SKF NU 307 ECML/P63R cylindrical roller bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Other brands for this category
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Decoding SKF NU 307 ECML/P63R
- NU 3Series
- Cylindrical roller bearings, NU 3 series. Series differ in outside diameter and width even when the bore is the same.
- 07Bore
- Bore 35 mm (07 × 5).
- ECML/P63RSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 307 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF NU 307 ECML/P63R measures 35 mm across the bore and 80 mm across the outside diameter; its width is 21 mm (35 x 80 x 21 mm).
SKF NU 307 ECML/P63R 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 307 ECML/P63R and any equivalents.
For shafts that must handle heavy radial forces at elevated speeds, the SKF NU ECML cylindrical roller bearing is a common choice. Its construction combines cylindrical rollers with a machined brass cage, giving the bearing high rigidity and load capacity. Equipment such as machine tools, gearboxes, and power transmission drives often relies on this series. MR Industrial Accessories supplies this brand and can help you confirm the correct bearing for your application.
Reading the NU ECML code helps you understand what you are ordering. NU means the inner ring has no flanges, so the shaft can move axially relative to the housing. EC identifies an optimized geometry that increases load capacity. ML points to a one-piece machined brass cage guided by the inner ring. A suffix such as P…R indicates a special tolerance class, where the number represented by # sets the precision level. In NU 307 ECML/P63R, for instance, 307 is the size per the dimension series, and P63R denotes a reduced radial tolerance. This naming system lets you spot the main features quickly.
You will find this bearing type across many industrial settings: gearboxes, large electric motors, centrifugal pumps, compressors, and machine tools. Mining, steelmaking, and food processing equipment also use it where radial loads are significant and speeds are high. Because the design accommodates axial movement, it suits shafts that expand and contract with temperature changes. Railway and automotive applications appear as well, though less frequently. The sturdy build supports dependable operation in tough conditions.
Selecting the right cylindrical roller bearing starts with the radial load, operating speed, and the surrounding environment. Sealing matters: in dusty or damp locations, consider variants with seals or shields. Lubrication, whether grease or oil, should follow the manufacturer's instructions. During mounting, check that the shaft and housing are aligned to prevent extra loads. Internal clearance also needs attention, particularly in precision uses. Careful installation helps the bearing reach its expected service life and lowers the chance of early failure.
Cylindrical roller bearings from different makers can often be interchanged when their principal dimensions and load ratings agree. Still, tolerances and cage style may differ, so verify those details. The SKF NU ECML series has counterparts in other well-known brands, but comparing technical data is the safe approach. Internal clearance, dimensional accuracy, and cage design all affect performance. At MR Industrial Accessories, we can guide you toward a suitable option for your needs.
To request a quote for an SKF NU ECML cylindrical roller bearing, send us a message on WhatsApp. MR Industrial Accessories offers personal technical support. Include the full bearing code you need, and we will respond promptly with the information required for your application.
Dimensions
35 x 80 x 21 mm (d x D x B): boundary dimensions for basic designation NU 307, according to ISO 15.
- Bore
- 35mm
- Outside diameter (D)
- 80mm
- Width (B)
- 21mm
Same size, other brands
Other brands' pages with basic designation NU 307: 35 x 80 x 21 mm (d x D x B) per ISO 15.
- FAGNU307-E-XL-TVP2
- NSKNU307EW
- NTNNU307EA
- RKBNU 307
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 307 ECML/P63R bearing: what are its dimensions?
- SKF NU 307 ECML/P63R measures 35 mm across the bore and 80 mm across the outside diameter; its width is 21 mm (35 x 80 x 21 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 307.
- What does the ECML suffix mean on an SKF bearing?
- ECML indicates an optimized design with greater load capacity (EC) and a one-piece machined brass cage guided by the inner ring (ML). This pairing supports performance and heat dissipation in demanding applications.
- Does this bearing allow axial displacement?
- Yes. The NU series has an inner ring without flanges, so the shaft and housing can shift axially relative to each other. This helps compensate for thermal expansion and avoids added axial loads.
- How do I choose between a sealed and an open bearing?
- It depends on the environment. Where dust, moisture, or particles are present, a sealed or shielded bearing is advisable. In clean, well-lubricated conditions, an open bearing may be sufficient. Contact us and we will advise based on your application.