开云体育

Having evaluated headstock-to-bed alignment a couple of times in the past with little success, and seemingly chasing a moving target, I abandoned the effort.

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A month or two ago I installed tapered roller bearings in the headstock.?? I was not much impressed with the bed finish under the headstock, but moved on with the headstock reinstallation.

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Recent discussions regarding machine quality reinforced my desire to beat this lathe into submission.?? Using ?” drill rod in the 3-jaw chuck seemed to indicate the headstock as pointing down going towards the tailstock.?? Loosening both chuck-side bolts of the headstock, and inserting 0.001 under the flat and the V did not help.

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After more fiddling I loosened the third (last) bolt on the front-gear-train side.?? And shortly discovered the headstock can rock on an axis from the rear-chuck side to the front-gear-train side.??? The gap under the rear-chuck side of the headstock is 0.007” with the headstock resting of its own weight on the bed (and also with 45 pound chunk of steel on it).?? The rear flat of the headstock appears to have been machined at a slight angle – or warped.

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Shimming will be needed – just to get the headstock from rocking – and this is what I mean by very poor QC.?? But rather than just doing that alone (prior to any alignment efforts), I decided I want the headstock more rigidly attached.?? Especially since the area where the motor is mounted does not look very rigid.?? So I have added a fourth bolt to anchor the rear-gear-train side in a more positive manner.?? Also ordered an MT3 test bar to make things as good as possible.

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I mentioned the condition of the bed under the headstock earlier.?? One thing noted was light surface corrosion in the area of the rear-chuck side bolt.?? I do not think the headstock was ever properly cinched down there, or in reality even possible for that to be done.?? All three bolt holes had a small bit of burrs which have been cleaned up.?? There are also a series of light scratches running through the center of the bed angled 30 degrees off the rear bed edge.??? A lot of quality and care under there.

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Two images are in my photo section.

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Awaiting the test bar now.?? That should be interesting
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Lone Tree, Colorado? ?USA

Since LMS is often held up as the "good" maker of these lathes, this
is... disappointing.

=----------------------
paul fox, pgf@... (arlington, ma, where it's 37.3 degrees)

One of the things I learned while looking for appliances to put into our rental was that _every_ model from just about _every_ vendor had some negative reviews.? I don't think that comparing consumer-grade appliances to hobbyist-grade machine tools is a big stretch.? This is because both are very price-sensitive so the manufacturers have to manage their manufacturing so they can make money in the face of low profit margins.? The end result is a percentage of less than perfect items coming out of the manufacturing floor.? In those situations QC probably is a sampling process -- because time is money, and there isn't much to spare to make that profit margin.? So even "good" vendors will sometimes sell not-so-good product.

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Have you checked the unit price from Chinese brokers of 7x14 lathes?? ? One broker lists them at $99.00 for any quantity (yes, plus shipping- negotiable).

Anyone on this forum could QC the lathe in 10 minutes - takes longer for the paint to dry.
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Lone Tree, Colorado? ?USA

They have??common carrier rates for over sea shipping.??
The big cargo containers in 2002 cost $6,000. But 60,000 . The common carrier containers is will with lot different cargo .

Dave?