YELAG-206 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 YELAG-206 model number is decoded

YELAG 206 is SKF's 30 mm-bore eccentric-locking-collar insert bearing with the inner ring extended on both sides 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 30x62x36.5 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 YEL 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 both sides. the size code 206 carries the usual bore arithmetic — 30 mm (code 06 x 5) — while the leading 2 marks the ISO 15 diameter series 2 sphered-OD envelope. AG marks the agricultural-machinery application execution, built on the sealed both-sides-extended geometry and tuned for the low-speed, shock-laden duty of harvesters, balers and spreaders — note the catalogue prints a much reduced limiting speed for this variant. Envelope 30x62x36.5 mm (1.181x2.441x1.437 in), outer ring 18 mm wide, C 19.5 kN, C0 11.2 kN, Pu 0.475 kN. Mounted width B1 48.4 mm includes the eccentric collar. The catalogue publishes a single speed ceiling, the limiting speed: 1,200 r/min; mass 380 g. Width accounting: B1 48.4 mm covers the bearing WITH its eccentric locking collar against 36.5 mm for the bearing itself and 18 mm outer-ring width; housing axial space is drawn to B1, seal replacement space to B. Pitch-diameter arithmetic: dm = (30+62)/2 = 46 mm; at the 1,200 r/min limiting speed the ball set runs at dn approx 0.55x10^5, reduced from an open bearing mainly by seal lip friction and the life-long grease fill. Fillet discipline: the printed r_min 0.6 mm limit means shaft and housing fillets must stay under that radius; a fillet that bottoms the 30x62 mm insert on its chamfer tilts the whole spherical seat. Load balance for documentation: C0 11.2 kN against C 19.5 kN gives a 0.574 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. Bore-to-OD planning: OD 62 over bore 30 is a 2.067x step, while bore/overall-width gives 0.822; the spherical seat in the matching Y-housing must be specified to the 62 mm OD, not to a cylindrical housing bore. Direction rule for YELAG-206: the eccentric collar self-tightens in the shaft's running direction, so mark rotation at mounting; the 30 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 30 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 48.4 mm includes collar space — a housing sized for a grub-screw insert of the same OD can be too narrow axially for the YEL collar.
• Catalogue ratings belong to YELAG 206 as the ecc two ag execution; other order numbers of the YELAG 206 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.