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.


Types of Ball Bearings


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

  • 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.


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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. 286-8527
Mfr. Part No.51105
BrandSKF
R 256.13
Each
units
25mm 42mm Thrust 11mm - - 1 32kN Steel Steel Pressed Steel - Plain 16kN
RS stock no. 893-7367
Mfr. Part No.SS6205-2RS
BrandRS PRO
R 222.77
Each
units
25mm 52mm Deep Groove 15mm Sealed - 1 7.065kN Stainless Steel - - - Plain 12.6kN
RS stock no. 619-0109
Mfr. Part No.6801-2RS
BrandRS PRO
R 40.17
Each
units
12mm 21mm Deep Groove 5mm Sealed - 1 670N Steel - - - Plain 1.43kN
RS stock no. 505-647
Mfr. Part No.6319/C3
BrandSKF
R 4,423.23
Each
units
95mm 200mm Deep Groove 45mm Open - 1 118kN Steel - Steel - Plain 159kN
RS stock no. 540-334
Mfr. Part No.DDRF1350ZZMTRA5P24LY121
BrandNMB
R 117.90
Each (In a Pack of 2)
units
5mm 13mm Radial 4mm Shielded 15mm 1 422N Steel Martensitic Stainless Steel Metallic Ribbon Steel Martensitic Stainless Steel Flanged 1.074kN
RS stock no. 497-0521
Mfr. Part No.6304-2RS1
BrandSKF
R 144.06
Each
units
20mm 52mm Deep Groove 15mm Sealed - 1 7.8kN Steel - Steel - Plain 16.8kN
RS stock no. 747-816
Mfr. Part No.DDL1680HHMTRA5P24LY121
BrandNMB
R 105.60
Each (In a Pack of 2)
units
8mm 16mm Radial 5mm Shielded - 1 712N Steel Martensitic Stainless Steel Metallic Ribbon Steel Martensitic Stainless Steel Plain 1.606kN
RS stock no. 619-0531
Mfr. Part No.6008-2RS
BrandRS PRO
R 135.65
Each
units
40mm 68mm Deep Groove 15mm Sealed - 1 11.6kN Steel - - - Plain 16.8kN
RS stock no. 893-7427
Mfr. Part No.SS6306-2RS
BrandRS PRO
R 550.12
Each
units
30mm 72mm Deep Groove 19mm Sealed - 1 13.5kN Stainless Steel - - - Plain 24.03kN
RS stock no. 505-772
Mfr. Part No.7309BEP
BrandSKF
R 957.53
Each
units
45mm 100mm Angular Contact 25mm Open - 1 37.5kN Steel - Fibreglass Reinforced Nylon 66 - Plain 55.9kN
RS stock no. 618-9979
Mfr. Part No.6800-2RS
BrandRS PRO
R 38.40
Each
units
10mm 19mm Deep Groove 5mm Sealed - 1 585N Steel - - - Plain 1.38kN
RS stock no. 893-7360
Mfr. Part No.SS6204-2RS
BrandRS PRO
R 170.60
Each
units
20mm 47mm Deep Groove 14mm Sealed - 1 5.985kN Stainless Steel - - - Plain 11.52kN
RS stock no. 492-2178
Mfr. Part No.623ZZ
BrandNSK
R 72.89
Each
units
3mm 10mm Deep Groove 4mm Shielded - 1 218N Steel - Steel - Plain 630N
RS stock no. 618-9856
Mfr. Part No.623-2RS
BrandRS PRO
R 31.57
Each
units
3mm 10mm Miniature 4mm Sealed - 1 219N Steel - - - Plain 631N
RS stock no. 893-0274
Mfr. Part No.W6306-2RS1
BrandSKF
R 2,310.96
Each
units
30mm 72mm Deep Groove 19mm Sealed - 1 15kN Stainless Steel Stainless Steel Stainless Steel Stainless Steel Plain 22.9kN
RS stock no. 123-4819
Mfr. Part No.608-2Z/C3GJN
BrandSKF
R 113.51
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.4kN Steel Ceramic Steel - Plain 3.4kN
RS stock no. 409-0546
Mfr. Part No.6206ZZ
BrandNSK
R 157.95
Each
units
30mm 62mm Deep Groove 16mm Shielded - 1 11.3kN Steel - Steel - Plain 19.5kN
RS stock no. 409-0883
Mfr. Part No.51105
BrandNSK
R 183.93
Each
units
25mm 42mm Thrust 11mm - - 1 37kN Steel - Steel - Plain 19.7kN
RS stock no. 409-0057
Mfr. Part No.6001ZZ
BrandNSK
R 78.64
Each
units
12mm 28mm Deep Groove 8mm Shielded - 1 2.37kN Steel - Steel - Plain 5.1kN
RS stock no. 505-788
Mfr. Part No.7307BEP
BrandSKF
R 534.50
Each
units
35mm 80mm Angular Contact 21mm Open - 1 24.5kN Steel - Fibreglass Reinforced Nylon 66 - Plain 39kN