37425-37625 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 37425-37625 model number is decoded

Speed planning uses two different ceilings: 3,200 r/min thermal reference and 3,800 r/min mechanical limiting speed. Fit selection follows the rotating ring — interference on a rotating cone — and two 37425 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Speed envelope and thermal behaviour: at 3,200 r/min thermal reference, the 107.95 mm bore shaft runs at a dn of 345k, and the 25.4 mm section dissipates heat through the cup-to-housing contact path; the 3,800 r/min mechanical ceiling reflects cage strength, and the 1400 g spinning cone contributes gyroscopic moment under rapid speed reversal. Why the cup reference matters here: in the 37000-series tables the 37425 cone appears against several cup options. 37425 is the pairing with 37625, and that choice — not the cone — fixes the 158.75 mm OD, the raceway track position and the 23.02 mm assembled width.For a 107.95 mm shaft carrying combined load, SKF lists 37425 under catalogue execution SKF 37425/37625: one open single-row tapered roller bearing in the inch 37000-series.On the SKF nameplate, 37425 denotes a matched cone-and-cup pair: the designation is not a single number but a cone reference and cup reference joined by a slash, with the 37000-series marking the dimensional series. 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 107.95 mm bore 37425 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 320 series at 107.95 mm bore (158.75×23.02 mm) is the low-friction, higher-speed section; it carries less thrust than a 302 of the same bore, so verify the axial load share before swapping.
• A single 37425 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.
• O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common 37425 mounting error.
• The 37425 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 124/163 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 37425 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 37425/37625 designation when purchasing and match the execution to the mounting arrangement.