This is like cocaine for a machinist, you explain nearly everything you do, no guessing. And so much to learn... keep up the good work! Edit: again the half/half approach is quite nice, I often have to drill 120mm dia to depths of 300-500mm and than roughing those to 200-215mm in dia, will try it next time!
Thanks for yet another great video. This is one of those channels where I scroll through the comments just to see if there are ongoing conversations where I can learn a bit more. Very interesting. Merry Christmas!
Merry Christmas. I have yet to work on pieces that large but that time is going to be sometime next year when I get moved to larger lathe. Your videos are definitely good source material for how to work on large pieces
at our shop, for rough cut drilling, we use self centering 3 jaw chucks, disposable spade bits, and for larger id's going from 2.75 to 11.25, we use modified trepanning stems
Hey Peter nothing better than a cup of coffee and a chunk of steel to go with it thanks for all your videos, and to you and your family have a blessed and Merry Christmas
I´m a machinist from germany and i have to tell that you are working a totally different way than i do! I´ts so nice to see how many ways u can go to your finished product! i think you are doing to really good job at you company! Keep on going I really like your videos! Greeting from germany! :)
You really should look into trepanning. That is a perfect example why it's the best way to go. If you have a minute take a look at how I do this kind of work. Thanks if you do. 👍
Take notice: the part that is shown in this video is not the actual material, it's a test/ setup parts out of "cheap" steel. The material for the real parts made from super duplex are hollow already - shown at 12:32. Btw, trepanning is really cool. I was aware of this, but didn't know the proper name. Thanks!
@@bigbattenberg Hey buddy, yeah we know that, but figured these operations would be preformed the same on the real part hits as you say a "test". Now that I've watched the whole vid again it looked like perhaps it showed the Super Duplex on those pallets for just a brief second in the video which were already a tubular stock. I should have known never to second guess Peter. lol Did you check out userwl's channel? He trepans some pretty large hard material.
Considering the time it took you to clock the raw billet up, wouldnt it just have been better to take cuts above the diameter, for example if the stock billet is 250mm, tell the programming software that the billet is 300mm or above? I liked the boring of the inside diameter in stages though.
Merry Christmas Peter. Greetings from Poland. I was afraid when you didn't use pilot hole for such a big and long hole. I have bad experience from my past. Hole was comletely bad. PS. I preffer using both rotation, e.g. 80% for drill and the rest for a part.
lol .. I learned something new .. never think of doing the roughing passes like that with the boring bar if u have long chips ... in some cases it will trash the tool and eject the part :)
Hi Peter, How do you like your Bison chucks, I got a 160mm Bison 3 jaws scroll cast iron standard chuck a while ago it runs within 0.5/100mm equal to 2 tenths. Also a Merry Christmas and a Happy New Year to you and yours.
Bearing in mind the time of year, I thought that lump of metal in the first shots was a yule log, and you was going to do some wood engraving. Anyways, Happy Christmas to y'all
A total shot in the dark here, The turning spindle is probably a lot more powerful that the milling spindle. The milling spindle would need to lock the tool, I'm not sure if it's a mechanical lock, a brake, or a magnet. But I know that locking something down and pressing against it would be better suited for the larger motor due to its increased mass, and (im assuming) higher holding power. Ie the turning spindle.
May I ask you how much the biggest rpm what you are using in a billetsize like this? It was sticking out quiet a lot in the beginning, and you hold on only 1.5” long on a rough surface. Duplex is bloody heavy as well by the way. Do you calculate somehow what is the smallest surface what you are holding in these cases? I would just turn a small register face first gently with small rpm and depth of cut, because I would worry, maybe the billet will fly out from the spindle. You are much braver then me. Do you calculate somehow or work with feeling? Thanks and great videos
The chucks jaws have serrations on them. When it’s tightly chucked the part is held very securely. Also this is a manual 4 jaw chuck. It will hold a part more securely than a hydraulic chuck. It won’t open/reduce its holding force with RPM. The speed is also limited to a max of 500 RPM in the program.
Edge Precision thank yor for the quick reply. Most of the time I do make small parts (1” diameter or smaller) and thats why it could be scary for me when occasionally I do have to work on some of the bigger machines and I can hear the main spindle mouring under the weight. Thats why I am wasn’t sure what are the rules about weight and sticking out length. But thank you for the information.
It's nice to see a new video now and then from you. But at the end it's a shame u didn't use a super easy to make mazatrol program to face-off the part and create a small deburr on the face and length of the part. No need for a manual labor. But now i'm nitpicking. 😁
I'm curious to see if you have any tricks up your sleeve for chipbreaking in duplex stainless steel. The last time I turned duplex 2205 in a small bore the chipbreaking become a huge problem for productivity. Perhaps with your high pressure through coolant it won't pose a problem.
Thanks Bill. The OD turn only goes up to the jaws. The rest gets milled away when the part gets turned around. There is actually only a small section of the OD left. If you look closely at the previous videos. You will be able to see what I mean. The new bars will be able to turn the whole ID complete from the first end. All that will be necessary is the chamfer on the other end. This ID will be held to a close size for the third operations mandrel.
I bought it from our local Northern tool store. Although I have been back to the store and don’t see any more there. It says Titan something on it. It’s a 3/4” drive.
How much programming, if any, do you do in mazatrol? When I was running mazak I know I could crack out simple 2 axis programs at the machine way faster then in cad. Thanks for video, keep up the good work.
This would have been easy with Mazatrol. I should have shown that for this video. For lathe work I do like Mazatrol . For milling I don’t care for it. That being said I very seldom use it except for boring jaws. Thanks Jerry K.
In this video a ER32 collet chuck is holding a short Noga arm. I have recently changed to using a ER40 chuck because I needed the ER32 chuck for a setup. And I rarely use the ER40 chuck. Does that answer your question?
@@Meeky815 anything that holds the indicator arm. I only used that because it was, at the time a extra chuck. A ER25 would probably be better. I could give more clearance in some situations.
If you a talking about the camera bag. It so thin I bought at our local camera store. The only thing I can tell you is it has a tag that says Think Tank on it. I don’t know if that helps.
1st step: centering 2nd step: turn diameter for back stay 3rd step: turn face and drill Also appropriate: take a chuck with 3 or 6 jaws - justify is not needed
SuperDuplex is also used in the fabrication of lightweight 300m decompression chambers in hyperbaric lifeboats....very high tensile strength to weight ratio.
David Lawrence this chamber is fitted inside a hyperbaric lifeboat. This lifeboat chamber has a docking flange connected to the ship’s saturation dive system. Should an emergency require evacuation of the saturation divers, they are locked into the hyperbaric escape chamber and the lifeboat is then locked off and launched, allowing the divers (under pressure) a reasonable chance of survival. This lifeboat and chamber is self sustaining for up to 72 hours, within which period they can be locked into a shore based reception facility, or connected too a ship based life support package, at which time they will be slowly surfaced ( usually 1 m / hr ) .
I'm not sure what you are asking? Run out is the error in relation the ideal center-line. So indicated run out is when you use a dial indicator it is the reading you get with the indicator while sweeping the surface in question while rotating the part or indicator on the surface to check. The actual run out of the center-line is half the total indicated run out.
Not when it held in these serrated hard jaws. I have turned longer than this. If it was held in regular jaws yes I would be using the steady rest to face and center drill. Do the OD than the steady rest to do the bore.
It’s kind of a judgment call. If you try to do a cut out on the end and get a bunch of chatter/ vibration you need support. I should say it is absolutely essential to limit the RPM for the facing cuts. With a hydraulic chuck it will loose grip ( open up) on the part at high RPM. With this manual 4- jaw chuck you don’t have that problem. But it’s still good to limit the speed.
I have explained this many times in previous videos and comments. But a hydraulic chuck doesn't work as well for the type of work I do. It is quite common in Houston, Texas to run manual chucks here to do oilfield type work on CNC equipment. The chucking time is so small compared to the cycle time, that the convenience of being able to push a pedal to chuck is far outweighed by the versatility of the manual 4 jaw chuck. Also the manual 4 jaw doesn't lose its chucking force due to spindle speed like a hydraulic chuck does. Its jaws have more travel so fewer sets of soft jaws are needed (sets of soft jaws for large chucks are quite expensive). Also I can get the part do run dead true with a manual chuck or even off center if required. Now all this could be done with hydraulic chicks but with more effort and time. When you only sometimes chuck a part once or twice a week what did you save. Maybe five or ten minutes. But you had to carefully bore the jaws on a hydraulic chuck. So maybe there is no time saving after all. Bottom line It's my preference.
It’s been a while. This material cert says it has over 25% chrome content. It will be difficult. They are here at Centerline making some of these parts as well. The guys running those parts say they are having trouble with inserted milling tools (feed mills). But carbide endmills are holding up OK. We shall see.
You are correct but sometimes things are not the most ideal. Especially when I decided to just run the same program and not make a new one. In other words I was being lazy.
