23690-23620 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 23690-23620 model number is decoded

Numbering ties the bearing to its inch-series envelope: 23690 means a cone and cup matched pair in the 23600-series series — which is why the 34.925×73.025×26.988 mm outline swaps dimensionally with other inch-series bearings of the same code. In SKF suffix language a bare 23690 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. The 10.4 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 0.98 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 23690 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Operating context for the 34.925 mm bore: a shaft of this diameter in the medium-bore band typically runs between 27940 and 41910 r/min in real machinery, and the 73.025 mm outside diameter places the housing shoulder at 81 mm outer abutment; the 26.988 mm width and 530 g mass together set the shaft critical speed and the housing resonance check for this 23600-series envelope. Inch tapered bearings are matched sets, not mix-and-match components: 23690 pairs the 23690 cone with the 23620 cup under the 23600-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.SKF 23690/23620 belongs to the SKF single-row tapered roller range — the 34.925 mm bore entry in the inch 23600-series, dimensioned 73.025 mm OD and 26.988 mm wide.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 34.925 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 23690 pair heats, loses setting control and smears the roller-rib contact.
• The 23600-series inch series at 34.925 mm bore (73.025×26.988 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 94.6 kN rating of 23690, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 9,500 r/min speed end and heavier preload only where moment stiffness dominates.
• At the 94.6 kN rating of 23690, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 9,500 r/min speed end and heavier preload only where moment stiffness dominates.
• Open 23690 units need application-supplied sealing and a defined EP lubricant supply; the roller-rib contact is the first to fail when the additive film breaks down.
• The 94.6/93 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 23690 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 23690/23620 designation when purchasing and match the execution to the mounting arrangement.