SL185016-XL bearing: complete specifications & equivalents
The SL185016-XL is a ISO 15 radial bearing sized 80 x 125 x 60 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 80 mm |
| Outer diameter D | 125 mm |
| Width B | 60 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 330 kN |
| Basic static load rating C0 | 440 kN |
| Fatigue load limit Pu | 83 kN |
| Reference speed (thermal) | 2320 rpm |
| Limiting speed (mechanical) | 3200 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 2590 g |
| Manufacturer designation | SL185016-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 & sl1850-series range
| Bore d | 3.15 in |
|---|---|
| Outer diameter D | 4.921 in |
| Width B | 2.362 in |
| ISO bore code | 16 |
| Radial section height (D−d)/2 | 22.5 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) | 13 of 35 |
| Bore above smallest sl1850-series size | 60 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| SL185016 | 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 SL185016-XL model number is decoded
envelope 80×125×60 mm with a 22.5 mm radial section; every available circumferential space carries a roller because there is no cage C is 330 kN and C0 440 kN; with a C/C0 ratio of 0.75 the 60 mm-wide full complement concentrates on extreme static and steady radial capacity rather than speed the fatigue load limit Cur is 83 kN, the limiting speed 3,200 r/min and the thermal reference speed 2,320 r/min — full-complement roller-to-roller contact keeps both speeds well below caged cylindrical bearings of the same size the dynamic rating is 4.13 kN per millimetre of the 80 mm bore and 5.50 kN per millimetre of the 60 mm width, figures that explain the use of this bearing in compact, heavily loaded gearbox positions mass is 2.59 kg (2590 g) (0.35 g per mm² of the 125×60 mm envelope); the stiff, thick rings keep raceway deformation low under peak loads the 80 mm bore belongs to the large band, where HR1 full-complement and track-roller designs deliver their highest kilonewton ratings in slow, heavily loaded machinery At 2.59 kg (2590 g), this is a rigid machine element used in rolling stands, crane wheels, winches and planetary stages with tight envelope constraints As an X-life (-XL) bearing it benefits from the optimised surface finish that reduces friction and raises the fatigue strength behind the 83 kN Cur value. Typical applications include heavy industrial gearbox shafts, crane travelling-wheel mechanisms and vibrating and oscillating machinery, where the 125 mm outside diameter and 330 kN dynamic rating match the duty. In heavy industrial gearbox shafts the unit fits a compact 80 mm seat, and in crane travelling-wheel mechanisms the 2.59 kg mass is part of the rotor inertia calculation. Designers also specify it for vibrating and oscillating machinery, relying on the 60 mm width and the published 440 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. Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.
Typical equipment & failure modes
Common applications
- rolling-mill and steel-industry drives
- vibrating and oscillating machinery
- material handling conveyor pulleys
- construction machinery slewing drives
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.
- Relubrication paths matter: specify the annular groove/hole executions where access is poor, because the tightly packed rows trap old grease.
- 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.
Frequently asked questions
What are the dimensions of the SL185016-XL?
The SL185016-XL is a SL1850 double-row full-complement semi-locating cylindrical roller bearing with 125 mm outside diameter, 80 mm bore and 60 mm width, envelope 80×125×60 mm. Mass is 2.59 kg.
What does the SL185016-XL designation mean in the FAG/INA HR1 catalogue?
SL185016-XL identifies this SL1850 double-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 80×125×60 mm and the catalogue ratings are C 330 kN, C0 440 kN, Cur 83 kN.
What is the load capacity of the SL185016-XL?
The basic dynamic load rating C is 330 kN and the basic static load rating C0 is 440 kN; the fatigue load limit Cur is 83 kN.
What is the maximum speed of the SL185016-XL?
The limiting speed is 3,200 r/min and the thermal reference speed is 2,320 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 SL185016-XL?
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.