YSPAG-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 YSPAG-205 model number is decoded

YSPAG 205 is SKF's 25 mm-bore SKF ConCentra insert bearing with concentric stepped-sleeve locking and symmetrically extended inner ring in the YSP2 series — a Y-bearing with a spherically ground outside surface for static self-alignment inside a matching SKF Y-housing, boundary dimensions 25x52x33.2 mm. The ConCentra principle replaces point or eccentric clamping: a stepped sleeve between shaft and inner ring is driven axially to contract uniformly, concentric with the sphered-OD sealed ball insert. the YSP prefix names SKF ConCentra locking: a stepped (multi-diameter) sleeve between shaft and inner ring is driven axially to grip concentrically, avoiding the local shaft fretting of set screws or the imbalance of an eccentric collar. 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. 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 25x52x33.2 mm (0.984x2.047x1.307 in), outer ring 15 mm wide, C 14 kN, C0 7.8 kN, Pu 0.335 kN. The catalogue publishes a single speed ceiling, the limiting speed: 1,500 r/min; mass 180 g. Capacity density: 14 kN from 0.180 kg of bearing steel is about 77.778 kN per kilogram, and per width millimetre the 33.2 mm unit carries 0.422 kN of dynamic capacity. Inner-geometry cross-reference: the catalogue shoulder diameters (d1 33.7 mm, d2 41.7 mm) set the shaft-abutment and sleeve limits; an abutment larger than these numbers contacts the seal or the inner flinger. Spherical-seat note in numbers: the 52 mm OD is ground spherical, so the self-aligning pivot happens on a circle roughly pi x 38.5 = 120.951 mm in mean circumference — keep that interface greased, because corrosion locking turns the pivot into a fixed misaligned mount. Envelope arithmetic: the radial section from 25 mm bore to 52 mm OD is 13.5 mm; dividing C 14 kN by that section gives 1.037 kN per section millimetre, and the 33.2 mm overall width is 2.459x the section. Outer-vs-overall width: the outer ring is 15 mm wide inside the 33.2 mm total, so the extended inner ring accounts for 0.548 of the overall width (9.1 mm of axial projection per side). Sleeve geometry: the ConCentra stepped sleeve occupies the symmetric extension up to the 33.2 mm overall width while the sphered outer ring stays 15 mm wide — uniform sleeve contraction is why run-out stays low at 25 mm bore.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• ConCentra solves run-out and fretting but not gross misalignment — the housing spherical seat still carries that function; do not use the sleeve grip as an excuse to skip housing alignment.
• The SB shortened-inner-ring ConCentra unit needs its matching mounting sleeve and procedure; substituting a standard YSP sleeve or a generic drift is the usual cause of crooked drive-up on the 25 mm shaft.
• Inspect the shaft before sleeve mounting: a single deep keyway burr or old screw-point dimple under the 33.2 mm-wide sleeve causes a local unclamped arc that later frets.
• Ordering discipline for the 25 mm size: the chapter lists several executions side by side (YSP2 locking style x seal package x application variant); a bare-number substitution needs a fresh dimension, speed and rating check rather than a like-for-like assumption.