566-563 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); 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 566-563 model number is decoded

The 28.6 mm radial section height ((127−69.85)/2) and 1950 g catalogue mass frame a 69.85 mm bore bearing rated at 217 kN C — roughly 3.11 kN of dynamic capacity per millimetre of bore before application factors. Mounting practice for 566: the rotating cone takes the interference fit (k5 on a 69.85 mm shaft), the cup slides for axial location, and reversing-thrust duty demands a paired O/X set rather than one bearing. Load system: the 217 kN basic dynamic rating C and 255 kN static rating C0 give a C0/C balance of 1.18, and dividing C by the 69.85 mm bore yields 3.11 kN per millimetre of journal — a density metric that compares across families; the 29 kN fatigue limit Pu is the floor beneath which the adjusted-life calculation drops below acceptable L10 hours for a 69.85 mm shaft carrying variable duty. The cup reference 563 is structural, not a suffix: it identifies the outer ring that, combined with the 566 cone, produces the 69.85/127/36.512 mm envelope catalogue-listed as 566. Quote the cup number in full when ordering — the 565-series tables contain other cups that fit the same cone but change the bearing.566 is a single-row tapered roller bearing in the 565-series inch series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by SKF in SKF catalogue PUB BU/P1 17000.Numbering ties the bearing to its inch-series envelope: 566 means a cone and cup matched pair in the 565-series series — which is why the 69.85×127×36.512 mm outline swaps dimensionally with other inch-series bearings of the same code. SKF lists the plain number as the basic execution; letter suffixes such as B denote a steeper contact angle and are different order numbers.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Mount the 69.85 mm bore 566 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
• The 565-series inch series at 69.85 mm bore (127×36.512 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 566 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• The tapered contact angle creates an induced axial load under pure radial force; include it in the 566 rating calculation (and account for it in both bearings of a pair) or the unloaded bearing skids its rollers.
• Shaft and housing fillets must clear the bearing chamfer so the 36.512 mm-wide cup seats square; use an undercut or withdrawal groove rather than an oversized radius that locks on the ring face.
• The 217/255 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of 566 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 566/563 designation when purchasing and match the execution to the mounting arrangement.