32934 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.1 metric 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. 8.1 metric 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 32934 model number is decoded

For a 170 mm shaft carrying combined load, SKF lists 32934 under catalogue execution SKF 32934: one open single-row tapered roller bearing in the very-light thin section of the 32900 family.Digit by digit, 32934 reads as bearing type 3 (single-row tapered roller), very-light thin section series 29, and bore reference 34 resolving to 170 mm; 230 mm OD and 38 mm width are the matching ISO 355 boundary values. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. 3DC); it is the dimensional series, not a separate part number. With C 351 kN and C0 585 kN, the 32934 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 2,400 r/min. Fit selection follows the rotating ring — interference on a rotating cone — and two 32934 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 2,000 r/min thermal reference, the 170 mm bore shaft runs at a dn of 340k, and the 30.0 mm section dissipates heat through the cup-to-housing contact path; the 2,400 r/min mechanical ceiling reflects cage strength, and the 4500 g spinning cone contributes gyroscopic moment under rapid speed reversal.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 170 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
• The 329 series at 170 mm bore (230×38 mm) is the very-light thin-section envelope: the smallest OD of any tapered family at this bore, ideal where radial space is severely limited, but capacity is well below a 30234 of the same bore — confirm the L10 life and minimum axial load before choosing it.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 32934 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• 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 32934 mounting error.
• 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 230 mm cup race release as noise within the first running hours.
• The 351/585 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 32934 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32934 designation when purchasing and match the execution to the mounting arrangement.