32944 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 32944 model number is decoded

32944 is a single-row tapered roller bearing in the ISO 32900 dimension series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by SKF in SKF catalogue PUB BU/P1 17000.On the SKF nameplate, 32944 follows the ISO 355 convention: 3 for the tapered-roller type, 29 for the very-light thin section, final digits 44 for the 220 mm bore. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. 3EC); it is the dimensional series, not a separate part number. Catalogue mass 10000 g for the 220×300×51 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. Mounting practice for 32944: the rotating cone takes the interference fit (m6 on a 220 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Cross-section geometry: the 40.0 mm half-section ((300−220)/2) of this 32900-series unit places the roller large-end pitch diameter at roughly 260 mm, and the 51 mm axial width is split between cone (28 mm) and cup rib (23 mm) — a geometry that sets the contact angle and, with the 10000 g rotating cone mass, the critical speed at which cage-roller imbalance begins.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At 220 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 329 series at 220 mm bore (300×51 mm) is the very-light thin-section envelope: the smallest OD of any tapered family at this bore, ideal where radial space is severely limited, but capacity is well below a 30244 of the same bore — confirm the L10 life and minimum axial load before choosing it.
• A single 32944 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 32944 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• Catalogue reference speed and limiting speed are different limits: the 1,500 r/min reference is a thermal criterion under load, while the 1,900 r/min limiting value is the mechanical ceiling — observe both.
• The 601/1000 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 32944 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32944 designation when purchasing and match the execution to the mounting arrangement.