359S-354X 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 359S-354X model number is decoded

Specify pairs rather than single units wherever thrust reverses: the tapered contact of 359S generates an induced axial load under radial force, and an unpaired bearing on a reversing shaft will run slack and fret its seat. Cross-section geometry: the 19.5 mm half-section ((85−46.038)/2) of this 35900-series unit places the roller large-end pitch diameter at roughly 65 mm, and the 20.638 mm axial width is split between cone (11 mm) and cup rib (9 mm) — a geometry that sets the contact angle and, with the 490 g rotating cone mass, the critical speed at which cage-roller imbalance begins. From a specification standpoint the 354 X cup is the controlling half of 359S for housing design — it sets the 85 mm OD and the outer abutment diameter — while the 359 S cone controls shaft fit at the 46.038 mm bore; the 20.638 mm width is the result of the two together.359S is a single-row tapered roller bearing in the 355-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.Numbering ties the bearing to its inch-series envelope: 359S means a cone and cup matched pair in the 355-series series — which is why the 46.038×85×20.638 mm outline swaps dimensionally with other inch-series bearings of the same code. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers. Catalogue mass 490 g for the 46.038×85×20.638 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.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 46.038 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 359S pair heats, loses setting control and smears the roller-rib contact.
• The 320 series at 46.038 mm bore (85×20.638 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.
• Setting is a design value, not an assembly feel: excessive preload in the 359S pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
• A single 359S 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.
• Shaft and housing fillets must clear the bearing chamfer so the 20.638 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 87.3/81.5 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 359S (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 359 S/354 X designation when purchasing and match the execution to the mounting arrangement.