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  #21  
Old 08-06-2020, 02:40 PM
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Make one.


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  #22  
Old 08-06-2020, 02:43 PM
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For a single use, a single flute cutter would be easy to make.

Sketch up a profile and I can walk you through it.

I made a custom countersink kust a while ago and posted a thread here on it, you could do the same process as I did for that, or, use some O1, heat with a torch and quench it, and final sharpen it.


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  #23  
Old 08-06-2020, 03:48 PM
Rob65 Rob65 is offline
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ORF, have you measured the angle on the mill knee?

I’m assuming it’s an internal dovetail? If so put two identical diameter drills, one on each side and measure the gap between them.

Do the same again with a pair of smaller or larger drills.

If you trigonometry is not up to scratch post the numbers here and I’m sure either I or someone else will work the angle out for you.

Rob


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  #24  
Old 08-07-2020, 05:59 PM
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Quote:
Originally Posted by Rob65 View Post
ORF, have you measured the angle on the mill knee?

I’m assuming it’s an internal dovetail? If so put two identical diameter drills, one on each side and measure the gap between them.

Do the same again with a pair of smaller or larger drills.

If you trigonometry is not up to scratch post the numbers here and I’m sure either I or someone else will work the angle out for you.

Rob


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Im lost. Where would I put the drills in the dovetail to mesure?
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  #25  
Old 08-07-2020, 06:46 PM
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Originally Posted by OldRedFord View Post
Im lost. Where would I put the drills in the dovetail to mesure?
you have two dovetails One on each side
From one dovetail to the other dovetail (then again with larger or smaller pins.

1)
If the mic can get in there I Like to measure over the pins.

OR

2)
keep one pin the same change the two on the other side.
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Last edited by GWIZ; 08-07-2020 at 07:18 PM.
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  #26  
Old 08-07-2020, 10:12 PM
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Quote:
Originally Posted by GWIZ View Post
...you have two dovetails One on each side
From one dovetail to the other dovetail (then again with larger or smaller pins...
Your method is correct except for the fact that--if you look at the picture--there is no "bottom" or opposing edge on the dovetail so nothing to contain the pins. To get really accurate measurements you should really use precision ground dowel pins instead of drill bits...
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  #27  
Old 08-07-2020, 11:27 PM
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Originally Posted by LKeithR View Post
Your method is correct except for the fact that--if you look at the picture--there is no "bottom" or opposing edge on the dovetail so nothing to contain the pins. To get really accurate measurements you should really use precision ground dowel pins instead of drill bits...
I agree precision pins, at this point I think anything would be better than what he is using.


I'm thinking this picture..
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  #28  
Old 08-08-2020, 02:53 AM
Rob65 Rob65 is offline
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Yes, I was thinking the mill saddle slides we the other way around.

You should be able to take the measurements from the slides on the underside of the table. As well as the measurements marked on GWIZ’s drawing we will need to know what diameter drills or pins you use.

A simple test you could do it to see how well a triangular file sits in the dovetail. I think the file will be a fairly accurate 60 degrees.

Obviously don’t file anything but just place the file and feel how well it fits the angle by gently rotating it from side to side.

Something else to try is put a straight edge of some description across the top of the slides on the mill knee and see how accurately a good quality hex nut fits against the edge of the slideway.

I’m still suspecting that the 59 deg you measured is a worn 60 deg.

Rob


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  #29  
Old 08-08-2020, 04:07 AM
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Originally Posted by GWIZ View Post
...I'm thinking this picture...
Yup, with the pic you showed the pins will work fine. And, yeah, I think proper dowel pins are a necessity. He's also going to need to grind the gibs to final size after they're machined...
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  #30  
Old 08-08-2020, 08:50 PM
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Ok I orderd two pin gauge sets from Shars. .061"-.250" and .626" to .750".

After I get the right cutter and a piece of Durabar I'll be making a trip down to south Georgia to machine this gib.
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