NUH2320-ECMH bearing: complete specifications & equivalents
The NUH2320-ECMH is a ISO 15 radial bearing sized 100 x 215 x 73 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 100 mm |
| Outer diameter D | 215 mm |
| Width B | 73 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 710 kN |
| Basic static load rating C0 | 800 kN |
| Fatigue load limit Pu | 91.5 kN |
| Reference speed (thermal) | 3200 rpm |
| Limiting speed (mechanical) | 3800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 13000 g |
| Manufacturer designation | SKF NUH 2320 ECMH |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.2 high-capacity cylindrical roller bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.2 high-capacity 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. 6.2 high-capacity 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.
Dimensions in inches & NUH2300-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 8.465 in |
| Width B | 2.874 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 57.5 mm |
| Smallest bore in NUH2300-series | 100 mm |
| Largest outer diameter in NUH2300-series | 500 mm |
| Width range across NUH2300-series | 73–155 mm |
| Bore position in NUH2300-series (smallest first) | 1 of 13 |
| Bore above smallest NUH2300-series size | 0 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the NUH2320-ECMH model number is decoded
SKF NUH 2320 ECMH is a high-capacity cylindrical roller bearing sized 100×215×73 mm — a dimension series 23 (medium-section, wide), listed in SKF catalogue PUB BU/P1 17000 ch. 6.2. The NUH configuration means a high-capacity NJ-type execution whose displaced cage bars make room for additional rollers, with two integral flanges on the inner ring; functionally the bearing is the locating partner in paired cross-locating arrangements for heavily loaded shafts, locating axially in one direction. The ECMH suffix denotes the high-capacity execution with a machined brass cage; the /PEX variant is the pinion-shaft special build. The one-piece machined brass cage is reflected in the published speeds and temperature limits. Load-per-bore for the 100 mm seat is about 7.10 kN/mm, typical of dimension series 23 (medium-section, wide); use C0 800 kN for static checks such as crane hook blocks standing under load. Assembly note: typically paired with the matching NCF ECJB non-locating bearing on the same shaft; observe the catalogue shoulder and fillet data for the large inner ring. Heat steel rings inductively to max 120 °C. This is the standard catalogue execution of the high-capacity design. Selected sizes in the range are also produced as /PEX pinion-shaft builds for wind-turbine gearboxes — separate order numbers with their own rating lines and internal profiling; the two must not be mixed using one another’s loads.
Typical equipment & failure modes
Common applications
- wind-turbine rotor pinion shafts
- heavy mining and cement gear drives
- wind turbine gearbox planetary and intermediate shafts
Known failure patterns
- inner-ring raceway spalling from overload or contamination in the line-contact hertz zone
- outer-ring raceway fatigue after extended service at loads above the catalogue L10 rating
- micro-pitting on the profiled rollers under contaminated or starved-lubricant conditions despite the black-oxide treatment
- cage pocket wear from roller skidding at insufficient radial load or during start-up before oil film build-up
- surface distress (micro-pitting) when the EHL film falls below the composite roughness at high specific load
- cage fatigue in heavily reversing wind-turbine load cycles when relubrication intervals are exceeded
- smearing (microwelding) on roller surfaces during skid starts with insufficient minimum load
Selection pitfalls — read before you substitute
- High-capacity NUH and NCF bearings are designed as a locating/non-locating PAIR on the same shaft; fitting two locating NUH bearings can preload the arrangement thermally.
- The /PEX pinion execution carries its own rating line and internal geometry — never substitute a standard NUH 2320 using the /PEX loads.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 215 mm raceway.
- Press-fit force goes through ring faces only; driving a ring home through the rollers brinells the 215 mm raceway.
- The 710/800 kN ratings are SKF catalogue 17000 (2018) values for the ECMH execution; re-verify against the current catalogue for critical drives and keep the catalogue version with the specification.
Frequently asked questions
What are the dimensions and catalogue data of NUH2320-ECMH?
SKF NUH 2320 ECMH is a high-capacity cylindrical roller bearing with 100 mm bore, 215 mm OD and 73 mm width per ISO 15. SKF lists C 710 kN, C0 800 kN, Pu 91.5 kN, reference speed 3,200 r/min and limiting speed 3,800 r/min, mass about 13000 g.
What does the NUH designation and ECMH suffix mean?
The ECMH suffix denotes the high-capacity execution with a machined brass cage; the /PEX variant is the pinion-shaft special build. Structurally this execution has a high-capacity NJ-type execution whose displaced cage bars make room for additional rollers, with two integral flanges on the inner ring.
Can NUH2320-ECMH take axial load and locate the shaft?
In one direction, as the locating member of a high-capacity pair; the matching NCF ECJB bearing floats. It is not a general-purpose axial bearing.
How does NUH2320-ECMH compare with the other executions in the same envelope?
The N/NU/NJ/NUP executions share the ISO 15 envelope and load ratings but differ in flange arrangement and axial-locating behaviour; quote the exact order number.
What limits the service life of this bearing most often?
Line-contact fatigue above the L10 rating, cage wear at light loads and high temperatures, and edge loading from misalignment beyond about 3–4 minutes of arc are the typical failure drivers.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 6.2 high-capacity cylindrical roller bearings on 2026-09-26. Read our editorial & correction policy.