Gearboxes

Gearboxes, also referred to as gearheads or gear reducers, are enclosed systems consisting of a series of integrated gears within a housing unit. Gearboxes are designed to transmit mechanical energy to operate and alter the torque and speed of a driving device, such as an electric motor. At RS Components, we have a variety of industrial gearboxes, including planetary, spur, and ovoid models from leading industry brands, including DKM, Maxon, Panasonic, Portescap, Trident Engineering and out own RS PRO brand.

How does a gearbox work?

Inside a gearbox, there is one of several different types of gears that can be found - these include bevel gears, worm gears, helical gears, spur gears, and planetary gears. These gears are mounted on to shafts and rotate on rolling element bearings.

What type of gearboxes are there?

The most common types of gearboxes are spur and planetary.

  • Spur gearboxes have straight teeth and are mounted on parallel shafts. Spur gearboxes offer a high power transmission efficiency, a constant velocity ratio and have no slip.
  • Planetary gearboxes have the input shaft and output shaft aligned. They are particularly suited to high torque and low-speed applications.

How is the gear ratio defined?

The gear ratio is defined through the number of turns the output shaft will makes when the input shaft is turned once. When the gear ratio is 1:1, the torque and speed are the same. If the ratio is increased to 1:4, the torque is reduced and the maximum speed is significantly increased. If this is reversed to a ratio of 4:1, then the speed is reduced and the torque is increased.

What are gearboxes used for?

Gearboxes are used in various applications depending on the type and gear ratio. This includes machine tools, conveyor systems and elevators, as well as industrial equipment and mining industry applications. Right angle gearboxes can be utilized in rotary tables.


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Description Price Gear Ratio Gearbox Type Maximum Output Torque Shaft Diameter Diameter Overall Length Overall Width Overall Depth Maximum Speed Power Rating Continuous Output Speed Priced to Clear
RS Stock No. 892-9255
Mfr. Part No.K24.0 20
BrandPortescap
£71.76
Each
Units
20:1 Spur 0.7 Nm 3mm 24 mm 28.4mm - - 5000 (Input)rpm - - -
RS Stock No. 892-9265
Mfr. Part No.R32.0 17,4
BrandPortescap
£294.91
Each
Units
17.4:1 Planetary 20 Nm 8mm 32 mm 58.5mm - - 6000 (Input)rpm - - -
RS Stock No. 224-3568
Mfr. Part No.81037011
BrandCrouzet
£113.88
Each
Units
125:1 Spur 5 Nm 8mm - 65mm 65mm 32mm - - - -
RS Stock No. 323-4868
Mfr. Part No.110323
BrandMaxon
£62.01
Each
Units
84:1 Planetary 0.3 Nm 3mm 16 mm 22.7mm - - - - - -
RS Stock No. 892-9215
Mfr. Part No.R16.0 22
BrandPortescap
£109.52
Each
Units
22:1 Planetary 1 Nm 3mm 16 mm 30.1mm - - 7500 (Input)rpm - - -
RS Stock No. 420-5007
Mfr. Part No.118186
BrandMaxon
£62.02
Each
Units
157:1 Planetary 0.3 Nm 3mm 16 mm 22.7mm - - - - - -
RS Stock No. 424-100
Mfr. Part No.MX6G3BA
BrandPanasonic
£76.35
Each
Units
3:1 Spur 0.098 Nm 8mm - 60mm 60mm 24.5mm 416.66rpm 6 W - -
RS Stock No. 420-5013
Mfr. Part No.134782
BrandMaxon
£40.85
Each
Units
690:1 Planetary 0.375 Nm 3mm 16 mm 26.3mm - - - - - -
RS Stock No. 892-9243
Mfr. Part No.K24 0 5
BrandPortescap
£71.76
Each
Units
5:1 Spur 0.7 Nm 3mm 24 mm 25.4mm - - 5000 (Input)rpm - - -
RS Stock No. 892-9211
Mfr. Part No.R16.0 5.5
BrandPortescap
£107.37
Each
Units
5.5:1 Planetary 1 Nm 3mm 16 mm 26mm - - 7500 (Input)rpm - - -
RS Stock No. 423-995
Mfr. Part No.MX9G180B
BrandPanasonic
£110.04
Each
Units
180:1 Spur 9.8 Nm 12mm - 90mm 90mm 35mm 7.5rpm 40 W - -
RS Stock No. 445-0229
Mfr. Part No.110316
BrandMaxon
£67.91
Each
Units
275:1 Planetary 0.45 Nm 3mm 13 mm 27.6mm - - - - - -
RS Stock No. 423-999
Mfr. Part No.MX9G120B
BrandPanasonic
£110.04
Each
Units
120:1 Spur 9.8 Nm 12mm - 90mm 90mm 35mm 11.25rpm 40 W - -
RS Stock No. 892-9237
Mfr. Part No.R22.10.0 111
BrandPortescap
£103.00
Each
Units
111:1 Planetary 2 Nm 4mm 22 mm 54mm - - 5000 (Input)rpm - - -
RS Stock No. 718-896
Mfr. Part No.MRIG22 (100:1)
£126.20
Each
Units
100:1 Spur 4 Nm - - - 56mm 41mm - - - -
RS Stock No. 718-880
Mfr. Part No.MRIG17 (50:1)
£106.76
Each
Units
50:1 Spur 4 Nm - - - 56mm 41mm - - - -
RS Stock No. 892-9259
Mfr. Part No.K24.0 32
BrandPortescap
£71.76
Each
Units
32:1 Spur 0.7 Nm 3mm 24 mm 28.4mm - - 5000 (Input)rpm - - -
RS Stock No. 441-5153
Mfr. Part No.GS38.0900
£65.57
Each
Units
900:1 Spur 2 Nm 6mm - 38mm 38mm 26mm - - - -
RS Stock No. 336-270
Mfr. Part No.RG1/8.1250
£55.48
Each
Units
1250:1 Ovoid - 4mm - - 50mm - - - - -
RS Stock No. 892-9271
Mfr. Part No.R32.0 416
BrandPortescap
£181.18
Each
Units
416:1 Planetary 20 Nm 8mm 32 mm 70.5mm - - 6000 (Input)rpm - - -