SKF NUP 309 ECJ/C3 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Since 1945 · Martínez, Buenos Aires, Argentina
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Other brands in this category
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How to read SKF NUP 309 ECJ/C3
- NUP 3Series
- Cylindrical roller bearings, NUP 3 series. For the same bore, each series has a different outside diameter and width.
- 09Bore
- 45 mm bore: 09 × 5.
- ECJ/C3Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
NUP 309 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF NUP 309 ECJ/C3 bearing has a 45 mm bore, a 100 mm outside diameter and a 25 mm width (45 x 100 x 25 mm).
SKF NUP 309 ECJ/C3 is a reference of cylindrical roller bearing, within Bearings. Request a quote for NUP 309 ECJ/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF NUP series cylindrical roller bearings are components designed to support high radial loads and considerable speeds. Their design with cylindrical rollers and flanges on both rings allows radial mounting and dismounting, and their alignment capability is limited. They are used in industrial applications requiring high rigidity and precision, such as machine tools, electric motors and gearboxes. MR Accesorios Industriales supplies this line as part of its SKF bearing offering.
The NUP designation corresponds to cylindrical roller bearings with one fixed flange on the inner ring and two flanges on the outer ring, which allows axial displacement in both directions. The ECJ suffixes indicate a high-capacity stamped steel cage, while C3 indicates an internal radial clearance greater than standard. For example, NUP 309 ECJ/C3 and NUP 310 ECJ/C3 are part numbers that combine these characteristics for specific applications.
These bearings are used in industries such as metallurgy, cement, paper and machine tools. In Argentina, they are common in speed reducers, industrial pumps, large electric motors and mining equipment. Their ability to support heavy radial loads and their rigidity make them suitable for transmissions that demand precision and durability under severe conditions.
To select the right bearing, take into account the radial load, rotation speed and environmental conditions. C3 clearance is advisable when thermal expansion or interference fits are expected. Mounting must be carried out with suitable tools to avoid damage to the rollers and raceways. Lubrication, whether with grease or oil, must be correct for the application, and alignment between shaft and housing is critical to avoid additional loads.
Regarding equivalences, SKF NUP bearings can be interchanged with those from other brands that follow the same international designation, such as FAG, NSK or NTN, provided dimensions and tolerances are verified. It is important to consult compatibility tables and not rely only on the part number, since there may be variants in cages or clearances. MR Accesorios Industriales can advise you on selecting the equivalent part number.
If you need a quote for an SKF NUP bearing, send us the complete part number by WhatsApp. At MR Accesorios Industriales we help you identify the correct part number and resolve your technical doubts. We are your reliable power transmission partner.
Dimensions
Boundary dimensions of the basic designation NUP 309 per ISO 15: 45 x 100 x 25 mm (d x D x B).
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 25mm
The same size in other brands
Pages from other brands with the basic designation NUP 309: 45 x 100 x 25 mm (d x D x B) per ISO 15.
They share the boundary dimensions set by ISO 15, not the technical data: seals or shields, internal clearance, cage and load rating can differ by brand and suffix. We quote each one by its full part number.
Frequently Asked Questions
- What are the dimensions of the SKF NUP 309 ECJ/C3 bearing?
- The SKF NUP 309 ECJ/C3 bearing has a 45 mm bore, a 100 mm outside diameter and a 25 mm width (45 x 100 x 25 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation NUP 309.
- What does the ECJ suffix mean on an SKF bearing?
- ECJ indicates a high-capacity stamped steel cage, designed to support high loads and high speeds. It is a standard designation in SKF cylindrical roller bearings.
- When is it advisable to use a bearing with C3 clearance?
- C3 clearance is recommended when there is thermal expansion, interference fits or high speeds, since it provides additional margin that prevents premature seizure.
- Can I replace an SKF NUP with another brand?
- Yes, as long as the designation and dimensions match. Brands such as FAG, NSK or NTN offer equivalents, but verify tolerances and cage type before replacing.