Identify a thread

[rick]

Been a while since I have been on this group ..... traffic seems very
low ..... has everyone moved to a FB group or similar ?

Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a good
start.

Its a parallel male thread
OD : 0.728"
TPI : 24

Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

[Peter Fairbrother]

Post by rick
Been a while since I have been on this group ..... traffic seems very
low ..... has everyone moved to a FB group or similar ?
Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a good
start.
Its a parallel male thread
OD : 0.728"
TPI : 24
Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

Can't help with the thread, sorry.

Does anyone know how to cut a deep-ish grove on the face of a piece in
the lathe?

thx


Peter Fairbrother

[David Billington]

Post by Peter Fairbrother

Post by rick
Been a while since I have been on this group ..... traffic seems very
low ..... has everyone moved to a FB group or similar ?
Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a
good start.
Its a parallel male thread
OD : 0.728"
TPI : 24
Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

Can't help with the thread, sorry.
Does anyone know how to cut a deep-ish grove on the face of a piece in
the lathe?
thx
Peter Fairbrother

Trepanning, you may have to grind your own bit for the job, dimensions
would be useful.

[Richard Edwards]

Post by David Billington

Post by Peter Fairbrother

Post by rick
Been a while since I have been on this group ..... traffic seems very
low ..... has everyone moved to a FB group or similar ?
Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a
good start.
Its a parallel male thread
OD : 0.728"
TPI : 24
Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

Can't help with the thread, sorry.
Does anyone know how to cut a deep-ish grove on the face of a piece in
the lathe?
thx
Peter Fairbrother

Trepanning, you may have to grind your own bit for the job, dimensions
would be useful.

I was about to say the same. Basically a grooving or parting tool BUT
with full clearance ground to match the OD of the groove. Sometimes best
to grind the tip in a cylindrical piece of tool steel. You can then
rotate to match the OD of the groove and give the tip additional support.
Richard

[Peter Fairbrother]

Post by Richard Edwards

Post by David Billington

Post by Peter Fairbrother

Post by rick
Been a while since I have been on this group ..... traffic seems
very low ..... has everyone moved to a FB group or similar ?
Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a
good start.
Its a parallel male thread
OD : 0.728"
TPI : 24
Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

Can't help with the thread, sorry.
Does anyone know how to cut a deep-ish grove on the face of a piece
in the lathe?
thx
Peter Fairbrother

Trepanning, you may have to grind your own bit for the job, dimensions
would be useful.

Got a few jobs, the biggest is 2 off 8mm wide by 10mm deep by ~220mm
dia, but I thought I'd use the mill for that one.

Next job is 3mm wide by 3mm deep by 29mm OD; I'd like to do a couple
dozen of those, perhaps more if the design takes off (and assuming it
works! still a bit secret for now, don't want to explain in detail a
public NG).

Last and not so important is a few off 3mm wide by 8-10mm deep by 42mm OD.

Post by Richard Edwards
I was about to say the same. Basically a grooving or parting tool BUT
with full clearance ground to match the OD of the groove. Sometimes best
to grind the tip in a cylindrical piece of tool steel. You can then
rotate to match the OD of the groove and give the tip additional support.

Hmm, start with a 3mm blade held slightly off-angle (so when it is held
straight you get outside-side penetrating clearance) in a 4-jaw, grind
outside to groove OD - or perhaps slightly less? to give outside-side
slipping clearance?

Inside - well, it's just a parting tool.

I have some 2mm and 3mm parting tool inserts, might try them. Also
thought of using a hole saw or two.


Peter Fairbrother

[mick]

Post by David Billington

Post by Peter Fairbrother

Post by rick
Been a while since I have been on this group ..... traffic seems very
low ..... has everyone moved to a FB group or similar ?
Anyway have a thread I could do with some help to identify.
It's on a 2 gallon steel container ..... so assuming imperial is a good
start.
Its a parallel male thread
OD : 0.728"
TPI : 24
Would have assumed a pipe thread but pitch is too fine.
Although undersize, possible it could have been a nominal 3/4"

Can't help with the thread, sorry.
Does anyone know how to cut a deep-ish grove on the face of a piece in
the lathe?
thx
Peter Fairbrother

Trepanning, you may have to grind your own bit for the job, dimensions
would be useful.

Got a few jobs, the biggest is 2 off 8mm wide by 10mm deep by ~220mm dia, but
I thought I'd use the mill for that one.
Next job is 3mm wide by 3mm deep by 29mm OD; I'd like to do a couple dozen of
those, perhaps more if the design takes off (and assuming it works! still a
bit secret for now, don't want to explain in detail a public NG).
Last and not so important is a few off 3mm wide by 8-10mm deep by 42mm OD.

I was about to say the same. Basically a grooving or parting tool BUT with
full clearance ground to match the OD of the groove. Sometimes best to
grind the tip in a cylindrical piece of tool steel. You can then rotate to
match the OD of the groove and give the tip additional support.

Hmm, start with a 3mm blade held slightly off-angle (so when it is held
straight you get outside-side penetrating clearance) in a 4-jaw, grind
outside to groove OD - or perhaps slightly less? to give outside-side
slipping clearance?
Inside - well, it's just a parting tool.
I have some 2mm and 3mm parting tool inserts, might try them. Also thought of
using a hole saw or two.
Peter Fairbrother

might be worth a look