Ball Bearings

A ball bearing is a rolling bearing used within the power transmission industry which features metal balls between a rotating or oscillating shaft and outer ring. With applications in everything from bicycle wheels to aerospace engineering, ball bearings are designed to reduce rotational friction while supporting radial loads. Incorporating a rolling element that guarantees a low coefficient of friction. Ball bearings ensure smooth and uninterrupted rotation of, for example, an axle or motor shaft.


The only way for a ball bearing to operate efficiently or at high speeds is with the right lubrication which can work at high temperatures. The correct oil or grease lubricant has to be used with each bearing depending on its nominal lifespan and load. For further information about ball bearings and how to decipher the codes on them, see our ball bearings guide.

Ball bearings that spin at high speeds require lubricant and a clean environment. Having the ball bearings shielded offers better protection against dirt and grease, therefore, the ball bearings have a longer lifespan. Sealed ball bearing offer reliability as they reduce the risk of dust and dirt entering the ball bearing mechanism. They also help to preserve the lubricant within the bearing and keep it running smoother, for longer.

Types of Ball Bearings

Ball bearings are used in machines to lessen and transform sliding friction to rolling friction and support radial and axial loads. Ball bearings are available in open and sealed versions, depending on the environmental requirements. They are also available in a range of diameters, supplied in metric sizes. Types include:

  • Deep-groove ball bearings for when higher load capacity is required. Deep Groove refers to the race (the groove where the balls rest). There is therefore a larger space between the inner and outer rings, than the diameter of the ball. This leaves space for the rubber seals.
  • Angular Contact ball bearings
  • Single-row ball bearings are the most common
  • Linear ball bearings
  • Miniature ball bearings
  • Radial deep groove ball bearing
  • Self-aligning ball bearings used with long shafts
  • Thrust ball bearings
  • Ceramic bearings resistant to corrosion and very little lubrication
  • Shielded bearings
  • Double row bearings have two rows
  • Caged bearings secure the balls

Ball bearings are used in objects with moving parts and have many applications. These include quite specific uses such as in computer fans, watches, gearboxes and children's toys as well as:

  • Food and Beverage Industry
  • Pharmaceutica
  • Medical industry
  • Engines and Pumps
  • Motorsports
  • Printing

...
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Description Price Inside Diameter Outside Diameter Ball Bearing Type Race Width End Type Flange Outside Diameter Number of Rows Static Load Rating Material Ball Material Cage Material Race Material Race Type Dynamic Load Rating
RS Stock No. 618-9957
Mfr. Part No.608-2RS
BrandRS PRO
€2.41
Each
units
8mm 22mm Miniature 7mm Sealed - 1 1.379kN Steel - - - Plain 3.293kN
RS Stock No. 441-9969
Mfr. Part No.6000-2RSH
BrandSKF
€5.50
Each
units
10mm 26mm Deep Groove 8mm Sealed - 1 1.96kN Steel - Steel - Plain 4.75kN
RS Stock No. 619-0014
Mfr. Part No.626-2Z
BrandRS PRO
€2.41
Each
units
6mm 19mm Miniature 6mm Shielded - 1 896N Steel - - - Plain 2.336kN
RS Stock No. 286-7546
Mfr. Part No.608-2Z
BrandSKF
€4.64
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel Steel Steel Steel Plain 3.45kN
RS Stock No. 408-9883
Mfr. Part No.608ZZ1MC3E
BrandNSK
€4.56
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel - Steel - Plain 3.3kN
RS Stock No. 612-5824
Mfr. Part No.DDL-1360ZZMTRA1P24LY121
BrandNMB
€11.93
1 Pack of 2
Pack(s)
6mm 13mm Radial 5mm Shielded - 1 438N Steel Martensitic Stainless Steel Metallic Ribbon Steel Martensitic Stainless Steel Plain 1.083kN
RS Stock No. 612-5745
Mfr. Part No.DDL-730ZZHA1P25LY121
BrandNMB
€7.44
1 Pack of 2
Pack(s)
3mm 7mm Radial 3mm Shielded - 1 129N Steel Martensitic Stainless Steel Metallic Crown Steel Martensitic Stainless Steel Plain 384N
RS Stock No. 747-787
Mfr. Part No.DDR-1560ZZMTP24LY121
BrandNMB
€11.63
1 Pack of 2
Pack(s)
6mm 15mm Radial 5mm Shielded - 1 671N Steel Martensitic Stainless Steel - Martensitic Stainless Steel Plain 1.735kN
RS Stock No. 441-9975
Mfr. Part No.6001-2RSH
BrandSKF
€5.89
Each
units
12mm 28mm Deep Groove 8mm Sealed - 1 2.36kN Steel Steel Steel Steel Plain 5.4kN
RS Stock No. 123-4828
Mfr. Part No.6205-2Z/C3GJN
BrandSKF
€15.30
Each
units
25mm 52mm Deep Groove 15mm Shielded - 1 7.8kN Steel Ceramic Steel - Plain 14.8kN
RS Stock No. 442-0183
Mfr. Part No.6201-2RSH
BrandSKF
€5.71
Each
units
12mm 32mm Deep Groove 10mm Sealed - 1 3.1kN Steel - Steel - Plain 7.28kN
RS Stock No. 764-3538
Mfr. Part No.6012-2RS1
BrandSKF
€32.58
Each
units
60mm 95mm Deep Groove 18mm Sealed - 1 23.2kN Steel - Steel - Plain 30.7kN
RS Stock No. 409-0619
Mfr. Part No.6210
BrandNSK
€20.52
Each
units
50mm 90mm Deep Groove 20mm Open - 1 23.2kN Steel - Steel - Plain 35kN
RS Stock No. 747-765
Mfr. Part No.DDL1150ZZMTRA5P24LY121
BrandNMB
€9.93
1 Pack of 2
Pack(s)
5mm 11mm Radial 5mm Shielded - 1 276N Steel Martensitic Stainless Steel - Martensitic Stainless Steel Plain 714N
RS Stock No. 746-324
Mfr. Part No.KLNJ3/8-2ZRY
BrandNSK-RHP
€17.14
Each
units
9.52mm 22.22mm Deep Groove 7.14mm Shielded - 1 1.41kN Steel - - - Plain 3.46kN
RS Stock No. 540-283
Mfr. Part No.DDLF-1260ZZP24LY121
BrandNMB
€16.45
1 Pack of 2
Pack(s)
6mm 12mm Radial 4mm Shielded 13.2mm 1 363N Steel Martensitic Stainless Steel - Martensitic Stainless Steel Flanged 831N
RS Stock No. 612-5751
Mfr. Part No.DDL-740ZZHA3P25LY121
BrandNMB
€8.70
1 Pack of 2
Pack(s)
4mm 7mm Radial 2.5mm Shielded - 1 106N Steel Martensitic Stainless Steel Metallic Crown Steel Martensitic Stainless Steel Plain 250N
RS Stock No. 441-9953
Mfr. Part No.608-2RSH
BrandSKF
€5.13
Each
units
8mm 22mm Deep Groove 7mm Sealed - 1 1.37kN Steel - Steel - Plain 3.45kN
RS Stock No. 619-0345
Mfr. Part No.6004-2RS
BrandRS PRO
€3.42
Each
units
20mm 42mm Deep Groove 12mm Sealed - 1 5kN Steel - - - Plain 9.63kN
RS Stock No. 619-0143
Mfr. Part No.6201-2RS
BrandRS PRO
€2.90
Each
units
12mm 32mm Deep Groove 10mm Sealed - 1 3.1kN Steel - - - Plain 6.89kN