Introduction: Extreme Homemade Beltsander Raptor (Anglegrinder Hack!)

About: Electromechanic with a woodworking hobby who interesses in random projects...

This is mine Raptor V2.1 anglegrinder beltsander system.

The power comes from: Einhell TE-AG125 CE 1100W | D125mm (66euro in store)

Important detail is that this grinder has a variable speed from 2K to 11K!!!

I will try to show you as much plans as possible to make one.

But i'm no planmaker. i ussualy build from within my head :D

Want to make one? BE SURE to read all texts and view videos, so you are sure you still want to begin with it...

Step 1: Step 1 : the Skatewheels

first of all: there are 2 videos that show some of the build and how it works.

Now: The photos i took are covered with the info you need to make the base of the machine.

Not "all" dimensions can be found. There still needs to be some imput and creativity from

your side.

1. the wheels.


These ones did i use, but you can use most wheels. no need for lights haha. (my mistake when ordering)

You also need ballbearings for 2 wheels (so 4!) and 4 ballbearings for the other side(see second photo.

bolts are M8. other dimensions are on it. NOTE: on of the normal nuts have been grinded to an angle!

Step 2: Step 2: the Drivewheel

This is the drivewheel to fit on most M14 anglegrinders.

I took an extensionnut of M14 and modified the wheel slightly so it can be pressed in. Then i glued it thight with 2 compoundglue.

Note this wheel has curves. I put this wheel on the anglegrinder ans let it spin into an other sander of grinder until the wheel gets crowned like this.

Step 3: Step 3: the Toolrest

The pictures and the drawing says more than i ever could. just follow it. The dimensions can be found in an other step where most dimensions are stored together.

Step 4: Step 4: the Frame

The frame has been made from normal steel. link ebay below.

Photos explains the most i can tell you.

On drawing 5 you see a kind of square with a nut on the side and a big hole in the center. That is the old clamp i made in wood for holding the anglegrinder. the V2.1 doesnt have that anymore. The guard of the anglegrinder has been modified to act as clampingmethod.

I also use a damper to make sure there is always tension on the belt.

Most bolts and nuts are bought in normal hardwarestores. Make sure to use nuts with plastic rings so they don't come loose on important points like the swingarm!!!

Picture 1 shows a multiplex(plywood) 18mm sheet with a membraan on top of graphite. to find any, check for Makita Graphite on google orso.

Drawings are included to show you details. The drawings are based on the machine, and not the other way arround like it normally is...

Step 5: Step 5: Random Things

I also made a C clamp that is easy to pull off for the switch on the anglegrinder. really usefull when you use it on a standard.

also some extra detailphotos provided just for viewing.

BELT!. The belt is kind of homemade. It comes from a 1000 X 100 mm belt that is made for a big contimac beltsander. I used scissors to cut them in half so they fit my machine. No idea a belt of 1000X45 exists...

Step 6: Step 6: Finish

Yes, this is not the perfect tutorial to make an identical copy. But anyone with a littlebit creativity and hands-on approach will find the ideas to make it work, just like it did :-) (well, i hope so...)

Be sure to check the videos.

Work SAFE! I hold no responsibility for your creations. My ideas are not always the safest. A machine like this can be found in store (only 2.259 dollar...) with all CE regulations to be safer.