NUP314-ECP 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 NUP314-ECP model number is decoded

For a 70 mm shaft, SKF lists NUP314-ECP as single-row caged cylindrical roller: 150 mm OD, 35 mm wide, Pu 29 kN, the catalogue lists 4,800 r/min thermal reference speed and 5,600 r/min mechanical limiting speed. Structurally, the NUP design has two integral flanges on the outer ring plus one integral flange and one loose flange ring on the inner ring. In arrangement terms it is a locating bearing that positions the shaft axially in both directions while keeping the cylindrical-roller radial capacity. The ECP suffix marks the E-design execution with a glass-fibre reinforced polyamide (PA66) cage, limited to 120 °C continuous. Selection arithmetic: C0/C ≈ 0.97 (228 against 236 kN), and the Pu figure 29 kN is the fatigue load-limit floor for the SKF life equation; the catalogue lists 4,800 r/min thermal reference speed and 5,600 r/min mechanical limiting speed. Mounting: the loose inner-ring flange must be fitted on the correct side and retained by the shaft abutment; never omit it during reassembly or the bearing loses its two-direction locating function. A 70 mm seat normally takes a k5 interference with an H6 housing bore when the inner ring rotates.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• Do not use a NUP bearing where a floating non-locating bearing is required — the loose inner flange makes it a locating bearing
• The dimension series 3 (medium-section ISO 15 envelope) envelope is shared with the N/NU/NJ/NUP executions of 314, but flange configuration and axial-locating behaviour differ — quote the full SKF NUP 314 ECP and do not substitute rib styles without checking the shaft locating scheme.
• Catalogue reference and limiting speeds are different criteria: observe the mechanical ceiling even when thermal calculations allow more.
• Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 150 mm raceway.
• The 236/228 kN ratings are SKF catalogue 17000 (2018) values for the ECP execution; re-verify against the current catalogue for critical drives and keep the catalogue version with the specification.