SKF 6306-2RS1NR/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 6306-2RS1NR/C3
- 63Series
- Deep groove ball bearings, 63 series. Series differ in outside diameter and width even when the bore is the same.
- 06Bore
- Bore 30 mm (06 × 5).
- 2RS1NR/C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
6306 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 6306-2RS1NR/C3 measures 30 mm across the bore and 72 mm across the outside diameter; its width is 19 mm (30 x 72 x 19 mm).
SKF 6306-2RS1NR/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 6306-2RS1NR/C3 and any equivalents.
For maintenance and purchasing teams across the United States and Latin America, MR supplies SKF deep groove ball bearings in the 63 series. This medium-section design handles radial and axial loads in both directions, and its compact build suits equipment that needs rigidity and load capacity. The examples shown here, 6306-2RS1NR/C3 and 6308-2RS1NR/C3, combine several suffixes in one part number.
Reading the designation helps you confirm the right fit. The 63 prefix is the dimension series, a medium section that balances capacity and envelope size. The 2RS1 suffix means elastomer seals on both sides, which hold lubricant in and keep contaminants out. NR indicates a groove on the outer ring for a retaining ring, used when the bearing must be fixed axially. C3 calls for radial internal clearance above standard, which suits high-temperature operation or interference fits. Put together, 6306-2RS1NR/C3 and 6308-2RS1NR/C3 illustrate that full combination.
These bearings are common in electric motors, centrifugal pumps, fans, gearboxes, conveyors and agricultural machinery. Because they take combined loads and come sealed, they work well where dust or moderate humidity is present. Food, chemical, petrochemical and metallurgical plants often use them in transmission and continuous-rotation equipment.
Selection comes down to radial and axial load, speed and the surrounding conditions. Choose 2RS1 sealing when particles and water need to be kept away from the raceways. Go with C3 clearance if the bearing runs hot or if the shaft and housing fits may close up the internal clearance. The seals keep lubrication in place, so maintenance is simpler. Align shaft and housing carefully to avoid extra loads and get the most from the bearing.
On equivalences, 63 series deep groove ball bearings with seals and an NR groove can be interchanged with other brands that use the same dimensional and suffix designations. Tolerances and radial clearance can differ from one manufacturer to another, so verify them. ISO dimensions support standard interchangeability, but sealing and clearance must match your application. Our team can confirm the exact equivalent.
To request a quote, send the complete part number by WhatsApp or email. We help you choose the option that fits your equipment and operating conditions, and we reply promptly.
More SKF versions in the 6306 series
SKF lists these 6306 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 6306 ETN9
- SKF 6306 N
Dimensions
30 x 72 x 19 mm (d x D x B): boundary dimensions for basic designation 6306, according to ISO 15.
- Bore
- 30mm
- Outside diameter (D)
- 72mm
- Width (B)
- 19mm
Same size, other brands
Other brands' pages with basic designation 6306: 30 x 72 x 19 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 6306-2RS1NR/C3 bearing: what are its dimensions?
- SKF 6306-2RS1NR/C3 measures 30 mm across the bore and 72 mm across the outside diameter; its width is 19 mm (30 x 72 x 19 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 6306.
- What does the 2RS1 suffix mean on an SKF bearing?
- It indicates elastomer seals on both sides. These seals retain lubricant and block contaminants, which suits dusty or humid environments.
- Why is the NR groove on the outer ring useful?
- The NR groove accepts a retaining ring that fixes the bearing axially in the housing. This prevents unwanted displacement in applications with axial loads and simplifies housing design.
- When should I choose a bearing with C3 clearance?
- C3 clearance is recommended for high-temperature operation, where thermal expansion reduces internal clearance, and for interference fits that may compress the bearing.