NU2205 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings) · extracted 2026-09-26

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.1 single-row cylindrical roller bearings); 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 NU2205 model number is decoded

NU2205 is a single-row cylindrical roller bearing in the NU2200 family: line-contact rollers between ground inner and outer raceways, separated by a glass-fibre reinforced polyamide (PA66) cage, listed by SKF in SKF catalogue PUB BU/P1 17000. Digit by digit, NU2205 reads as bearing type NU (single-row, inner ring separable), wide series 22, and bore reference 05 resolving to 25 mm; 52 mm OD and 18 mm width are the matching ISO 15 boundary values. The SKF catalogue adds the ECP suffix for the standard glass-fibre reinforced polyamide cage; ECJ (pressed steel) and ECM (machined brass) are alternative executions with different speed and temperature ratings. With C 39 kN and C0 34 kN, the NU2205 radial-capacity check is straightforward: keep the equivalent load P below the rating at the required L10; axial load is not supported by the NU design. Mount the separable inner ring + roller assembly onto the shaft first, then slide the outer ring into the housing; the NU design has no outer-ring ribs, so axial location of the shaft must be provided by adjacent components or a second bearing.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• At a 25 mm bore the thin roller and raceway are sensitive to misalignment; keep shaft deflection within the 3–4 minute alignment limit and check seat runout (target Ra ≤ 0.8 µm) — a tilted NU2205 develops edge loading and early spalling.
• The NU2200 series at 25 mm bore (52×18 mm) is the wide-section cylindrical roller with higher capacity but lower speed limit than the standard NU200 counterpart; do not substitute without re-checking shaft shoulder diameters and dn limit.
• Open NU2205 units need application-supplied sealing and a defined lubricant supply; the line-contact hertz stress is higher than point contact, so film thickness is the first failure mode when viscosity drops.
• The NU2205 shares its ISO 15 envelope with other cylindrical bearings of the same code but is not a drop-in replacement for a ball bearing: it has no axial load capacity in the NU design, and a deep-groove bearing cannot replace its radial-capacity duty.
• The 39/34 kN ratings are SKF catalogue 17000 values for the ECP polymer-cage 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 NU2205 (ECP polymer cage, ECJ pressed steel, ECM machined brass); they are not interchangeable order numbers — quote the full NU 2205 ECP designation when purchasing and match the execution to the speed and temperature requirements.