33895-33821 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 33895-33821 model number is decoded

A single-row inch tapered bearing is quoted as a cone/cup pair because the boundary dimensions belong to the combination, not to either half alone: in 33895 the 33895 cone contributes the 53.975 mm bore and roller set, the 33821 cup contributes the 95.25 mm OD raceway, and the assembled 27.783 mm width is the catalogue value.In SKF catalogue PUB BU/P1 17000, 33895 appears as SKF 33895/33821: an open, single-row tapered roller bearing in the 33800-series, supplied with a pressed-steel cage as standard.On the SKF nameplate, 33895 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 33800-series marking the dimensional series. In SKF suffix language a bare 33895 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. With C 129 kN and C0 137 kN, the 33895 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 7,000 r/min. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 33895 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Dimensional interchange map: within the 33800 series at 53.975 mm bore, the 95.25 mm OD and 27.783 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 20.6 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 810 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 53.975 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 33895 pair heats, loses setting control and smears the roller-rib contact.
• The 320 series at 53.975 mm bore (95.25×27.783 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.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 33895 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 33895 mounting error.
• The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
• The 129/137 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 33895 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 33895/33821 designation when purchasing and match the execution to the mounting arrangement.