53317 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 53317 model number is decoded

53317 is SKF's 85 mm-bore single-direction thrust ball bearing in the 53300 series to the ISO 104 dimension plan, with a sphered housing washer paired to a U seat washer, measuring 85×150×53.1 mm U 317 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 17 encode the bore as 85 mm (code 17 × 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 85×150×53.1 mm (3.346×5.906×2.091 in), 32.5 mm radial section, C 174 kN, C0 405 kN, Pu 14 kN. Mounted height H1 58 mm includes the U 317 seat washer; the bearing alone is 53.1 mm high. reference speed 1,500 r/min (thermal) and limiting speed 2,000 r/min (mechanical), catalogue mass 4350 g. Washer-stack proportions: the U 317 seat washer adds 4.9 mm to the 53.1 mm bearing height for a mounted H1 of 58 mm, while the 32.5 mm radial section against 85 mm bore (section/bore ≈ 0.38) identifies the envelope. Preload at the mechanical ceiling: repeating Fam ≈ A·(n·dm/1000)² with factor A 1.1 at the 2,000 r/min limiting speed raises the required axial preload to about 60.7 kN; the reference-speed value 34.2 kN is the thermal design point. Rating split for documentation: dynamic 174 kN (L10 life), static 405 kN (safety factor s0), fatigue limit 14 kN (adjusted life) — three different uses of three different numbers for 53317, none interchangeable with another. Capacity density: 174 kN C from 4.350 kg of bearing steel gives about 40.0 kN per kilogram; static density is correspondingly 93.1 kN/kg at C0 405 kN. Mass and section check: 4350 g inside the 85×150×53.1 mm outline leaves a 32.5 mm radial section, and the 405 kN static rating is 2.33× the dynamic rating — plan static safety and minimum preload against those figures. 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 317 seat; check the actual tilt allowance in the mounting drawing, since the 4.9 mm washer thickness step does not by itself quantify it.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Replacement orders must list both 53317 and U 317: the seat washer is a separate article, and a U washer of the wrong size narrows the contact band of the 405 kN static-rated set.
• Dimension the housing to the 58 mm mounted height H1 (bearing plus U 317), not the 53.1 mm bearing height H — confusing the two is a recurring drawing error for the 53-series.
• 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 shaft washer remains the tight, ground-bore component on the 85 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 317 into the register.
• Ordering discipline for 53317: the catalogue page quotes 53317 plus U 317 and its 174/405 kN ratings as one exact article; bare-number substitutions from another series or brand need a fresh dimension and rating check, not a like-for-like assumption.