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. 618-9862
Mfr. Part No.624-2RS
BrandRS PRO
HK$18.52
Each
units
4mm 13mm Miniature 5mm Sealed - 1 488N Steel - - - Plain 1.301kN
RS Stock No. 409-0439
Mfr. Part No.6203ZZ
BrandNSK
HK$52.85
Each
units
17mm 40mm Deep Groove 12mm Shielded - 1 4.8kN Steel - Steel - Plain 9.55kN
RS Stock No. 408-9883
Mfr. Part No.608ZZ1MC3E
BrandNSK
HK$40.10
Each
units
8mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel - Steel - Plain 3.3kN
RS Stock No. 747-759
Mfr. Part No.DDL-950ZZHA5P24LY121
BrandNMB
HK$56.125
Each (In a Pack of 2)
units
5mm 9mm Radial 3mm Shielded - 1 207N Steel Martensitic Stainless Steel Metallic Crown Steel Martensitic Stainless Steel Plain 495N
RS Stock No. 612-6136
Mfr. Part No.609SSM3MTLY121
BrandNMB
HK$18.245
Each (In a Pack of 2)
units
9mm 24mm - 7mm Shielded - - 1.368kN Steel - - - Plain 3.297kN
RS Stock No. 409-0798
Mfr. Part No.3204BTNG
BrandNSK
HK$260.95
Each
units
20mm 47mm Angular Contact 20.6mm Open - 2 12.5kN Steel - Polyamide - Plain 19.6kN
RS Stock No. 667-1116
Mfr. Part No.6308-2Z/C3
BrandSKF
HK$252.94
Each
units
40mm 90mm Deep Groove 23mm Shielded - 1 24kN Steel - Steel - Plain 42.3kN
RS Stock No. 109-832
Mfr. Part No.CM608/4N/D
BrandBNL
HK$73.87
Each
units
8mm 22mm Radial 7mm Open - 1 - Plastic Stainless Steel Acetal Acetal Plain -
RS Stock No. 408-8436
Mfr. Part No.6304DDU
BrandNSK
HK$86.83
Each
units
20mm 52mm Deep Groove 15mm Sealed - 1 7.9kN Steel - Steel - Plain 15.9kN
RS Stock No. 667-1194
Mfr. Part No.6207-2RS1/C3
BrandSKF
HK$140.83
Each
units
35mm 72mm Deep Groove 17mm Sealed - 1 15.3kN Steel - Steel - Plain 27kN
RS Stock No. 540-384
Mfr. Part No.DDRF830ZZRA5P24LY121
BrandNMB
HK$64.735
Each (In a Pack of 2)
units
3mm 8mm Radial 4mm Shielded 9.5mm 1 176N Steel Martensitic Stainless Steel Metallic Ribbon Steel Martensitic Stainless Steel Flanged 553N
RS Stock No. 286-7530
Mfr. Part No.608
BrandSKF
HK$35.24
Each
units
8mm 22mm Deep Groove 7mm Open - 1 1.37kN Steel - Steel - Plain 3.45kN
RS Stock No. 505-766
Mfr. Part No.7311BEP
BrandSKF
HK$813.89
Each
units
55mm 120mm Angular Contact 29mm Open - 1 55kN Steel - Fibreglass Reinforced Nylon 66 - Plain 79.3kN
RS Stock No. 408-9849
Mfr. Part No.627ZZ
BrandNSK
HK$39.44
Each
units
7mm 22mm Deep Groove 7mm Shielded - 1 1.37kN Steel - Steel - Plain 3.3kN
RS Stock No. 286-7681
Mfr. Part No.6006
BrandSKF
HK$66.47
Each
units
30mm 55mm Deep Groove 13mm Open - 1 8.3kN Steel - Steel - Plain 13.8kN
RS Stock No. 619-0323
Mfr. Part No.6804-2RS
BrandRS PRO
HK$41.03
Each
units
20mm 32mm Deep Groove 7mm Sealed - 1 1.5kN Steel - - - Plain 2.7kN
RS Stock No. 286-7833
Mfr. Part No.626
BrandSKF
HK$24.26
Each
units
6mm 19mm Deep Groove 6mm Open - 1 950N Steel - Steel - Plain 2.34kN
RS Stock No. 505-996
Mfr. Part No.6314/C3
BrandSKF
HK$1,014.33
Each
units
70mm 150mm Deep Groove 35mm Open - 1 68kN Steel - Steel - Plain 111kN
RS Stock No. 893-7275
Mfr. Part No.SS6004-2RS
BrandRS PRO
HK$69.26
Each
units
20mm 42mm Deep Groove 12mm Sealed - 1 4.545kN Stainless Steel - - - Plain 8.46kN
RS Stock No. 285-0790
Mfr. Part No.623
BrandSKF
HK$32.26
Each
units
3mm 10mm Deep Groove 4mm Open - 1 180N - - Steel - Plain 540N
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