32040 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 2026-09-28

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 32040 model number is decoded

For a 200 mm shaft carrying combined load, SKF lists 32040 under catalogue execution SKF 32040 X: one open single-row tapered roller bearing in the low-friction section of the 32000 family.Numbering ties the bearing to its envelope: 32040 means tapered-roller type 3, low-friction section series 20, 200 mm bore — which is why the 310×70 mm outline swaps dimensionally with other ISO 355 bearings of the same code. In SKF suffix language a bare 32040 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Catalogue mass 19000 g for the 200×310×70 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. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 32040 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 32000 series at 200 mm bore, the 310 mm OD and 70 mm width are fixed by the ISO 355 plan, so any same-code bearing from another brand shares the mounting envelope; the 55.0 mm section height distinguishes this family from a 302 or 322 of the same bore, and the 19000 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

• At 200 mm bore the cone mass is high enough that cocking during mounting damages the cage and rib; guide the ring square, confirm seat contact around the full circumference, and re-check setting after the first thermal cycle of the paired set.
• The 320 series at 200 mm bore (310×70 mm) is the low-friction, higher-speed section; it carries less thrust than a 30240 of the same bore, so verify the axial load share before swapping.
• A single 32040 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.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 32040 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• The 32040 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 800/1370 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 32040 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32040 X designation when purchasing and match the execution to the mounting arrangement.