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Thread: Small boring heads for milling
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25th March 2020, 04:20 PM #1Most Valued Member
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Small boring heads for milling
Hi there
I have recently picked up a BCA jig borer and intend on using it for light milling and drilling operations. Amounts the tooling that came with it are two boring heads with arbours in size 0 and size 1 branded “Lushington”
The size 0 has capacity up to 3/4” and arbour has a 3/16 hole. While the size 1 capacity up to 1.5” and hole size is 5/16.
I have no experience with boring heads but these seem very nice units and I’d like to understand what tooling I should be looking at for using them. The metals I generally use are aluminium, brass and titanium (Ti used in folding knives) and my projects are generally quite small in size.
Usually for holes where I am looking for a more precise fit I drill slightly under size and then ream to size. I also at times use a counterbore to make pockets for bearings or screw heads. I am wondering these boring heads can be used to counter bore my holes to specific diameter and depth (there is a fine feed on z axis) and if so what kind of insert tooling would be used for the task. The situation could be something like a 3/16 through hole with a 1/4 counter bore to a depth of 1mm (yes I like to mix my imperial and metric). Currently I drill under size, ream to 3/16 and then counterbore to depth with a 1/4 counterbore and 3/16 pilot. This has to date been done on a not so accurate drill press setup. I am sure the same process will be better on the BCA but wonder if the boring heads give me an alternate method with flexibility of adjusting the diameter.
So anyone using small boring heads and what tooling do you generally use with them?
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