54307 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 54307 model number is decoded

54307 is SKF's 30 mm-bore double-direction thrust ball bearing in the 54300 series to the ISO 104 dimension plan, with a sphered housing washer paired to a U seat washer, measuring 30×68×47.2 mm U 307 seat washer companion included in the mounted H1 dimension. The unit stacks one central shaft washer (ground bore, tight on the shaft), two outward-facing housing washers and two ball-cage assemblies, reacting axial force in both directions. double-direction 52/54 numbering does NOT decode the bore by the usual single-direction ×5 code — read the 30 mm bore from the dimension table; codes recur across the 522/523/524 sections and systematically trail the 51/53 code values. with no cage suffix this is the standard execution with a stamped sheet-steel ball-cage assembly (pressed cage) — the light, quiet and economical cage for small and medium thrust-ball sizes. Envelope 30×68×47.2 mm (1.181×2.677×1.858 in), 19.0 mm radial section, C 49.4 kN, C0 96.5 kN, Pu 3.55 kN. Mounted height H1 52 mm includes the U 307 seat washer; the bearing alone is 47.2 mm high. reference speed 2,400 r/min (thermal) and limiting speed 3,400 r/min (mechanical), catalogue mass 850 g. Imperial cross-check for procurement drawings: 1.181 in bore, 2.677 in OD, 1.858 in height, and the 850 g catalogue mass converts to 0.850 kg (30.0 oz). Washer-stack proportions: the U 307 seat washer adds 4.8 mm to the 47.2 mm bearing height for a mounted H1 of 52 mm, while the 19.0 mm radial section against 30 mm bore (section/bore ≈ 0.63) identifies the envelope. Bore-to-OD planning: OD 68 over bore 30 is a 2.27× step for this size, and the 47.2 mm height gives a bore/height ratio of 0.64; use these ratios when the housing recess around the 30 mm shaft is the first constraint. Capacity density: 49.4 kN C from 0.850 kg of bearing steel gives about 58.1 kN per kilogram; static density is correspondingly 113.5 kN/kg at C0 96.5 kN. Speed band width for this size is 1,000 r/min between reference and limiting (1.42× ratio); lubrication, preload and heat removal decide where inside that band 54307 can actually run. 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 54307 plus TWO × U 307; the 52 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

• Order TWO seat washers for 54307 — the designation U 307 pairs with one side and a second U washer (same number) with the other; the catalogue 52 mm H1 includes both.
• 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 96.5 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.
• Minimum load factor A 0.048 applies to both load directions, and both brass pressed cage sets need lubricant reaching the upper track on a vertical shaft.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 54307 as the double sphered pressed steel execution; other order numbers of the 54307 size are different products and may carry different ratings or seating geometry — always quote the full designation including the U 307 seat washer when purchasing.