47890-47820 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 47890-47820 model number is decoded

Dimensional interchange map: within the 47800 series at 92.075 mm bore, the 146.05 mm OD and 33.338 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 27.0 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 2100 g mass is the minimum—sealed or snap-ring executions add rotating weight above that catalogue baseline. Inch tapered bearings are matched sets, not mix-and-match components: 47890 pairs the 47890 cone with the 47820 cup under the 47800-series boundary plan, and although the same cone shows up against other cups in the catalogue, each pairing yields a distinct assembled width and a distinct rating row.SKF 47890/47820 belongs to the SKF single-row tapered roller range — the 92.075 mm bore entry in the inch 47800-series, dimensioned 146.05 mm OD and 33.338 mm wide.The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (47800-series) ties the pair to a specific boundary plan. Dimensions 92.075×146.05×33.338 mm are the converted metric envelope. 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. Catalogue mass 2100 g for the 92.075×146.05×33.338 mm open execution covers the pressed-steel cage and standard roller complement; sealed or special-clearance variants differ slightly in mass and carry their own order numbers. Fit selection follows the rotating ring — interference on a rotating cone — and two 47890 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 92.075 mm bore 47890 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 47800-series inch series at 92.075 mm bore (146.05×33.338 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
• Setting is a design value, not an assembly feel: excessive preload in the 47890 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• A single 47890 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.
• Catalogue reference speed and limiting speed are different limits: the 3,400 r/min reference is a thermal criterion under load, while the 4,300 r/min limiting value is the mechanical ceiling — observe both.
• The 209/280 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 47890 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 47890/47820 designation when purchasing and match the execution to the mounting arrangement.