R8 & 3/4” Shank Tooling Holder

Turn your clamps 90 degrees and get them on the larger piece of the frame also . That is why you're getting that chatter on the edges . You want a very solid set-up when possible .
 
mmcmdl said:
Turn your clamps 90 degrees and get them on the larger piece of the frame also . That is why you're getting that chatter on the edges . You want a very solid set-up when possible .
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Yes, I definitely noticed the chatter!
 
Here is the clamp down for drilling the master hole template:

B7717924-79A5-4FE6-A17D-D7BA54BA8E53.jpeg
 
Erik , put an aluminum pad on your plate . Raise the clamp up on the heel block and crank er down . You don't need the rear clamp as it is doing nothing . I would also move the plate edge closer to the mill table edge to reduce all the chatter .
 
mmcmdl said:
The back of the clamp MUST be higher than what you're clamping ! ;) Once again , you're clamping the clamp and not your part . :grin:
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I noticed that. It seems like the strap clamp is engineered have just a wee bit of spring action after the workpiece clamps to the table.

I am really glad that you guys set me straight on this because I have had to do it for about a dozen setups in the last few hours. I am more than half done with the holes. I will upload a picture of the drilling.
 
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mmcmdl said:
Erik , put an aluminum pad on your plate . Raise the clamp up on the heel block and crank er down . You don't need the rear clamp as it is doing nothing . I would also move the plate edge closer to the mill table edge to reduce all the chatter .
Click to expand...

I had it figured that the clamp in back is an insurance policy, as I have had workpieces break free in a drill press (years ago).

Yes, I will put some aluminum pad on my plate. We want the strap to dig in to the aluminum, yeah?

I will try to move the work area closer to the clamp, but I am drilling, and I don’t want to drill in to my new table!
 
You'll get it . Just takes time and then it's habit . :encourage:
 
This project has a lot of holes to be drilled in the soon to be purchased aluminum plate. I will chamfer all of those holes, so there must not be any chatter!

I will probably buy 3/8” or thicker plate because I want to fly cut the whole top of each aluminum “shelf” after my drilling and chamfering.
 
erikmannie said:
but I am drilling, and I don’t want to drill in to my new table!
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No , don't do that . The first witness mark in the table is a killer in your mind , just like a new car or truck . :(
 
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