SKF 6306-ZNR/C3 deep groove ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Deep groove ball 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 6306-ZNR/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).
- ZNR/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-ZNR/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-ZNR/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-ZNR/C3 and any equivalents.
For maintenance and purchasing teams, SKF deep groove ball bearings with -ZNR and /C3 suffixes offer a practical combination: a shield for basic protection, a snap ring for simplified axial location, and extra internal clearance for demanding operating conditions. They handle radial and axial loads in both directions and are common in motors, pumps, fans, conveyors, and similar equipment.
The part number tells you what you are getting. The numeric prefix defines the size and series, such as 6211 or 6306. The -Z suffix means a shield on one side. The N indicates a groove in the outer ring for a retaining ring, and the R confirms the ring is included. The /C3 suffix calls for greater internal radial clearance than standard, which suits elevated temperatures or interference fits.
These bearings are found in food processing, chemical, mining, and general manufacturing. You will see them in electric motors, pumps, fans, conveyors, and transmission machinery. The retaining ring allows axial mounting in housings without extra covers, which simplifies assembly. The shield helps in areas with moderate particles.
When selecting a -ZNR/C3 bearing, review the radial and axial loads, rotation speed, and environment. Choose C3 clearance if thermal expansion is expected or if the shaft and housing fits will reduce internal clearance. Align shaft and housing carefully during installation and avoid impacts on the retaining ring. Use lubrication matched to the operating temperature and speed; many of these bearings arrive pre-lubricated.
Equivalents from other makers may exist, but always compare critical dimensions and internal clearance. Suffix meanings are not universal, so verify specifications before substituting. MR supplies SKF bearings and can help you confirm the right replacement.
To request a quote, send the complete bearing code by WhatsApp or email. Include the part number and any application details. The team responds promptly and can suggest equivalents or help you choose the correct option.
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-ZNR/C3 bearing: what are its dimensions?
- SKF 6306-ZNR/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 -ZNR suffix mean on an SKF bearing?
- It indicates a shield on one side (Z), a groove for a retaining ring in the outer ring (N), and that the retaining ring is supplied (R). This arrangement simplifies axial mounting and adds protection against contaminants.
- When should I use a bearing with C3 clearance?
- C3 clearance is suitable when the bearing will run at elevated temperatures, when interference fits reduce internal clearance, or when greater tolerance to thermal expansion is needed. It helps avoid overloads and premature failure.
- Are SKF -ZNR/C3 bearings interchangeable with other brands?
- They may be interchangeable with equivalent bearings from other manufacturers, but you must verify dimensions, internal clearance, and seal type. Suffix meanings vary between brands, so it is best to consult a specialist.