539-532A bearing: complete specifications & equivalents
The 539-532A is a ISO 355 radial bearing sized 53.975 x 111.125 x 38.1 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 53.975 mm |
| Outer diameter D | 111.125 mm |
| Width B | 38.1 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 183 kN |
| Basic static load rating C0 | 190 kN |
| Fatigue load limit Pu | 21.6 kN |
| Reference speed (thermal) | 5300 rpm |
| Limiting speed (mechanical) | 6300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1650 g |
| Manufacturer designation | SKF 539/532 A |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 535-series range
| Bore d | 2.125 in |
|---|---|
| Outer diameter D | 4.375 in |
| Width B | 1.5 in |
| ISO bore code | 39 |
| Radial section height (D−d)/2 | 28.6 mm |
| Smallest bore in 535-series | 44.45 mm |
| Largest outer diameter in 535-series | 111.125 mm |
| Width range across 535-series | 36.512–38.1 mm |
| Bore position in 535-series (smallest first) | 3 of 3 |
| Bore above smallest 535-series size | 9.524999999999999 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 539-532X-NTN | NTN | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
| 539-532A | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
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 539-532A model number is decoded
The 21.6 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.04 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. For a 53.975 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two 539 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Dimensional interchange map: within the 53900 series at 53.975 mm bore, the 111.125 mm OD and 38.1 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 28.6 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 1650 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline. Cup-side note for 532 A: the outer ring's rib profile and the 111.125 mm outside diameter are cup-specific within the 535-series tables, so substituting a different cup against the same 539 cone changes both the assembled 38.1 mm width and the axial free-play setting of the mounted pair.The SKF 539/532 A is a 53.975×111.125×38.1 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.The 535-series series assigns 53.975 mm bore, 111.125 mm OD and 38.1 mm width to 539; the cone and cup references are not interchangeable with other inch-series pairs even when the bore matches, because the cup profile and rib geometry are series-specific. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers.
Typical equipment & failure modes
Common applications
- differential and pinion drives
- pump and compressor shafts
- machine-tool spindles
- industrial gearbox shafts and reducers
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- false brinelling on idle paired sets exposed to machine vibration
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- edge loading from shaft deflection or housing misalignment
Selection pitfalls — read before you substitute
- On this 53.975 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight 539 pair heats, loses setting control and smears the roller-rib contact.
- The 535-series inch series at 53.975 mm bore (111.125×38.1 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
- Setting is a design value, not an assembly feel: excessive preload in the 539 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- The tapered contact angle creates an induced axial load under pure radial force; include it in the 539 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
- The 539 shares its ISO 355 envelope with other tapered bearings of the same code but is not a drop-in replacement for a ball bearing: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
- The 183/190 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of 539 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 539/532 A designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Can a single 539 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
How does 539 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load 539 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
What shaft and housing fits suit 539?
For a rotating shaft under normal load, seat the cone on a k5 shaft fit; the cup is usually a loose-to-transition fit in the housing so it can creep slightly and distribute wear. Chamfer and shoulder diameters must clear the bearing rings so the 38.1 mm-wide cup seats square; the mounting setting (end play or preload) is set by the axial position of the cup relative to the cone.
Is 539 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
What are the dimensions and catalogue data of 539?
The SKF 539/532 A is a single-row tapered roller bearing with 53.975 mm bore, 111.125 mm outer diameter and 38.1 mm width (2.125 × 4.375 × 1.5 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 183 kN, C0 190 kN, fatigue load limit Pu 21.6 kN, reference speed 5,300 r/min, limiting speed 6,300 r/min, mass about 1650 g. It is an open, separable bearing with a pressed-steel cage.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.