SKF NJ 320 ECML/C405H cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding SKF NJ 320 ECML/C405H
- NJ 3Series
- Cylindrical roller bearings, NJ 3 series. Series differ in outside diameter and width even when the bore is the same.
- 20Bore
- Bore 100 mm (20 × 5).
- ECML/C405HSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NJ 320 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NJ 320 ECML/C405H measures 100 mm across the bore and 215 mm across the outside diameter; its width is 47 mm (100 x 215 x 47 mm).
SKF NJ 320 ECML/C405H 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 NJ 320 ECML/C405H and any equivalents.
For maintenance and purchasing teams specifying a single-row cylindrical roller bearing, the SKF NJ ECML/C…H series combines a machined brass cage with a retaining ring groove on the outer ring. It is built to carry high radial loads at high speeds and to permit axial displacement in one direction, which makes it a common choice in gearboxes, machine tools and power transmission equipment where precision and rigidity matter.
Reading the code helps you confirm you are ordering the right variant. NJ means two ribs on the outer ring and one on the inner ring, so the bearing allows axial movement in a single direction. ECML points to the optimized internal design with a machined brass window cage. The C…H suffix identifies the retaining ring groove on the outer ring, with the accompanying number defining the groove variant. Take NJ 320 ECML/C405H: bore 100 mm, outer diameter 215 mm, width 47 mm.
These bearings show up in metallurgy, cement, mining and machinery manufacturing. Typical equipment includes gearboxes, industrial pumps, compressors, induced draft fans and machine tool spindles. The combination of radial load capacity and high-speed capability suits assets that run continuously under demanding conditions.
Selection comes down to radial load, rotational speed and lubrication method. The machined brass cage tolerates higher speeds and temperatures than a stamped steel cage. Because the C…H suffix provides a retaining ring groove, the bearing can be located axially in the housing without extra covers. Check shaft-to-housing alignment and confirm that grease or oil delivery matches the operating conditions.
Interchange is possible with cylindrical roller bearings from other brands that use a similar designation, but always verify tolerances and internal clearance. The SKF NJ series matches bearings of the same configuration from other European manufacturers, though suffixes can differ. If you are unsure, send the complete part number and our team can suggest equivalents and help you choose.
Dimensions
100 x 215 x 47 mm (d x D x B): boundary dimensions for basic designation NJ 320, according to ISO 15.
- Bore
- 100mm
- Outside diameter (D)
- 215mm
- Width (B)
- 47mm
Same size, other brands
Other brands' pages with basic designation NJ 320: 100 x 215 x 47 mm (d x D x B) per ISO 15.
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 NJ 320 ECML/C405H bearing: what are its dimensions?
- SKF NJ 320 ECML/C405H measures 100 mm across the bore and 215 mm across the outside diameter; its width is 47 mm (100 x 215 x 47 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NJ 320.
- What does the C…H suffix indicate?
- It indicates a retaining ring groove on the outer ring. The number after the C identifies the groove variant, allowing the bearing to be fixed axially in the housing without side covers.
- Can this bearing take axial loads?
- Yes, but only in one direction because of the NJ rib arrangement. For axial loads in both directions, other arrangements are needed, such as two NJ bearings facing each other or an NUP bearing. Contact us to discuss the best setup for your equipment.
- When should I choose a brass cage over a steel cage?
- The machined brass cage (ECML) is preferable for high speeds, elevated temperatures or severe loads. A stamped steel cage is suitable for standard applications. If your equipment operates under demanding conditions, select the brass cage version.