Dovetail messed up

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Brighouse. Yorkshire, UK
I couldn't get the measurement over the pins to go down. Cut after cut there was always a little still to come off. Now I know why, I messed it up due to incompetence and old eyes.
 

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I couldn't get the measurement over the pins to go down. Cut after cut there was always a little still to come off. Now I know why, I messed it up due to incompetence and old eyes.
Haha, poor you! Did you already cut the other part?
30% of my mistakes are incompetence, 80% impatience, 10% poor or wrong equipment and at least 20% someone elses fault. The remaining 70% is casued by my poor math performance and insufficient thinking ahead. :cool:
In this case it is obviously a faulty dove tail cutter! (so someone elses fault) 😉(it always is)
I would probably scrap the part, or cut the entire top off and bolt a new piece on top that you can machine separately or bolted on.
 
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The rods were a bit too large to start with even if the cut had been along the full length of the D/T
 
Well disaster was very narrowly avoided. After I put a bigger cutter in and trimmed off the offending parts, the dovetail was 0.5mm too small. But it works anyway. If I can devise a way to attach a steel wear strip I'll ruin the dovetail even more and fix it with a steel shim so that the locking screw doesn't dig in so much. There's enough travel on the slide lock that it grabs it firmly for now, so I can have a test.
Timo, the other part was there all along. This part is a kind of prototype thing for grinding lathe tools on the Deckel as I'm fairly sure I'm going to have to cut a twin start Acme thread in the near future and insert tips are only available in expensive and very expensive flavours.
Deckel1.jpgDeckel2.jpg

This aluminium one is a test and I don't expect that it'll last years (though I expect that it'll see very little use, so maybe?) but it seems to allow angles to be ground accurately which will do nicely. I need to work out how nose radii are going to be set up.
I saw something similar on an e-bay listing but the required part doesn't seem to be sold on it's own so I had to make one.
 
Your rod that you were using for measurements was to big in diameter. you were not measuring the dovetail, you were measuring the corner. And depending on chamfer or how sharp the corner is it will give you different results.
 
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