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Spherical roller bearing with tapered bore and lubrication groove · SKF 21306 CC/C3
SKF 21306 CC/C3 spherical roller bearing

SKFBrand we market

SKF 21306 CC/C3 spherical roller bearing

Manufacturer Part Number21306 CC/C3Dimensions: 30 x 72 x 19 mm (d x D x B)Other bearings 30 x 72 x 19 mm →Also searched as: 21306CC/C3 · 21306-CC/C3SKF 213 series: dimension table →
Brand
SKF
Category
Bearings
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Since 1945 · Martínez, Buenos Aires, Argentina

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How to read SKF 21306 CC/C3

213Series
Spherical roller bearings, 213 series. For the same bore, each series has a different outside diameter and width.
06Bore
30 mm bore: 06 × 5.
CC/C3Suffix
SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).

21306 is the standard (ISO) basic designation: it defines the type, the series and the bore.

Description

The SKF 21306 CC/C3 bearing has a 30 mm bore, a 72 mm outside diameter and a 19 mm width (30 x 72 x 19 mm).

SKF 21306 CC/C3 is a reference of spherical roller bearing, within Bearings. Request a quote for 21306 CC/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

SKF spherical roller bearings are self-aligning components with two rows of rollers, designed to support radial and axial loads in both directions, even with angular misalignment between shaft and housing. They are used in applications where shaft flexure or mounting errors require self-aligning capability. MR Accesorios Industriales supplies this line.

The designation of these bearings combines the basic size number with suffixes indicating internal features. For example, in 22324 CC/C3, the prefix 223 identifies the medium-width spherical roller bearing series, followed by 24 indicating the size. The suffix CC indicates the stamped steel cage design, while /C3 specifies an internal radial clearance greater than standard. In 23218 CC/C3, the 232 corresponds to a series with higher axial load capacity. These codes allow selecting the appropriate variant for the application.

These bearings are used in equipment where loads are high and misalignment may occur, such as conveyor belts, mills, crushers, centrifugal pumps, industrial fans and paper machines. In Argentina, they are common in the cement, mining, steel and grain processing industries. Their self-aligning capability makes them suitable for long shafts subject to deflection, or for assemblies where perfect alignment between supports cannot be guaranteed.

For correct selection, consider radial and axial load, rotational speed and environmental conditions. The /C3 suffix indicates greater radial clearance, recommended when there is interference fit or thermal gradients between shaft and housing. Lubrication must be chosen according to temperature and contamination: grease for general applications or oil in centralized systems. Mounting requires cleanliness, alignment verification and proper adjustment; poor practice can reduce service life. The CC steel cage is robust and suitable for most environments.

Regarding equivalents, spherical roller bearings are manufactured under international standards that allow interchanging main dimensions between different brands. However, internal suffixes may vary: the same basic number may have different cage designs, clearance or heat treatment depending on the manufacturer. Therefore, when replacing a bearing, the basic number alone is not enough; you must verify that the suffixes match or are compatible. MR Accesorios Industriales can advise you with the complete designation.

If you need to replace a spherical roller bearing, send the complete code via WhatsApp to MR Accesorios Industriales. With the basic number and suffixes we can identify the exact variant and offer you an equivalent alternative. Do not improvise with incomplete codes: a precise designation prevents downtime and ensures the correct operation of your equipment. Write to us and we will respond promptly.

Dimensions

Boundary dimensions of the basic designation 21306 per ISO 15: 30 x 72 x 19 mm (d x D x B).

Bore
30mm
Outside diameter (D)
72mm
Width (B)
19mm

The same size in other brands

Pages from other brands with the basic designation 21306: 30 x 72 x 19 mm (d x D x B) per ISO 15.

They share the boundary dimensions set by ISO 15, not the technical data: seals or shields, internal clearance, cage and load rating can differ by brand and suffix. We quote each one by its full part number.

Frequently Asked Questions

What are the dimensions of the SKF 21306 CC/C3 bearing?
The SKF 21306 CC/C3 bearing has a 30 mm bore, a 72 mm outside diameter and a 19 mm width (30 x 72 x 19 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 21306.
What does the CC suffix mean on an SKF bearing?
The CC suffix indicates that the bearing has a stamped steel cage of specific design, which guides the rollers and withstands loads. It is a common configuration in spherical roller bearings for general applications.
What is the C3 radial clearance for?
The C3 clearance is greater than standard and is used when interference fit or thermal differences reduce internal clearance. This prevents the bearing from operating preloaded and extends its service life.
How do I request a quote for SKF spherical roller bearings?
Send the complete code via WhatsApp to MR Accesorios Industriales, for example 22324 CC/C3. With that information we will provide a quote without obligation.
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