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Hi folks,

I've been flirting with the idea of a benchtop lathe for some time,
and it would be used mostly for photo/telescope adapters and parts.
Most of these do-hickies max out at about 2.5" diam. and a few inches
long, and many would be threaded at .75mm pitch, various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly et. al. Same
machines, different label. So....these are a couple of things I'm
wondering about:
What is the largest diameter stock I can chuck into the chuck? 3"? 2"?
I know the thread range is something like .05 - 2.0 mm, but what are
the steps? Or to cut to the chase; can I cut .75mm threads?
On a more general level, how do you folks find the quality of the
small lathes? Is a lot of tweaking and modifying required, or do they
work quite well out of the box?

Thanks,

Bob

Bob,
Where in Canada are you?

Jerry

Bob, you will find the answers to most of your
questions at my web site, mini-lathe.com

Frank Hoose


--- "sawadeee2 <bomo@...>"
<bomo@...> wrote:

Hi folks,

I've been flirting with the idea of a benchtop lathe
for some time,
and it would be used mostly for photo/telescope
adapters and parts.
Most of these do-hickies max out at about 2.5" diam.
and a few inches
long, and many would be threaded at .75mm pitch,
various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly
et. al. Same
machines, different label. So....these are a couple
of things I'm
wondering about:
What is the largest diameter stock I can chuck into
the chuck? 3"? 2"?
I know the thread range is something like .05 - 2.0
mm, but what are
the steps? Or to cut to the chase; can I cut .75mm
threads?
On a more general level, how do you folks find the
quality of the
small lathes? Is a lot of tweaking and modifying
required, or do they
work quite well out of the box?

Thanks,

Bob



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Hi Bob:

I've never seen a bb lathe but I understand that there seems to be
some small quality changes that make it somewhat better than the
usual 7 x 12. In fact I remember someone saying they had metal
change gears...

Here's a web site that has two basic programs that tabulate gear
strings for different threads including metric. One is Visual Basic
but the one I use is the old qbasic version. Both do the same thing.
It tells you the % error too. The program shows an error of .06% for
the two most common gear strings for .75mm. You can play with these
and see the effect on accuracy of having a 21 tooth gear.

http:www.cctrap.com/~varmint/alath.htm

I've made many changes on my lathe mostly for fun...It worked perfect
right out of the box.

Mike in Cranbrook B.C.






--- In 7x12minilathe@..., "sawadeee2 <bomo@s...>"
<bomo@s...> wrote:

Hi folks,

I've been flirting with the idea of a benchtop lathe for some time,
and it would be used mostly for photo/telescope adapters and parts.
Most of these do-hickies max out at about 2.5" diam. and a few

inches

long, and many would be threaded at .75mm pitch, various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly et. al. Same
machines, different label. So....these are a couple of things I'm
wondering about:
What is the largest diameter stock I can chuck into the chuck? 3"?

2"?

I know the thread range is something like .05 - 2.0 mm, but what

are

the steps? Or to cut to the chase; can I cut .75mm threads?
On a more general level, how do you folks find the quality of the
small lathes? Is a lot of tweaking and modifying required, or do

they

work quite well out of the box?

Thanks,

Bob