683-672 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 683-672 model number is decoded

Journal and housing interface: the 95.25 mm bore takes a k5 shaft seat (upper deviation ~0.191 mm for this diameter range) and the 168.275 mm outside diameter pairs with an H7 housing bore tolerance band of 168.275.000/168.295 mm; the 41.275 mm width defines the shoulder depth, and the 3750 g cone-plus-cup assembly is the dead load on the shaft during thermal expansion calculations. 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 683 the 683 cone contributes the 95.25 mm bore and roller set, the 672 cup contributes the 168.275 mm OD raceway, and the assembled 41.275 mm width is the catalogue value.683 is a single-row tapered roller bearing in the 675-series inch 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.Digit by digit, 683 reads as cone reference / cup reference in the 675-series inch series; the 95.25 mm bore, 168.275 mm OD and 41.275 mm width are the metric equivalents of the original inch boundary values. In SKF suffix language a bare 683 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Selection arithmetic: the C0/C ratio is about 1.27 (static 365 kN against dynamic 288 kN), typical of a tapered roller sized for axial capacity, and the 39 kN fatigue load limit Pu is the equivalent-load floor used in the life calculation. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 683 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 95.25 mm bore 683 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 675-series inch series at 95.25 mm bore (168.275×41.275 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 683 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• Do not mix brands or executions inside one 683 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.
• Open 683 units need application-supplied sealing and a defined EP lubricant supply; the roller-rib contact is the first to fail when the additive film breaks down.
• The 288/365 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 683 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 683/672 designation when purchasing and match the execution to the mounting arrangement.