On May 10, 2023, at 7:07 PM, rcjge <jgpedwards@...> wrote:
?
Can believe there’s no M12x1.0 thread chasing tap and die available…? maybe a European member of forums can help??
Grainger, Mactools, etc, don’t seem to have an M12x1.0 thread chaser. They are different from a cutting tap/die.? a tap or die for thread cutting could destroy the threads m trying to clean up… Dont know why the M12x1.0 die wouldn’t run onto the Unimat tailstock ram external (drill chuck) thread. It was obviously one sided with some chamfering on one side to allow settling over thread spindle nose but grabbed too much from there to be hand turned and I didn’t want to risk using a die wrench.?
Can believe there’s no M12x1.0 thread chasing tap and die available…? maybe a European member of forums can help??
Grainger, Mactools, etc, don’t seem to have an M12x1.0 thread chaser. They are different from a cutting tap/die.? a tap or die for thread cutting could destroy the threads m trying to clean up… Dont know why the M12x1.0 die wouldn’t run onto the Unimat tailstock ram external (drill chuck) thread. It was obviously one sided with some chamfering on one side to allow settling over thread spindle nose but grabbed too much from there to be hand turned and I didn’t want to risk using a die wrench.?
On May 10, 2023, at 2:58 PM, rcjge <jgpedwards@...> wrote:
?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.
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
On Wed, May 10, 2023 at
2:58?PM rcjge <jgpedwards@...>
wrote:
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.
On Wed, May 10, 2023 at 2:58?PM rcjge <jgpedwards@...> wrote:
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.
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.
Everyone I know uses taps and dies, and IIRC you're not interested in them.
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome. Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.
On Tuesday, May 9, 2023 at 04:21:21 PM CDT, rcjge <jgpedwards@...> wrote:
The problem with the toolpost shown here is that it only holds a tool in one direction. As mentioned elsewhere, "hkoesnadi" has toolposts currently on Ebay. Also, if you want something a little bigger, there is the steel Sherline toolpost, currently on sale at $227.
I use these on Sherline lathes, and am very satisfied.? It does not rely on a central lever, but a capscrew to fasten a toolholder in each direction.
Rather than item number, please search by Seller -- hkoesnadi. If you want one of these, don't fart around.? He only makes these and sells peridically.