We also flute barrels occasionally…
Fluting is one of those jobs that you just have to get on with. I would love to say we are currently fluting on a three axis CNC mill however we are not. Instead, we use a Bridgeport manual and either a dividing head or a rotary table, we have a variety of different ‘Turny-roundy-indexy’ sort of things in the workshop, however it is often down to what is on the machine.
On this occasion I used what was on the machine as it was already set up. This particular rotary table can be moved in two axis and currently wears a 4 jaw chuck with a collet block in it, so it was just a matter of set it to zero degrees and pop a collet in it.Incidentally, the writing on the table are notes from a previous job.
At the other end is a tail stock and with the barrel in place, the penultimate job is to check everything is correctly setup across all axis and fit the support.
The support (Not shown) either supports the centre of the barrel from the back or bottom and is either an angle plate or a jacking plate dependant on if I am fluting from above with a carbide bull nosed cutter or to the side with a rotary cutter.
At this point it is a matter of setting the start point, feed speed and depth of cut and kicking the job off. The downside is it a messy job on a manual and very time consuming and this stainless barrel was fluted over an evening and the following morning.
I have fluted many barrels and handled many more and my pet hate is sharp edges on the flutes so I always take care to de-burr them, ideally they are then blasted and Cerakoted however this barrel was stainless and the customer preferred a self colour finish.
So there you are a heavy stainless barrel fluted.
The technical bit:
8×6.0mm equispaced flutes cut to 3,0mm deep.
Length of cuts 330,0mm
Total weight saving 295 grams