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 are specifically designed to transmit large amounts of power by placing them on parallel shafts which rotate in opposite directions.

Spur gears have a straight tooth, involute profile 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 and are available in a variety of pitch, hub and bore diameters. 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.

What are the advantages of a spur gear?

  • High transmission efficiency
  • Compact and very easy to install
  • Constant velocity ratio
  • No slippage unlike belt drives
  • Highly reliable
  • Can transmit large amounts of power

Types of spur gears

Plastic 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
  • 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 and rolling mills

...
Read more Read less

Filters

Viewing 1 - 20 of 106 products
Results per page
Description Price Module Number of Teeth Material Bore Diameter Hub Diameter Pitch Diameter Face Width
RS Stock No. 521-6193
BrandRS PRO
£5.81
Each
Units
1 12 Steel 6mm 14mm 12mm 10mm
RS Stock No. 521-6244
BrandRS PRO
£8.89
Each
Units
1 20 Steel 8mm 16mm 20mm 10mm
RS Stock No. 521-7461
BrandRS PRO
£2.56
Each
Units
1 12 POM 4mm 8mm 12mm 6mm
RS Stock No. 521-6373
BrandRS PRO
£37.01
Each
Units
1 60 Steel 10mm 35mm 60mm 10mm
RS Stock No. 521-7477
BrandRS PRO
£3.12
Each
Units
1 15 POM 4mm 8mm 15mm 6mm
RS Stock No. 878-7897
BrandRS PRO
£6.24
Each
Units
1 10 Steel 6mm 12.5mm 10mm 5mm
RS Stock No. 878-7904
BrandRS PRO
£10.04
Each
Units
1 20 Steel 6mm 14mm 20mm 5mm
RS Stock No. 521-6806
BrandRS PRO
£83.19
Each
Units
1 100 Stainless Steel 12mm 60mm 100mm 10mm
RS Stock No. 521-7691
BrandRS PRO
£12.39
Each
Units
1 80 POM 8mm 18mm 80mm 6mm
RS Stock No. 521-7641
BrandRS PRO
£9.90
Each
Units
1 60 POM 8mm 18mm 60mm 6mm
RS Stock No. 878-7926
BrandRS PRO
£16.71
Each
Units
1 60 Steel 6mm 14mm 60mm 5mm
RS Stock No. 521-7506
BrandRS PRO
£3.77
Each
Units
1 20 POM 5mm 11.7mm 20mm 6mm
RS Stock No. 521-7483
BrandRS PRO
£3.27
Each
Units
1 16 POM 5mm 10mm 16mm 6mm
RS Stock No. 521-6389
BrandRS PRO
£61.61
Each
Units
1 80 Steel 10mm 40mm 80mm 10mm
RS Stock No. 521-6301
BrandRS PRO
£14.62
Each
Units
1 30 Steel 10mm 25mm 30mm 10mm
RS Stock No. 878-7907
BrandRS PRO
£9.68
Each
Units
1 12 Steel 6mm 14mm 12mm 5mm
RS Stock No. 521-7540
BrandRS PRO
£5.14
Each
Units
1 30 POM 6mm 14mm 30mm 6mm
RS Stock No. 878-7900
BrandRS PRO
£9.96
Each
Units
1 15 Steel 6mm 14mm 15mm 5mm
RS Stock No. 521-7584
BrandRS PRO
£6.60
Each
Units
1 40 POM 8mm 16mm 40mm 6mm
RS Stock No. 521-7499
BrandRS PRO
£3.55
Each
Units
1 18 POM 5mm 10mm 18mm 6mm