SKF 6305-2ZNR 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 6305-2ZNR
- 63Series
- Deep groove ball bearings, 63 series. Series differ in outside diameter and width even when the bore is the same.
- 05Bore
- Bore 25 mm (05 × 5).
- 2ZNRSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
6305 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 6305-2ZNR measures 25 mm across the bore and 62 mm across the outside diameter; its width is 17 mm (25 x 62 x 17 mm).
SKF 6305-2ZNR 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 6305-2ZNR and any equivalents.
When you need a bearing that keeps contaminants out and stays put in the housing, the SKF ZNR series deep groove ball bearing is a practical choice. The ZNR suffix means the bearing has a metal shield and a retaining ring on the outer ring. The shield blocks dust and keeps grease in, while the ring locks the bearing axially in place. This eliminates the need for separate side covers or other retention hardware.
Reading the part number helps you order correctly. In a code like 6002-2ZNR, the 6002 is the basic bearing number, which tells you the size and series. The 2Z means there are two metal shields, one on each side. The NR indicates a groove in the outer ring with a snap ring installed. That ring acts as an axial stop when the bearing sits in a through-bore housing.
These bearings are common in small electric motors, gearboxes, centrifugal pumps, fans, conveyors, and agricultural equipment. They work well where the inside of the bearing must stay clean and dry, and where you also need to fix the axial position. Maintenance teams in food processing, textiles, and metalworking often use them when replacing bearings in imported or domestic machinery.
Choosing the right bearing depends on load, speed, and operating environment. The 2Z shield does not touch the inner ring, so it allows higher speeds than a contacting seal. However, it offers less protection against moisture. Make sure your housing has the groove for the retaining ring, and check that the shaft tolerance is correct. These bearings come pre-lubricated for life. If you plan to relubricate, consider a version with removable shields or seals instead. Proper alignment between shaft and housing is essential to avoid extra loads.
Interchangeability is possible with other brands if the dimensions and protection type match. For example, an SKF bearing can be replaced by an equivalent from another manufacturer, but always confirm the dimensions and the retaining ring style before swapping. MR supplies SKF bearings and can help you find the right replacement.
To request a quote for an SKF deep groove ball bearing with ZNR suffix, send the complete part number via WhatsApp. The MR team will respond with a quote and alternatives. If you only have shaft and housing dimensions, we can also help you identify the correct bearing.
More SKF versions in the 6305 series
SKF lists these 6305 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 6305 ETN9
- SKF 6305 N
Dimensions
25 x 62 x 17 mm (d x D x B): boundary dimensions for basic designation 6305, according to ISO 15.
- Bore
- 25mm
- Outside diameter (D)
- 62mm
- Width (B)
- 17mm
Same size, other brands
Other brands' pages with basic designation 6305: 25 x 62 x 17 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 6305-2ZNR bearing: what are its dimensions?
- SKF 6305-2ZNR measures 25 mm across the bore and 62 mm across the outside diameter; its width is 17 mm (25 x 62 x 17 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 6305.
- What does the ZNR suffix mean on an SKF bearing?
- The Z stands for a metal shield (or two shields if it is 2Z), and NR means the outer ring has a groove with a retaining ring. This design protects against contaminants and allows the bearing to be fixed axially in the housing.
- Can a 2ZNR bearing be relubricated?
- These bearings are lubricated for life. If you need to relubricate, choose a version with removable seals or provide an external lubrication system. The 2Z shield is not made for frequent relubrication.
- How can I tell if the 6203-2ZNR bearing will fit my equipment?
- Check the shaft and housing dimensions, the load type, and the speed. If they match the bearing's specifications, it will fit.