I made a simple Belt Grinder Machine using scrap material.
The electric motor was an original 550w hydromassage pump.
At 2400 rpm, the belt goes to 15 m / s.
The base is made of 120 mm "C" iron profile.
The wheels are original spare parts of 125mm rotating-wheels for 30mm width.
The machine it's built for use the same belt of another belt sander I have, but split for three (4x36 belt).
Step 1: Motor Flange Adapt
The electric motor was an original hydromassage pump (In the image the first to the left).
For this project, I need to remove the impeller and modify the flange on the lathe.
I build a motor Arbor's adapter for extending and to host the wheel.
Step 2: Make the Base Frame
The base is made with two pieces 120 mm "C" iron profile.
The horizontal piece supports the motor and under the electrical connections and motor's capacitor.
On vertical piece, I made slots for the support tables and flat plates.
On back the vertical pillar for upper wheel support.
Spring inside the vertical pillar keeps sanding belt tight on wheels.
To cover the electrical contacts, with a scrap aluminum plate I made the bottom cover of the base.
I used a Sheet Metal Shears and a hydraulic press.
Step 3: Make Support Tables and Flat Platens
With some pieces of metal, I made the fixed table supports for sanding and support platen provides flat sanding surface.
Step 4: Make Upper Frame
The upper frame is made for supporting the wheel bearings hub.
The frame has the shape of an "L".
On the top a cross hole as a hinge and a slot for bearing hub.
The bearings hub is hinged on the frame and a screw knob it allows adjustable wheel tilt.
The bearing hub is made on a lathe.
Step 5: Finish
And finally the wheels.....
The machine works very well and I'm very happy about has done.
This project it's made in mind without a blueprint.