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BrianT

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#1
Good Morning All,

I picked up another 618 yesterday. Already have one but it seemed like a very good deal and came with a lot of other things. I believe the "new to me" 618 is not as old as the one I already have (both are Timken Bearing) and is in very good condition based on my initial inspection.

Couple questions...On the 618 I just picked up I found the doors/covers for the gears and spindle pulley are cast iron? The one I have originally are not and likely Zamak. Is the cast iron doors/covers unique?

Also is there any use for the armature setup other than its intended purpose?

Thanks...Brian
 

Rooster

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#2
Greetings Brian, i too have one those great lathes. According too Lathes UK. they came with both Aluminum and cast iron covers.
The Jacobs #100 chuck is very handy for a live center.
I used the dove-tail locking bolt for the taper attachment i made.
 

BrianT

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#3
Rooster,
I looked/read the Lathes UK info about 618s, I must of missed that.

Interesting idea/use for the Jacobs 100 chuck
Thanks
 

wa5cab

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#4
Other than a possible use for either of the two Jacobs chucks, in general the only thing that the armature maintenance set is useful for is working on armatures. I guess that if you needed to slit a a piece of tubing, it might be useful for that. But that isn't an operation that most people ever need to do.

FYI, all 618's have Timken bearings. You will sometimes see people confuse the 101.07301 with the 618 but it shouldn't be if they had only done their homework. And I don't think that I ever heard anyone mention before that their 618 had cast aluminum belt and gear covers. They may have been made for some specific market. I'll have to try to remember to ask Tom about that next time that I need to call him.
 

BrianT

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#5
The original 618 I have definitely has covers that are cast aluminum or some lighter cast metal. The "new to me" 618 are cast iron and the difference in weight were very noticeable. The cast iron seem much nicer and substantial. The newer machine seems to have come out of professional environment, the chuck has engraved "asset" numbers as does the extra sets of jaws. Its painted light green and nicely done, I could even believe its original from manufacturer. I received a folder of paper work along w/ the lathe, all from atlas. I will look through it to see if there is anything of interest when I get the time.
 

Rooster

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#6
Greetings Brian, my 618 has cast aluminum guards. If you find any date info in the paper work please let me know, as i am curious about the age of mine.
 

wa5cab

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#7
BrianT and Rooster,

Unfortunately, we don't have any annual production figures on any of the Atlas built lathes. The official story at Clausing is that all of that information got lost during one or more of Atlas-Clausing's or Clausing-Atlas's many moves over the past half a century. And for all I know, that could be what happened. And also unfortunately, Atlas or Timken never engraved inspection dates of the 6" spindle bearings. But we do know when 618 and 101.21400 production started and ended within about a year. We have quite a few serial numbers and some rough dates. So if you two would send me the serial numbers and any other information you want to add on your three machines, we can begin figuring out when if not why some machines have cast iron guards and some have either aluminum or maybe Zamak ones. And which alloy they are.

BrianT, if the chuck that you have that has the extra set of jaws is a 3-jaw, all solid jaw 3-jaw chucks originally came with six jaws. Three are for gripping the OD of parts whose diameter is about half the chuck diameter and smaller. And three are for gripping larger diameter parts out to about the diameter of the chuck.
 

BrianT

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#8
Over the weekend when I have time I will get the sn#s off the machines and look through the paperwork I have to see if there is any thing of interest to share.
 

wa5cab

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#9
OK. Thanks.
 

Rooster

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#10
Greetings wa5cab, my lathe has serial #013622. It also has 12 I stamped on tail-stock end o the bed.
 

wa5cab

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#11
Thanks. Confirm that yours has aluminum gear and belt guards.
 

Rooster

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#12
It has aluminum belt, gear guards and cross-slide cover. It also has the smaller half-nuts if that helps any.
 

wa5cab

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#13
OK. A very rough estimate of year of manufacture is 1953 +0-5. I have no idea what the 12I stamped on the bed is about.
 
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BrianT

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#14
Sorry for the delay, not much free time during the week.

The 618 I have with the aluminum guards has a sn# 013452. The 618 I recently acquired with cast iron guards has a sn# 007646.

I received a tremendous amount of extra machinist related items along with the 618 I just received, still need to sort thru all that. I also received a folder with Atlas literature with this lathe which I still need to look through as well, I will post what I find in there to see if its of any interest.
 

BrianT

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#15
Got a chance to look thru the papers, I thought there was more but unrelated. There is an "Instructions and Parts" manual dated July 1976. Parts list "No. ATL80-1" dated August 1980. Also an "Atlas 6 & 150MM Lathe and Band Saw Catalog" CAT. EXD-3. That looks like the newer MK2 version. If any of that is of any interest let me know.
 

wa5cab

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#16
OK. I'll ask you the same question that I asked Rooster. Can you confirm that the belt and gear guards and the cross slide cover are actually aluminum and not Zamak? One rather time consuming way to do it would be to remove and weigh the two guards. Then use the water overflow method of Archimedes to determine the actual volume and weigh it and calculate the density. Then compare that number to the published densities of cast aluminum versus Zamak V.

The highest serial number 618 yet reported is 027421. Judging from catalogs and some assumptions as to the catalog dates, the 618 was in production from mid-1937 until mid-1972, or 35 years. Assuming that the total number produced was 30,000 and a constant production rate, that dates your two to 1953 and 1946. As production during WW-II may have been higher than before or since, as initial production was probably lower, and as production in the 1970's and latter 1960's must have been declining, or they wouldn't have been discontinued, and as just a wild guess, say probably +0 -5 years on those figures.

The 1976 illustrated parts list is the last known one. We have a scan of it but the quality is poor as whomever did it used a rather low resolution and to further degrade it, used True Color instead of the correct monochrome. The best one that we have is the earliest illustrated one, from 1950. Comparing those two and the 1962 one, there were a few changes made over the years, but the main ones were with exactly what parts are used with the back gears. Most of the rest didn't change. The earlier manuals for all of the Atlas built machines tend not to give details on threaded fasteners and keys. A lot of that has been added to the 1950 edition in Downloads.

I don't believe that we have a copy of the ATL80-1. I have to check EXD-1.
 
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