SKF 3311 A-2ZTN9/C3VT113 double row angular contact ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Double row angular contact ball bearings
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Decoding SKF 3311 A-2ZTN9/C3VT113
- 33Series
- Double row angular contact ball bearings, 33 series. Series differ in outside diameter and width even when the bore is the same.
- 11Bore
- Bore 55 mm (11 × 5).
- A-2ZTN9/C3VT113Suffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
3311 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 3311 A-2ZTN9/C3VT113 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 49.2 mm (55 x 120 x 49.2 mm).
SKF 3311 A-2ZTN9/C3VT113 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 3311 A-2ZTN9/C3VT113 and any equivalents.
SKF double row angular contact ball bearings handle radial and axial loads in both directions. Two rows of balls in angular contact give them a higher load capacity than a single row bearing while keeping a compact section. They suit applications that call for high rigidity and precision, such as machine tools, pumps and gearboxes. MR Industrial Accessories supplies this line within its range of SKF bearings.
The part number tells you what you are getting. Take 3304 A-2ZTN9/C3VT113: the leading digits cover size and series (33 means double row), A marks an optimized internal design, 2Z means two shield plates, TN9 is a polyamide cage, C3 is increased internal radial clearance, and VT113 refers to a special grease and protection. Suffixes change from one part number to another, so reading them correctly is the first step in selecting the right bearing.
You will find these bearings in centrifugal pumps, compressors, industrial fans, conveyor belts and machine tools. Metallurgy, food, petrochemical and cement plants use them as well. Combined load capacity and rigidity make them a fit for equipment that runs with precision and reliability under demanding conditions.
Selection depends on the radial and axial load, the rotation speed and the environment. Sealing (2Z or 2RS) keeps contaminants out; pick according to dust or moisture exposure. Internal clearance (C3, C4) offsets thermal expansion. Lubrication and accurate alignment of shaft and housing are what let the bearing reach its service life, so follow the manufacturer's instructions for mounting and lubrication.
SKF double row angular contact bearings can be interchanged with other brands that use the same dimensional and suffix designation. Tolerances and internal clearance may differ between manufacturers, so check them. For a replacement, ask a specialist to confirm compatibility and performance in the specific application.
For a quote or help with a designation, send the full part number by WhatsApp to MR Industrial Accessories. Our technical team helps you choose the right SKF bearing for your equipment.
Dimensions
55 x 120 x 49.2 mm (d x D x B): boundary dimensions for basic designation 3311, according to ISO 15.
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 49.2mm
Frequently asked questions
- SKF 3311 A-2ZTN9/C3VT113 bearing: what are its dimensions?
- SKF 3311 A-2ZTN9/C3VT113 measures 55 mm across the bore and 120 mm across the outside diameter; its width is 49.2 mm (55 x 120 x 49.2 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 3311.
- What does the C3 suffix mean in these bearings?
- C3 indicates greater internal radial clearance than standard. It is used when the bearing runs at high temperatures or with interference fits, to compensate for expansion and avoid excessive preload.
- What is the difference between 2Z and 2RS?
- 2Z is metal shield plates, suitable for environments with coarse dust. 2RS is rubber seals, which seal better against moisture and fine particles. The choice depends on contamination conditions.
- Can I replace an SKF bearing with another brand?
- Yes, as long as the main dimensions and internal clearance match. Tolerances and materials may vary, so it is advisable to verify the equivalence with a specialist before installing.