SKF N 311 ECM/P63 cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF N 311 ECM/P63
- N 3Series
- Cylindrical roller bearings, N 3 series. Series differ in outside diameter and width even when the bore is the same.
- 11Bore
- Bore 55 mm (11 × 5).
- ECM/P63Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
N 311 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF N 311 ECM/P63 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 N 311 ECM/P63 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 N 311 ECM/P63 and any equivalents.
SKF cylindrical roller bearings in the ECM/P series handle high radial loads and fast rotation. The rollers run on raceways parallel to the shaft, which gives the bearing high radial capacity and stiffness. They are common in gearboxes, pumps, electric motors and continuous-process machinery where precision matters.
The part number tells you what is inside. In the ECM/P series, ECM identifies a machined brass cage guided by the rollers, and the P suffix marks a special precision class. The number in front of the letters sets the size and load capacity within the series, so a designation such as N 311 ECM/P63 points to a cylindrical roller bearing with brass cage and a specific manufacturing tolerance. Reading the code correctly makes replacement straightforward.
These bearings show up in food processing, petrochemical, steel and cement plants, where equipment runs continuously under variable loads. Typical locations include speed reducers, conveyor belts, mills, centrifugal pumps and large electric motors, as well as machine tools and material handling equipment where radial load and speed both demand a stiff, precise bearing.
Selection starts with radial load, rotation speed and lubrication. The machined brass cage suits high demands and elevated temperatures. Sealing also matters: in a contaminated environment, consider an execution with seals or shields. During mounting, check alignment between shaft and housing and respect the recommended internal clearance. Use the lubricant specified by the equipment manufacturer and proper tools to avoid damaging the raceways.
Equivalent bearings from other brands can be interchanged when main dimensions, tolerances and cage type match. A similar code is not enough; compare the execution, the precision suffix and the service conditions. MR Industrial Accessories supplies SKF and can help you confirm a suitable equivalent for your equipment. Validating interchangeability against the original bearing specifications is always recommended.
Dimensions
55 x 120 x 29 mm (d x D x B): boundary dimensions for basic designation N 311, according to ISO 15.
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 29mm
Same size, other brands
Other brands' pages with basic designation N 311: 55 x 120 x 29 mm (d x D x B) per ISO 15.
- FAGN311-E-XL-TVP2
- NSKN 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 N 311 ECM/P63 bearing: what are its dimensions?
- SKF N 311 ECM/P63 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 N 311.
- What does the ECM/P suffix mean in an SKF bearing?
- ECM indicates a machined brass cage guided by the rollers, and P refers to a special precision class. Both details affect how the bearing behaves under load and speed, so keep them when replacing the component.
- How do I know if a bearing from another brand can replace the SKF one?
- Compare main dimensions, tolerances, cage type and execution. A similar code alone is not enough. MR Industrial Accessories can help you validate the equivalence against your equipment specifications and application.
- What should I check when mounting a cylindrical roller bearing?
- Verify alignment between shaft and housing, the internal clearance and the specified lubrication. Use adequate tools to protect the raceways. In contaminated environments, consider an execution with seals or shields.