This Chinese made bench grinder sold locally by "Adendorf". It has been in use for a while and every time I start it to up to grind a drill bit  or a lathe tool it wants to dance all over the place and makes a hell of a noise. In desperation I have decided to strip the machine an will try to make it  run quiet and smoothly.

Without waking up the whole neighbor hood.

Above pictures all the  grinding wheels removed and  and the machine run and the machine runs nice and smooth. The picture on the right the one grinding wheel for carbide tipped  lathe tools refitted , this grinding wheel is out off balance we will get a stone dresser to rectify this problem.

The following alteration will be done I will be fitting a sanding belt on the right side of the machine.

End plate 100mm x 8mm  machined out to 56 mm and drilled to a nice snug fit on to the right hand side of the grinder body in preparation of taking the boom for the belt sander

Top pictures in the process of making a boom made from 2" X 2" x 1/4" second hand angle iron and also re-cut the mounting plate. Picture on the far right holes drilled and tapped , mounting plate and boom assembled.

Picture on the left boom , this is material  removed and is left over from the Power Hacksaw job , temporary fitted to the bench grinder.

Center picture the 2" idler pulley made ,crowned and bored out to the correct size to have the 28 X 12 mm  ball bearings fitted.

Right hand picture bearings pressed in to position in the idler pulley, with the home made hydraulic press.

Picture on the left , both bearings pressed into the idler pulley.

Center picture main 3" driving pulley being machined , this pulley is made out of Mild steel hollow bar 80 x 40 mm, and will have an aluminum  center press fitted , after the center is fitted it will be reamed to 14 mm and 15 mm to fit snugly on the motor shaft. .

Center pressed in to the drive wheel ,it was a very tight fit the hydraulic jack on my hydraulic press was at its max 10 ton and just managed to press this center home. The next two pictures cleaning up the center part and drilling a pilot hole. The  far right picture shows the pulleys main body crowned.

ID bored to size and driving drum fitted to the right hand shaft .

The top of the boom cut down  to lighten the project if not needed the rest of the boom will be cut down so it will become 2' x 20 mm x 1/4 " angel iron.

Above pictures big change of plans , came to the conclusion that I went about it the wrong way, and there was no way I Could make it work . So the next step, I clanged the boom around to make it workable.  This will now be an workable easy adjustable idler pulley.

Left picture stud made and fitted to the boom ,this will be used to hold tension spring in position.

Center picture arm made and fitted this gives the spring just the right tension.

Picture on the right the machine run to check the belt alignment and it looks great with just enough tension from the spring.  .