CHJ
Established Member
In a previous post (fingernail jig) I promised an update.
As the existing guard clearances on the coarse 20mm stone were sufficient to accept a 25mm stone I decided to splash out on a Peter Child 150mm X 25mm recessed "Blue" stone on the basis that baring accidents it is probably the last one I will purchase.
Fitting it to the 'economy' grinder was straight forward but required a bit of 'fettling'.
On offering up the new stone it was found to be running out laterally (wobble), (as was the supplied 40 mm White Stone on the other end.
The cause of this ‘Run out’ I determined was due to the Pressed/Punched flanges not locating true on the shaft.
Having determined that there was no position for either wheel that would provide what I would consider a satisfactory lateral run out setting I overcame the problem by installing “wobble” washers behind each wheel, adjusting/rotating each until minimum run out was achieved..
The washers were made from soft Corrugated Cardboard with one face of the card removed (torn edges) over approx. half the circumference, when compressed these form a tapered washer. (ENSURE there are no pronounce ridges when compressed, if necessary dress torn face with glass paper on flat surface)
Fitting this extra washer behind the new wheel brought it closer to the guard on the outboard edge but still with 1mm clearance. I could have removed the stone and inner guard to place a packing washer behind the inner guard flange and the motor body to improve the aesthetics but opted to ignore the looks and stick with my now balanced wheel.
Now the bit to make the cabinet makers cringe: But it did not cost me anything other than the price of a few screws and a day in the workshop.
The grinder is now fitted to my mobile Grinder come Tool Station.
Both Support Jigs are interchangable between stones.
Which doubles as a handy turning Tool Holder with a couple of Draws on the side for the grinding Jigs when not in use and assorted lathe tools and accessories and a larger one in the course of construction for the lower front to hold my Glass Paper, Finishing waxes etc.
P.S. In with the stone from Peter Child came a guidance leaflet that covers the problems of Pressed Flanges and states that they can supply machined 1/2" flanges to overcome this problem, I did not see any reference to these on their web site but they would be worth including in your order if you have reason to suspect this problem.
UKTony":12p793hu said:
As the existing guard clearances on the coarse 20mm stone were sufficient to accept a 25mm stone I decided to splash out on a Peter Child 150mm X 25mm recessed "Blue" stone on the basis that baring accidents it is probably the last one I will purchase.
Fitting it to the 'economy' grinder was straight forward but required a bit of 'fettling'.
On offering up the new stone it was found to be running out laterally (wobble), (as was the supplied 40 mm White Stone on the other end.
The cause of this ‘Run out’ I determined was due to the Pressed/Punched flanges not locating true on the shaft.
Having determined that there was no position for either wheel that would provide what I would consider a satisfactory lateral run out setting I overcame the problem by installing “wobble” washers behind each wheel, adjusting/rotating each until minimum run out was achieved..
The washers were made from soft Corrugated Cardboard with one face of the card removed (torn edges) over approx. half the circumference, when compressed these form a tapered washer. (ENSURE there are no pronounce ridges when compressed, if necessary dress torn face with glass paper on flat surface)
Fitting this extra washer behind the new wheel brought it closer to the guard on the outboard edge but still with 1mm clearance. I could have removed the stone and inner guard to place a packing washer behind the inner guard flange and the motor body to improve the aesthetics but opted to ignore the looks and stick with my now balanced wheel.
Now the bit to make the cabinet makers cringe: But it did not cost me anything other than the price of a few screws and a day in the workshop.
The grinder is now fitted to my mobile Grinder come Tool Station.
Both Support Jigs are interchangable between stones.
Which doubles as a handy turning Tool Holder with a couple of Draws on the side for the grinding Jigs when not in use and assorted lathe tools and accessories and a larger one in the course of construction for the lower front to hold my Glass Paper, Finishing waxes etc.
P.S. In with the stone from Peter Child came a guidance leaflet that covers the problems of Pressed Flanges and states that they can supply machined 1/2" flanges to overcome this problem, I did not see any reference to these on their web site but they would be worth including in your order if you have reason to suspect this problem.
