Spur Gears

The most common type of gears are spur gears, also known as straight-cut gears, and can be found in a multitude of applications. They have been specifically designed to transmit large amounts of power by placing them on parallel shafts which rotate in opposite directions.Spur gears have an involute profile with straight teeth which project radially and are parallel to the rotation of the axis. This allows for a smoother operation between each gear and permits greater mounting distances. Spur gears can have a central hub or be hubless.The standard pressure angles in spur gears are 14.5, 20 and 25 degrees, and refer to the angle that force is transmitted between the meshing gears.Spur gears are capable of meshing with other gears, with many gears being used to create large gear reductions. When they are meshed the gear with the most teeth is referred to as the gear, whereas the one with smaller teeth is referred to as the pinion.So what are the advantages? High transmission efficiency Compact and very easy to install Constant velocity ratio No slippage – unlike belt drives Highly reliable Can transmit large amounts of powerTypes of spur gearsPlastic spur gears are commonly made from acetal or nylon and have many positive characteristics including being lightweight, non-rusting and quiet. They enable low cost and large production capabilities, and are also able to operate without lubrication. For hygiene reasons, plastic spur gears are an excellent choice for use in industries dealing with food production and medical equipment.Metal spur gears have more strength, load-carrying capacity and heat resilience than their plastic counterpart. They are more dimensionally stable compared to plastic and can be made from many metals such as aluminium, brass and stainless steel.Common applications Metal cutting machines Power plants Marine engines Mechanical clocks and watches Fuel pumps Washing machines Gear motors and gear pumps Rack and pinion mechanisms Material handling equipment Automobile gear boxes Steel mills Rolling millsSpur gears are however very loud and so will not be found in vehicles. When the teeth collide with each other there is an impact noise which is really loud compared to the helical gears found in cars.

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Description Price Module Number of Teeth Material Bore Diameter Hub Diameter Pitch Diameter Face Width
RS Stock No. 521-6216
BrandRS PRO
HK$76.08
Each
units
1 15 Steel 8mm 17mm 15mm 10mm
RS Stock No. 878-7859
BrandRS PRO
HK$97.93
Each
units
0.8 15 Steel 4mm 9.6mm 12mm 6mm
RS Stock No. 521-6610
BrandRS PRO
HK$204.20
Each
units
2 30 Steel 12mm 50mm 60mm 20mm
RS Stock No. 182-7818
BrandRS PRO
HK$142.43
Each
units
1 36 Steel 10mm 25mm 36mm 15mm
RS Stock No. 182-7905
BrandRS PRO
HK$24.14
Each (In a Pack of 3)
units
0.7 25 - 6mm 9mm 17.5mm 6mm
RS Stock No. 521-6345
BrandRS PRO
HK$229.94
Each
units
1 44 Steel 10mm 35mm 44mm 10mm
RS Stock No. 182-7969
BrandRS PRO
HK$60.83
Each
units
1 25 - 6mm 15mm 25mm 9mm
RS Stock No. 182-7966
BrandRS PRO
HK$51.18
Each
units
1 18 - 4mm 9mm 18mm 9mm
RS Stock No. 182-7954
BrandRS PRO
HK$218.23
Each
units
2 35 - 12mm 26mm 70mm 15mm
RS Stock No. 521-6519
BrandRS PRO
HK$345.72
Each
units
1.5 50 Steel 12mm 45mm 75mm 15mm
RS Stock No. 521-7269
BrandRS PRO
HK$25.85
Each
units
0.8 18 POM 4mm 8mm 14.4mm 4mm
RS Stock No. 182-7865
BrandRS PRO
HK$101.39
Each
units
0.7 20 Steel 4mm 10mm 14mm 5mm
RS Stock No. 182-7932
BrandRS PRO
HK$121.18
Each
units
1.5 32 - 10mm 24mm 48mm 12mm
RS Stock No. 182-7888
BrandRS PRO
HK$130.36
Each
units
0.5 32 Steel 4mm 12mm 16mm 4mm
RS Stock No. 521-6373
BrandRS PRO
HK$411.04
Each
units
1 60 Steel 10mm 35mm 60mm 10mm
RS Stock No. 182-7971
BrandRS PRO
HK$67.59
Each
units
1 30 - 6mm 15mm 30mm 9mm
RS Stock No. 182-7894
BrandRS PRO
HK$202.78
Each
units
0.5 48 Steel 5mm 15mm 24mm 4mm
RS Stock No. 182-7949
BrandRS PRO
HK$160.29
Each
units
2 24 - 10mm 24mm 48mm 15mm
RS Stock No. 878-7875
BrandRS PRO
HK$140.71
Each
units
0.8 32 Steel 6mm 12mm 25.6mm 6mm
RS Stock No. 521-7360
BrandRS PRO
HK$32.49
Each
units
0.8 48 POM 6mm 14.5mm 38.4mm 4mm
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