593-592A bearing: complete specifications & equivalents

Specification table

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.

Cross references & equivalents

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 593-592A model number is decoded

In SKF inch-series tables 593 sits at 88.9 mm bore (3.5 in) with a 152.4 mm cup OD and 39.688 mm total width — dimensions that trace back to the original Timken boundary plan for the 593-series family. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. ); it is the dimensional series, not a separate part number. The 31.8 mm radial section height ((152.4−88.9)/2) and 2800 g catalogue mass frame a 88.9 mm bore bearing rated at 237 kN C — roughly 2.67 kN of dynamic capacity per millimetre of bore before application factors. Specify pairs rather than single units wherever thrust reverses: the tapered contact of 593 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Speed envelope and thermal behaviour: at 3,400 r/min thermal reference, the 88.9 mm bore shaft runs at a dn of 302k, and the 31.8 mm section dissipates heat through the cup-to-housing contact path; the 4,300 r/min mechanical ceiling reflects cage strength, and the 2800 g spinning cone contributes gyroscopic moment under rapid speed reversal. Inch tapered bearings are matched sets, not mix-and-match components: 593 pairs the 593 cone with the 592 A cup under the 593-series boundary plan, and although the same cone shows up against other cups in the catalogue, each pairing yields a distinct assembled width and a distinct rating row.For a 88.9 mm shaft carrying combined load, SKF lists 593 under catalogue execution SKF 593/592 A: one open single-row tapered roller bearing in the inch 593-series.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 88.9 mm bore 593 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
• The 593-series inch series at 88.9 mm bore (152.4×39.688 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.
• A single 593 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use an O or X matched pair for bidirectional location.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 593 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• Shaft and housing fillets must clear the bearing chamfer so the 39.688 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 237/305 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 593 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 593/592 A designation when purchasing and match the execution to the mounting arrangement.