SKF 3309 A-Z/C3 double row angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Double row angular contact ball bearings
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Since 1945 · Martínez, Buenos Aires, Argentina
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How to read SKF 3309 A-Z/C3
- 33Series
- Double row angular contact ball bearings, 33 series. For the same bore, each series has a different outside diameter and width.
- 09Bore
- 45 mm bore: 09 × 5.
- A-Z/C3Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
3309 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 3309 A-Z/C3 bearing has a 45 mm bore, a 100 mm outside diameter and a 39.7 mm width (45 x 100 x 39.7 mm).
SKF 3309 A-Z/C3 is a reference of double row angular contact ball bearing, within Bearings. Request a quote for 3309 A-Z/C3 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
The SKF double row angular contact bearing is a component designed to support combined radial and axial loads in both directions. Its construction with two rows of balls allows higher load capacity than a single row bearing, while maintaining a compact design. It is used in applications requiring high rigidity and precision, such as machine tool spindles, pumps and gearboxes. At MR Accesorios Industriales we supply this line.
The designation of these bearings follows a scheme combining numbers and suffixes. For example, in 3309 A-Z/C3, the first digits indicate the type and dimension series; the letter A indicates an internal design variant, while Z indicates a steel sheet cage. The suffix /C3 specifies an internal radial clearance greater than standard, suitable for applications with elevated temperatures or interference fits. Understanding these codes is key to selecting the correct bearing according to operating conditions.
These bearings are used in industries such as metalworking, food and beverage, mining and petrochemical. In Argentina, they are commonly found in main spindles of milling machines and lathes, process centrifugal pumps, gearboxes and compressors. Their ability to support axial loads in both directions makes them ideal for applications requiring high precision and rigidity, such as high-speed machining equipment or transmission systems combining radial and axial loads.
To correctly select a double row angular contact bearing, it is essential to consider the axial and radial load it must support, as well as rotation speed and environmental conditions. Sealing is a critical aspect: if the environment contains dust or moisture, choosing variants with seals or shields is recommended. Lubrication must be suitable for the working temperature, and mounting requires precise alignment to avoid additional stresses. Internal clearance must be chosen according to the fit and expected thermal expansion.
Regarding equivalents and interchangeability, double row angular contact bearings from different manufacturers may differ in dimensions and load capacity, so they are not always directly interchangeable. It is important to verify technical specifications and suffixes for each brand. SKF, as a brand that MR supplies, offers a wide range of options, but consulting a specialist before replacing one bearing with another of different origin is always recommended.
If you need a quote for an SKF double row angular contact bearing, at MR Accesorios Industriales we advise you. Send us the complete code via WhatsApp and we will respond promptly. We are your trusted partner for industrial components.
Dimensions
Boundary dimensions of the basic designation 3309 per ISO 15: 45 x 100 x 39.7 mm (d x D x B).
- Bore
- 45mm
- Outside diameter (D)
- 100mm
- Width (B)
- 39.7mm
Frequently Asked Questions
- What are the dimensions of the SKF 3309 A-Z/C3 bearing?
- The SKF 3309 A-Z/C3 bearing has a 45 mm bore, a 100 mm outside diameter and a 39.7 mm width (45 x 100 x 39.7 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 3309.
- What does the C3 suffix mean on an SKF bearing?
- The C3 suffix indicates an internal radial clearance greater than standard. It is used when the bearing will operate at elevated temperatures or when mounting fits reduce clearance, thus preventing the bearing from becoming preloaded.
- Does this bearing allow axial loads in both directions?
- Yes, the double row angular contact design allows it to support axial loads in both directions, as well as radial loads. This makes it suitable for applications with combined loads and high rigidity requirements.
- How do I choose between a single row and a double row bearing?
- The double row supports higher axial and radial loads and offers greater rigidity, but is wider. If space is limited or loads are moderate, a single row bearing may be sufficient. Evaluate load and speed conditions.