Hi Veni,
The common mini-lathe has manual change gears on the end of the
headstock. You either look up a table of thread pitches to determine
which gears are needed or do your own working out on the back of an
envelope. I do both. Only the most common pitches are in the table.
There are also software utilities around that will give you all the
permutations.
The lathes come with a selection of these change gears. If you're buying
a mini-lathe specifically for thread cutting be sure to buy an imperial
lathe for imperial threads or a metric one for metric threads. Not that
that totally limits you to one. Unless threading over a long length you
can usually get away with a thread within a couple of percent. Or if
you're really after an accurate thread, conversion kits aren't overly
expensive. I think LMS (www.littlemachineshop.com
<> ) want about $40 for a leadscrew &
threading dial kit and another $30 for a complete set of change gears.
They also sell the change gears individually if there's a special combo
you need.
John
--- In 7x12minilathe@..., "veniaver2006@..."
<veniaver2006@...> wrote:
Hi,
I'm newebie and wonder if this minilathe carries a
NORTON gearbox.
It's for doing threads, so if an alternative method
let this minilathe get that, it would be OK.
I've been told that if done that this kinda minilathe
get the job done thru a set of gears and still getting
same results.
Intend to get a 3/4 " BCP thread within a PVC dado.
That PVC female thread should match a 3/4" std piece
of plastic pipe (cold water type) cutted to a lenght
of 1 1/4" .
Hope your hints.
Bests,
Veni
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
