SL185030 bearing: complete specifications & equivalents
The SL185030 is a ISO 15 radial bearing sized 150 x 225 x 100 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 150 mm |
| Outer diameter D | 225 mm |
| Width B | 100 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 810 kN |
| Basic static load rating C0 | 1390 kN |
| Fatigue load limit Pu | 186 kN |
| Reference speed (thermal) | 1150 rpm |
| Limiting speed (mechanical) | 1740 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 13300 g |
| Manufacturer designation | SL185030 |
| 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 & sl1850-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 8.858 in |
| Width B | 3.937 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 37.5 mm |
| Smallest bore in sl1850-series | 20 mm |
| Largest outer diameter in sl1850-series | 560 mm |
| Width range across sl1850-series | 30–243 mm |
| Bore position in sl1850-series (smallest first) | 21 of 35 |
| Bore above smallest sl1850-series size | 130 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL185030 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 SL185030 model number is decoded
envelope 150×225×100 mm with a 37.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 810 kN and C0 1390 kN; with a C/C0 ratio of 0.58 the 100 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 186 kN, the limiting speed 1,740 r/min and the thermal reference speed 1,150 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 5.40 kN per millimetre of the 150 mm bore and 8.10 kN per millimetre of the 100 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 13.3 kg (13300 g) (0.59 g per mm² of the 225×100 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads 150 mm bore, 225 mm outside diameter: at this size the 1390 kN C0 rating and rigid full-complement pack replace multi-bearing arrangements in compact heavy-duty designs Full-complement kinematics cap the speed at 1,740 r/min (reference 1,150 r/min); below that limit the double-row pack offers exceptional stiffness for its section The SL1850 tolerates no angular misalignment — the two roller rows distribute load only when shaft and housing axes are parallel, so housing bore alignment is a mounting requirement Typical applications include rolling-mill and steel-industry drives, hydraulic pumps and radial piston pumps and material handling conveyor pulleys, where the 225 mm outside diameter and 810 kN dynamic rating match the duty. In rolling-mill and steel-industry drives the unit fits a compact 150 mm seat, and in hydraulic pumps and radial piston pumps the 13.3 kg mass is part of the rotor inertia calculation. Designers also specify it for material handling conveyor pulleys, relying on the 100 mm width and the published 1390 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. 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
- heavy industrial gearbox shafts
- construction machinery slewing drives
- vibrating and oscillating machinery
- rope drums and winch drums
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.
- 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.
- The bearings cannot accommodate angular misalignment; check shaft and housing parallelism before blaming the bearing for edge spalling.
Frequently asked questions
What are the dimensions of the SL185030?
The SL185030 is a SL1850 double-row full-complement semi-locating cylindrical roller bearing with 225 mm outside diameter, 150 mm bore and 100 mm width, envelope 150×225×100 mm. Mass is 13.3 kg.
What does the SL185030 designation mean in the FAG/INA HR1 catalogue?
SL185030 identifies this SL1850 double-row full-complement semi-locating cylindrical roller bearing in the Schaeffler HR1 rolling bearings catalogue. The envelope is 150×225×100 mm and the catalogue ratings are C 810 kN, C0 1390 kN, Cur 186 kN.
What is the load capacity of the SL185030?
The basic dynamic load rating C is 810 kN and the basic static load rating C0 is 1390 kN; the fatigue load limit Cur is 186 kN.
What is the maximum speed of the SL185030?
The limiting speed is 1,740 r/min and the thermal reference speed is 1,150 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 SL185030?
The SL1850 is semi-locating: it carries axial load in one direction and permits the catalogue s-displacement in the other.
Reviewed & verified by the MPN Base engineering desk against source catalog HR1 2026-09-25 on 2026-09-30. Read our editorial & correction policy.