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


Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
+1 403 282-7335

234Nm 75 Series Worm Gearbox 30:1

ID: TRM4404_0
Recommended for new designs: Phidgets Inc. is not the original manufacturer for this product, but we intend to sell it (or a similar replacement with a compatible form, fit and function) 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: 49

Qty Price
5 $149.18
10 $142.97

Worm drives are compact gearboxes with high output torque for their size. This particular gearbox is rated for 234Nm and is compatible with 75 Series 35mm output shafts. The input shaft is 24mm 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 Gearbox Series
TRM4012_0 $9.65 75
TRM4013_0 $10.75 75

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
TRM4324_0 $6.85 24 mm 611.8 kg·cm 4000 RPM
TRM4328_0 $14.80 24 mm 3.3 Mg·cm 4000 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 24mm bore pulleys and sprockets:

Product Physical Properties
Image Part Number Price Inner Diameter Number of Teeth
TRM4133_0 $7.40 24 mm 50
TRM4134_0 $12.95 24 mm 72
TRM4154_0 $7.00 24 mm 20

Product Specifications

Gearbox Properties
Gearbox Type Worm
Gear Ratio 30:1
Backlash Error 0.33°
Maximum Strength of Gears 234 N·m
Shaft Maximum Radial Load 7.4 kN
Input Shaft Diameter 24 mm
Gearbox Series 75
Customs Information
Canadian HS Export Code 8483.40.00
American HTS Import Code 8483.40.50.10
Country of Origin CN (China)


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