SL182215 bearing: complete specifications & equivalents
The SL182215 is a ISO 15 radial bearing sized 75 x 130 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 | 75 mm |
| Outer diameter D | 130 mm |
| Width B | 31 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 187 kN |
| Basic static load rating C0 | 236 kN |
| Fatigue load limit Pu | 36.5 kN |
| Reference speed (thermal) | 2210 rpm |
| Limiting speed (mechanical) | 3250 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1750 g |
| Manufacturer designation | SL182215 |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 5.118 in |
| Width B | 1.22 in |
| ISO bore code | 15 |
| 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) | 12 of 27 |
| Bore above smallest sl1822-series size | 55 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL182215 | 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 SL182215 model number is decoded
envelope 75×130×31 mm with a 27.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 187 kN and C0 236 kN; with a C/C0 ratio of 0.79 the 31 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 36.5 kN, the limiting speed 3,250 r/min and the thermal reference speed 2,210 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 2.49 kN per millimetre of the 75 mm bore and 6.03 kN per millimetre of the 31 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 1.75 kg (1750 g) (0.43 g per mm² of the 130×31 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads with a 75 mm bore this is a heavy-industrial bearing: 1.75 kg of stiff ring and roller set, specified where rigidity matters more than speed SL18 bearings are separable for mounting: the inner ring with the self-retained roller set can be fitted separately from the plain-bored outer ring, which simplifies interference-fit assembly Reading the designation: SL18 marks the Schaeffler full-complement semi-locating type with one rib on the outer ring and two ribs on the inner ring; the rollers are axially guided by the inner ring while the outer ring can displace by the catalogue s-value Typical applications include hydraulic pumps and radial piston pumps, marine and offshore winch arrangements and rolling-mill and steel-industry drives, where the 130 mm outside diameter and 187 kN dynamic rating match the duty. In hydraulic pumps and radial piston pumps the unit fits a compact 75 mm seat, and in marine and offshore winch arrangements the 1.75 kg mass is part of the rotor inertia calculation. Designers also specify it for rolling-mill and steel-industry drives, relying on the 31 mm width and the published 236 kN static rating. The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling. Press-fit the correct ring: the rotating ring needs interference while the floating ring must slide on its seat to perform the non-locating function.
Typical equipment & failure modes
Common applications
- vibrating and oscillating machinery
- planetary gear bearing positions
- rope drums and winch drums
- marine and offshore winch arrangements
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
- The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.
- Press-fit the correct ring: the rotating ring needs interference while the floating ring must slide on its seat to perform the non-locating function.
- There is no cage: do not apply caged-bearing speed rules — the printed limiting speed is a hard kinematic ceiling set by roller-to-roller contact.
Frequently asked questions
What are the dimensions of the SL182215?
The SL182215 is a SL1822 single-row full-complement semi-locating cylindrical roller bearing with 130 mm outside diameter, 75 mm bore and 31 mm width, envelope 75×130×31 mm. Mass is 1.75 kg.
What does the SL182215 designation mean in the FAG/INA HR1 catalogue?
SL182215 identifies this SL1822 single-row full-complement semi-locating cylindrical roller bearing in the Schaeffler HR1 rolling bearings catalogue. The envelope is 75×130×31 mm and the catalogue ratings are C 187 kN, C0 236 kN, Cur 36.5 kN.
What is the load capacity of the SL182215?
The basic dynamic load rating C is 187 kN and the basic static load rating C0 is 236 kN; the fatigue load limit Cur is 36.5 kN.
What is the maximum speed of the SL182215?
The limiting speed is 3,250 r/min and the thermal reference speed is 2,210 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 SL182215?
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.