33210 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 2026-09-26

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 33210 model number is decoded

For a 50 mm shaft carrying combined load, SKF lists 33210 under catalogue execution SKF 33210: one open single-row tapered roller bearing in the medium wide section of the 33200 family.Numbering ties the bearing to its envelope: 33210 means tapered-roller type 3, medium wide section series 32, 50 mm bore — which is why the 90×32 mm outline swaps dimensionally with other ISO 355 bearings of the same code. In SKF suffix language a bare 33210 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. The 18.3 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.13 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 33210 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 50 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 33210 pair heats, loses setting control and smears the roller-rib contact.
• The 332 series at 50 mm bore (90×32 mm) is the wide medium-section choice — more capacity than 30210 in the same OD class but a wider footprint; re-check housing width and pair setting before substituting.
• Setting is a design value, not an assembly feel: excessive preload in the 33210 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 33210 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• The 33210 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 142/160 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 33210 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 33210 designation when purchasing and match the execution to the mounting arrangement.