FAQ

Some frequently asked questions about the Revolution 2x72 Belt Grinder Build

Q: If I buy the Ultimate Bundle what else do I need to complete the build?

A: To finish the grinder you will need:
  • Wheels (4 total)
  • An approved motor
  • A motor controller (VFD)
  • Some wiring including the plug to plug it in.
  • Links to all of these items are listed in the plan set. 

Q: What does it cost total, once built?

Cost Breakdown:
  • Ultimate Bundle: $555
  • Wheels (4 total): $150
  • 2HP Motor: $200
  • A variable speed motor controller (VFD): $85
  • (These prices include shipping)
A: Average Total Cost: $990

Q: What is it's worth once it is complete?

A: A grinder with these features bought and shipped would cost around $2500-$3000 - I have seen some as expensive as $7,000

Q: What's different in Gen 4 vs Gen 3?

A: The new design has updated:
  • Base Plate
  • Work Rest (easier to build)
  • D-Plate (lower pivot point giving 2" more above the work rest)
  • and now includes a tracking mechanism (parts, you have to drill and tap the holes)
  • All the builder has to source is the tube steel, wheels, motor & VFD. 
  • Optional Fusion 360 CAD file as an add on. 

Q: What should I look for in a motor?

A: In the plan set there are very specific links to motors that will bolt right up to the Revolution 2x72 Belt Grinder, but here are some requirements I like to meet when building a grinder.
  • TEFC
  • NEMA 56C 
  • 3600 RPM
  • 3 Phase
  • 2HP (Preferred)
  • 220v

    Q: Can I use a DC Treadmill motor to power the Revolution?

    A: Treadmill motors are an economical way to build a grinder. However, I no longer endorse their use unless there is absolutely no way to move forward, as they have a high failure rate in the grinding environment due to metal dust being sucked into the magnets and destroying the motors. Some have gotten away with it by building elaborate filtration systems but in my mind I think the cost and effort to do that outweighs the purchase of a decent TEFC motor and VFD. 
    A good 2HP AC motor will cost you under $200 shipped to your house/workshop and if you enclose the cheaper VFD I have been using in my videos you can build a great power-train for under $300. This solution will give you years of reliable service and you will not regret it. 

    Q: I don’t have 220 power in my workshop, can I run the motor on 110?

    A: Yes the recommended VFD has options for both, the one thing to consider is you will lose .5 HP of you use 110, which in my opinion is okay. You can always upgrade to 220 later and you grinder will be full power. 

    Q: I don’t have 3 phase power in my workshop, will single phase be okay?

    A: The motor we suggest is 3 phase, but the VFD converts single phase to 3 phase to allow the motor to be variable speed. So no need to have 3 phase power available to use this setup. 

    Q: Can I use a VFD with a single phase motor?

    A: There are many arguments about this subject and I’ll give you the short answer. Yes you can do it, but will the motor last? No. It will fry the motor and VFD and you will have to purchase the proper setup which is explained on the resources page (you must buy the plans to gain access to the resources page)

    Q: Can I run a DC motor like one from a treadmill?

    A: Yes it is possible. There are many modifications that are needed to do this. One of which is an air filter setup to keep metal dust from settling into the motors magnets. Also you will need to modify the motor plate to allow the motor to mount properly. 

    Q: Do you have a complete kit with everything included for the build?

    A: Not yet, we are in the process of finding vendors for the tube steel & wheels that can ship them directly. 

    Q: Can you run a smaller drive wheel? 

    A: Bigger is better. I would go with as big as you can find up to 8”. The smaller the drive wheel the less belt speed you will achieve. 
    When I built this the first time I used a 4” wheel and it worked okay but I saw significant changes in performance when I upped it to 7”. It was 100% worth doing and I use it on 100% speed all the time.

    Q: Why use metal wheels instead of nylon wheels?

    A: Quality. Even my aluminum wheels start to smooth out over time, nylon or plastic will wear away much quicker.