[sdiy] Trying to raise my stepper motor torque using different gear installed

[Mike Bryant]

If you leave the motor speed the same and have the output cog rotating at half the speed then the torque will increase (though not doubled).

You should always keep the motor voltage the same as it's designed for that.  Note however this arrangement has the possibility of stalling the motor, in the same way that mountains sometimes stall cyclists.  So make sure you have some form of protection to cutout the power if you do get a stall.
________________________________
From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Jean-Pierre Desrochers via Synth-diy <synth-diy at synth-diy.org>
Sent: 28 November 2025 15:41
To: Synth-diy at synth-diy.org <Synth-diy at synth-diy.org>
Subject: [sdiy] Trying to raise my stepper motor torque using different gear installed


This is a question for mechanics engineer..



I'm using this type of stepper motor in a project:



SanMotion SF2424-10B41

* Bipolar

* 200 steps per revolution

* 24vdc @ 1A

* Torque - Holding (oz-in / mNm) 113.30 / 800



[cid:image001.jpg at 01DC6053.93D84AD0]

Its shaft has a 16 teeth gear installed

pulling a small chain.

The picture shows the type of gear and chain used

to run my system.



[cid:image002.png at 01DC6053.93D84AD0]



I'd like to raise up this stepper max usable torque

by using a gear with larger number of teeth

and lowering the rotation speed accordingly

to keep the same final chain pace as the original one.

For example: Using a 32 tooth gear and a rotation of half the original 16 teeth’s speed (16/32).



My question is

Would this modification raise the final torque significantly ?

Keeping the same 24vdc 1A power supply ?
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