Glad it helped. I do have some more recent videos, mostly focused on converting to an electronic lead screw controller so I don't have to mess with the gears anymore. I plan to finish that project (adding the other axis) soon.
Best way to external thread is in reverse. Cut a starting groove and then there is no worry about the end of thread, no crashing your equipment. You can still keep your feed locked if you can't disengage leed screw. I did it on my first attempt at threading. I hope you can give it a try. Joe Pieczynski's channel is where I learned it. Good luck.
I saw Joe's video when it came out, and thought it was a great idea. The part I'm going to be making has internal threads, and I will definitely be using this technique to ensure I can precisely control the start location at the bottom of the bore.
Hey John, very helpful video, where can you find a set of gears to do threading on this lathe? I've been looking for a set for some time now for mine and not sure where to look.
Love the information...I just bought an Emcomat 7L and it really help me to see how everything fits together! I have a question...My lathe has 380v three phase motors and I bought a 220v to 380v VFD to supply the correct voltage, but I don't know how to wire the VFD to the input of the switching box. Can you help me with this?
Hi John - great video - thanks. I just got a Maximat 7 with a set of change gears, but no extra shaft assembly. The one you show was the wrong size, and must have come from a different lathe. - Since you made the video, have you discovered where that shaft came from ? The Maximat 7 one is hard to come by. The mod you did is an easy fix. Any idea who made the one you show. Thanks for taking the time to do all this.
I finally found out .... I bought and put the most expensive oil I found SAE 10 for the lathe, and high compression and high temperature grease for the mill head. thangs
Hello there. Recently i have purchased an emcomat 7 like yours. But the tailstock is missing.. The guy who has it, cant remember where is it. Do you know someone to sell the tailstock? Good job btw. Thank you in advance.
There is an ebay store I'm aware of, but they appear to be out of stock at the moment: www.ebay.com/itm/EMCO-Maximat-7-Lathe-Parts-Accessories-Free-Ship-Choose-Your-Parts-/153662948873 If you're on Facebook, you can ask on the Emco group: facebook.com/groups/407296116378626/?multi_permalinks=1138549196586644
Thank you for your very clear and useful video. I do not have an Emco lathe, but I do have an interest in gear trains and wrote a free online program for automatically calculating what gears to use for any thread pitch. Users of the Emco may find this useful, especially if some of the gears are missing. The web site is www.HeroSteamEngine.com/RideTheGearTrain. The terminology I use is a bit different. What I call the stud gear, Emco call gear W. What I call the Leadscrew gear (or LSG) they call gear L. The gears in between could be none, one, or two compound gears. In the setup you demonstrated for a 1mm pitch, the stud gear has 40 teeth, then the gear with 50 teeth is an idler which does not contribute to the overall gear ratio. It basically fills the space and reverses the direction of rotation. Then there is a compound pair. They are the two gears connected together with your black adapter with a key. They formed a driven gear of 55 connected to a driving gear of 65 as a compound pair. They alter the gear ratio by a factor of 65/55. Then finally the 65 gear is connected to the leadscrew gear with 75 teeth. The stud gear and leadscrew gear contribute a gear ratio of 40/75. So the overall gear train ratio (GTR) is 40/75 x 65/55. We multiply that by the pitch (or TPI) of the leadscrew itself. Actually, the program does all this for you. To use the program you need to know the pitch (orTPI) of the leadscrew. If the leadscrew is measured in mm it is considered a metric lathe, otherwise it is imperial using TPI (Threads per Inch). I hope this is helpful information.
Thanks for the video. This answered a lot of questions I had. Much appreciated! Make more Emco 7 videos!
Glad it helped. I do have some more recent videos, mostly focused on converting to an electronic lead screw controller so I don't have to mess with the gears anymore. I plan to finish that project (adding the other axis) soon.
Best way to external thread is in reverse.
Cut a starting groove and then there is no worry about the end of thread, no crashing your equipment.
You can still keep your feed locked if you can't disengage leed screw.
I did it on my first attempt at threading.
I hope you can give it a try.
Joe Pieczynski's channel is where I learned it.
Good luck.
I saw Joe's video when it came out, and thought it was a great idea. The part I'm going to be making has internal threads, and I will definitely be using this technique to ensure I can precisely control the start location at the bottom of the bore.
I think the dial on most lathe's cross slide read out in diameter, not radius.
Hey John, very helpful video, where can you find a set of gears to do threading on this lathe? I've been looking for a set for some time now for mine and not sure where to look.
Love the information...I just bought an Emcomat 7L and it really help me to see how everything fits together!
I have a question...My lathe has 380v three phase motors and I bought a 220v to 380v VFD to supply the correct voltage, but I don't know how to wire the VFD to the input of the switching box. Can you help me with this?
I have no clue. Mine came wired for 110V.
Hi John - great video - thanks. I just got a Maximat 7 with a set of change gears, but no extra shaft assembly. The one you show was the wrong size, and must have come from a different lathe. - Since you made the video, have you discovered where that shaft came from ? The Maximat 7 one is hard to come by. The mod you did is an easy fix. Any idea who made the one you show. Thanks for taking the time to do all this.
I finally found out .... I bought and put the most expensive oil I found SAE 10 for the lathe, and high compression and high temperature grease for the mill head. thangs
thanks for the video, I want you to tell me please what oil number and more put more in this lathe, I bought the same, thank you
I don't know. I did a quick search on the Internet and found this: www.chaski.org/homemachinist/viewtopic.php?t=77158
and what number oil nead the trill head
Hello there. Recently i have purchased an emcomat 7 like yours. But the tailstock is missing.. The guy who has it, cant remember where is it. Do you know someone to sell the tailstock?
Good job btw.
Thank you in advance.
There is an ebay store I'm aware of, but they appear to be out of stock at the moment: www.ebay.com/itm/EMCO-Maximat-7-Lathe-Parts-Accessories-Free-Ship-Choose-Your-Parts-/153662948873
If you're on Facebook, you can ask on the Emco group: facebook.com/groups/407296116378626/?multi_permalinks=1138549196586644
Thank you. Appreciate your quick response. I will check it out..
Thanks for the interesting video. Take care.
Glad you enjoyed it
yay
when you change to a stepper motor be sure to sell me your change gears! ;)
:-). That might be an option. Right now I'm waiting for the controller I ordered to arrive from Germany. It's been almost two months...
Looks like my 8.4
Thank you for your very clear and useful video. I do not have an Emco lathe, but I do have an interest in gear trains and wrote a free online program for automatically calculating what gears to use for any thread pitch. Users of the Emco may find this useful, especially if some of the gears are missing. The web site is www.HeroSteamEngine.com/RideTheGearTrain. The terminology I use is a bit different. What I call the stud gear, Emco call gear W. What I call the Leadscrew gear (or LSG) they call gear L. The gears in between could be none, one, or two compound gears.
In the setup you demonstrated for a 1mm pitch, the stud gear has 40 teeth, then the gear with 50 teeth is an idler which does not contribute to the overall gear ratio. It basically fills the space and reverses the direction of rotation. Then there is a compound pair. They are the two gears connected together with your black adapter with a key. They formed a driven gear of 55 connected to a driving gear of 65 as a compound pair. They alter the gear ratio by a factor of 65/55. Then finally the 65 gear is connected to the leadscrew gear with 75 teeth. The stud gear and leadscrew gear contribute a gear ratio of 40/75. So the overall gear train ratio (GTR) is 40/75 x 65/55. We multiply that by the pitch (or TPI) of the leadscrew itself. Actually, the program does all this for you.
To use the program you need to know the pitch (orTPI) of the leadscrew. If the leadscrew is measured in mm it is considered a metric lathe, otherwise it is imperial using TPI (Threads per Inch). I hope this is helpful information.
1" =1 thread dubal start
Hello Professor, I would like to translate your words into Arabic.