Products for USB Sensing and Control
Products for USB Sensing and Control


Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
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20Nm 30 Series Worm Gearbox 30:1

ID: TRM4400_0
Recommended for new designs: This product is sourced from another supplier, but it (or a similar replacement with a compatible form, fit and function) is estimated to be available for as long as it is available from the supplier.

This after market gear box adapts your motor for high torque, low speed applications.


Quantity Available: 33

Qty Price
5 $46.18
10 $44.25

Worm drives are compact gearboxes with high output torque for their size. This particular gearbox is rated for 20Nm and is compatible with 30 Series 14mm output shafts. The input shaft is 9mm and you will couple to a rotating power source - typically through a jaw coupling, timing belt pulley or chain sprocket.

Output Shafts

The following shafts will fit into the output bore on this gearbox:

Product Physical Properties
Image Part Number Price Diameter
TRM4004_0 $4.45 14 mm
TRM4005_0 $5.00 14 mm

Shaft Couplers

If you need to connect the input shaft of this gearbox to another device with a shaft, you can use a shaft coupler:

Product Physical Properties
Image Part Number Price Inner Diameter Coupling Rated Torque Coupling Rated Speed
TRM4314_0 $2.80 9 mm 35.7 kg·cm 12000 RPM

Pulleys and Sprockets

If you're using this gearbox in a rotary system that requires a lot of torque, you may be interested in pulleys and sprockets. By using a two pulleys or sprockets of different sizes, you can increase the gear ratio of system. Pulleys and sprockets can also be used to transmit the motor's rotation over a long distance. For more guidance on building a transmission system, visit our Rotary Motion Primer. Here is a list of our 9mm bore pulleys and sprockets:

Product Physical Properties
Image Part Number Price Inner Diameter Number of Teeth
TRM4115_0 $7.40 9 mm 50
TRM4136_0 $2.80 9 mm 18

Product Specifications

Gearbox Properties
Gearbox Type Worm
Gear Ratio 30:1
Backlash Error 12°
Maximum Strength of Gears 20 N·m
Shaft Maximum Radial Load 1.8 kN
Input Shaft Diameter 9 mm
Gearbox Series 30


Here are all of our worm gearboxes:

Product Gearbox Properties
Image Part Number Price Maximum Strength of Gears Shaft Maximum Radial Load Input Shaft Diameter
TRM4400_0 $48.10 20 N·m 1.8 kN 9 mm
TRM4401_0 $62.90 45 N·m 3.5 kN 11 mm
TRM4402_0 $92.50 85 N·m 4.8 kN 14 mm
TRM4403_0 $111.00 163 N·m 6.3 kN 19 mm
TRM4404_0 $155.40 234 N·m 7.4 kN 24 mm
TRM4405_0 $203.50 418 N·m 8.2 kN 24 mm