Don. I Also live in Florida😄 I've got a !0" Atlas Lathe bolted to a 3/4 Slab 8" x 45"of cold Rolled That was Blanchard ground. The original bed was wood When I bought back in Michigan. So I watch you posts with great interest. I have always watched my Slides and gibbs do a dance when I take even the slightly aggressive cut or Parting. I just rec'd a 3" round of Cold Rolled to make my compound Slide replacement.
Sounds like you have that thing mounted solid. Keep your gibs snug and lock that carriage when parting. Love my Atlas for sure. I do a lot more on it than you can imagine. Don.
Few go into the theory of why and what’s going on with tool post deletes. I love the idea of off setting the tool post from the centreline of the boss. Also, great idea with using a circular shield on the mill. I’ll borrow that one thanks.
Outstanding video---I have an old Logan...and boy you aren't kidding that the compound rest is the weak point. I am going to attempt this next weekend!!
Brilliant idea and superb instructions. Just picked up a 618 two days ago with tooling on original Craftsman workbench. The owner had been given it and didn't use it. But the best part is it was advertised as an Atlas 3950 so I was pleasantly surprised. Going to make this modification in a few weeks when I pick up my mill. Do you have a recommendation on the tool post brand? Thank You
On the tool post brand.. Well, if you can swing the cost of an aloris. Otherwise all the knock offs are pretty much the same and will do the job. Good buy. Don
Don, this has been one of those things on my "To Do" list for quite some time. I wish I could add something useful but I think you covered it all; especially the offset you incorporated. I'll probably make two of them. One for my QC and the other for my 4-way turret. Hell, I might make one for my Lantern tool post too! I like options. Thanks! *Wakodahatchee Chris"
Under certain circumstances this eliminator has been really useful. A plus positive for smaller lathes for sure. Sounds like you've got some project time you need to set aside. Good luck Don
Very interesting video and solution. It would be simpler just to put the hole in the center as you can make almost of the work on the lathe but of setting the tool post shurely helps in terms of rigidity. It's a project on my list as i have a relatively small lathe and rigidity is very important.
The only way to eliminate the bending moment between the overhung tooltip and the tool post is to mount the tool directly over the vertical axis of the securing bolt for the quick change tool post. This would mean that you'd have to make a custom tool post. You're still going to have the same bending moment between the tooltip and the QC toolpost no matter where you mount it on the cross slide.
Granted, but in this set up, I move that moment back for QCTP mount which affords a bit more rigidity/leverage advantage between the cross slide and the QCTP. The entire set up is also significantly less intrusive around outsized work to boot. In use is were you feel and hear the difference of going sans compound. Don
If you used a larger diameter piece of steel for your solid tool post, your quick change tool post would have more support, and it would have better friction (more area) and leverage between the bottom of the QC tool post and the solid tool post.
Yes, for sure, I only have about 3/16 to the outer edge of the pad, and beyond that point there is no support. I used what I had on hand. If I had a piece 3/8 larger that what I would have used. Don
Don Thais a very good video, I made one like that for me milling attachment. I am going to make this one for my tool post, my machine is a lot older then urs, it has a lot of play In everything. I would lie to put a different motor and reverse but cannot figure out how to keep my chuck from unscrewing, got any ideas?
Ah the great question that plaques us all with screw on chucks. I only use reverse for backing up off a die cut or an oddball cleaning need or sometimes a grind job with the tpg. Very rare to use it and with great care. Don
As suggested in this video, I went back looking for some “tricks” on stiffening up the compound/cross slide in your milling attachment video but I guess I missed it. Any advice for stiffening up my qctp set up on my 12” Atlas craftsman lathe? I’m chattering all over the place. I’ve replaced the thrust bearings in the headstock, checked my gibbs etc…. I’m not having any luck. Thinking about changing out my chuck as a last resort. Any help would be appreciated
Hi Steve. Did you see my spindle bearing adjust procedure? Make sure your spindle bearings are adjusted properly. I cover in that one, the things to be sure of. Minimum stick out from the chuck, keep your tool extended the least amount possible, tool height properly set, tool sharpness. I did the QCTP eliminator to gain even more rigidity for harder work pieces. I don't know what chuck you're using so couldn't advise on that. But unless you have just one crappy chuck with a poorly set up backing plate hanging it out an extended amount from the spindle, then it shouldn't cause problems. You may want to try turning some different materials and see if its just harder turning materials affecting it. Also is there a difference when you use a tailstock center? It may boil down to having a weak motor and the motor bogging under load. Try turning lighter to heavier passes and see where it starts chattering the most. You should be able to turn off .025 (.050 total) on most cold rolled with a good 3/4 motor. My lathe is set up a bit differently with a 1 HP DC industrial motor, pulley reduced from its nom 1740 rpm speed, and its a total beast on there. It did a lot to quell bog/chatter. Hope that gets you going. Let me know. Don
In industry I've only ever used a lathe with the compound slide on it for the last 60 + years......those that think removing it for a solid block are amateurs......of course, if the lathe is crap any modification will improve it. BTW.......a QCTP is for convenience and if the tool overhang causes a problem that is par for the course.
"In industry"? What industry are you talk'n about? I think Don is too much of a gent to reply to your condescending comments. I on the other hand, consider myself more of a Florida Cracker. So let me set you straight. There ain't no *industry* left in the USA! We went from the most industrious country the world has ever seen. To an empty shell in the matter of a few decades! The odds are that if you own machines large enough to handle parts for a D-8 you are a fabricator, not a manufacturer. Manufacturers are all in China and India now. The rest of us will be HSM's. Many of which.... like myself are retired from unrelated professions. I feel quite fortunate to own a 1960's vintage cabinet model Heavy -10 and a 1945 Logan 920. Both of these lathes were intended and billed as 'Tool Room" lathes. That said, either of the two have more American Iron in them than most of the imported offerings today. So yeah, I'm a damn amateur machinist and I appreciate any tips that make my retired shop time more pleasurable. So THANK YOU ....DON!👍👍 *Wakodahatchee Chris*
@@cdrive5757 LOL....ya'all fucked up your country by buying cheap foreign goods when you should have bought better quality home produced stuff ......if you know the difference.......you are your own worst enemy in that respect. By "in industry" I refer to the UK and OZ where I lived and worked for the last 60+ years, now retired in OZ.
I’m picking a 618 atlas this weekend. Very excited as it’s my first lathe!
Sweet lathe. have fun
Don. I Also live in Florida😄 I've got a !0" Atlas Lathe bolted to a 3/4 Slab 8" x 45"of cold Rolled That was Blanchard ground. The original bed was wood When I bought back in Michigan.
So I watch you posts with great interest. I have always watched my Slides and gibbs do a dance when I take even the slightly aggressive cut or Parting. I just rec'd a 3" round of Cold Rolled to make my compound Slide replacement.
Sounds like you have that thing mounted solid. Keep your gibs snug and lock that carriage when parting. Love my Atlas for sure. I do a lot more on it than you can imagine. Don.
Few go into the theory of why and what’s going on with tool post deletes. I love the idea of off setting the tool post from the centreline of the boss. Also, great idea with using a circular shield on the mill. I’ll borrow that one thanks.
Thanks Gary.. Don
Outstanding video---I have an old Logan...and boy you aren't kidding that the compound rest is the weak point. I am going to attempt this next weekend!!
It was definitely plus up addition - especially when cutting nasty stuff. Good luck. Don
Wow!
You made an irrefutable point, totally on target!
Good job! 😊
Thanks Arthur. And thanks for watching.. .Don
You've contributed to my education. Thank you.
Glad you could get something from it. Thanks for watching. Don
Brilliant idea and superb instructions. Just picked up a 618 two days ago with tooling on original Craftsman workbench. The owner had been given it and didn't use it. But the best part is it was advertised as an Atlas 3950 so I was pleasantly surprised. Going to make this modification in a few weeks when I pick up my mill. Do you have a recommendation on the tool post brand? Thank You
On the tool post brand.. Well, if you can swing the cost of an aloris. Otherwise all the knock offs are pretty much the same and will do the job. Good buy. Don
Don, this has been one of those things on my "To Do" list for quite some time. I wish I could add something useful but I think you covered it all; especially the offset you incorporated. I'll probably make two of them. One for my QC and the other for my 4-way turret. Hell, I might make one for my Lantern tool post too! I like options. Thanks!
*Wakodahatchee Chris"
Under certain circumstances this eliminator has been really useful. A plus positive for smaller lathes for sure. Sounds like you've got some project time you need to set aside. Good luck Don
Very interesting video and solution. It would be simpler just to put the hole in the center as you can make almost of the work on the lathe but of setting the tool post shurely helps in terms of rigidity. It's a project on my list as i have a relatively small lathe and rigidity is very important.
Yes, the smaller lathes need every advantage that they can get. Don
The only way to eliminate the bending moment between the overhung tooltip and the tool post is to mount the tool directly over the vertical axis of the securing bolt for the quick change tool post. This would mean that you'd have to make a custom tool post. You're still going to have the same bending moment between the tooltip and the QC toolpost no matter where you mount it on the cross slide.
Granted, but in this set up, I move that moment back for QCTP mount which affords a bit more rigidity/leverage advantage between the cross slide and the QCTP. The entire set up is also significantly less intrusive around outsized work to boot. In use is were you feel and hear the difference of going sans compound. Don
Great vid.
This is the second vid of yours I've watched. You earned my sub.
I have the same lathe. I'm also a beginner.
This seems to be a popular thing these days to make. I guess for small, not very sturdy lathes, it makes sense.
It does make quite a difference. I actually surprised myself. But then again. The Geometry don't lie. Don
If you used a larger diameter piece of steel for your solid tool post, your quick change tool post would have more support, and it would have better friction (more area) and leverage between the bottom of the QC tool post and the solid tool post.
Yes, for sure, I only have about 3/16 to the outer edge of the pad, and beyond that point there is no support. I used what I had on hand. If I had a piece 3/8 larger that what I would have used. Don
Very interesting video don, 👍.
Thanx KT
Don Thais a very good video, I made one like that for me milling attachment. I am going
to make this one for my tool post, my machine is a lot older then urs, it has a lot of play
In everything. I would lie to put a different motor and reverse but cannot figure out how
to keep my chuck from unscrewing, got any ideas?
Ah the great question that plaques us all with screw on chucks. I only use reverse for backing up off a die cut or an oddball cleaning need or sometimes a grind job with the tpg. Very rare to use it and with great care. Don
As suggested in this video, I went back looking for some “tricks” on stiffening up the compound/cross slide in your milling attachment video but I guess I missed it. Any advice for stiffening up my qctp set up on my 12” Atlas craftsman lathe? I’m chattering all over the place. I’ve replaced the thrust bearings in the headstock, checked my gibbs etc…. I’m not having any luck. Thinking about changing out my chuck as a last resort. Any help would be appreciated
Hi Steve. Did you see my spindle bearing adjust procedure? Make sure your spindle bearings are adjusted properly. I cover in that one, the things to be sure of. Minimum stick out from the chuck, keep your tool extended the least amount possible, tool height properly set, tool sharpness. I did the QCTP eliminator to gain even more rigidity for harder work pieces. I don't know what chuck you're using so couldn't advise on that. But unless you have just one crappy chuck with a poorly set up backing plate hanging it out an extended amount from the spindle, then it shouldn't cause problems. You may want to try turning some different materials and see if its just harder turning materials affecting it. Also is there a difference when you use a tailstock center? It may boil down to having a weak motor and the motor bogging under load. Try turning lighter to heavier passes and see where it starts chattering the most. You should be able to turn off .025 (.050 total) on most cold rolled with a good 3/4 motor. My lathe is set up a bit differently with a 1 HP DC industrial motor, pulley reduced from its nom 1740 rpm speed, and its a total beast on there. It did a lot to quell bog/chatter. Hope that gets you going. Let me know. Don
In industry I've only ever used a lathe with the compound slide on it for the last 60 + years......those that think removing it for a solid block are amateurs......of course, if the lathe is crap any modification will improve it.
BTW.......a QCTP is for convenience and if the tool overhang causes a problem that is par for the course.
"In industry"? What industry are you talk'n about? I think Don is too much of a gent to reply to your condescending comments. I on the other hand, consider myself more of a Florida Cracker. So let me set you straight. There ain't no *industry* left in the USA! We went from the most industrious country the world has ever seen. To an empty shell in the matter of a few decades! The odds are that if you own machines large enough to handle parts for a D-8 you are a fabricator, not a manufacturer. Manufacturers are all in China and India now. The rest of us will be HSM's. Many of which.... like myself are retired from unrelated professions. I feel quite fortunate to own a 1960's vintage cabinet model Heavy -10 and a 1945 Logan 920. Both of these lathes were intended and billed as 'Tool Room" lathes. That said, either of the two have more American Iron in them than most of the imported offerings today.
So yeah, I'm a damn amateur machinist and I appreciate any tips that make my retired shop time more pleasurable. So THANK YOU ....DON!👍👍
*Wakodahatchee Chris*
@@cdrive5757 LOL....ya'all fucked up your country by buying cheap foreign goods when you should have bought better quality home produced stuff ......if you know the difference.......you are your own worst enemy in that respect.
By "in industry" I refer to the UK and OZ where I lived and worked for the last 60+ years, now retired in OZ.
Hey C Drive... Looks like I missed all the fun. I tend to just pop out whatever I'm doing and move on. Appreciate the kudos though. Thanks. Don
can i order one from ya?
If I had any time. Swamped with work these days. Don
@@donsengine3158 works a good thing.
Q
sure would like to see parting run on this setup good vid thanx