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Its a 1.5mm bolt going into a steel block. I'm not totally clear on the merits of helicoil vs threaded insert, but for the size and the cutting into steel i'd assumed an insert would be the way to go
That said, the question still stands - is there anyone that would do this kind of work in London, whether heli or insert? Seems like the 'one-man with a lathe' machine shops are all ancient history now!
Anyone know of a machine shop or the like that would drill out and fit a threaded insert? On the north west side of London if possible, but anywhere really would do.
I'd rather get a proper insert than a helicoil, but drilling out with a hand drill isnt something I'm keen on (having done it before)