Hello All

I have just purchased a Little Giant toolpost grinder and was wondering which is the correct way to use it, I was told the lathe has to spin in reverse to the rotation of the grinding wheel? also how do I find out what the spindle speed for the lathe should be?

Regards

Roy

Thanks Nick got the manual from your Dropbox account.

Thanks Nick, it looks as though the Boxford Little Giant is that same as the Dunmore Tom Thumb no14A Grinder.

Hello All

Nick I looked at the link but the smallest size is 300mm, I may call and see if they can do smaller,

DC31k, there is not a problem, I stupidly did not realise until later on that my Grinder may be a later model because it does not have the round motor as the Dunmore does and some of the Boxfords, it has a parvalux motor that is square and a brown spindle casting and green motor colour scheme which may mean it is a lot newer than the round motors, also all of the bolts and threads are metric except the spindle which has been confired on another forum as being 1/4*32tpi, the reason for putting the size is that there may be a difference in spindle centre measures between the round and square motors and of course belt length, I take on board about adjustment but if I order belts from Dunmore and anyone else on here would like me to get them a belt at the same time I at least want to know that the ones ordered are correct.

Tony Griffiths has confirmed that the early round motor grinders were Dunmore and he sells belts made to length for £31.68 for one and the second half price, I dont know if that is plus vat or not but 2 belts are going to be around £50.

Yes that is another way but I am told it can lead to grinding pattern problems because the belt is stiffer where the teeth are and more flexible between the teeth, one way around this is to somehow mount the belt on something like a piece of wood turned to the inside diameter of the belt and mount this in the chuck and use the grinder to mill away the teeth to give a flat belt or perhaps turn it down to give a flat belt.

Thats correct 300mm is the shortest in flat belts but for the money I might just get a toothed belt and turn it over and reverse the grinder and put a drum sander in the headstock annd see if I can get the belt down to the 1-1.5mm thickness.

Yes that’s correct, when measured I get 270mm between spindles at start of adjustment and 285 at the end, it looks like I need new bearings for the spindle housing though.