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 21 - 40 of 313 products
Results per page
Description Price Module Number of Teeth Material Bore Diameter Hub Diameter Pitch Diameter Face Width
RS Stock No. 521-7130
BrandRS PRO
SGD4.34
Each
units
0.5 48 POM 5mm 12mm 24mm 3mm
RS Stock No. 521-7332
BrandRS PRO
SGD4.71
Each
units
0.8 35 POM 6mm 12mm 28mm 4mm
RS Stock No. 878-7916
BrandRS PRO
SGD24.08
Each
units
1 30 Steel 6mm 14mm 30mm 5mm
RS Stock No. 878-7840
BrandRS PRO
SGD41.66
Each
units
0.5 45 Steel 4mm 10mm 22.5mm 4mm
RS Stock No. 521-6553
BrandRS PRO
SGD11.82
Each
units
2 15 Steel 12mm 24mm 30mm 20mm
RS Stock No. 878-7815
BrandRS PRO
SGD11.59
Each
units
0.5 10 Steel 2mm 7mm 5mm 5mm
RS Stock No. 521-7102
BrandRS PRO
SGD4.53
Each
units
0.5 36 POM 5mm 10mm 18mm 3mm
RS Stock No. 521-7023
BrandRS PRO
SGD5.11
Each
units
0.5 20 POM 4mm 8mm 10mm 3mm
RS Stock No. 521-6193
BrandRS PRO
SGD11.97
Each
units
1 12 Steel 6mm 14mm 12mm 10mm
RS Stock No. 521-7455
BrandRS PRO
SGD12.33
Each
units
0.8 80 POM 6mm 15.5mm 64mm 4mm
RS Stock No. 521-6547
BrandRS PRO
SGD6.76
Each
units
2 12 Steel 10mm 18mm 24mm 20mm
RS Stock No. 521-7629
BrandRS PRO
SGD16.26
Each
units
1 50 POM 8mm 16mm 50mm 6mm
RS Stock No. 521-7411
BrandRS PRO
SGD10.46
Each
units
0.8 64 POM 6mm 15.5mm 51.2mm 4mm
RS Stock No. 521-7067
BrandRS PRO
SGD4.95
Each
units
0.5 30 POM 5mm 10mm 15mm 3mm
RS Stock No. 521-6317
BrandRS PRO
SGD29.88
Each
units
1 32 Steel 10mm 26mm 32mm 10mm
RS Stock No. 878-7904
BrandRS PRO
SGD20.43
Each
units
1 20 Steel 6mm 14mm 20mm 5mm
RS Stock No. 521-7613
BrandRS PRO
SGD11.03
Each
units
1 48 POM 8mm 16mm 48mm 6mm
RS Stock No. 878-7884
BrandRS PRO
SGD18.41
Each
units
0.8 35 Steel 8mm 19mm 28mm 6mm
RS Stock No. 521-7506
BrandRS PRO
SGD7.67
Each
units
1 20 POM 5mm 11.7mm 20mm 6mm
RS Stock No. 521-6250
BrandRS PRO
SGD13.37
Each
units
1 22 Steel 8mm 18mm 22mm 10mm