Also, look into thread forming taps. They are designed to form
threads by displacing instead of removing metal and might do what
you want: .
I don't find corresponding thread forming dies, but mcmaster has
an entire external thread repairing category:
And they reminded me of thread repairing files, which might suit
your purpose.
On 5/10/23 15:59, Tool247 wrote:
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I would buy a die and grind out 3 of the flutes with a
dremel stone and use to chase with one flute with finger
pressure.
also you could grind out 1 of a 2 flute tap or 2 of a 4
flute tap and chase the internal threads with finger pressure.
Also, I have used a regular tap as a chaser for external
threads by just pushing the points of a tap flute into the
external threads and chase them.
McMaster # 8309A11? metric thread file....0.8mm-3mm pitch
threads...external only
McMaster #2542A42??? Metric internal and external thread
file....ends might be just small enough to fit M12...
McMaster has other sets and choices for thread files and
thread repair.....
They actually have thread repair dies for metric....
good luck
Hi
Bill
my issue is cutting taps and dies seem to remove too much
metal. A thread chaser is a little different in that it
repairs minor flaws.
I tried an M12x1.0 die on the tailstock ram spindle thread
last night, no joy.. It was clearly the right size but
wouldn¡¯t run on readily.
Jeff
