53228 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 53228 model number is decoded

Listed in SKF 17000 chapter 5, 53228 is an ISO 104 single-direction thrust ball bearing, 140 mm bore and 200 mm OD, with a sphered housing washer and U seat washer, standing 48.6 mm high before installation. The bearing is delivered as separate, interchangeable parts: a ground-bore shaft washer, a loose-bore housing washer and the ball-cage assembly between them, designed for one axial load direction only. 53xxx reads as 5 (thrust ball), 3 (single direction with a sphered housing washer), a 2–4 section digit and the bore code; the U seat washer companion carries the matching three-digit number. reading the ending 28: bore 140 mm (code 28 × 5) for this single-direction size, via the standard exceptions 00/01/02/03 and ×5 above them. 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 140×200×48.6 mm (5.512×7.874×1.913 in), 30.0 mm radial section, C 190 kN, C0 620 kN, Pu 17.6 kN. Mounted height H1 55 mm includes the U 228 seat washer; the bearing alone is 48.6 mm high. reference speed 1,300 r/min (thermal) and limiting speed 1,800 r/min (mechanical), catalogue mass 5450 g. Minimum-load arithmetic: with dm ≈ 170.0 mm and factor A 2, Fam ≈ A·(n·dm/1000)² at the 1,300 r/min reference speed is about 97.7 kN for 53228; below that preload the balls skid and smear the tracks. Washer-annulus check: the π/4·(D²−d²) contact annulus of 53228 covers about 16,022 mm², distributing C0 620 kN over a mean track circle of π·dm ≈ 534 mm. Mass and section check: 5450 g inside the 140×200×48.6 mm outline leaves a 30.0 mm radial section, and the 620 kN static rating is 3.26× the dynamic rating — plan static safety and minimum preload against those figures. Sizing arithmetic on the 140 mm bore: 190 kN C over the 30.0 mm radial section gives 6.3 kN per section millimetre, and the 48.6 mm stack height is 1.62× that section — proportions typical of a 53200 thrust section. Washer-stack proportions: the U 228 seat washer adds 6.4 mm to the 48.6 mm bearing height for a mounted H1 of 55 mm, while the 30.0 mm radial section against 140 mm bore (section/bore ≈ 0.21) identifies the envelope. 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 200 mm washer can tilt inside the U 228 seat; check the actual tilt allowance in the mounting drawing, since the 6.4 mm washer thickness step does not by itself quantify it.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Keep the sphered interface clean and lightly greased: scale, paint or grit between the washer back and U 228 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.
• Dimension the housing to the 55 mm mounted height H1 (bearing plus U 228), not the 48.6 mm bearing height H — confusing the two is a recurring drawing error for the 53-series.
• Minimum axial load still applies with factor A 2: a self-aligning seat does not prevent ball skidding, so provide spring preload or sufficient rotor weight at light load and speed.
• Catalogue ratings are SKF PUB BU/P1 17000 figures for 53228 as the single sphered pressed steel execution; other order numbers of the 53228 size are different products and may carry different ratings or seating geometry — always quote the full designation including the U 228 seat washer when purchasing.