wp55b0dd48.png
wpd530b04e.png
wp91074f43.jpg
wpa4923fff.jpg
wp0fe7637b.jpg
wp54b53ef2.jpg

Harold Hall

Workshop Processes

wpcd02818c.png
wpcd02818c.png
wpcd02818c.png

Finally,  angles 4 and 8 have to be ground on the outer end of the knife tool with angle 4 being achieve by the angle between the table and the wheel and angle 8 the angle of the tool holder on the swivel base, Photograph 8.  For this face the rest has been moved to the side of the wheel with the fence also having been moved from the front to back position to the left to right setting, this can be seen in Photograph 9.

 

The fence has no stop as the tool is just swept past the wheel though, as above, it will have to be set at a small angle to the wheel so that grinding takes place just on the corner of the wheel. With it being a cup wheel the fence can be set to use either the inner or outer corner depending on which way you chose to traverse the tool for grinding. The X axis serves no purpose but the Y axis traverse is used to set the amount ground from the tool. The result, seen in Photograph 10. The viewer will, I am sure, agree that the result is much better than most could achieve manually.

 

This would be an appropriate point to comment on the fact that the illustrations are using a cup wheel. Whilst this has some minor advantages all the tasks being seen could be carried out on a standard disk wheel with only very minor changes to the set up, more later in the article. For details of adapting a standard off hand grinder to take cup and saucer wheels, as seen in Photograph 11, see the pages relating to this. This of course would be in addition to the shops off hand grinder that would be used for every day tasks.

 

Round tool holder

Having covered the basics of using the rests above in the case of the lathe tool I will now just concentrate mainly on the set ups. Photograph 12 shows the round tool holder being used with a round tool bit. In this case a new boring tool is being ground and the photograph shows that the end is the first face to be ground, the process being identical to that seen in photograph 9.

wpa7b045ca.jpg
Tool and Cutter Sharpening, Lathe Knife Tool
wp6c0f7d34_0f.jpg
wp010d21fe.jpg
wp42075a6e.jpg
wp5edc7c73.png

 8

wp5edc7c73.png

 9

wpe7285997.png

10

wp5edc7c73.png

11

wp5edc7c73.png

12