39585-39520 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 39585-39520 model number is decoded

Two catalogue entries share the 39585 cone but use different cups; this one, 39585, takes the 39520 cup and is ground for the resulting 112.712 mm OD / 30.162 mm width envelope. Selecting a sibling cup produces a different boundary plan and a different order number, so the full designation is required at purchase.In SKF catalogue PUB BU/P1 17000, 39585 appears as SKF 39585/39520: an open, single-row tapered roller bearing in the 39500-series, supplied with a pressed-steel cage as standard.Reading the designation: 39585 follows the Timken-style inch convention — the cone (inner ring with rollers) and cup (outer ring) are quoted as a pair separated by a slash, and the 39500-series code identifies the dimensional series. The 63.5 mm bore, 112.712 mm OD and 30.162 mm width are the metric equivalents of the inch boundary dimensions. In SKF suffix language a bare 39585 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. With C 175 kN and C0 204 kN, the 39585 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 5,600 r/min. Because the contact line is tapered, one 39585 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 63.5 mm shaft typically takes a k5 seat with an H7 housing bore. Journal and housing interface: the 63.5 mm bore takes a k5 shaft seat (upper deviation ~0.127 mm for this diameter range) and the 112.712 mm outside diameter pairs with an H7 housing bore tolerance band of 112.712.000/112.732 mm; the 30.162 mm width defines the shoulder depth, and the 1250 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 63.5 mm bore 39585 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 320 series at 63.5 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 39585, 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.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 39585 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• 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 39585 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 39585/39520 designation when purchasing and match the execution to the mounting arrangement.