SKF 6304 NR/C3 deep groove ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Deep groove ball bearings
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Other brands for this category
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Decoding SKF 6304 NR/C3
- 63Series
- Deep groove ball bearings, 63 series. Series differ in outside diameter and width even when the bore is the same.
- 04Bore
- Bore 20 mm (04 × 5).
- NR/C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
6304 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 6304 NR/C3 measures 20 mm across the bore and 52 mm across the outside diameter; its width is 15 mm (20 x 52 x 15 mm).
SKF 6304 NR/C3 belongs to deep groove ball 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 6304 NR/C3 and any equivalents.
For equipment that needs a single-row deep groove ball bearing with a snap ring and extra internal clearance, the SKF NR/C3 line covers that requirement. The NR suffix adds a retaining ring on the outer ring, while C3 indicates clearance above the standard value. MR Industrial Accessories LLC supplies this series to maintenance and purchasing teams across the United States and Latin America.
Reading the part number is straightforward once you know the suffixes. Take 6205 NR/C3: the first digits identify the series, here 62. Series 60 uses a lighter cross section, while 63 is heavier. NR tells you the bearing comes with a retaining ring. C3 tells you the internal radial clearance is larger than standard. Match those three elements, and you have the right reference.
The retaining ring is what makes this design useful in many housings. It locates the bearing axially without shoulders, covers or extra components, which keeps the housing simpler. These bearings handle moderate radial and axial loads and suit electric motors, centrifugal pumps, fans, gearboxes, conveyors and agricultural equipment.
Selection comes down to load, speed and environment. Choose C3 when temperature differences between shaft and housing are expected, or when the fit is an interference fit. For contamination, decide between seals and shields based on how dirty the application is. Lubrication must match temperature and speed; factory grease often works, but critical applications may need periodic relubrication. Shaft and housing alignment should be checked to avoid extra loads.
Interchange is possible between brands when the main dimensions and suffix type match, though retaining ring and clearance nomenclature can vary. Verify the complete part number and tolerances before substituting. MR Industrial Accessories LLC supplies SKF and can advise on interchangeability with other brands it distributes.
To request a quote, send the complete part number by WhatsApp or email. The team helps identify the correct replacement and answers questions about mounting, lubrication or application.
More SKF versions in the 6304 series
SKF lists these 6304 series versions in its catalogs, but they don't have a page on this site. Send us the part number of any of them and we'll find it and quote it.
- SKF 6304 ETN9
- SKF 6304 N
Dimensions
20 x 52 x 15 mm (d x D x B): boundary dimensions for basic designation 6304, according to ISO 15.
- Bore
- 20mm
- Outside diameter (D)
- 52mm
- Width (B)
- 15mm
Same size, other brands
Other brands' pages with basic designation 6304: 20 x 52 x 15 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 6304 NR/C3 bearing: what are its dimensions?
- SKF 6304 NR/C3 measures 20 mm across the bore and 52 mm across the outside diameter; its width is 15 mm (20 x 52 x 15 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 6304.
- What does NR mean on an SKF bearing?
- NR means the bearing has a retaining ring on the outer ring. That ring allows axial location in the housing without covers or shoulders.
- When should I choose C3 clearance?
- C3 clearance suits high operating temperatures, interference fits, or situations where slight misalignment tolerance is needed.
- Can I use another brand instead of SKF NR/C3?
- Yes, if bore, outer diameter, width and suffix type match. Check the full part number and tolerances because retaining ring and clearance codes differ between manufacturers.