My new LMS 7500 has arrived!

tmenyc

H-M Supporter - Gold Member
H-M Supporter Gold Member
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I recently posted that I was considering downsizing from my 1943 Logan 820 (here) to a much smaller lathe, chiefly because the Logan was implicated in my shoulder injuries and that at 72 I didn’t feel confident of durable recovery with that lathe in frequent use. However, I also had a gut feeling that I had gotten the Logan into great mechanical condition but wanted its next owner to deal with whatever was coming next. So, with much helpful advice here, I sold it, all of its accessories, and all of the original stuff I got with it but wasn’t using. Got a good price, too. I sold knowing that although I was letting a fine machine that I knew well leave and that the exchange would bring pluses, minuses, and risks, it was a change that would be better in the end for me.
This post is about its successor, the Little Machine Shop 7500, why I got this machine, its arrival and uncrating/installation, its first uses and pleasant and unpleasant surprises.

1) The 7500 — is 8.5x20, 40”x22"x16" and 220lbs, has power feed in both z and y. The more I examined all of the 7x machines the more they did not feel right. I was selling a 10x24, and while I did not need most of the 24, being able to push the tailstock completely out of the way was important. And, the 90 lb weight of all the 7x machines just felt too unsubstantial. As for buying LMS, everything told me that any lathe bought from them would be in better condition than a similar one bought elsewhere. The photos on LMS' website show an earlier version of the 7500; mine does not have the chuck protector, which is good, but it also doesn't have a chip screen in front, which I'll have to figure out...all ideas welcome!
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2) Purchase. Dealing with LMS is fantastic. I wrote multiple emails and got personal, direct, AI-free, and thoughtful answers. In fact, in my call with (I think) the operations director to confirm that all of the purchases I was making (OXA QCTP, holders, 4J chuck, collect chuck and faceplate, chip tray) were correct for the 7500, she told me that I needed to move pretty fast to get one of the last two they had, so I pushed the button while on the call; the next morning “unavailable” appeared in the 7500’s listing. I don't know if that's temporary or the end of this model. There is also the 7550, a 7500 with a DRO that many buyers feel is problematic and that I didn't need and glitzier handles I can make myself if I want them, maybe a few other peripheral doodads.

3) Shipping and delivery. Shipping cost $250, flat rate from Pasadena, CA to New York City. LMS uses Estes, a major national land shipper. The flat rate also included everything I purchased with the machine, so I basically got everything I knew I wanted at one time. Estes showed up on time and dropped at the step of my apartment building. Clearly, I wasn’t dealing with the crate with my bum shoulder/arm, so had hired Task Rabbit, a very organized business in NYC and elsewhere for spot work; a young man, originally from north of the Arctic Circle in Russia, showed up at exactly the same time as the crate and, with my dolly, brought the crate to my shop, uncrated it, but then justifiably announced that it was too heavy for him to handle alone, since my shoulder made me effectively useless with someone I didn't know well. Later that day, a friend, an engineer/machinist from New Hampshire, fortuitously arrived, and we took care of getting the lathe out of the crate and up on my table. We had three arms between us and that proved sufficient. A bunch of ibuprofen and whiskey cured me later.
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More about the installation soon. All comments welcome!

Tim
 
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In addition to having better QC than some of the imports, I love that you don’t need to spend two weeks cleaning grease off of LMS machines.
 
PART II -- INSTALLATION, FIRST RUN

4) Installation proved to be relatively uncomplicated, notwithstanding my inability to bear much weight after the lathe was up on the worktable. LMS gives precise dimensions for drilling holes to match, but we were operating with limited time, so aligned the lathe on the chip tray and tray to the spot I wanted on the table, spotted a hole through lathe and drip tray on the table, drilled a 1/4” hole through the table, six times. Then we bolted down the tailstock end. The headstock end was a bit harder, since getting at the bolt-hole with the motor in place was a challenge. In the end it made it. Know that while this method makes a lot of sense, it is truly a two-person job, and we had at most 1.5. Aside from locating the lathe, installation was surprisingly uncomplicated. We leveled it, after leveling the table the previous day. There really wasn’t anything to do except clean off the grease and fire it up!

5) The unboxed reality So far, my expectations have generally been met by reality, with these exceptions
a) “covered in grease”: I don’t know what LMS does after receiving machines in-house from Sieg, assuming that Sieg is the manufacturer, but my 7500 was NOT slathered in grease. The ways, chuck, change gears, lead screw were indeed covered in a light grease, but not any painted surface, basically everything else. It all wiped off easily.
b) Controls: the 7500 has real controls, and having a variable speed motor is a pleasant surprise. The controls are precise, responsive, and solid. c) Swapping change gears. Was a mess the first time because I had to clean off the transport grease, and it was my first-ever gear change (the Logan had a wonderful QCGB), but it wasn’t as hard as advertised if you pay attention to the instructions, which were clear and photo-illustrated.
d) In the box: the 7500 came with a solid 4” 3-jaw chuck; very nice 2MT and 3MT dead centers; three flat wrenches in weird combinations that among them fit every nut on the lathe; the usual assortment of ok-ish hex keys; a chuck key with a spring, presumably to keep me from leaving in the chuck but which caused the chuck to fly halfway across the room…the spring is now in my spring drawer. (The little 4-corner toolpost looks pretty frail but is probably ok. I had no intention to use it, so no harm no foul there).
e) QCTP: I sold my AXA equipment; they would be too big and would have required removing the compound, but an OXA toolpost is TINY! It feels firm, though. I’ll know more about rigidity when I’ve had a chance to use it. My 3/8” tools hang off the back of the QCTP. This may become an OK once the shock wears off. Today I loaded up a bunch of the tiny OXA toolholders with my tools — 3/8 CCMT, CCGT, VNMP, my own HSS roughing,finishing/facing, and threading tools (can’t thank Mikey enough for this, miss him…), and a 5/16 brazed carbide roughing tool that I can now use.
f) Feeds/Speeds: Even after reading about it, I completely missed that feed rate is adjusted by change gears and spindle speed, not independently. When I cleaned the gears, I changed them to the combo for normal turning and facing. At 250rpm the z power feed crawled. That will take some getting used to. I’ll study the gear combos to see if there is a combo that will work faster.
g) Noise: it’s pretty noisy, certainly louder than my Logan was. However, I haven’t yet greased the gears or even lubricated via the oil points. I’ll figure out some sound deadening. Maybe a change to plastic gears for the main set. On the other hand, its 220 lbs don’t vibrate like my 560 lb Logan did, which is good in an 5th floor apartment. (Neither neighbors up or down have ever known I have a lathe… I made a comment to my wife about the noise, and she said that it wasn’t as loud as the Logan! Maybe I just had my hearing aids turned up too high.

FIRST RUN AND RESULTS
Yesterday I greased up the change gears, oiled every oil point I could find, and ran it for five minutes at 350rpm. One could hear it get quieter as it ran. Then I stuck a short piece of 3/4” 12L14 into the chuck and thought I’d aim for .650. A .020 cut with CCMT @ 300 rpm cut pretty rough, but it smoothed out OK with a very light cut. Then I tried .020 @ 600 rpm and it cut like butter. I let it cool down, then took one last .010 cut @ 700 rpm and landed on .6499. A completely new experience for me, since the Logan could never run that fast. I’ll definitely need to figure out a chip shield, though. The power feed ran plenty fast at those speeds, and it stopped quickly when I took it out of gear. I could not be more pleased after just one try. The picture is the cold roll at .650. I did not polish it or use a finishing tool; it's almost smooth to the touch.
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NEXT STEPS
This weekend I’m going to drill this piece, bore it, then turn it down, just to see the lathe working.
Then I'll cut some delrin and ebonite, do some fine cutting, drilling/boring, probably with the collet chuck.
I need to disassemble the 3-jaw chuck. It holds well, has minimal runout, but feels like it’s grinding a little inside. It needs to be cleaned out, which one should always do anyway and I haven’t done yet.

You've not seen any serious criticisms here...because there aren't any! I'm thrilled, have a lot of new muscle memory to build, but this is going to be a pretty great machine for my small work needs.
 
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PART II -- INSTALLATION, FIRST RUN

5) The unboxed reality So far, my expectations have generally been met by reality, with these exceptions
a) “covered in grease”: I don’t know what LMS does after receiving machines in-house from Sieg, assuming that Sieg is the manufacturer, but my 7500 was NOT slathered in grease. The ways, chuck, change gears, lead screw were indeed covered in a light grease, but not any painted surface, basically everything else. It all wiped off easily.
To my knowledge, LMS does do anything to the machines before shipping them out: my 3990 Mini-Mill not opened until I picked it up at Cabin Fever and needed to have it out of the crate to fit it in my Equinox.

b) Controls: the 7500 has real controls, and having a variable speed motor is a pleasant surprise. The controls are precise, responsive, and solid. c) Swapping change gears. Was a mess the first time because I had to clean off the transport grease
This isn't "transport grease," it is the grease that you need to replace as you note in step g

e) QCTP: I sold my AXA equipment; they would be too big and would have required removing the compound, but an OXA toolpost is TINY! It feels firm, though. I’ll know more about rigidity when I’ve had a chance to use it. My 3/8” tools hang off the back of the QCTP. This may become an OK once the shock wears off. Today I loaded up a bunch of the tiny OXA toolholders with my tools — 3/8 CCMT, CCGT, VNMP, my own HSS roughing,finishing/facing, and threading tools (can’t thank Mikey enough for this, miss him…), and a 5/16 brazed carbide roughing tool that I can now use.
I don't find that my toolholder extend too far from the back of the 0XA 250-001/002 holders on my 7x16:
3_8 HSS Bit.jpeg

3/8" HSS Bit is perfect, but could be a little longer for those times when you need more reach.

3_8 AR Warner CCMW Tool Holder.jpeg

3/8" AR Warner CCMW Tool Holder is typical of my 3/8" insert Tool Holders

3_8 Diamond Tool Holder.jpeg

Eccentric Engineering 3/8" Diamond Tool Holder is the largest 3/8" tool holder I have.

Mod 1_2 GTN3 Cutoff Tool Holder.jpeg

Even my cut-down 1/2" GTN3 Cutoff Tool Holder is a good fit

f) Feeds/Speeds: Even after reading about it, I completely missed that feed rate is adjusted by change gears and spindle speed, not independently. When I cleaned the gears, I changed them to the combo for normal turning and facing. At 250rpm the z power feed crawled. That will take some getting used to. I’ll study the gear combos to see if there is a combo that will work faster.
New lathes have higher RPM's that your Logan did just so that you can get the best performance from Carbide inserts. Your Logan had lower speeds and better power at low RPM's (and could run slower than your 7500 will with more power at low speeds which was great for parting & thread cutting).

You will probably need to purchase special gears if you want higher feeds at low RPM's, but most of us find ways to get slower feeds at the RPM's necessary for carbide.

g) Noise: it’s pretty noisy, certainly louder than my Logan was. However, I haven’t yet greased the gears or even lubricated via the oil points. I’ll figure out some sound deadening. Maybe a change to plastic gears for the main set. On the other hand, its 220 lbs don’t vibrate like my 560 lb Logan did, which is good in an 5th floor apartment. (Neither neighbors up or down have ever known I have a lathe… I made a comment to my wife about the noise, and she said that it wasn’t as loud as the Logan! Maybe I just had my hearing aids turned up too high.
Changing to plastic gears would help, but as you noted below, things improved after you re-greased the gears.

FIRST RUN AND RESULTS
Yesterday I greased up the change gears, oiled every oil point I could find, and ran it for five minutes at 350rpm. One could hear it get quieter as it ran. Then I stuck a short piece of 3/4” 12L14 into the chuck and thought I’d aim for .650. A .020 cut with CCMT @ 300 rpm cut pretty rough, but it smoothed out OK with a very light cut. Then I tried .020 @ 600 rpm and it cut like butter. I let it cool down, then took one last .010 cut @ 700 rpm and landed on .6499. A completely new experience for me, since the Logan could never run that fast. I’ll definitely need to figure out a chip shield, though. The power feed ran plenty fast at those speeds, and it stopped quickly when I took it out of gear. I could not be more pleased after just one try. The picture is the cold roll at .650. I did not polish it or use a finishing tool; it's almost smooth to the touch.
Please don't think I'm criticizing, just trying to be helpful. Have fun and keep us updated as you get used to you new machine (and when you get your mill ;))


Charlie
 
You've not seen any serious criticisms here...because there aren't any! I'm thrilled, have a lot of new muscle memory to build, but this is going to be a pretty great machine for my small work needs.

I'm glad to hear that. I kept waiting for the other shoe to drop as I read through your posts.

Sounds like the only real issues are "it is different" and you are having to learn to work with the new machine.

Based on published specs the 7500 should be more than a foot shorter and nearly a foot narrower. Having it in place, do you notice the difference in size and feel like you have really gained some space?
 
3_8 Diamond Tool Holder.jpeg

Eccentric Engineering 3/8" Diamond Tool Holder is the largest 3/8" tool holder I have.
Interesting. The fella at Eccentric Engineering (is it Greg?) recommended, because I have a mini lathe with an OXO size QCTP, that I buy the left hand holder and use it in the other position in the QCTP. I did so and I've not really got on with it.

In fact I was about to offer it tonight to anyone who wants to pay the postage. :)
 
I'm glad to hear that. I kept waiting for the other shoe to drop as I read through your posts.

Sounds like the only real issues are "it is different" and you are having to learn to work with the new machine.

Based on published specs the 7500 should be more than a foot shorter and nearly a foot narrower. Having it in place, do you notice the difference in size and feel like you have really gained some space?
Yes! In addition to the smaller footprint it is within an inch of the wall. The Logan was a foot away.
 
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