11590-11520 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 11590-11520 model number is decoded

The cup reference 11520 is structural, not a suffix: it identifies the outer ring that, combined with the 11590 cone, produces the 15.875/42.862/14.288 mm envelope catalogue-listed as 11590. Quote the cup number in full when ordering — the 11500-series tables contain other cups that fit the same cone but change the bearing.In SKF catalogue PUB BU/P1 17000, 11590 appears as SKF 11590/11520: an open, single-row tapered roller bearing in the 11500-series, supplied with a pressed-steel cage as standard.Reading the designation: 11590 follows the Timken-style inch convention — the cone (inner ring with rollers) and cup (outer ring) are quoted as a pair separated by a slash, and the 11500-series code identifies the dimensional series. The 15.875 mm bore, 42.862 mm OD and 14.288 mm width are the metric equivalents of the inch boundary dimensions. In SKF suffix language a bare 11590 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. With C 21.5 kN and C0 17.6 kN, the 11590 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 17,000 r/min. Because the contact line is tapered, one 11590 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 15.875 mm shaft typically takes a j5 seat with an H7 housing bore. Speed envelope and thermal behaviour: at 13,000 r/min thermal reference, the 15.875 mm bore shaft runs at a dn of 206k, and the 13.5 mm section dissipates heat through the cup-to-housing contact path; the 17,000 r/min mechanical ceiling reflects cage strength, and the 100 g spinning cone contributes gyroscopic moment under rapid speed reversal.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At a 15.875 mm bore the thin cone and cup are easily distorted by an over-tight shaft nut; check seat runout (target Ra ≤ 0.8 µm) and torque the locknut progressively — a pinched 11590 shows up as gearbox vibration long before it fails.
• The 11500-series inch series at 15.875 mm bore (42.862×14.288 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.
• At the 21.5 kN rating of 11590, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 17,000 r/min speed end and heavier preload only where moment stiffness dominates.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 11590 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• Never press both rings through the wrong element during fitting: force for an interference shaft seat goes through the cone only, or brinell marks on the 42.862 mm cup race release as noise within the first running hours.
• The 21.5/17.6 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 11590 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 11590/11520 designation when purchasing and match the execution to the mounting arrangement.