I did not know a FB 7X mini-lathe group
existed, but I'm not surprised.?
I am uneducated (ignorant) tho, so
please educate me as well
.
John
On 4/1/2022 7:27 PM, Michael Jablonski
wrote:
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I for one don¡¯t visit the Facebook 7x site
and I know several others here who don¡¯t. If it isn¡¯t too much
trouble I think the non-Facebook people in here would
appreciate seeing your ¡®discoveries¡¯ posted here as well.
?
Michael - California, USA
Micro-Mark MicroLux 7x16
LMS 3990 Hi-Torque Mill with power feed
?
?
?
?
On Thu, Mar 31, 2022 at 10:45 AM, MZ Rider
wrote:
Reckon I will need to do a bit of fitting
as a bit noisy using the main slide hand wheel near the head
stock.
I do not need a longer version so the 7x12 is enough for me,
also much cheaper than larger variations.?
Probably go for 4 jaw independent, maybe a quick change tool
post and thinking about a vertical table for milling.
Not likely to do much thread cutting but might look to
getting metal gears for the main drive. See how it goes.
I have a tachometer so will work out the approximate? speed
positions for the dial.
So any tips and points to really check out as I hopefully
have a closer look over the weekend.?
Your new lathe sounds a lot like the one
that was delivered to me a couple of days ago - a 'Vevor' 7x14
that was an impulse buy when I saw it @ $500 CAD (incl.
delivery) on walmart.ca.
I'm posting my 'discoveries' with it on the 7x lathe page on
Facebook, so I won't duplicate all that info here.
About the noise when moving the carriage with the handwheel-
That was one of the first 'problems' I noticed -? I found that
the alignment of the leadscrew to the half-nuts was the
problem - the threads in the half-nuts were rubbing on the
leadscrew even when they were supposed to be disengaged. NOt
good as it will wear the leadscrew and the half nuts. Also,
engaging the half-nuts (by turning the lever down) was pushing
(bending) the leadscrew. On my lathe the main problem was that
the two cap screws fixing the carriage to the apron were in
drilled holes with counterbores. On my 'other lathe', also a
7x14, those bolts rest in counterbored slots
so that the apron can be moved to align the half-nuts with the
leadscrew. With a Dremel grinder/end mill and a round hand
file, I made slots so that I could adjust the apron to get the
half-nuts aligned with the leadscrew. I also loosened the gibs
for the half-nuts a bit as it lets the nuts engage the screw
more smoothly. Probably not the best solution, so I wouldn't
recommend that change unless you find it necessary.
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