PLEASE HELP with inserts for a indexable end mill

dodoknives225

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Hi guys I am a knife maker and I am trying to do something new with milling 3/4 of the titanium on the handle to half the thickness of the other 1/4. So talking to a couple people I decided the best way to go is with a indexable end mill that I can put carbide inserts into. So the problem I am having is I don't know wich way the inserts go ( I thought I did but after trying this maybe not) If you look at the insert its a triangle and in the endmill there are pockets for these inserts to go into now I know the point of the triangle goes in so that way one of the 3 sides is slightly coming out of the end mill...that part I got the part I don't get is on the inserts there are 2 "faces" of the triangle and its tapered so one face is slightly bigger than the other.... now to me it looks like a beter fit if the slightly smaller face of the insert slides into the pocket where the smaller face is up agenst the back of the pocket and that means the slightly larger face is the face that the screw comes down on to hold it in place.....is that right? I guess that would mean as it spins the larger face would be leading that's what I thought but someone told me that is should be the opisite where the smaller face is the one that the screw presses up agenst....so I am a lil confused with this I hope I explained this right if not please ask me to try and explain better I really need help I am stuck cant go any farther with this prototype knife until I get this figured out.
 
Larger face as the cutting face means there will be a relief so the cutter doesn't drag on the material. That is what you want. So smaller face towards the pocket on the holder.
 
Yes, you have it right. With the insert in the pocket, the edges of the insert should taper back from the point of contact with the material.
 
I just ordered one of these for $20, with a 19mm shank/20mm cutting dia. Will have to test drive it and see.
I'd like to get a 50mm or so face mill also that uses the same size insert - APMT1135PDER

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