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. 540-312
Mfr. Part No.DDLF1910ZZRA5P24LY121
BrandNMB
$20.835
Each (In a Pack of 2)
units
10mm 19mm Radial 7mm Shielded 22mm 1 - Steel Martensitic Stainless Steel - Martensitic Stainless Steel Flanged 2.123kN
RS Stock No. 893-7477
Mfr. Part No.SS61903-2RS
BrandRS PRO
$15.74
Each
units
17mm 30mm Deep Groove 7mm Sealed - 1 2.08kN Stainless Steel - - - Plain 3.68kN
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. 408-9883
Mfr. Part No.608ZZ1MC3E
BrandNSK
$9.35
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel - Steel - Plain 3.3kN
RS Stock No. 619-0654
Mfr. Part No.6205-2Z
BrandRS PRO
$8.88
Each
units
25mm 52mm Deep Groove 15mm Shielded - 1 7.8kN Steel - - - Plain 14kN
RS Stock No. 619-0418
Mfr. Part No.6204-2Z
BrandRS PRO
$7.90
Each
units
20mm 47mm Deep Groove 14mm Shielded - 1 6.55kN Steel - - - Plain 12.7kN
RS Stock No. 408-9760
Mfr. Part No.625-2RS
BrandNSK
$8.10
Each
units
5mm 16mm Deep Groove 5mm Sealed - 1 670N Steel - Steel - Plain 1.73kN
RS Stock No. 619-0171
Mfr. Part No.6002-2RS
BrandRS PRO
$5.78
Each
units
15mm 32mm Deep Groove 9mm Sealed - 1 2.85kN Steel - - - Plain 5.59kN
RS Stock No. 492-2099
Mfr. Part No.6800ZZ
BrandNSK
$21.44
Each
units
10mm 19mm Deep Groove 5mm Shielded - 1 840N Steel - Steel - Plain 1.72kN
RS Stock No. 286-7811
Mfr. Part No.625
BrandSKF
$6.56
Each
units
5mm 16mm Deep Groove 5mm Open - 1 380N Steel - Steel - Plain 1.14kN
RS Stock No. 505-873
Mfr. Part No.6312/C3
BrandSKF
$132.93
Each
units
60mm 130mm Deep Groove 31mm Open - 1 52kN Steel - Steel - Plain 85.2kN
RS Stock No. 285-1535
Mfr. Part No.7203 BEP
BrandSKF
$47.93
Each
units
17mm 40mm Angular Contact 12mm Open - 1 5.5kN Steel - Fibreglass Reinforced Nylon 66 - Plain 10.4kN
RS Stock No. 619-0345
Mfr. Part No.6004-2RS
BrandRS PRO
$6.50
Each
units
20mm 42mm Deep Groove 12mm Sealed - 1 5kN Steel - - - Plain 9.63kN
RS Stock No. 442-0082
Mfr. Part No.6202-2RSH
BrandSKF
$12.71
Each
units
15mm 35mm Deep Groove 11mm Sealed - 1 3.75kN Steel - Steel - Plain 8.06kN
RS Stock No. 409-0439
Mfr. Part No.6203ZZ
BrandNSK
$12.24
Each
units
17mm 40mm Deep Groove 12mm Shielded - 1 4.8kN Steel - Steel - Plain 9.55kN
RS Stock No. 619-0446
Mfr. Part No.6005-2RS
BrandRS PRO
$8.94
Each
units
25mm 47mm Deep Groove 12mm Sealed - 1 6.55kN Steel - - - Plain 11.2kN
RS Stock No. 505-659
Mfr. Part No.6316/C3
BrandSKF
$368.72
Each
units
80mm 170mm Deep Groove 39mm Open - 1 86.5kN Steel - Steel - Plain 130kN
RS Stock No. 409-0467
Mfr. Part No.6204ZZ
BrandNSK
$13.93
Each
units
20mm 47mm Deep Groove 14mm Shielded - 1 6.6kN Steel - Steel - Plain 12.8kN
RS Stock No. 893-0277
Mfr. Part No.W604-2RS1
BrandSKF
$19.63
Each
units
4mm 12mm Deep Groove 4mm Sealed - 1 176N Stainless Steel Stainless Steel Stainless Steel Stainless Steel Plain 540N
RS Stock No. 667-1140
Mfr. Part No.6005-2RSH/C3
BrandSKF
$16.79
Each
units
25mm 47mm Deep Groove 12mm Sealed - 1 6.55kN Steel - Steel - Plain 11.9kN