and SL0249 floats — pairing two locating bearings on one shaft binds thermal growth.
- The split outer ring of SL0149 is joined by retaining rings for handling only; never use those rings as a thrust face in the design.
Frequently asked questions
What are the dimensions of the SL182214?
The SL182214 is a SL1822 single-row full-complement semi-locating cylindrical roller bearing with 125 mm outside diameter, 70 mm bore and 31 mm width, envelope 70×125×31 mm. Mass is 1.66 kg.
What does the SL182214 designation mean in the FAG/INA HR1 catalogue?
SL182214 identifies this SL1822 single-row full-complement semi-locating cylindrical roller bearing in the Schaeffler HR1 rolling bearings catalogue. The envelope is 70×125×31 mm and the catalogue ratings are C 181 kN, C0 223 kN, Cur 34.5 kN.
What is the load capacity of the SL182214?
The basic dynamic load rating C is 181 kN and the basic static load rating C0 is 223 kN; the fatigue load limit Cur is 34.5 kN.
What is the maximum speed of the SL182214?
The limiting speed is 3,450 r/min and the thermal reference speed is 2,340 r/min. In the Schaeffler catalogue the reference speed is the thermally permissible running speed under defined load; the lower of the two values governs each application.
What is the locating function of the SL182214?
This is a semi-locating bearing: one rib on the outer ring and two on the inner ring guide the shaft axially in one direction, while the other direction is free for thermal expansion.
Reviewed & verified by the MPN Base engineering desk against source catalog HR1 2026-09-25 on 2026-09-30. Read our editorial & correction policy.