SKF NU 340 ECMA cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Decoding SKF NU 340 ECMA
- NU 3Series
- Cylindrical roller bearings, NU 3 series. Series differ in outside diameter and width even when the bore is the same.
- 40Bore
- Bore 200 mm (40 × 5).
- ECMASuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 340 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 340 ECMA measures 200 mm across the bore and 420 mm across the outside diameter; its width is 80 mm (200 x 420 x 80 mm).
SKF NU 340 ECMA 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 340 ECMA and any equivalents.
For maintenance and purchasing teams dealing with high radial loads, the SKF NU ECMA cylindrical roller bearing is a separable, brass-caged component built for demanding machinery. This line is part of the SKF bearings we supply to customers across the United States and several Latin American countries. The ECMA suffix points to a machined brass cage and an optimized internal design.
Reading the designation helps you confirm fit and function. NU means the outer ring has no flanges while the inner ring carries two, so the rings can shift axially relative to each other. That makes the bearing a floating support in a two-bearing arrangement. ECMA adds a roller-guided machined brass cage and a reinforced, higher-capacity execution. When you send us a part number, we can help you verify these construction details before you commit.
Typical service conditions include significant radial loads with moderate to high speeds. You will find these bearings in gearboxes, machine tools, industrial pumps, high-flow fans, rolling mills and mining equipment. Industries such as oilseed processing, steel, cement and agricultural machinery manufacturing rely on them where robustness and continuity matter.
Selection depends on the radial load, operating speed and the environment. The machined brass cage handles temperature and dynamic stress well but still needs proper lubrication. During mounting, align the supports precisely and avoid impacts that could damage rollers or raceways. In contaminated areas, add seals or choose a bearing with integrated seals. For interchangeability, equivalent brands may follow the same standardized designation, but always check tolerances and internal clearance, which can differ. Share the complete original part number and our team can suggest equivalents and help you choose.
Dimensions
200 x 420 x 80 mm (d x D x B): boundary dimensions for basic designation NU 340, according to ISO 15.
- Bore
- 200mm
- Outside diameter (D)
- 420mm
- Width (B)
- 80mm
Same size, other brands
Other brands' pages with basic designation NU 340: 200 x 420 x 80 mm (d x D x B) per ISO 15.
- FAGNU340-E-TB-M1
- NSKNU340EM
- NTNNU340
- RKBNU 340
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 340 ECMA bearing: what are its dimensions?
- SKF NU 340 ECMA measures 200 mm across the bore and 420 mm across the outside diameter; its width is 80 mm (200 x 420 x 80 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 340.
- What does the ECMA suffix mean on an SKF bearing?
- It indicates a machined brass cage, roller-guided, and an optimized design for higher load capacity. The E stands for reinforced execution and CMA for the machined brass cage.
- Does this bearing support axial loads?
- No. NU bearings do not support axial loads because the outer ring has no flanges. They work as a floating support to allow axial displacement. For axial loads, use designs such as NJ or NUP.
- How do I know if I can replace an NU ECMA bearing with another brand?
- You can replace it with another bearing that has the same standardized designation, but check tolerances and internal clearance, which may vary. Send us the complete part number and we will advise you on interchangeability.