32008-SKF 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 32008-SKF model number is decoded

32008 is a single-row tapered roller bearing in the ISO 32000 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.Numbering ties the bearing to its envelope: 32008 means tapered-roller type 3, low-friction section series 20, 40 mm bore — which is why the 68×19 mm outline swaps dimensionally with other ISO 355 bearings of the same code. In SKF suffix language a bare 32008 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. The 14.0 mm radial section height ((68−40)/2) and 280 g catalogue mass frame a 40 mm bore bearing rated at 64.7 kN C — roughly 1.62 kN of dynamic capacity per millimetre of bore before application factors. Fit selection follows the rotating ring — interference on a rotating cone — and two 32008 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Cross-section geometry: the 14.0 mm half-section ((68−40)/2) of this 32000-series unit places the roller large-end pitch diameter at roughly 54 mm, and the 19 mm axial width is split between cone (10 mm) and cup rib (9 mm) — a geometry that sets the contact angle and, with the 280 g rotating cone mass, the critical speed at which cage-roller imbalance begins.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 40 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 32008 pair heats, loses setting control and smears the roller-rib contact.
• The 320 series at 40 mm bore (68×19 mm) is the low-friction, higher-speed section; it carries less thrust than a 30208 of the same bore, so verify the axial load share before swapping.
• A single 32008 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.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 32008 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
• The 64.7/71 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 32008 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 32008 X designation when purchasing and match the execution to the mounting arrangement.