SL183006-XL bearing: complete specifications & equivalents
The SL183006-XL is a ISO 15 radial bearing sized 30 x 55 x 19 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 30 mm |
| Outer diameter D | 55 mm |
| Width B | 19 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 45 kN |
| Basic static load rating C0 | 42 kN |
| Fatigue load limit Pu | 7.6 kN |
| Reference speed (thermal) | 5600 rpm |
| Limiting speed (mechanical) | 8100 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 200 g |
| Manufacturer designation | SL183006-XL |
| 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 & sl1830-series range
| Bore d | 1.181 in |
|---|---|
| Outer diameter D | 2.165 in |
| Width B | 0.748 in |
| ISO bore code | 06 |
| Radial section height (D−d)/2 | 12.5 mm |
| Smallest bore in sl1830-series | 20 mm |
| Largest outer diameter in sl1830-series | 600 mm |
| Width range across sl1830-series | 16–148 mm |
| Bore position in sl1830-series (smallest first) | 3 of 36 |
| Bore above smallest sl1830-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL183006 | 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 SL183006-XL model number is decoded
envelope 30×55×19 mm with a 12.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 45 kN and C0 42 kN; with a C/C0 ratio of 1.07 the 19 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 7.6 kN, the limiting speed 8,100 r/min and the thermal reference speed 5,600 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 1.50 kN per millimetre of the 30 mm bore and 2.37 kN per millimetre of the 19 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 200 g (0.19 g per mm² of the 55×19 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads at 30 mm bore this size balances the 55 mm outside diameter against machineability of the adjacent parts — the most frequently specified band in the HR1 range 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 The dimension-series digits place this bearing in the SL18 section of the HR1 plan, giving the 12.5 mm section height between the 30 mm bore and the 55 mm outside diameter As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 7.6 kN Cur value. Typical applications include rope drums and winch drums, vibrating and oscillating machinery and marine and offshore winch arrangements, where the 55 mm outside diameter and 45 kN dynamic rating match the duty. In rope drums and winch drums the unit fits a compact 30 mm seat, and in vibrating and oscillating machinery the 200 g mass suits the compact, space-optimised housing. Designers also specify it for marine and offshore winch arrangements, relying on the 19 mm width and the published 42 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
- planetary gear bearing positions
- hydraulic pumps and radial piston pumps
- compact slow-speed agitator drives
- crane travelling-wheel mechanisms
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 SL183006-XL?
The SL183006-XL is a SL1830 single-row full-complement semi-locating cylindrical roller bearing with 55 mm outside diameter, 30 mm bore and 19 mm width, envelope 30×55×19 mm. Mass is 200 g.
What does the SL183006-XL designation mean in the FAG/INA HR1 catalogue?
SL183006-XL identifies this SL1830 single-row full-complement semi-locating cylindrical roller bearing in the Schaeffler HR1 rolling bearings catalogue; the -XL suffix marks the X-life execution. The envelope is 30×55×19 mm and the catalogue ratings are C 45 kN, C0 42 kN, Cur 7.6 kN.
What is the load capacity of the SL183006-XL?
The basic dynamic load rating C is 45 kN and the basic static load rating C0 is 42 kN; the fatigue load limit Cur is 7.6 kN.
What is the maximum speed of the SL183006-XL?
The limiting speed is 8,100 r/min and the thermal reference speed is 5,600 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 SL183006-XL?
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.