23156 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.1 spherical roller bearings); 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 23156 model number is decoded

SKF 23156 (23156 CC/W33) is the spherical-roller choice for a 280 mm shaft — barrel rollers between an inner ring with two raceways and a common sphered outer raceway inside the 460×146 mm ISO 15 envelope. Reading the designation: the leading 2 marks a spherical roller bearing, the 31 is the ISO 15 dimension series (dimension series 31 (medium OD, wide)), and the last two digits encode the 280 mm bore; the 460 mm OD and 146 mm width follow the ISO 15 general plan. In SKF suffix language, E marks the optimized high-capacity design and CC/W33 the pressed-steel-cage execution with relubrication groove; both are open bearings — the sealed variant carries the 2CS5 suffix and the vibrating-screen execution VA405. At 1,000 r/min reference speed the 90.0 mm-section 23156 is governed thermally by lubricant flow through the W33 groove and the two-row roller complement; grease or oil selection should be made against that value, with 1,300 r/min as the mechanical ceiling. Drive-on force must go through the ring being fitted: press or induction-heat the inner ring onto the 280 mm shaft (max 120 °C) and never transmit mounting force through the roller complement, or the raceways brinell.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 280 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.
• The 23100-series series at 280 mm bore (460×146 mm) is the medium-OD wide envelope for heavy continuous duty; it is wider than a 222 bearing in the same OD class, so housing width and spacer stack must be re-checked before substitution.
• The 23156 shares its ISO 15 envelope across brands, but internal geometry differs — SKF load ratings in this row are 2784/4250 kN; another maker's same-size bearing may rate higher or lower, so do not interchange on envelope alone.
• The self-aligning feature is not a license to ignore alignment: beyond ≈ 0.5–2.5° (series-dependent) the edge loading eats the fatigue margin, and seal drag grows as the rings tilt.
• The 2784/4250 kN ratings are SKF catalogue values for this exact execution (23156 CC/W33); SKF can revise internal geometry without changing the order number, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the specification and re-verify for critical drives.
• SKF lists several executions of 23156 (cylindrical bore as listed, tapered-bore 23156 CCK/W33 variant, plus sealed and vibrating-screen options in the same envelope); they are not interchangeable order numbers — quote the full 23156 CC/W33 designation when purchasing.