395-394A 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 395-394A model number is decoded

The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. ); it is the dimensional series, not a separate part number. Catalogue mass 840 g for the 63.5×110×22 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. For a 63.5 mm shaft the usual cone seat is k5 with an H7 housing when the inner ring rotates; arrange two 395 bearings as a set for two-direction location and set clearance from the load diagram, never from assembly feel. Speed envelope and thermal behaviour: at 4,800 r/min thermal reference, the 63.5 mm bore shaft runs at a dn of 305k, and the 23.3 mm section dissipates heat through the cup-to-housing contact path; the 6,000 r/min mechanical ceiling reflects cage strength, and the 840 g spinning cone contributes gyroscopic moment under rapid speed reversal. Inch tapered bearings are matched sets, not mix-and-match components: 395 pairs the 395 cone with the 394 A cup under the 395-series boundary plan, and although the same cone shows up against other cups in the catalogue, each pairing yields a distinct assembled width and a distinct rating row.The SKF 395/394 A is a 63.5×110×22 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.Digit by digit, 395 reads as cone reference / cup reference in the 395-series inch series; the 63.5 mm bore, 110 mm OD and 22 mm width are the metric equivalents of the original inch boundary values.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 63.5 mm bore 395 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 (110×22 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.
• A single 395 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 395 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• Shaft and housing fillets must clear the bearing chamfer so the 22 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 108/118 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 395 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 395/394 A designation when purchasing and match the execution to the mounting arrangement.