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What is the way to put these holes in the right place?

They are on sloping faces

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Howard Lewis09/10/2019 20:44:30
2327 forum posts
2 photos

Have I misunderstood this?

"The holes have to be normal to the angled face".

So why not just clamp the work so that the angle face is horizontal, in both planes, and use the edges as the datum planes, then use the Mill as a Jig Borer to position the spotting drill or centre drill where the holes are required, and proceed as with any other horizontal face?

Howard

Ian P09/10/2019 20:56:53
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2171 forum posts
90 photos

Yes, (I mean to the method you describe) which is basically what I was doing, my query arose because two of the edges are not the usual square cornered type and measuring or referencing against them is less straightforward as one of the edges is 'blunt' and the other whilst 'sharp' might have a burr that makes determining the vertex of the two faces difficult.

Easily sorted with JBBs

Ian

Mike Poole10/10/2019 12:22:01
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2106 forum posts
51 photos

Gauge.jpeg

A gauge could be made like this, if the round bar is made dia.14.14mm then the face of the bar as indicated will be 10mm from the apex of the mitre, use you favourite edge finder to locate then position to drill and tap.

Mike

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