YET-207-104 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 YET-207-104 model number is decoded

Listed in SKF 17000 chapter 2, YET 207-104 is a eccentric-locking-collar insert bearing with a one-side-extended inner ring, 31.75x72x25.4 mm overall, whose convex spherical outer ring pivots in the spherical bore of a Y-pillow, Y-flange or take-up housing. Construction pairs capped deep-groove geometry with a one-piece eccentric locking collar and a convex outer ring — quick to mount on plain commercial shafts and tolerant of initial static misalignment. reading YET: an eccentric locking collar does the shaft clamping (popular where shaft tolerance and quick removal matter), inner ring extended on one side. for inch shafts the order number carries the bore as whole-inches plus sixteenths: -104 = 31.75 mm, which is why this row sits beside, not on, the metric bore size. the bare designation means no factory seal package: unlike the -2F executions this bearing relies on enclosure by the Y-housing and its own re-greasing path, which is why it is normally specified inside well-sealed plummer and flange units. Envelope 31.75x72x25.4 mm (1.25x2.835x1 in), outer ring 19 mm wide, C 25.5 kN, C0 15.3 kN, Pu 0.655 kN. Mounted width B1 38.9 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 5,300 r/min; mass 510 g. Mass-to-load ratio for YET-207-104: 20 g of catalogue mass per rated kN of C, and 16.063 g per millimetre of bore — useful when comparing executions of the same 31.75x72 mm envelope on the drawing. Capacity density: 25.5 kN from 0.510 kg of bearing steel is about 50 kN per kilogram, and per width millimetre the 25.4 mm unit carries 1.004 kN of dynamic capacity. Envelope arithmetic: the radial section from 31.75 mm bore to 72 mm OD is 20.125 mm; dividing C 25.5 kN by that section gives 1.267 kN per section millimetre, and the 25.4 mm overall width is 1.262x the section. Rating split for the maintenance file: dynamic 25.5 kN (L10), static 15.3 kN (s0 shock check), fatigue 0.655 kN (adjusted life) — three separate uses for YET 207-104, none interchangeable with another. Fillet discipline: the printed r_min 1 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 31.75x72 mm insert on its chamfer tilts the whole spherical seat. One-side collar note: the eccentric collar mounts on the extended side only and must turn in the shaft rotation direction to self-tighten; on reversing drives this design can loosen by design intent — choose grub-screw or ConCentra locking for true bidirectional shafts. Direction rule for YET-207-104: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 31.75 mm shaft must be free of burrs under the collar or the eccentric cannot bed flat.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• The eccentric collar is handed to running direction; fit it wrong on the 31.75 mm shaft and self-tightening becomes self-loosening. Mark the shaft rotation before stripping any YEL2 collar unit.
• Never pin or weld the eccentric collar: the controlled eccentric friction is the locking principle, and pinning turns a demountable insert into a shaft-replacement job.
• Overall width 38.9 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YET collar.
• Catalogue ratings belong to YET 207-104 as the ecc one open execution; other order numbers of the YET 207-104 size are different articles (open vs sealed, plain vs rubberized flinger, stainless vs carbon steel) and may carry different ratings or speeds — always quote the full designation.