DIY Highly Adaptable Belt Grinder

This instructable is ment for people with experience in engineering.

We used the following machines to make our belt grinder:
Welding machine
Laser cutter (wooden wheel and pulley)
Milling machine
Belt saw
Lathe
Angle grinder

It is also possible to build the belt grinder using less machinery, but then you have to buy some extra parts.

Here's a list of the materials you need to build the belt grinder:

Tube profile 50x4mm:
60mm X2
180mm

Tube profile 40x4mm:
354mm X2
250mm X2
1000mm
120mm X2
60mm
800mm X4

Tube profile 30x4mm:
220mm X2 (depends on the used engine)
400mm X2
800mm
600mm
40mm

Tube profile 20x2mm:
380mm

Square bar 10mm:
478mm X2
358mm X2

Steel sheet 10mm:
420x300 mm (in our case 2X 420x150mm)
Diameter 75mm X2

Steel sheet 8mm:
145x50mm
60x25mm

Steel sheet 4mm:
170x20mm
155x150mm

Nylon bar diameter 60mm:
55mm X2

Plywood 8mm:
Diameter 300mm X7
Diameter 170mm X8

Remaining:
Steel axle 25x490mm
Steel axle 20x50mm
Steel tube diameter 30 x22x2.5mm
Bearing 25mm X2
Bearing 8mm X4
Bar hexagon 36x950mm
Bar hexagon 17x180mm
Eyenut m6
Knob screw m8x60mm
Knob screw m10x30mm
Knob screw m10x85mm
Threaded rod m10x220mm
Threaded rod m8x50mm
Threaded rod m8x100mm
V belt 1025mm (exterior)
Heavy spring
L-profile 30x1470x3mm

A: 30x400mm
B: 25mm
C: 40x250mm
D: 10x420x300mm (in our case 2X 420x150mm)
E: 40x354mm (mesured from far-side to far-side)
F: 40x60mm
G: 30x220mm

The parst G E and F are helt together with the threaded rod m10x220

Part A is welded to part C by drilling 2 holes in the side of part C

A: 60x55mm
B: m10x30mm
C: 20x380mm
D: 50x180mm
E: 170x20x4mm
F: 50x145x8mm
G: m8x60mm
H: 60x25x8mm
I: 50x20mm
J: m8x50mm
K: m6

You need to weld a m10 bolt to part D to connect part I/F to it.

A: 36x950mm
B: Diameter 75x10mm
C: Diameter 30 x22x2.5mm

Using loctite make sure part C does not put pressure on the bearing.

A: 155x150x4mm
B: 30x40mm
C: m10x85mm
D: 30x600mm

A: Diameter 60x55mm
B: 17x180mm
C: 30x800mm

The nylon wheel is assembled in the same way as the wheel in step 3.

A: 40x120mm
B: 50x60mm

You need to make this part twice.

A: 40x1000mm

To fully clamp part A to the 30mm profile you need to make a slot in both sides of part A.

It is also possible to mount part A to the 30mm profile the same way as step 7.

A: 30x1470x3mm
B: 40x800mm
C: 10x478mm
D: 10x358mm

Download the .zip below for the SolidWorks drawings of the belt grinder.