Single Row Ball Bearings

Single row deep groove ball bearings, commonly known as ‘popular metrics’, are rigid non-separable radial bearings and are by far the most popular bearing type. Used in a wide range of applications from agricultural equipment to printing machinery, they are designed to carry both axial and radial loads, are superior in speed rating to any other type of rolling element bearings.

Due to the versatility of applications, single row ball bearings are among the most frequently used types of rolling bearings. They are made as non-separable without a filling slot. Simple design predetermines them for a wide range of operating conditions. They are provided with deep grooves in rings, diameters of which are just a little bigger than those of balls. Due to big ball diameters and high attachment, single row ball bearings feature relatively high dynamic load capacity in both radial and axial directions. Therefore they suit well combined load in both directions. In order to capture axial forces in high revolutions they conveniently substitute axial ball bearings.

Main dimensions
With the exception of E and BO type separable single row ball bearings, main dimensions comply with the standard ISO 15. Dimensions of grooves for snap rings comply with the ISO 464 standard.

Uncovered bearings in standard version
Single row ball bearings in standard version are uncovered and without seals. For manufacturing reasons, also bearings with grooves for shields or seals may get among the standard version of these bearings. Use of these bearings does not require any special provisions.

Bearings with shields and seals
Part of the ball bearing assortment is produced as non-separable bearings with cover sheets, or with contact seal on one or both sides.

Depending on the design series and size, bearings are supplied filled with standard grease. The standard grease used is not stated in the bearing identification. Grease fills about 25 to 35 % of the free bearing space. Supply of bearings with other than grease would need to be agreed with BTL-UK.

Bearings with shields
Single row ball bearings with cover sheets have an additional identification Z, 2Z, ZR or 2ZR. Covered bearings are mostly used to be seated with rotary inner ring. Rotation of outer ring represents a risk of leak of grease in higher revolutions. Cover sheets are made of steel plate. They are seated firmly in outer ring. In Z or 2Z version, cover sheet is embedded in the inner ring recess; ZR or 2ZR variants have cover sheet overlapping a bit above the edge of the inner ring.

Bearings with contact seals
Bearings with contact seal are designated by RS, 2RS, RSR or 2RSR identification, depending on the design series and size of the bearing. Seals are pressed in the outer ring recess, and ensure reliable sealing in given position, without outer ring deformation. In extreme conditions, e.g. at high temperatures or revolutions, grease on inner ring might leak. In locations where such lubricant leak is undesirable, different design solution has to be chosen. In these cases we recommend that you contact the BTL-UK technical and consultancy services. Bearings versions with additional identification RS or 2RS are provided with a seal the tip of which leans on the recess on the inner ring front. The RSR or 2RSR versions have seals the tip of which leans on the cylindrical surface of the inner ring flange.

Please fill in the form below to get your single row ball bearings catalogue.

Should you require further information please feel free to call: 01233 663340