SKF 2306/C3 self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Other brands for this category
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Decoding SKF 2306/C3
- 23Series
- Self-aligning ball bearings, 23 series. Series differ in outside diameter and width even when the bore is the same.
- 06Bore
- Bore 30 mm (06 × 5).
- C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
2306 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 2306/C3 measures 30 mm across the bore and 72 mm across the outside diameter; its width is 27 mm (30 x 72 x 27 mm).
SKF 2306/C3 belongs to self-aligning 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 2306/C3 and any equivalents.
Self-aligning ball bearings from SKF are made with two rows of balls and a spherical raceway in the outer ring. This construction lets them take radial and axial loads in both directions while absorbing angular misalignment between shaft and housing. They suit equipment where shaft deflection or imperfect mounting cannot be avoided.
Reading the designation helps you pick the right unit. The basic number identifies the series: series 12, as in 1215/C3, is the light-section version, while series 13, as in 1314/C3, has a heavier section. Suffixes describe internal features. The /C3 suffix marks radial internal clearance above standard, which fits tight shaft or housing fits and higher operating temperatures. In 1218/C5 the /C5 suffix calls for even more clearance.
Typical applications include belt conveyors, vibrating screens, mills, mixers and industrial fans, as well as food processing, cement, mining, paper and materials handling operations. Agricultural machinery and power transmission systems working in dusty or damp conditions also use them. The self-aligning behavior is what makes them suitable when shafts bend under load or housings are not perfectly lined up.
Selection depends on radial and axial load, speed and the surrounding environment. Where contamination is present, sealed or shielded versions are the better choice. Internal clearance must match the fit and the working temperature, since too little clearance leads to overheating. Mounting calls for careful initial alignment and proper lubrication, with grease or oil. Keep in mind that permissible misalignment is limited and should not be treated as complete freedom.
Bearings that follow the same standardized dimensions can be interchanged between brands. Even so, confirm the full part number and tolerances, because clearance suffixes and sealing options differ from one maker to another. When replacing a bearing, compare the critical dimensions and let our team review the case.
To get a quote, send the exact part number by WhatsApp or email. If you do not have it, we can identify the bearing from shaft and housing dimensions or from the working conditions, and suggest equivalents.
Dimensions
30 x 72 x 27 mm (d x D x B): boundary dimensions for basic designation 2306, according to ISO 15.
- Bore
- 30mm
- Outside diameter (D)
- 72mm
- Width (B)
- 27mm
Same size, other brands
Other brands' pages with basic designation 2306: 30 x 72 x 27 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 2306/C3 bearing: what are its dimensions?
- SKF 2306/C3 measures 30 mm across the bore and 72 mm across the outside diameter; its width is 27 mm (30 x 72 x 27 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 2306.
- What does /C3 mean on a self-aligning ball bearing?
- It indicates radial internal clearance larger than standard. It is used when the shaft or housing fit is tighter than usual, or when operating temperature is high, so the bearing keeps enough clearance and does not overheat.
- When should I choose a self-aligning ball bearing over a deep groove ball bearing?
- When the shaft and housing are misaligned, or when the shaft deflects under load. A self-aligning bearing absorbs that angular deviation, while a deep groove bearing would pass it on to the raceways.
- How do I request a quote for an SKF bearing?
- Send the complete part number by WhatsApp, for example 1215/C3 or 1316/C3. If you do not have it, tell us the shaft and housing dimensions and the type of load, and we will reply with the reference and technical advice.