54317 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 54317 model number is decoded

The 54300 series order number 54317 is a SKF double-direction thrust ball bearing for a 70 mm seat, built to ISO 104, with a sphered housing washer paired to a U seat washer, 70×150×95.2 mm boundary dimensions. Inside the unit sit a single central shaft washer with a ground interference bore, two outward-facing loose housing washers and two independent ball-cage assemblies, so axial force is reacted in both directions from one housing recess. bore-coding caveat: on 52/54 double-direction bearings the last two digits are an order-number code, not ×5 millimetres — this size carries a 70 mm bore per the ISO 104 table, and guessing from the code gives the wrong shaft. 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 70×150×95.2 mm (2.756×5.906×3.748 in), 40.0 mm radial section, C 174 kN, C0 405 kN, Pu 14 kN. Mounted height H1 105 mm includes the U 317 seat washer; the bearing alone is 95.2 mm high. reference speed 1,100 r/min (thermal) and limiting speed 1,500 r/min (mechanical), catalogue mass 7950 g. Sizing arithmetic on the 70 mm bore: 174 kN C over the 40.0 mm radial section gives 4.3 kN per section millimetre, and the 95.2 mm stack height is 2.38× that section — proportions typical of a 54300 thrust section. Light-load floor: Pu = 14 kN is the equivalent-load threshold below which the SKF adjusted-life equation credits very long life for 54317; the number is 8 % of the 174 kN dynamic rating. Static-first selection data: 405 kN C0 spread across the 95.2 mm stack gives 4.3 kN of static rating per height millimetre, and the 7950 g mass/C0 ratio is about 20 g per static kN — crane-hook and screw positions are normally sized on these two figures. Pitch-diameter arithmetic: dm = (70+150)/2 = 110.0 mm; at the 1,500 r/min limiting speed that corresponds to roughly 165k mm·r/min, the figure used when comparing cage speed demand across the thrust-ball series. Load balance: C0 405 kN against C 174 kN gives a 2.33 ratio — thrust ball bearings are chosen on static rating and F_a/C0 far more often than on L10 life, while Pu 14 kN enters the adjusted-life check. Bidirectional self-aligning note: TWO U seat washers are required for this order number, one behind each housing washer, and the catalogue H1 height includes them on both sides of the stack; the spherical interfaces accept initial misalignment in either load direction but are not pivots for continuous oscillation. Bill of materials for this page is 54317 plus TWO × U 317; the 105 mm H1 stack sits in a housing whose two register faces should be machined in one clamping to keep both spherical axes coincident.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The two spherical interfaces accommodate initial misalignment in either load direction but must stay clean, greased and static — continuous rocking frets the sphered contacts of even the 405 kN static-rated set.
• Replacement ordering is THREE numbers: 54317 plus two pieces of U 317; quoting only the bearing leaves the sphered backs running on bare registers.
• Assembly is a five-component stack (central shaft washer, two cage sets, two sphered housing washers) plus the two U seat washers in the housing registers; dry-build the arrangement by hand first to confirm both sides swivel freely.
• Minimum load factor A 1.1 applies to both load directions, and both brass pressed cage sets need lubricant reaching the upper track on a vertical shaft.
• The 174/405 kN figures belong to 54317 specifically (the double sphered pressed steel execution of 54317); suffixed, sphered and counterpart-series order numbers are separate articles, and U 317 is ordered separately, so write the complete designation on the order and the maintenance record.