53210 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 53210 model number is decoded

53210 is SKF's 50 mm-bore single-direction thrust ball bearing in the 53200 series to the ISO 104 dimension plan, with a sphered housing washer paired to a U seat washer, measuring 50×78×23.5 mm U 210 seat washer companion included in the mounted H1 dimension. The separable set comprises a shaft washer (ground bore, tight fit on the shaft), a loose-bore housing washer and one ball-cage assembly, reacting axial force in one direction and carrying no radial load. in the 53xxx designation the 3 marks a single-direction bearing whose housing washer has a sphered (convex) seating surface, intended to run against the matching U seat washer; the third digit 2–4 grades the section. the final two digits 10 encode the bore as 50 mm (code 10 × 5), the standard SKF bore-code rule shared with radial bearings. 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 50×78×23.5 mm (1.969×3.071×0.925 in), 14.0 mm radial section, C 49.4 kN, C0 116 kN, Pu 4.3 kN. Mounted height H1 26 mm includes the U 210 seat washer; the bearing alone is 23.5 mm high. reference speed 3,200 r/min (thermal) and limiting speed 4,500 r/min (mechanical), catalogue mass 470 g. Speed-ratio note for this exact unit: the reference speed is 3,200 r/min against a 4,500 r/min limiting speed, a reference-to-limit ratio of 0.71. Stack/annulus proportions: the 23.5 mm axial stack over the 2,815 mm² washer annulus gives 8.35 mm of height per annular square millimetre ×10⁻³, and at 470 g the bearing holds about 246.8 kN of C0 per kilogram. Capacity density: 49.4 kN C from 0.470 kg of bearing steel gives about 105.1 kN per kilogram; static density is correspondingly 246.8 kN/kg at C0 116 kN. Rating split for documentation: dynamic 49.4 kN (L10 life), static 116 kN (safety factor s0), fatigue limit 4.3 kN (adjusted life) — three different uses of three different numbers for 53210, none interchangeable with another. Selection figures for 53210: the C0/C ratio is 2.35, Pu 4.3 kN is about 9 % of C, and the catalogue mass works out to roughly 9 g per millimetre of bore; the printed minimum-load factor is A 0.069. Sphered-seating order-number note: the convex back face of the housing washer is finish-ground spherical and is delivered to mate with the separately ordered U seat washer, which presents a flat face to the housing and a concave face to the washer; together they accommodate initial static misalignment, but the pair must be kept clean, greased at the spherical interface and never replaced by a washer-on-flat-steel makeshift. The aligning angle is set by how far the sphered back of the 78 mm washer can tilt inside the U 210 seat; check the actual tilt allowance in the mounting drawing, since the 2.5 mm washer thickness step does not by itself quantify it.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The sphered housing washer of 53210 MUST run against the U 210 seat washer, a separate order number; mounted bare on a flat register, the convex back makes point contact that gouges the housing under load.
• Keep the sphered interface clean and lightly greased: scale, paint or grit between the washer back and U 210 locks the aligning function and frets under load; re-grease the contact at every overhaul.
• The spherical seat accommodates INITIAL static misalignment between shaft and housing; it is not a swivel for continuous oscillation, and the bearing still carries pure axial load with no radial capacity.
• The self-aligning feature is checked at commissioning by hand: with the shaft under no load the assembly must swivel and settle; a stiff spherical seat means dirt, a mismatched U washer, or a register bored off-axis.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 53210 as the single sphered pressed steel execution; other order numbers of the 53210 size are different products and may carry different ratings or seating geometry — always quote the full designation including the U 210 seat washer when purchasing.