53220 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 53220 model number is decoded

The 53200 series order number 53220 is a SKF single-direction thrust ball bearing for a 100 mm seat, built to ISO 104, with a sphered housing washer paired to a U seat washer, 100×150×40.9 mm boundary dimensions. Three separable parts make the set: the tight-bore shaft washer that locates on the shaft, the loose-bore housing washer in its register, and the ball-cage assembly; load is purely axial and acts in one direction. the 3 in 53xxx replaces the flat-seat 1: it still denotes one load direction, but the housing washer is sphered for pairing with a U seat washer, and the following digit 2–4 ranks the section. bore code 20 decodes to 100 mm (code 20 × 5) under the same 00/01/02/03-exception, ×5 rule SKF uses across its coded bearing ranges. the suffix-free listing carries the catalogue default: a pressed (stamped sheet-steel) ball-cage assembly, light and quiet, used across the small and medium sizes. Envelope 100×150×40.9 mm (3.937×5.906×1.61 in), 25.0 mm radial section, C 119 kN, C0 325 kN, Pu 10.8 kN. Mounted height H1 45 mm includes the U 220 seat washer; the bearing alone is 40.9 mm high. reference speed 1,700 r/min (thermal) and limiting speed 2,400 r/min (mechanical), catalogue mass 2700 g. Stack/annulus proportions: the 40.9 mm axial stack over the 9,817 mm² washer annulus gives 4.17 mm of height per annular square millimetre ×10⁻³, and at 2700 g the bearing holds about 120.4 kN of C0 per kilogram. Speed-ratio note for this exact unit: the reference speed is 1,700 r/min against a 2,400 r/min limiting speed, a reference-to-limit ratio of 0.71. Load balance: C0 325 kN against C 119 kN gives a 2.73 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 10.8 kN enters the adjusted-life check. Washer-stack proportions: the U 220 seat washer adds 4.1 mm to the 40.9 mm bearing height for a mounted H1 of 45 mm, while the 25.0 mm radial section against 100 mm bore (section/bore ≈ 0.25) identifies the envelope. Speed band width for this size is 700 r/min between reference and limiting (1.41× ratio); lubrication, preload and heat removal decide where inside that band 53220 can actually run. 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 150 mm washer can tilt inside the U 220 seat; check the actual tilt allowance in the mounting drawing, since the 4.1 mm washer thickness step does not by itself quantify it.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The shaft washer remains the tight, ground-bore component on the 100 mm shaft; the sphered part is the HOUSING washer, and the U seat washer is the loose flat-backed part — the fitting order is shaft washer and cage set first, then housing washer and U 220 into the register.
• Minimum axial load still applies with factor A 0.62: a self-aligning seat does not prevent ball skidding, so provide spring preload or sufficient rotor weight at light load and speed.
• Dimension the housing to the 45 mm mounted height H1 (bearing plus U 220), not the 40.9 mm bearing height H — confusing the two is a recurring drawing error for the 53-series.
• The sphered housing washer of 53220 MUST run against the U 220 seat washer, a separate order number; mounted bare on a flat register, the convex back makes point contact that gouges the housing under load.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 53220 as the single sphered pressed steel execution; other order numbers of the 53220 size are different products and may carry different ratings or seating geometry — always quote the full designation including the U 220 seat washer when purchasing.