SKF NU 311 ECP/C3L cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NU 311 ECP/C3L
- NU 3Series
- Cylindrical roller bearings, NU 3 series. Series differ in outside diameter and width even when the bore is the same.
- 11Bore
- Bore 55 mm (11 × 5).
- ECP/C3LSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 311 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 311 ECP/C3L measures 55 mm across the bore and 120 mm across the outside diameter; its width is 29 mm (55 x 120 x 29 mm).
SKF NU 311 ECP/C3L 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 311 ECP/C3L and any equivalents.
The SKF NU ECP series is a cylindrical roller bearing built to handle significant radial loads at considerable speeds. Its cylindrical rollers and stamped steel cage support robust operation in demanding industrial settings. Typical uses include transmissions, pumps, compressors and heavy machinery. MR Industrial Accessories supplies this brand and can help you select the correct execution for your equipment.
Reading the designation: NU means a cylindrical roller bearing with two ribs on the outer ring and none on the inner ring, so the shaft can move axially relative to the housing. ECP identifies a stamped steel cage with a centered window and high-capacity rollers. The suffix C3L combines greater-than-standard internal radial clearance with a special factory lubrication. As an example, NU 311 ECP/C3L brings these features together for a 55 mm shaft diameter.
These bearings appear in cement, steel, paper and food processing plants. Common equipment includes conveyor belts, mills, centrifugal pumps, gear reducers and mining machinery. Their capacity for heavy radial loads and resistance to fatigue suit them to continuous duty. The separable design also allows them to accommodate thermal expansion of the shaft.
When selecting, consider radial load, rotational speed and required internal clearance. The C3L suffix denotes increased clearance, which is advisable for interference fits or elevated temperatures. Factory lubrication should be supplemented to match operating conditions. During mounting, check alignment between shaft and housing and confirm the sealing arrangement to keep contamination out. The ECP cage separates, which simplifies maintenance.
Other manufacturers offer bearings with similar designations, but they do not always match exactly. The SKF NU ECP series can be interchanged with competitor products that share the same dimensions and tolerances, yet the internal clearance and cage type must be verified. MR Industrial Accessories can assist in finding the right reference.
To request this bearing, send the complete part number through WhatsApp or email to MR Industrial Accessories. The team will respond promptly with a quote and can suggest equivalents or help you choose the best option for your application.
Dimensions
55 x 120 x 29 mm (d x D x B): boundary dimensions for basic designation NU 311, according to ISO 15.
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 29mm
Same size, other brands
Other brands' pages with basic designation NU 311: 55 x 120 x 29 mm (d x D x B) per ISO 15.
- FAGNU311-E-XL-TVP2
- NSKNU311E
- NTNNU311NU311EA
- RKBNU 311
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 311 ECP/C3L bearing: what are its dimensions?
- SKF NU 311 ECP/C3L measures 55 mm across the bore and 120 mm across the outside diameter; its width is 29 mm (55 x 120 x 29 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 311.
- What does the C3L suffix indicate on this bearing?
- C3L means the bearing has greater-than-standard internal radial clearance (C3) plus a special factory lubrication (L). This combination is beneficial where interference fits or elevated temperatures require compensation for expansion.
- Can this bearing be replaced with one from another brand?
- It may be interchangeable with bearings from other manufacturers that have identical dimensions and tolerances. However, you must check the internal clearance and cage type. Consulting a specialist before replacement is recommended.
- What is the correct way to mount an NU ECP bearing?
- Ensure precise alignment between the shaft and housing, and verify the sealing to prevent contamination. The cage is separable, which aids mounting. Follow the manufacturer's guidelines for fit and lubrication.