SKF NU 309 ECML/P54S1 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NU 309 ECML/P54S1
- NU 3Series
- Cylindrical roller bearings, NU 3 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- ECML/P54S1Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 309 ECML/P54S1 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 25 mm (45 x 100 x 25 mm).
SKF NU 309 ECML/P54S1 belongs to cylindrical roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for NU 309 ECML/P54S1 and any equivalents.
SKF cylindrical roller bearings in the NU ECML/P series are built to handle heavy radial loads at considerable speeds. The machined brass cage and thermal stabilization make them a good fit for demanding industrial machinery. MR supplies this line and can help you match the right execution to your equipment.
Reading the code helps you confirm what you are ordering. NU means the outer ring has two flanges and the inner ring has none, so the shaft can move axially relative to the housing. EC points to a high-strength machined brass cage, ML describes the cage design, and the P…S… suffix covers internal clearance and thermal stabilization. A code such as NU 309 ECML/P54S1 brings all of these together for a specific mounting.
These bearings suit equipment where radial loads are high and speeds range from moderate to high: gearboxes, industrial pumps, fans, machine tools and power transmission drives. Plants in metals, cement, food processing and similar industries rely on them for shafts that need rigidity and precision.
Selection comes down to radial load, speed and the operating environment. Sealing and lubrication deserve attention; in dirty conditions, look at sealed or shielded versions. Choose internal clearance based on working temperature and mounting fit. Supports must be aligned to prevent unwanted axial forces. The brass cage stands up to heat and vibration.
Other brands' cylindrical roller bearings can interchange when the main dimensions, tolerances and clearance match. The NU series with a brass cage is a common industry reference, but always check the original manufacturer's specifications. MR can advise on interchangeability with other part numbers.
When you need a replacement, send the full code through WhatsApp or email. MR will help you confirm the correct selection so your equipment stays up and running.
Dimensions
45 x 100 x 25 mm (d x D x B): boundary dimensions for basic designation NU 309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 25mm
Same size, other brands
Other brands' pages with basic designation NU 309: 45 x 100 x 25 mm (d x D x B) per ISO 15.
- FAGNU309-E-XL-TVP2
- NSKNU309EW
- NTNNU309NU309EA
- RKBNU 309
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- SKF NU 309 ECML/P54S1 bearing: what are its dimensions?
- SKF NU 309 ECML/P54S1 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 25 mm (45 x 100 x 25 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 309.
- What does the NU ECML/P…S… designation tell me?
- NU: cylindrical rollers with two outer-ring flanges; EC: high-strength machined brass cage; ML: cage design; P…S…: internal clearance and thermal stabilization. Each suffix affects mounting and operation.
- Can this bearing carry axial loads?
- The NU series is intended mainly for radial loads. If you have combined axial loads, pair it with a bearing that can take them, such as a ball or tapered roller bearing.
- How do I pick the right internal clearance?
- Clearance depends on operating temperature, fit and speed. Too much clearance can cause vibration; too little can lead to overheating. Share your application data and we will help you choose.