Making an M12x1.75 skt cap bolt

I thought i’d do a quick history of the making of a bolt, just so you can see what goes into one. Some customers gasp at the price of my bolts, but thats because they expect me to press a button and have a cup of tea whilst the machine spews out a few hundred, in reality I stand for an hour making one by hand, sure i use a lathe and a milling machine, but they are manual machines and i wouldn’t have it any other way. Titanium deserves to be turned by feel with lashings of care and love, and thats what i do.

So once you’ve faced off the bar it needs centre drilling:

centre drilling bar for support
centre drilling bar for support
roughing cut to within 0.2mm of finished size
roughing cut to within 0.2mm of finished size
finishing cut to thread diameter
finishing cut to thread diameter
facing off shoulder to finished thread length
facing off shoulder to finished thread length
turning head diameter
turning head diameter
cutting chamfer for threads
cutting chamfer for threads
screwcutting thread
screwcutting thread
deburring threads by hand
deburring threads by hand
facing off head to length
facing off head to length
cutting chamfer on head
cutting chamfer on head
centre drilling head for socket
centre drilling head for socket
drilling head for socket, 0.5mm undersize
drilling head for socket, 0.5mm undersize
getting final size socket hole using end mill
getting final size socket hole using end mill
cutting bevel in socket hole
cutting bevel in socket hole
deburring the socket by hand
deburring the socket by hand
broaching the socket
broaching the socket
getting the swarf from the bottom of the socket
getting the swarf from the bottom of the socket
the finished item
the finished item

Its just that easy!

2 thoughts on “Making an M12x1.75 skt cap bolt

    • Author gravatar

      pete , love the real world way you make socket cap bolts very interesting , had an idea how you got the actual hexagon in it (breaching tool thing ) but fab to see how it’s actually done , you are bonkers but I totally think your dedication is tops.

      regards

      dean

    • Author gravatar

      pete , love the real world way you make socket cap bolts very interesting , had an idea how you got the actual hexagon in it (breaching tool thing ) but fab to see how it’s actually done , you are bonkers but I totally think your dedication is tops.

      regards

      dean

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