Hi all,
We currently have an aluminum job where we have to buy an endmill with a long length of cut. The finished part is 4 inches thick so we were going to buy a 4 inch loc endmill (I'm pretty sure you can go .030" past 4 inch depth with 4" loc endmill and be okay). I think we are going to go with a 1" diameter endmill to provide more rigidity at that long length.
We aren't looking for bottom of the barrel but we also aren't looking for the most expensive either.
I think we are going to buy a garr endmill. It was recommended to us by another very knowledgeable machinist who said that the flutes on a garr have minimum runout in relation to the shank and that the flutes of a garr have a very close concentricity tolerance with the shank. He said he bought cheaper brand endmills where this was not so. He said the flutes on some cheaper brands were not nearly as concentric with the shank and the flutes had a bit of runout (assuming your holder is running out <.0001 in the spindle).
My question is have any of you guys bought long endmills, or any endmill, that had runout or concentricity problems?
Thanks,
Chris
We currently have an aluminum job where we have to buy an endmill with a long length of cut. The finished part is 4 inches thick so we were going to buy a 4 inch loc endmill (I'm pretty sure you can go .030" past 4 inch depth with 4" loc endmill and be okay). I think we are going to go with a 1" diameter endmill to provide more rigidity at that long length.
We aren't looking for bottom of the barrel but we also aren't looking for the most expensive either.
I think we are going to buy a garr endmill. It was recommended to us by another very knowledgeable machinist who said that the flutes on a garr have minimum runout in relation to the shank and that the flutes of a garr have a very close concentricity tolerance with the shank. He said he bought cheaper brand endmills where this was not so. He said the flutes on some cheaper brands were not nearly as concentric with the shank and the flutes had a bit of runout (assuming your holder is running out <.0001 in the spindle).
My question is have any of you guys bought long endmills, or any endmill, that had runout or concentricity problems?
Thanks,
Chris