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

Q: Do the plans come with the plate steel pack?

A: No but you can buy them as a bundle and there is a discount. Click here for a list of bundles.

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)
  • High carbon steel for the platen face
  • 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. 

What's different in Gen 4 vs Gen 3?

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: The motor you recommended above is out of stock and I don't want to back order it and wait for it to ship, what are the requirements for a motor that will work with your grinder? 

  • TEFC
  • NEMA 56C 
  • 3600 RPM
  • 3 Phase
  • 2HP (Preferred)
  • 220v

    Q: What is a ball-park cost figure of a finished grinder?

    A: There are many variables but most spend between $500-$900 USD on their grinders. Most of the cost is in the motor & VFD. If you have those already or you go with a lower cost VFD you can save hundreds of dollars. 

    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. 

    European F.A.Q.

    What is included in the European bundle ?
    All the Plates incl. the work rest and the platen ground plate as well as the 2 parts for the tracking mechanism
    complete Wheel set including 4 Wheels, washers, Bolts, nuts
    The Hardware Set
    What is NOT included it the European bundle:
    you only need to organize the Tube steel, this is not included.

    This is where I get the 50x50x4mm Square tube, (better to use 4mm wall then the 40x40x5mm Tube will fit into the 50x50x4mm otherwise if use a 50x50x5mm you need to mill down a lot of the 40x40 tube to make it fit.


    Are the Wheels ready to use ?
    The Wheels are ready installed with bearings all ready to use, Material Aluminum
    - Platten wheels diameter 50mm ; 12mm hole for M12 Bolt
    - Steering wheel Diameter 75mm;  12mm hole for M12 Bolt
    - Drive Wheel Diameter  With 24mm Hole and Feather key nut, and Secure Screw
    Is the wheel Set including the Bolts and nuts ?
    Yes the Wheel Set includes all necessary parts to assemble 
    Is there any machine work to do on the Plates?
    All plates are laser cut in high quality S355 Steel, holes are all cut out to use Metric screws.
    What holding Dimensions for the Motor does the Motor Holding Plate have?
    This Plate has a 110mm Diameter for the Shoulder of the Motor and the 4 (4x90°) holes with Ctr Diameter 130mm are already laser cut in diameter 10mm th have some gap for easy installation (the tapped Holes in the Moter are M8 size)
    Tracking Mechanism
    The 2 Parts male and female parts are cut out, also the hole is ready for M12 cut out.
    EU Motor recommendation