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. 667-1030
Mfr. Part No.608-2Z/C3
BrandSKF
$9.15
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel - Steel - Plain 3.45kN
RS Stock No. 442-0076
Mfr. Part No.6203-2RSH
BrandSKF
$14.18
Each
units
17mm 40mm Deep Groove 12mm Sealed - 1 4.75kN Steel - Steel - Plain 9.95kN
RS Stock No. 618-9957
Mfr. Part No.608-2RS
BrandRS PRO
$4.60
Each
units
8mm 22mm Miniature 7mm Sealed - 1 1.379kN Steel - - - Plain 3.293kN
RS Stock No. 619-0317
Mfr. Part No.6203-2RS
BrandRS PRO
$7.30
Each
units
17mm 40mm Deep Groove 12mm Sealed - 1 4.75kN Steel - - - Plain 9.56kN
RS Stock No. 893-7323
Mfr. Part No.SS608-2RS
BrandRS PRO
$6.47
Each
units
8mm 22mm Deep Groove 7mm Sealed - 1 882N Stainless Steel - - - Plain 2.111kN
RS Stock No. 619-0036
Mfr. Part No.608-2Z
BrandRS PRO
$4.60
Each
units
8mm 22mm Miniature 7mm Shielded - 1 1.379kN Steel - - - Plain 3.293kN
RS Stock No. 441-9975
Mfr. Part No.6001-2RSH
BrandSKF
$12.21
Each
units
12mm 28mm Deep Groove 8mm Sealed - 1 2.36kN Steel Steel Steel Steel Plain 5.4kN
RS Stock No. 618-9884
Mfr. Part No.623-2Z
BrandRS PRO
$3.95
Each
units
3mm 10mm Miniature 4mm Shielded - 1 219N Steel - - - Plain 631N
RS Stock No. 138-613
Mfr. Part No.608SSA1M2MTLY121
BrandNMB
$6.615
Each (In a Pack of 2)
units
8mm 22mm - 7mm Sealed - 1 1.368kN Steel Chromium Steel Chromium Steel Chromium Steel Plain 3.297kN
RS Stock No. 619-0323
Mfr. Part No.6804-2RS
BrandRS PRO
$8.94
Each
units
20mm 32mm Deep Groove 7mm Sealed - 1 1.5kN Steel - - - Plain 2.7kN
RS Stock No. 893-7313
Mfr. Part No.SS606-2RS
BrandRS PRO
$7.14
Each
units
6mm 17mm Deep Groove 6mm Sealed - 1 604.8kN Stainless Steel - - - Plain 1627.2kN
RS Stock No. 619-0452
Mfr. Part No.6805-2RS
BrandRS PRO
$10.13
Each
units
25mm 37mm Deep Groove 7mm Sealed - 1 2.6kN Steel - - - Plain 4.36kN
RS Stock No. 409-0401
Mfr. Part No.6202ZZ
BrandNSK
$12.37
Each
units
15mm 35mm Deep Groove 11mm Shielded - 1 3.75kN Steel Steel Steel Steel Plain 7.65kN
RS Stock No. 442-0105
Mfr. Part No.6205-2RSH
BrandSKF
$18.73
Each
units
25mm 52mm Deep Groove 15mm Sealed - 1 7.8kN Steel - Steel - Plain 14.8kN
RS Stock No. 619-0159
Mfr. Part No.6802-2RS
BrandRS PRO
$6.77
Each
units
15mm 24mm Deep Groove 5mm Sealed - 1 800N Steel - - - Plain 1.56kN
RS Stock No. 618-9935
Mfr. Part No.627-2RS
BrandRS PRO
$5.25
Each
units
7mm 22mm Miniature 7mm Sealed - 1 1.379kN Steel - - - Plain 3.287kN
RS Stock No. 441-9969
Mfr. Part No.6000-2RSH
BrandSKF
$11.63
Each
units
10mm 26mm Deep Groove 8mm Sealed - 1 1.96kN Steel - Steel - Plain 4.75kN
RS Stock No. 286-7978
Mfr. Part No.6203
BrandSKF
$11.33
Each
units
17mm 40mm Deep Groove 12mm Open - 1 4.75kN Steel - Steel - Plain 9.95kN
RS Stock No. 505-867
Mfr. Part No.4203 ATN9
BrandSKF
$61.55
Each
units
17mm 40mm Deep Groove 16mm Open - 2 9.5kN Steel - Fibreglass Reinforced PA - Plain 14.8kN
RS Stock No. 619-0121
Mfr. Part No.6001-2RS
BrandRS PRO
$5.63
Each
units
12mm 28mm Deep Groove 8mm Sealed - 1 2.36kN Steel - - - Plain 5.07kN