SKF 3311 A-2RS1/C3MT33 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 3311 A-2RS1/C3MT33
- 33Series
- Double row angular contact ball bearings, 33 series. For the same bore, each series has a different outside diameter and width.
- 11Bore
- 55 mm bore: 11 × 5.
- A-2RS1/C3MT33Suffix
- SKF suffix: it defines the variant (sealing, cage, internal clearance or other features).
3311 is the standard (ISO) basic designation: it defines the type, the series and the bore.
Description
The SKF 3311 A-2RS1/C3MT33 bearing has a 55 mm bore, a 120 mm outside diameter and a 49.2 mm width (55 x 120 x 49.2 mm).
SKF 3311 A-2RS1/C3MT33 is a reference of double row angular contact ball bearing, within Bearings. Request a quote for 3311 A-2RS1/C3MT33 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.
SKF series 33 ball bearings are double row angular contact bearings, designed to withstand radial and axial loads in both directions. Their compact and robust construction makes them ideal for applications requiring high rigidity and precision. At MR Accesorios Industriales we sell this series with rubber seals and C3 internal clearance, ready for demanding environments.
The designation of these bearings reads as follows: the basic number, for example 3309, 3310 or 3311, indicates the size and series. The suffix A indicates an optimized internal execution. 2RS1 means double rubber seal on both sides, which retains lubricant and blocks contaminants. C3 indicates an internal radial clearance greater than standard, and MT33 identifies the type of high-quality grease with which they are lubricated from the factory. Thus, a part number such as 3310 A-2RS1/C3MT33 summarizes all these features.
These bearings are used in equipment where combined loads and moderate speeds are common. In Argentine industry you find them in centrifugal pumps, compressors, industrial fans, machine tools and transmission equipment. They also appear in agricultural applications and in conveyors. Their double row and angular contact make them suitable for withstanding axial forces in both directions, something a single row deep groove bearing does not achieve with the same efficiency.
To select the right bearing, take into account the radial and axial load it must withstand, the rotation speed and the environmental conditions. The C3 clearance is recommended when there are thermal differences between shaft and housing, or when greater tolerance is required during assembly. The 2RS1 seals protect against dust and moisture, but if the environment is very dirty or there is water spray, evaluate additional protection. Factory lubrication with MT33 grease covers a wide temperature range, although in severe applications periodic relubrication may be necessary.
When replacing a bearing, verify that the dimensions and clearance match the original. Equivalences between brands exist, but they are not always direct: the same part number can vary in suffixes and performance. It is always advisable to consult a specialist before substituting one brand for another. At MR Accesorios Industriales we can advise you to find the right option for your application.
If you need a quote for these SKF series 33 bearings, send us the complete part number on WhatsApp. We reply with the alternatives that best suit your needs.
Dimensions
Boundary dimensions of the basic designation 3311 per ISO 15: 55 x 120 x 49.2 mm (d x D x B).
- Bore
- 55mm
- Outside diameter (D)
- 120mm
- Width (B)
- 49.2mm
Frequently Asked Questions
- What are the dimensions of the SKF 3311 A-2RS1/C3MT33 bearing?
- The SKF 3311 A-2RS1/C3MT33 bearing has a 55 mm bore, a 120 mm outside diameter and a 49.2 mm width (55 x 120 x 49.2 mm). These are the standardised boundary dimensions (ISO 15) of the basic designation 3311.
- What does the C3 suffix mean on these bearings?
- The C3 suffix indicates an internal radial clearance greater than standard. It is used when there are temperature gradients between shaft and housing, or when greater tolerance is required to facilitate assembly. It does not affect load capacity, but it must be considered in the design.
- Are the 2RS1 seals replaceable?
- No, the 2RS1 seals are an integral part of the bearing and are not designed to be replaced. If they are damaged, it is recommended to replace the complete bearing. For applications requiring inspection or relubrication, there are versions with metal shields (ZZ) or without seals.
- Can I use these bearings at high speeds?
- Yes, but keep in mind that rubber seals generate somewhat more friction than metal shields, which can limit the maximum speed. For high speeds, consult the manufacturer's tables or contact us to evaluate a suitable alternative.