39580-39520 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 39580-39520 model number is decoded

Numbering ties the bearing to its inch-series envelope: 39580 means a cone and cup matched pair in the 39500-series series — which is why the 53.975×112.712×30.162 mm outline swaps dimensionally with other inch-series bearings of the same code. 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 1400 g for the 53.975×112.712×30.162 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. Specify pairs rather than single units wherever thrust reverses: the tapered contact of 39580 generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Operating context for the 53.975 mm bore: a shaft of this diameter in the medium-bore band typically runs between 43180 and 64770 r/min in real machinery, and the 112.712 mm outside diameter places the housing shoulder at 121 mm outer abutment; the 30.162 mm width and 1400 g mass together set the shaft critical speed and the housing resonance check for this 39500-series envelope. 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 39580 the 39580 cone contributes the 53.975 mm bore and roller set, the 39520 cup contributes the 112.712 mm OD raceway, and the assembled 30.162 mm width is the catalogue value.Ordering number SKF 39580/39520 in SKF catalogue PUB BU/P1 17000 denotes a single-row tapered roller bearing for a 53.975 mm shaft, inch series, with an open pressed-steel-cage execution and one-direction axial capacity.

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 39580 pair heats, loses setting control and smears the roller-rib contact.
• The 320 series at 53.975 mm bore (112.712×30.162 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.
• At the 175 kN rating of 39580, preload class changes stiffness by tens of percent but also heat generation; select light preload for the 5,600 r/min speed end and heavier preload only where moment stiffness dominates.
• Do not mix brands or executions inside one 39580 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
• 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 112.712 mm cup race release as noise within the first running hours.
• The 175/204 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 39580 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 39580/39520 designation when purchasing and match the execution to the mounting arrangement.