Harold Hall
Finish machining
Finally, for the milling operations, straighten the curved edge, Photograph 6.
I say finally, but actually I repeated all of the above operations carrying out a light finishing cut to eliminate any movement in the castings due to the machining operations. Also, with so little to take off , I was able to concentrate on a better finish and used a tipped tool with a round tip as seen in the Photograph 7.
At this stage also check that the two main faces are square to each other. If there is a significant error, investigate why, if only very small then a very thin shim between plate and post positioned appropriately would be worth trying.
With the second face of the angle plate I used, having no provisions for fixings cast in, you can choose what is best for your use for it. I just drilled two holes at a pitch equal to that of the two adjacent tee slots on the vertical slide, this enabling me to mount it horizontally or vertically. These can be seen in photograph 7. You may do the same, or may choose to mill some more slots. In this case, slots frequently are made in the opposite direction to those on the other face, that is left to right.
Remove the casting surface on the two curved corners using a file, generously chamfer edges, clean out slots with a round file, and give the non machined surfaces a coat of paint and you have acquired a very useful angle plate, Photograph 8.
Metalworking
Workshop Projects
Drawing
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7
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