53213 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 53213 model number is decoded

Listed in SKF 17000 chapter 5, 53213 is an ISO 104 single-direction thrust ball bearing, 65 mm bore and 100 mm OD, with a sphered housing washer and U seat washer, standing 28.7 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 13: bore 65 mm (code 13 × 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 65×100×28.7 mm (2.559×3.937×1.13 in), 17.5 mm radial section, C 60.5 kN, C0 150 kN, Pu 5.5 kN. Mounted height H1 32 mm includes the U 213 seat washer; the bearing alone is 28.7 mm high. reference speed 2,600 r/min (thermal) and limiting speed 3,600 r/min (mechanical), catalogue mass 910 g. Minimum-load arithmetic: with dm ≈ 82.5 mm and factor A 0.14, Fam ≈ A·(n·dm/1000)² at the 2,600 r/min reference speed is about 6.4 kN for 53213; below that preload the balls skid and smear the tracks. Bore-to-OD planning: OD 100 over bore 65 is a 1.54× step for this size, and the 28.7 mm height gives a bore/height ratio of 2.26; use these ratios when the housing recess around the 65 mm shaft is the first constraint. Capacity density: 60.5 kN C from 0.910 kg of bearing steel gives about 66.5 kN per kilogram; static density is correspondingly 164.8 kN/kg at C0 150 kN. Load balance: C0 150 kN against C 60.5 kN gives a 2.48 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 5.5 kN enters the adjusted-life check. Stack/annulus proportions: the 28.7 mm axial stack over the 4,536 mm² washer annulus gives 6.33 mm of height per annular square millimetre ×10⁻³, and at 910 g the bearing holds about 164.8 kN of C0 per kilogram. 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 100 mm washer can tilt inside the U 213 seat; check the actual tilt allowance in the mounting drawing, since the 3.3 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 65 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 213 into the register.
• Minimum axial load still applies with factor A 0.14: a self-aligning seat does not prevent ball skidding, so provide spring preload or sufficient rotor weight at light load and speed.
• 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.
• The sphered housing washer of 53213 MUST run against the U 213 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 53213 as the single sphered pressed steel execution; other order numbers of the 53213 size are different products and may carry different ratings or seating geometry — always quote the full designation including the U 213 seat washer when purchasing.