SKF NU 2309 ECP/P6VQ3751 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NU 2309 ECP/P6VQ3751
- NU 23Series
- Cylindrical roller bearings, NU 23 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- ECP/P6VQ3751Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 2309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 2309 ECP/P6VQ3751 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm).
SKF NU 2309 ECP/P6VQ3751 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 2309 ECP/P6VQ3751 and any equivalents.
SKF NU series cylindrical roller bearings handle heavy radial loads and run at considerable speeds. Their cylindrical rollers and polyamide cage support precise operation in tough industrial settings. You will find them in heavy machinery, gearboxes, pumps, and transmission equipment, where reliable performance keeps production moving.
The part number tells you a lot. NU means the outer ring has two ribs and the inner ring none, so the bearing allows axial movement. The numbers that follow give the series and dimensions. ECP points to a high-strength polyamide cage. P6 shows a tolerance class for dimensions and running. A code like VQ plus digits, as in NU 2307 ECP/P6VQ3753, marks a manufacturer-specific detail, often tighter tolerances or another special characteristic. Reading these codes helps you pick the right bearing.
You will see these bearings in speed reducers, gearboxes, centrifugal pumps, compressors, machine tools, and mining equipment. The food, cement, and steel industries also use them where radial loads are high and conditions are harsh. Because they tolerate high speeds, they suit electric motors and generators. In plants, they help keep operations running without interruption.
Selection starts with radial load, speed, and the environment. Mounting calls for precise alignment between shaft and housing, as these bearings do not tolerate misalignment well. Grease or oil lubrication extends service life and cuts wear. Choose the seal based on contamination risks. Also check internal clearance and shaft and housing tolerances to get the right fit and avoid early failure.
For equivalents, other brands that follow the same standardized designation work, such as NU 2, NU 3, or NU 22 series. But confirm tolerances and specific features, because suffixes can differ between makers. International standards ensure dimensional interchangeability, yet performance may vary. Always review the technical data before swapping a bearing.
Need a quote for SKF NU series cylindrical roller bearings? Send the full part number via WhatsApp or email. Our team replies promptly, suggests equivalents, and helps you choose the right bearing for your equipment.
Dimensions
45 x 100 x 36 mm (d x D x B): boundary dimensions for basic designation NU 2309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 36mm
Same size, other brands
Other brands' pages with basic designation NU 2309: 45 x 100 x 36 mm (d x D x B) per ISO 15.
- FAGNU2309-E-XL-TVP2
- NSKNU2309ET
- NTNNU2309NU2309EA
- RKBNU 2309
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 2309 ECP/P6VQ3751 bearing: what are its dimensions?
- SKF NU 2309 ECP/P6VQ3751 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 36 mm (45 x 100 x 36 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 2309.
- What does the ECP suffix mean on an SKF bearing?
- ECP indicates a high-strength polyamide cage. This cage works well at high speeds and moderate temperatures, and it is lighter than metal cages.
- How do I choose between an NU and an NJ bearing?
- Look at the ribs. NU has two ribs on the outer ring and none on the inner ring, so it allows axial displacement. NJ has one rib on the inner ring, which limits movement in one direction. Your choice depends on whether you need axial guidance.
- What tolerances should I consider for mounting?
- Check shaft and housing tolerances carefully. Typically, the inner ring gets an interference fit on the shaft and the outer ring a sliding fit in the housing. Follow the manufacturer's recommendations for your load and operation.