54209 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); 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 54209 model number is decoded

Listed in SKF 17000 chapter 5, 54209 is an ISO 104 double-direction thrust ball bearing, 35 mm bore and 73 mm OD, with a sphered housing washer and U seat washer, standing 39.6 mm high before installation. Construction is a five-component stack: one central shaft washer with tracks on both faces, two outward-facing housing washers and two cage sets, which lets one housing recess accept thrust from either direction. note the bore of 54209 is 35 mm by the dimension table: the double-direction series was deliberately aligned to the 51/53 washer sets with shifted codes, so the familiar 04=20 arithmetic does not apply here. no cage suffix means the standard stamped steel retainer — a pressed sheet-metal ball-cage assembly that covers the bulk of the thrust-ball assortment. Envelope 35×73×39.6 mm (1.378×2.874×1.559 in), 19.0 mm radial section, C 39 kN, C0 86.5 kN, Pu 3.2 kN. Mounted height H1 45 mm includes the U 209 seat washer; the bearing alone is 39.6 mm high. reference speed 2,600 r/min (thermal) and limiting speed 3,600 r/min (mechanical), catalogue mass 780 g. Capacity density: 39 kN C from 0.780 kg of bearing steel gives about 50.0 kN per kilogram; static density is correspondingly 110.9 kN/kg at C0 86.5 kN. Mass and section check: 780 g inside the 35×73×39.6 mm outline leaves a 19.0 mm radial section, and the 86.5 kN static rating is 2.22× the dynamic rating — plan static safety and minimum preload against those figures. Track-circle loading: per millimetre of mean track circumference the 39 kN dynamic rating corresponds to roughly 0.23 kN/mm of π·dm track, a useful comparison against the other dimension series of the 35 mm bore. Rating split for documentation: dynamic 39 kN (L10 life), static 86.5 kN (safety factor s0), fatigue limit 3.2 kN (adjusted life) — three different uses of three different numbers for 54209, none interchangeable with another. Minimum-load arithmetic: with dm ≈ 54.0 mm and factor A 0.038, Fam ≈ A·(n·dm/1000)² at the 2,600 r/min reference speed is about 749 N for 54209; below that preload the balls skid and smear the tracks. Bidirectional self-aligning note: TWO U seat washers are required for this order number, one behind each housing washer, and the catalogue H1 height includes them on both sides of the stack; the spherical interfaces accept initial misalignment in either load direction but are not pivots for continuous oscillation. Bill of materials for this page is 54209 plus TWO × U 209; the 45 mm H1 stack sits in a housing whose two register faces should be machined in one clamping to keep both spherical axes coincident.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The two spherical interfaces accommodate initial misalignment in either load direction but must stay clean, greased and static — continuous rocking frets the sphered contacts of even the 86.5 kN static-rated set.
• Assembly is a five-component stack (central shaft washer, two cage sets, two sphered housing washers) plus the two U seat washers in the housing registers; dry-build the arrangement by hand first to confirm both sides swivel freely.
• Order TWO seat washers for 54209 — the designation U 209 pairs with one side and a second U washer (same number) with the other; the catalogue 45 mm H1 includes both.
• Minimum load factor A 0.038 applies to both load directions, and both brass pressed cage sets need lubricant reaching the upper track on a vertical shaft.
• The 39/86.5 kN figures belong to 54209 specifically (the double sphered pressed steel execution of 54209); suffixed, sphered and counterpart-series order numbers are separate articles, and U 209 is ordered separately, so write the complete designation on the order and the maintenance record.