The Deep Groove Ball Bearing, known as 61905-2RS-SKF SKF, has an inner diameter of 25 mm, an outer diameter of 42 mm and a thickness of 9 mm.

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 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.

SKF single and double row deep groove ball bearings have deep, uninterrupted raceway grooves. These raceway grooves have a close osculation with the balls, enabling the bearings to accommodate radial loads and axial loads in both directions.Single row deep groove ball bearings are available open or capped (with seals or shields).Double row deep groove ball bearings are only available as open bearings (without seals or shields).

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".

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.

Deep groove ball bearings are versatile. They are simple in design, non-separable, suitable for high speeds and are robust in operation, requiring little maintenance. Because deep groove ball bearings are the most widely used bearing type, they are available from SKF in many designs, variants and sizes.

Deep groove ball bearings are versatile. They are simple in design, non-separable, suitable for high speeds and are robust in operation, requiring little maintenance. Because deep groove ball bearings are the most widely used bearing type, they are available from SKF in many designs, variants and sizes.

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.

Image

2RS1 - Contact seal, NBR, on one or both sides2Z - Shield on one or both sidesC3 - Radial internal clearance greater than normal2RZ - Non-contact seal, NBR, on one or both sides

The Deep Groove Ball Bearing, known as 61905-2RS-SKF SKF, has an inner diameter of 25 mm, an outer diameter of 42 mm and a thickness of 9 mm.

Image

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 61905-2RS-SKF SKF, has an inner diameter of 25 mm, an outer diameter of 42 mm and a thickness of 9 mm.

Image

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".

SKF single and double row deep groove ball bearings have deep, uninterrupted raceway grooves. These raceway grooves have a close osculation with the balls, enabling the bearings to accommodate radial loads and axial loads in both directions.Single row deep groove ball bearings are available open or capped (with seals or shields).Double row deep groove ball bearings are only available as open bearings (without seals or shields).

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.

2RS1 - Contact seal, NBR, on one or both sides2Z - Shield on one or both sidesC3 - Radial internal clearance greater than normal2RZ - Non-contact seal, NBR, on one or both sides