Probably not how they were made by Kenna, however; hand files were quite expensive and you didn’t want to waste them removing metal from hard steel. Most bayonets are too soft to make good reamers anyhow (there are exceptions, and possibly they could be case-hardened). In 1760 various kinds of blacksmithing were important trades and there were plenty of professional toolmakers as well. (Some 20th century makers did make a reamer or two from a bayonet.)
Toolmaking was pretty advanced by 1760 or so - we’re after all entering the “modern era” by then. While nowadays the treadle lathes you see in museums - especially in North America! - tend towards the ‘rustic’, in Europe there was some very nice machinery available. Dublin in Kenna’s time was still pretty cosmopolitan - it was at the end of a (brief) period in the 1700’s when it was a major cultural city of Europe.
One of the first works dedicated to wood-turning was Bergeron’s “Manuel du Tourneur”, which was published in 1792 and reprinted by his son in about 1816. It’s a good source of info about what was available and, at least in part, how things were done. There’s some very elaborate stuff in there!
The only commonly-used pipemaking technology (ignoring the issue of treadle power vs. electric motors) that I can think of that wasn’t available in the 18th century is gun drills. Some respected current makers do not use them, using old-fashioned D-bits for long hole boring instead - slow, but effective when used carefully. But some tools that are cheap nowadays were more expensive - files for instance, which were all individually hand cut, and glasspaper/abrasives. Carbide and High-speed-steel tools were not available, but at treadle speeds they were not necessary. Premade metal tubing was a rarity, but sheet and bar forms were available for hand-rolling.
Nowadays the best pipemakers are all toolmakers too, and many make a majority of their tools themselves. In the 18th century this would have been a must.
Realize that Leo Rowsome only added an electric motor to his lathe in the '60’s or so according to his daughters, so all those sought-after 1930’s and '40’s Rowsome sets were made on a treadle lathe.
So to go back to the original question, Kenna would have had access to:
lathe (suitable for turning wood and metal), possibly with metal ways, and with cross-slide and/or “slide rest”; it was apparently not uncommon for these lathes to be kitted out as milling machines as well
high-carbon steel (for making tools like d bits, boring bits, reamers, gouges, etc.)
grinding wheel
loads of cutting tools/chisels/turning tools
sheet and bar brass (for making keys, springs, ferrules, and tubing)
ivory, bone, and horn
hard wire for making small bits, etc.
pillar drills, bow drills, hand reamers, gimlets
hammers and anvils
all sorts of saws, planes, froes
hand grinding stones
files
fine abrasives
mutton fat (cutting agent, machine lubricant)
shellac, linseed oil, acids, varnish, etc.
He would also have had many years’ experience and training, making and using hand tools (and the backing of generations of such knowledge). This is the part we are missing today! Oh yeah, and time…
Bill