SL182915-XL bearing: complete specifications & equivalents
The SL182915-XL is a ISO 15 radial bearing sized 75 x 105 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 | 75 mm |
| Outer diameter D | 105 mm |
| Width B | 19 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 91 kN |
| Basic static load rating C0 | 119 kN |
| Fatigue load limit Pu | 20.4 kN |
| Reference speed (thermal) | 2370 rpm |
| Limiting speed (mechanical) | 3700 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 520 g |
| Manufacturer designation | SL182915-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 & sl1829-series range
| Bore d | 2.953 in |
|---|---|
| Outer diameter D | 4.134 in |
| Width B | 0.748 in |
| ISO bore code | 15 |
| Radial section height (D−d)/2 | 15 mm |
| Smallest bore in sl1829-series | 60 mm |
| Largest outer diameter in sl1829-series | 670 mm |
| Width range across sl1829-series | 16–100 mm |
| Bore position in sl1829-series (smallest first) | 4 of 34 |
| Bore above smallest sl1829-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL182915 | 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 SL182915-XL model number is decoded
envelope 75×105×19 mm with a 15.0 mm radial section; every available circumferential space carries a roller because there is no cage C is 91 kN and C0 119 kN; with a C/C0 ratio of 0.76 the 19 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 20.4 kN, the limiting speed 3,700 r/min and the thermal reference speed 2,370 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 1.21 kN per millimetre of the 75 mm bore and 4.79 kN per millimetre of the 19 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 520 g (0.26 g per mm² of the 105×19 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads with a 75 mm bore this is a heavy-industrial bearing: 520 g of stiff ring and roller set, specified where rigidity matters more than speed 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 SL182915-XL is a single-row full-complement cylindrical roller bearing: no cage is fitted, so the maximum number of rollers runs between the rings, and the rollers guide themselves on the two inner-ring ribs The -XL suffix is the Schaeffler X-life mark: interchangeable envelope with the basic bearing, but higher load capacity and lower running temperature at the 3,700 r/min limit. Typical applications include material handling conveyor pulleys, rolling-mill and steel-industry drives and construction machinery slewing drives, where the 105 mm outside diameter and 91 kN dynamic rating match the duty. In material handling conveyor pulleys the unit fits a compact 75 mm seat, and in rolling-mill and steel-industry drives the 520 g mass suits the compact, space-optimised housing. Designers also specify it for construction machinery slewing drives, relying on the 19 mm width and the published 119 kN static rating. 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. 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
- rope drums and winch drums
- compact slow-speed agitator drives
- marine and offshore winch arrangements
- hydraulic pumps and radial piston pumps
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
- 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.
- 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 SL182915-XL?
The SL182915-XL is a SL1829 single-row full-complement semi-locating cylindrical roller bearing with 105 mm outside diameter, 75 mm bore and 19 mm width, envelope 75×105×19 mm. Mass is 520 g.
What does the SL182915-XL designation mean in the FAG/INA HR1 catalogue?
SL182915-XL identifies this SL1829 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 75×105×19 mm and the catalogue ratings are C 91 kN, C0 119 kN, Cur 20.4 kN.
What is the load capacity of the SL182915-XL?
The basic dynamic load rating C is 91 kN and the basic static load rating C0 is 119 kN; the fatigue load limit Cur is 20.4 kN.
What is the maximum speed of the SL182915-XL?
The limiting speed is 3,700 r/min and the thermal reference speed is 2,370 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 SL182915-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.