YET-205 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-205 model number is decoded

YET 205 is SKF's 25 mm-bore eccentric-locking-collar insert bearing with a one-side-extended inner ring in the YEL2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x21.5 mm. The deep-groove ball set is built into an extended inner ring carrying a separate eccentric locking collar; turning the collar against its eccentric seat pinches the shaft, and the sphered outer ring self-aligns in the housing. the YET prefix identifies the eccentric-locking-collar design: a separate eccentric collar turns against a matching eccentric on the extended inner ring to pinch the shaft, extended one side. the size code 205 carries the usual bore arithmetic — 25 mm — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. this suffix-free execution is listed without the sealed external design: the 21.5 mm width is the one-side-extended inner ring alone, so protection depends on the housing seals and the relubrication routine rather than bearing-mounted contact seals. Envelope 25x52x21.5 mm (0.984x2.047x0.846 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. Mounted width B1 31 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 7,000 r/min; mass 200 g. Load balance for documentation: C0 7.8 kN against C 14 kN gives a 0.557 ratio; mounted-unit positions with shock and standstill loading are normally checked on C0, while conveyor and fan duty are evaluated on the L10 figure. Outer-vs-overall width: the outer ring is 15 mm wide inside the 21.5 mm total, so the extended inner ring accounts for 0.302 of the overall width (6.5 mm of axial projection on the locking side). Imperial procurement cross-check: 0.984 in bore, 2.047 in OD, 0.846 in overall width; the 200 g mass converts to 0.200 kg (7.1 oz) for the bill of materials. Pitch-diameter arithmetic: dm = (25+52)/2 = 38.5 mm; at the 7,000 r/min limiting speed the ball set runs at dn approx 2.69x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fatigue-limit check: Pu 0.335 kN is the equivalent-load threshold under which the SKF adjusted-rating model credits very long life for YET 205 — most belt-driven mounted-unit loads sit comfortably under 2.393 % of C. 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-205: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 25 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 25 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 31 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 205 as the ecc one open execution; other order numbers of the YET 205 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.