SL192311-XL bearing: complete specifications & equivalents
The SL192311-XL is a ISO 15 radial bearing sized 55 x 120 x 43 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 55 mm |
| Outer diameter D | 120 mm |
| Width B | 43 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 270 kN |
| Basic static load rating C0 | 250 kN |
| Fatigue load limit Pu | 48.5 kN |
| Reference speed (thermal) | 2550 rpm |
| Limiting speed (mechanical) | 3750 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2280 g |
| Manufacturer designation | SL192311-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 & sl1923-series range
| Bore d | 2.165 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 1.693 in |
| ISO bore code | 11 |
| Radial section height (D−d)/2 | 32.5 mm |
| Smallest bore in sl1923-series | 25 mm |
| Largest outer diameter in sl1923-series | 540 mm |
| Width range across sl1923-series | 24–165 mm |
| Bore position in sl1923-series (smallest first) | 7 of 29 |
| Bore above smallest sl1923-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL192311 | 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 SL192311-XL model number is decoded
envelope 55×120×43 mm with a 32.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 270 kN and C0 250 kN; with a C/C0 ratio of 1.08 the 43 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 48.5 kN, the limiting speed 3,750 r/min and the thermal reference speed 2,550 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 4.91 kN per millimetre of the 55 mm bore and 6.28 kN per millimetre of the 43 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 2.28 kg (2280 g) (0.44 g per mm² of the 120×43 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads 55 mm bore marks the medium range: mounting forces and fits become critical, and the 2280 g mass calls for proper induction or press tooling rather than hand fitting At 3,750 r/min limiting speed the SL1923 is a slow-speed, high-load bearing — the cageless rollers trade kinematic speed for the 270 kN dynamic rating X-life status (-XL) indicates the current Schaeffler premium execution at 55 mm bore; the 250 kN C0 rating reflects the improved rolling-contact geometry. Typical applications include heavy industrial gearbox shafts, crane travelling-wheel mechanisms and vibrating and oscillating machinery, where the 120 mm outside diameter and 270 kN dynamic rating match the duty. In heavy industrial gearbox shafts the unit fits a compact 55 mm seat, and in crane travelling-wheel mechanisms the 2.28 kg mass is part of the rotor inertia calculation. Designers also specify it for vibrating and oscillating machinery, relying on the 43 mm width and the published 250 kN static rating. 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.
Typical equipment & failure modes
Common applications
- hydraulic pumps and radial piston pumps
- heavy industrial gearbox shafts
- rolling-mill and steel-industry drives
- material handling conveyor pulleys
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
- 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.
- 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 SL192311-XL?
The SL192311-XL is a SL1923 single-row full-complement semi-locating cylindrical roller bearing with 120 mm outside diameter, 55 mm bore and 43 mm width, envelope 55×120×43 mm. Mass is 2.28 kg.
What does the SL192311-XL designation mean in the FAG/INA HR1 catalogue?
SL192311-XL identifies this SL1923 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 55×120×43 mm and the catalogue ratings are C 270 kN, C0 250 kN, Cur 48.5 kN.
What is the load capacity of the SL192311-XL?
The basic dynamic load rating C is 270 kN and the basic static load rating C0 is 250 kN; the fatigue load limit Cur is 48.5 kN.
What is the maximum speed of the SL192311-XL?
The limiting speed is 3,750 r/min and the thermal reference speed is 2,550 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 SL192311-XL?
This is a semi-locating bearing: it locates the shaft in one axial direction and floats in the other, and should be paired with a non-locating or locating bearing accordingly.
Reviewed & verified by the MPN Base engineering desk against source catalog HR1 2026-09-25 on 2026-09-30. Read our editorial & correction policy.