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Re: $1000 Budget: Which 7 x 14 to buy?

 

Recent posts above should dispel any consideration of the 7x"10" lathe.? ?This variant, 7x10, has been so advertised for decades, and it is NOT 10", it is 8".? ? You will quickly find the use of larger jobber length drill bits are not going to work on these lathes.? ?A 7x12 should be your choice as the smallest bed length - that size has 4" more space than the purported to be 7x10 lathe.

And to complete the lathe dimensions above;

7x16
31" W x 10" D x 12" H
--
Lone Tree, Colorado? ?USA
Re: Funnies

 

why all the interest in Santa Claus?? Science has proved that he could never 'service' all the children round the world in one evening.

Here follows a scientific explanation for all the doubters (an oldie, but goody - to my mind!):

Santa's trip, from an engineer's perspective.

There are approximately two thousand million children (persons under 18)
in the world.

However, since Santa does not visit children of Muslim, Hindu, Jewish or Buddhist (except maybe in Japan) religions, this reduces the workload for Christmas night to 15% of the total, or 378 million according to the Population Reference Bureau.

At an average (census) rate of 3.5 children per household, that comes to 108 million homes, presuming that there is at least one good child in each. Santa has about 31 hours of Christmas to work with, thanks to the different time zones and the rotation of the earth, assuming he travels east to west (which seems logical). This works out to 967.7 visits per second.

Therefore, for each Christian household with a good child, Santa has around 1/1000th of a second to park the sleigh, hop out, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left for him, get back up the chimney, jump into the sleigh and get on to the next house.

Assuming that each of these 108 million stops is evenly distributed around the earth (which, of course, we know to be false, but will accept for the purposes of our calculations), we are now talking about 0.78 miles per household; a total trip of 75.5 million miles, not counting bathroom stops or breaks. This means Santa's sleigh is moving at 650 miles per second - 3,000 times the speed of sound. For purposes of comparison, the fastest man-made vehicle, the Ulysses space probe, moves at a mere 27.4 miles per second, and a conventional reindeer can run (at best) 15 miles per hour.

The payload of the sleigh adds another interesting element. Assuming that each child gets nothing? more than a medium sized Lego set (two pounds), the sleigh is carrying over 500 thousand tons, not counting Santa himself. On land, a conventional reindeer can pull no more than 300 pounds.? Even granting that the "flying" reindeer could pull ten times the normal amount, the job can't be done with eight or even nine of them - Santa would need 360,000 of them. This increases the payload,
not counting the weight of the sleigh, another 54,000 tons, or roughly seven times the weight of the Queen Elizabeth (the ship, not the monarch).? 600,000 tons travelling at 650 miles per second creates enormous air resistance this would heat up the reindeer in the same fashion as a spacecraft re-entering the earth's atmosphere. The lead pair of reindeer would absorb 14.3 quintillion joules of energy per second each. In short, they would burst into flames almost instantaneously, exposing the reindeer behind them and creating deafening sonic booms in their wake.

The entire team of reindeer would be vaporized within 4.26 thousandths of a second, or at about the time Santa reached the fifth house on his trip. Not that it would matter since Santa, as a result of accelerating from a dead stop to 650 m.p.s. in .001 seconds, would be subjected to acceleration forces of 17,500 g's.? A 250 pound Santa (which seems ludicrously slim) would be pinned to the back of the sleigh by 4,315,015 pounds of force, instantly crushing his bones and organs and reducing
him to a quivering blob of pink goo.

Therefore, if Santa ever did exist, he's dead now.

Merry Christmas

:o)

Dave
The Emerald Isle


_._,_._,_
Re: Funnies

 

It depends on how they "fly".? Them other quadrupeds might find themselves in the same sleigh (AKA boat) if they ate Rudolph!? I mean, reindeer are known to like eating some kinds of psychoactive mushrooms, and the active ingredient carries over.....

Rudolph the FLYING reindeer -- after eating Amanita Muscaria! :)



NO, I have never been tempted to try them, although they are really striking mushrooms.? Tales of bad experiences, plus a basic decision to not go there, were enough for me!

Happy Holidays Every One

--Mark
Re: $1000 Budget: Which 7 x 14 to buy?

 

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What ralphie said is good sound advise . I just went to Grizzly tools site cause its easier to do a comparison there . SO to go up 2" in bed length cost ya a extra 3" of width , the 9x19 is only 6" wider at a cost of $$$.

What do ya want to be able to do with yer new lathe . I built test equipment & assembly aids for 2 different computer co's & I'm always lookin as far ahead as I can .? Alot of folks put these lathes on bottom tool boxes . My South Bend 9" lathe is on a 32 x 80" solid core door & I have maybe 10-12 inches ov open top on the headstock side & maybe 16-18 " on the tailstock side . I wish my bench was a couple feet longer . My advise would be if yer gonna go the bottom tool box route to get the longset box ya can afford . Craigslist can be a good source for those tool boxes dependin on yer hood .


Their 6x10 comes in at


  • Overall size: 27-3/4" W x 11-1/2" D x 12" H

The 7x12

  • Overall dimensions: 27-3/4" W x 11-1/2" D x 12"H

7x14???

  • Overall dimensions: 30" W x 9" D x 10" H

8x16???

  • Overall dimensions: 36" W x 16" D x 14" H

Their 9x19

  • Overall dimensions: 37" W x 20" D x 15" H

animal

On 12/15/23 2:04 PM, Ralph Lehotsky wrote:

Remember, it's really on a 7 x 8, not a 7 x 10.? You'll wind up replacing the bed with a longer one, as a 7 x 8 fills up fast with a chuck in the tail and any size drill bit.? Think longer...

ralphie

Re: $1000 Budget: Which 7 x 14 to buy?

 
Edited

I did not know that apart of HF lathe.
I came very close to buying one. The I did purchase is 13.8" CC and by time drill chuck it getting short too. But this was because I down size was problem and use to a shorter lathe.? Glad I miss that bullet.?

Dave?


?Ralph Lehotsky 2:04pm? ?
Remember, it's really on a 7 x 8, not a 7 x 10. You'll wind up replacing the bed with a longer one, as a 7 x 8 fills up fast with a chuck in the tail and any size drill bit. Think longer...
ralphie
Re: $1000 Budget: Which 7 x 14 to buy?

 

Remember, it's really on a 7 x 8, not a 7 x 10.? You'll wind up replacing the bed with a longer one, as a 7 x 8 fills up fast with a chuck in the tail and any size drill bit.? Think longer...

ralphie
Re: $1000 Budget: Which 7 x 14 to buy?

 

I look at Harbor Freight?
Looks nice and does but turning at 2500 rpm.?
I got all belt drive and is quite to run.?

As longe can live gear noise it is a great mini lathe.?

Dave?
Re: $1000 Budget: Which 7 x 14 to buy?

 

Search is on temporary hold.? Finally realizing I'm gonna actually get a lathe I first need to clear a spot for it. Bigger job than expected. Meanwhile all this is going int my decision.? I'm leaning toward Harbor Freight in case I need to return it. DIssapointed that LMS or Grizzly doesn't guarantee nice fit and finish. Might as well go with something locally returnable.
Re: belt slip on Mini Lathe Machine with 600W

 
Edited

What little information the belt with 180¡ã rap 5 vee 12 mm poly belt can best at 1,800 rpm is ?hp / 370 watts. The best I? could find not very good information on power. If just simple calc at 3,600 rpm can go 1 hp / 740 watts so is basic ok on motors. But next reduction does not work the belt is going to slip even using simple calcs.?
On south Bend 9 in 1980's I used a poly v about 1" wide 4" dia at 800 rpm and never slipped on 1? hp DC motor

How tight can you tighten this belt ?

Dave
Re: Funnies

 
Edited

If wonder why funniest is when is slow everyone likes a funny to read.?
Please post your funny story every month.?

Remember have fun
Dave
Re: Funnies

 

Now we know?
Re: 7x16 Spindle to Tailstock Alignment Test Outcome

 
Edited

I have rebuilt a lot of old tools .
I get tail stock and head stock real close.
The chuck a Morse tapper reamer. The re-ream the tail stock quill.? Now it is very accurate and is simple.?

Did like parts of you book you posted on what say about it would have great 50 years ago.?


I would here storeys of casting of machine tools not age. You could see the casting with curve.? Hot castings to machine shop. I think have learned by now or maybe on mini lathes.?

Dave
Re: 7x16 Spindle to Tailstock Alignment Test Outcome

 

Don't forget to check the height of the TS; it should match the HS height. Getting an assortment of brass shim stock is worthwhile - once you have it on hand, you'll be amazed at how handy it is.

Roy
Re: 7x16 Spindle to Tailstock Alignment Test Outcome

 

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In Ted Hansens mini lathe book he uses aluminum foil shims under the front/rear of the headstock.



I really recommend this book. He goes through aligning (and improving) the Mini-lathe to create a much more accurate system, and the advertised ¡®every project only requires the Mini-lathe and a drill press¡¯ is correct.?

He¡¯s also published a few more articles in Home Shop Machinist since the book came out for further refinements



On Dec 14, 2023, at 11:03 AM, CBJessee-N4SRN <cbjesseeNH@...> wrote:

I started wondering if I could trust my 350mm MT3 test bar, so set up my indicator to zero on the top surface and ran it 10¡± to the end of the unsupported test bar (it¡¯s ~1¡± diameter) to confirm 0.008¡± deviation from spindle to 10¡± out. Then I popped the test bar out, rotated it 180 degree and mounted its MT3 taper again, with the same results. So, the test bar is pretty straight. Is it fair to conclude that the 0.008¡± rise is headstock/ways misalignment? I¡¯m mounting my indicator on top of the locked compound/locked cross slide.

I think I need only remove the control box and motor cover from the LMS 7x16 to get to all three headstock bolts. When I reassembled, I ran a bronze brush with WD-40 over the headstock surfaces to remove any paint overspray and gummed lubricant residue, wiped them well and lightly oiled before progressively snugging the bolts down.

Would the strategy be to loosen the left-end ?bolt and tighten the two right-end bolts to try and drop the tilt down?

<IMG_2635.jpeg>

--?
Bruce Johnson

The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.

Re: 7x16 Spindle to Tailstock Alignment Test Outcome

 

I started wondering if I could trust my 350mm MT3 test bar, so set up my indicator to zero on the top surface and ran it 10¡± to the end of the unsupported test bar (it¡¯s ~1¡± diameter) to confirm 0.008¡± deviation from spindle to 10¡± out. Then I popped the test bar out, rotated it 180 degree and mounted its MT3 taper again, with the same results. So, the test bar is pretty straight. Is it fair to conclude that the 0.008¡± rise is headstock/ways misalignment? I¡¯m mounting my indicator on top of the locked compound/locked cross slide.

I think I need only remove the control box and motor cover from the LMS 7x16 to get to all three headstock bolts. When I reassembled, I ran a bronze brush with WD-40 over the headstock surfaces to remove any paint overspray and gummed lubricant residue, wiped them well and lightly oiled before progressively snugging the bolts down.

Would the strategy be to loosen the left-end ?bolt and tighten the two right-end bolts to try and drop the tilt down?

Re: belt slip on Mini Lathe Machine with 600W

 

I think calculations for horse power is from vacuum cleaner companies.??

If calculated the power the belt can take at 1,800 RPM using 2" pulley with 180¡ã wrap it is a full 1/2 HP American .

I can not see a mini lathe using a full horse.??
The torque is need at lower speeds .?

I think biggest improvement need on mini is the power to spindle.?
Witch can done with a lot of work and cost.

Dave?

mike allen
Dec 2? ?
Tom do ya know what the RPM range is on that motor ? they don't say anything bout RPM unless I was staring right at it . My math puts that motor at 1.33 HP . Seems like a lot for these small lathes . But I also think our buds overseas have a different way of calculating things than we do .

Re: Tool post on mini lathe

 

Close-up?

Tool post on mini lathe

 

I install my tool post on my mini lathe today.

Re: Storing and shipping a mini-lathe

 
Edited

Grease everthing then wrap in plastic
Build a plywood box use a lot of screws .Do not use nails.?
Stuff box full of paper or popcorn ??
Then put wood box in a cardboard box for shipping company.?
Put a shipping label on the lathe and each box.

Dave

Re: Storing and shipping a mini-lathe

 

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In 2015 I packed and shipped my tools including a mini lathe 7x16 ?and my LMS mini mill. ?They were shipped from the East coast of the US to the Philippines. ?I worked with a broker for advise and used them for shipping and customs. ?I packed all of it myself. ?The broker said my total weight exceeded 7000 lbs. ?Some household goos but most of the weight was tools. ?Then in 2020 I did it again all in reverse moving back to Maryland.
The lathe, mill, and table saw were all packed in plywood boxes. ?The bottoms and ends of the boxes I used 3/4¡± plywood. ?The sides and top I used 1/2¡± and 3/8¡± of which I happened to have on hand. ?When using plywood there is no need for the ISPM-15 compliant stamp. ?I used 2.5¡± screws to attach the ends to the bottoms and 1.5¡± screws for the lighter plywood. ?The machines were through bolted to the bottom of the boxes and all movable parts secured. ?I sprayed all exposed metal with Bosheild. ?The shipment going to the Philippines took almost 5 months. ?Returning took a little longer because waiting for containers due to Covid. ?
The main thing to remember like others have mentioned is to secure the lathe to the bottom of the box/crate and have to loose parts to move around. ?I did not use any filler because I felt my boxes were secure enough without. ?I am about 300lbs and my boxes had no issue supporting my weight standing on the or stacking. ?My tools arrived intact with no breakage or issues after each shipment.

D Roy

On Dec 13, 2023, at 1:58 PM, mike allen <animal@...> wrote:

?I did spray foam for custom computer packing for 2 years in the 70's? ( yea I'm that old ) . If ya plan to go this rout make sure the lathe is secured to what ever ya use for a packing base . Use hardware that is protected from loosening & double/triple check that? the hardware is tight & cannot come loose . Use locktite , double nuts, aircraft nuts or smash the bolt so the nuts cant back off . Ya can remove them at destination with a hacksaw ( see ya already have a metal working project at yer new place ) .Make sure whoever does the spray foam double wraps teh lathe before spraying . If done properly Customs can remove the foam to inspect the unit & they wrap it back up .

animal

On 12/13/23 10:40 AM, Chris Albertson wrote:

? Was also thinking I could build a decent container out of aluminum square tubing and sheet welded together for almost as much as the plastic boxes.


That is the wrong approach. ?You do not need a strong-walled container. ? What is far more important is to keep the lathe from moving within the container. ? It must be 100% immobilized and not allowed to move. ?Spray foam is the best for that unless you are willing to wire-cut and laminate polyethylene foam. ? That is only justified if you have hundreds of lathes to ship so you can reuse the wire cut patterns.

Even if you built a welded steel box, the lathe would be destroyed in shipping if it were not immobilized inside the box. ? May as well use cardboard with full-thickness poly sheets on all 6 sides as it is cheap and affective.


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