SKF 3309 ENR/C3 double row angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Double row angular contact ball bearings
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Decoding SKF 3309 ENR/C3
- 33Series
- Double row angular contact ball bearings, 33 series. Series differ in outside diameter and width even when the bore is the same.
- 09Bore
- Bore 45 mm (09 × 5).
- ENR/C3Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
3309 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 3309 ENR/C3 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 39.7 mm (45 x 100 x 39.7 mm).
SKF 3309 ENR/C3 belongs to double row angular contact 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 3309 ENR/C3 and any equivalents.
The SKF double row angular contact bearing handles radial and axial forces in both directions. Two rows of balls run on inclined raceways, so the bearing also copes with tilting moments and combined loads. This makes it a good fit where high rigidity and precision are needed, and it lets you replace two single row bearings with one support for a simpler assembly design.
The part code tells you what you are getting. Take 3309 ENR/C3: the leading digits give the type and dimension series, ENR covers internal features such as raceway geometry or contact angle, and C3 means internal radial clearance is larger than normal. Reading these characters correctly is the first step in matching a bearing to the job.
You will find this design in gearboxes, pumps, fans, machine tools and power transmission equipment, across sectors such as metallurgy, food processing, cement and mining. Because it takes load in two directions, it suits applications with load reversal or moments, including milling spindles and roller shafts.
When selecting, look at load size and direction, rotation speed and the surrounding environment. Sealing keeps lubricant in and contaminants out, so pick the seal type to match the site. Internal clearance should suit the working temperature and the mounting fit. Good lubrication and accurate alignment help the bearing reach its expected service life.
Other brands offer equivalents, but check dimensions and load ratings before swapping. Suffixes do not always mean the same thing from one maker to another, so it pays to have a specialist review the interchange. MR Industrial Accessories can advise on equivalents and confirm the replacement fits your application.
To get a quote, send the complete code by WhatsApp or email to MR Industrial Accessories. The team replies promptly, suggests equivalents where needed and helps you choose the right bearing for your equipment.
Dimensions
45 x 100 x 39.7 mm (d x D x B): boundary dimensions for basic designation 3309, according to ISO 15.
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 39.7mm
Frequently asked questions
- SKF 3309 ENR/C3 bearing: what are its dimensions?
- SKF 3309 ENR/C3 measures 45 mm across the bore and 100 mm across the outside diameter; its width is 39.7 mm (45 x 100 x 39.7 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 3309.
- What does the C3 suffix mean on a bearing?
- C3 indicates internal radial clearance greater than normal. It is chosen when the bearing runs at elevated temperatures or with mounting fits that reduce clearance, so that excessive preload is avoided.
- Can this bearing support axial loads in both directions?
- Yes. The double row angular contact design carries axial loads in both directions, along with radial loads and moments, which suits applications where load reverses.
- How do I choose between a single row and a double row bearing?
- If axial loads act in two directions or moments are present, the double row version is more compact and rigid. Where load acts in one direction only, a single row bearing may be sufficient.