Need Help Please!!!! and recommendations for harbor freight 1x30 belt sander

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New Member
Jun 6, 2024
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Lynbrook NY
Hi All, i was hoping someone can assist and maybe someone already performed this modification and have some recommendations. I currently build golf clubs and was using a HF 1x30 belt sander, as it runs at 3400 RPM to turn down golf ferrules. I wanted to convert the belt sander into a variable speed belt sander, I like to have an adjustable belt sander that ranges from a RPM of 100 - 3500.
My issue is with so so many motors, i just do not know one to choose. I also do not want to spend more than $100 for a motor, Power transformer and speed controller. I've seen other use sewer machine motors, treadmill motors, Electric scooter again just don't know which combo to use.

And I want to apologize if this was discussed already

Can someone please help me decide on the following
1. DC brush motor 12V or 36V or 48V and recommended watts
2. Power from 110V to 12V/36V/48V
3. DC Motor Speed Controller Switch

Thank you so much in advance
Last edited:
Ed, your speed range is out of the question, unless you have step pulleys
For example, a 3600 Rpm motor will have a minimum speed of 600 using a inverter type control.
DC motors have a wider range but the controller will be $$
If you can get a treadmill motor and controller (120 V ) form a throw-away source , it will be the best way ,
of buy a second used belt sander for slow speeds
I see lots of treadmills on Craigs list for little dollars
I will echo Rich's comment. I made my own 2 x 72" belt sander, using a treadmill motor and its controller board (one of several acquired for free). Different treadmill controller boards are set up in different ways, and some are more proprietary than others ... but most tend to have one of a few common boards, with varying levels of documentation on the internet. For this particular unit, the controller board requires a 10Hz pulse-width-modulated signal to control its speed (yes, only 10Hz - incredibly slow). I had thought I would rig up an Arduino to control it, but found that PWM controllers are available very inexpensively ($10? or less?) from Amazon et al., so I used one of those. Note that 2 x 72 purists will turn up their noses at treadmill motors, preferring VFD controlled 3-phase motors. The latter is likely superior, but very rarely do I run out of oomph with the treadmill motor I am using (nominally rated at an overly optimistic 2.25hp).

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