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These suffixes indicate that the cage (the part of the bearing that holds the balls apart) is made of polymer material. Usually made of glass-fiber-reinforced polyamide.

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This suffix indicates that the bearing is designed for very high operating temperatures. In general, the temperature is indicated after this suffix.Beware, these bearings are not suitable for all applications, and will require a high temperature for optimum service life.

These suffixes mean "with 1 or 2 sheet metal deflectors", for dust-tightness. At 123Roulement, we specify whether the bearing is sealed on 2 sides with "ZZ".

A stainless steel bearing is generally magnetizable, as it is made from AISI 420 stainless steel, which is harder and more shock-resistant than standard stainless steel (AISI 304).To check whether your bearing is made of stainless steel, simply read the reference engraved on the side of the bearing. This reference should begin with the prefix "S" meaning "Stainless Steel".

The Deep Groove Ball Bearing, known as 6306-2RS-C3-SKF SKF, has an inner diameter of 30 mm, an outer diameter of 72 mm and a thickness of 19 mm.

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These suffixes mean "with 1 or 2 rubber seals". At 123Roulement, we use the number "2" to specify when the bearing is sealed on both sides.

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The ABEC standard is used to classify bearings according to their machining tolerance. This standard is regularly called into question because it does not include certain technologies that are important for guaranteeing proper operation, both in terms of efficiency and bearing life.123Roulement therefore makes little use of this standard.

Some bearings are available with more or less important variants (high or low internal clearance, special grease, very high temperature, etc.). These variants are systematically indicated by prefixes and suffixes in the part number.For example, the suffix "2RS" means that the bearing is splash-proof, thanks to a sealing flange on both sides of the bearing.The suffix "C3" means that the bearing has increased internal clearance, and will require a higher operating temperature, or a higher rotation speed.

The Deep Groove Ball Bearing, known as 6306-2RS-C3-SKF SKF, has an inner diameter of 30 mm, an outer diameter of 72 mm and a thickness of 19 mm.

Shielded 6310-ZC3 Ball Bearing manufactured by SKF with an inside diameter of 50mm, an outside diameter of 110mm, and a width of 27mm.Shielded Bearings have metal seals that connect to the outer race only; this protects the bearing from dust and large solid particles but not from moisture. They are generally used in faster running machines as they have less friction than Rubber Sealed Bearings.**Please note: This bearing has metal shields.C3 bearings have a larger clearance around the balls allowing the bearing to cope better with heat expansion, this means the bearing runs freer and smoother at higher temperatures. C3 Bearings also cope better in start/stop applications, they are found in almost every electric motor produced and are commonly found in washing machines and tumble driersPlease watch this short video for more information,

Means "increased internal clearance". Often referred to as high-speed, this means that the bearing is designed for high rotational speeds and moderately high temperatures. CAUTION: a bearing with increased internal clearance will not operate optimally at low speeds. Please refer to the data sheet for the bearing you are looking for to find out its rotation speed limit.

The Deep Groove Ball Bearing, known as 6306-2RS-C3-SKF SKF, has an inner diameter of 30 mm, an outer diameter of 72 mm and a thickness of 19 mm.