Re: New 7x12 delivered and on the bench.
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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 ? ? ?
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From: [email protected] < [email protected]> On Behalf Of j_r_abercrombie via groups.io Sent: Friday, April 1, 2022 3:09 PM To: [email protected]Subject: Re: [7x12MiniLathe] New 7x12 delivered and on the bench. ? 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. Attachments:
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