Power Drawbar -S03E11 

I'm surprised nobody is giving you crap for not covering your lathe ways while grinding, yet. I once left a key in a lathe chuck in an online pic, still hear the ghosts of past machinist haunting me.

Hey guys. Mad old school props for not only rubbing the paper on the surface to transfer the shape and freehand drawing the plans instead of using cad but also using a freakin 35mm canister for the radius you wanted. Niiiiiice.

Ahhh. So that’s how a power drawbar works. Bypass the ‘spinny spins’ entirely. I really enjoy watching your workmanship while problem solving, Guys. Thanks for the truly enjoyable videos. I look forward to them.

I remember a time when a poor, lonely lathe was given care love and attention, being fully restored, until it was discovered it had a crooked bed. Attempts were being made to prepare a machine to help the, uh, helpless lathe get straightened again. Please, if you see a lathe in need and give it all the love and it needs, to help it and you stay on that ONE path.

Immediate sub, production quality and content is awesome. Also the unicorn and heavy metal music had me sold. Side note: i went down the galvonic corrosion rabbit hole researching firearms grease with graphite in them . Spent probably far more time then I needed to before realizing it not really the big deal people make it out to be in most situations.

Wow. I thought I was the last Lightwave user; it's nice to know others still use it. I have yet to find anything that is as useful as Lightwave. Neat.

Power draw bar...cloud chambers -- whatever man, keep the videos coming! Have a great New Year!

The unicorn image gets better every video!!!

I just Googled power draw bar and then checked my email and here you are. Now that is delivering quick.

I love your videos but I wish you guys would show and talk a little bit more about how you built the part and also show in more detail how it works. I think it was only a few seconds at the end where you showed the drawbar in operation. I found myself rewinding several times to try and get an idea how it all works together. Maybe an explanation of the junction block I guess you’d call it and the the rest of it etc

That’s pretty darn cool!!! Love the spiffed up rainbow unicorn!!😬

Impressive project and execution 👌🏻

Good stuff. IMO you should add an interlock that positively prevents activation of the power drawbar if the spindle is turning.

Nice fool-post grinder ya got there.

Guess that spindle shaft was harder than woodpecker lips!

Nice build. Angle grinder to the rescue ... why not :)

Please for the love of humanity finish the Lathe.....

Music in videos is often distracting at best but this music I liked. You also have a good sense of what detail to include as the length seems perfect. Also, I worked with Bellville washers for years and never learned the science of their application so thanks for that.

Oof, Pro E, bless you I had to teach that as a grad student back in the day...Catia V5 was a godsend 😂 now I just use fusion like everyone else :P Also hey, NASA engineer pals!

ah yes, abrasives on the lathe ways, always good to see

I feel like i am in love with your channel again 🙂❤

At the end... I'm glad you were standing together as the blue "T" was looking like medical scrubs, not sure if you were taking the task too seriously!

Can you put a link to the exact model of fabco multi stage cylinder and washer. I have the same machine and have been wanting to do this upgrade for a while but do not want to have to reinvent the wheel as the understanding of all the things to learn is out of the scope of available time.

very good power of the drawbar..thanks for your time

A different take on the grinding wheel controversy: Seven episodes ago: Makes tool post grinder for the lathe. This episode: Takes hand grinder to things on the lathe.

Killer video. Loved it

Awesome job!

I like the music you play in your videos, yah!

What is the part number for the cylinder you used and washers, if you don't mind

Do you happen to have any more info on the air cylinder? I am also getting ready to build a PDB on my PM25 and like how compact this air cylinder is compared to the others that guys use.

What model is the cylinder? I looked for it in the comments and the description but did not see anything.

Hahah 😂. Poor Bink!! Great video guys!! Might have to close down my shop for a few days and make another trip up and come learn in your lab!!

That's numberwang! @ 6:18 or did I just imagine that?

Clever!

LOL, "Good Humble Brag".

Just one comment: unicorn t-shirt

Any chance you’re going to produce a kit like this or sell plans to do so I have the same exact Mill and I can’t find plans to do a PowerDraw bar anywhere I would totally be willing to buy a kit if you’re going to sell them or willing to sell one??

You guys are gone for 2 months now... Got me worried. Hope everything is going well and you are just enjoying your time!

8:20 all good machinists know the importance of seasoning your cast iron skil- bed ways ;)

You totally should build the Clough42 electronic leadscrew. I hear it's pretty adequate. :)

Hi, armchair engineer here (youtube certified). That file in that retaining ring groove you machined, that seemed really dangerous.

I rewatched your video partly for the heavy metal unicorn but mainly because it was placed in my feed again and I always enjoy them. However, when I first watched it, I did not realize you attempted to lever the air cylinder and gave up when you realised it would put pressureon the bearings. You could have a created the same or similar setup by continuing with the lever with an offset cam and connecting it to forks that would slide with the lever to grasp the spindle. Turn the air cylinder horizontal instead of vertical and when activated, it could slide forks to engage the arbor then continue in a pinching motion to release the colet. I doubt it would be less work and the solution you used is in and of itself fine. Just wanted to let you know you weren't entirely off in your initial attempts. You could have rube goldberg'd it together. Anyways. Thanks for the heavy metal unicorn!!! And thanks for the the awesome vids.

I really enjoyed the show on the linear tool release, but it seems to be limited in application to a “collet” for tool holders with a common shank diameter. This is similar to the retention knobs on Cat and BT tool holders. In a R8 spindle, there would not be any way to change out a collet, nor enough diameter for anything else. A NMTB 30 replacement spindle might give some chance if you could devise a working retention knob, collet, and closer ring, that would work inside the replacement spindle. If I have publicly shot off my big toe with these observations, I would certainly like to be enlightened, as it does seem to work well, and likely consumes much less air than a pneumatic impact wrench commonly seen on top of a Bridgeport. Thanks again for the presentation. It is a real mind opener for the person looking for a new method. I also like your 3D tracing paper for transferring contours to plate stock.

Freaking awesome!

May need some more pressure on the tool, my draw bar is applying 3700 lbs. no pull out at .150 stepover 1 1/4” doc at 20 ipm. 1/2” three flute Alu power end mill.

Yeah, I'm still not entirely sure how the de-coupling when running the mill works. :/

Verry nice build! :D

You should take all of your "reading/responding" to comments portions of your videos and make a compilation video, or a playlist. That would be awesome!

This got me so goddamn confused. You said you used a 4" air cylinder. The part number shows a 2-1/2" cylinder, 1/2" stroke, 3 stage. That only does 1656lbs at 120psi according to Fabco's product documentation. It's '4.0" EQUIVALENT'. You have a 2-1/2" piston cylinder. You're not getting 2200lbs of force. Those max at 150psi which is only 2070lbs, and I doubt you're running it at that? Am I missing something? (and sorry to be curt, but I'm trying to understand all this myself completely before finishing a design & buying all the hardware)

Looks like a new (awesome) PA-specific unicorn... where’s the T-shirt (PA logo on the heart, DMU on the back).

Tox Pressotechnik sells things called pneumatic-hydraulic cylinders. where piston works on air pressure but inside, is hydraulic mechanism. So the thing puts out 2 to 2000 kN on regular 8bar air, ofcource you miss out on the travel distance for the force.

Lightwave was gpod enough for Babylon-5!!!!

I'm new to machining and milling.. but at 05:18 is that a Broach, and doing what is called cutting a keyhole or broaching a keyhole? Trying to learn the TTT. Tools, Techniques, and Terminology.

Could you please tell us the model number of the cylinder, and which bellevilles you used?

Assuming German smoke detectors are to EU standard, and i'm sure they are, then they can be of any type depending on situation. They could be ionisation, optical, or even combined to catch both fast flaming or slow smouldering fires. In harsh environments they could be fixed temperature or rate-of-rise.

Galvanic corrosion: Have you ever tried to loosen the steel fitting on an aluminum oil cooler? Good times.

Are you guys still liking the PM-25? Seems like it's still getting a share of the work.

Clever bastard. Good job.... All goes downhill at 11:59

Please make my New Years wish come true, make an ATC for that Mill now! I am following along because I will be buying the same mill this year. I bought an Acorn cnc controller to use with it.

Now I really want to know what Bianca asked.

is there a place where i can find the design specs and parts list with numbers i can use to build this gizmo? Thank You...

i have head pain when i see angle grinder, lathe bead and ANY PROTECION BLANKET OR SOME KIND OF TOWEL OR ANYTHING. Good luck wit corund dust and lathe rails. I NEED SOME KIND OF PAIN KILLERS

doin_it_the_hard_way.mp4 but still fun to watch!

Another informative video but be careful with Belleville washers as there not designed to be bottomed out in normal use...

Did you get your surface grinder finished or just put the lathe back together?

Using a snapring to transfer theres kind of loads is not ideal. Especially with your super-precise ground groove. Although you're probably going to be fine, I'd keep an eye out for that. Also when using these springs in parallel you have quite a bit of hysteresis due to friction.

What model Air cylinder did you go with? I'm getting ready to do a Power draw bar on similar sized machine and not looking to reinvent the wheel.

abrasive dust from grinder cant be good for ways?

My wife shouted " what are you swearing at" I said "look what he's doing to the lathe !!" For such a smart cookie that was a daft thing to do with the grinder. Still a thumbs up though.

Wait what, you are just changing the tool and not the tool holder + tool? Is this not messing up your tool offsets every time you change a tool?

Hi, I have an old Chiron Dz18w spindle. Do this drawbar work on it? I'm afraid it doesn't generate enough force for my spindle

Sweet build! When are you getting to the flux capacitor? Cheers

I have looked at your website. I cant find anything about this power drawbar. Did you ever post any info on this. I have a different mill but I am sure I could replicate your version almost perfectly and it would fit my mill

Yeah.... I end up spraying grinding dust all over my lathe ways too... so I'm not allowed to offer the slightest criticism.

You dropped the spindle........

So did you ever grind the ways of the lathe

Yo what IS THIS SONG

Argh, good grief! Angle grinder, right down the unprotected bed ways! No! Bad machinist! Bad!

It hurts me to watch those lathe ways have sparks thrown at them!

How does the drawbar hold the tool holder?

Cover the lathe bed when using angel grinder or sand paper.

in what program does the simulation take place ?

Would you please give me some Power Drawbar information : F= ? Newton (N) , p= ? bar . Thank you.

Lightwave? is that from 1984 hehe. Bender 2.8 UI is much easier than the past.

So when are you going to build a complete CNC Machine Tool and compete against Haas and Hurco?

RE: Peltier - do you watch Tech Ingredients on YT? They made a series of awesome videos on Peltiers that are really really good. Not saying you shouldn't make one as well. Just throwing it out there. Also. When are we getting metal unicorn shirts?

you already did a surface grinder , are you going to make a round grinder/tool grinder as well and a grinding attachment for the lathe

PLEASE can you provide the details for this build in your comments. Part numbers for the off-the-shelf components used would be super helpful. FYI, I subscribed after watching two of your videos - which may be a record for me.

Why don't you make one fixed support?

Do you not need to change collet sizes? The posts supporting the air cylinder seem to be in the way of turning a wrench to go to a different collet.

I miss your friend. Where is he? 12:07 There he is!!!

Hello, what's the outro music please I love it

how quickly do you expect the washers to fatigue and need replacing?

are you guys using the tormach tooling system or are you using a different tooling system

Interesting projects but... ... I'd definitely prefer less pretty pictures and more information.

WHAT DID BIANCA SAYYYYYY

Holiday Seasons Greetings, and Nice Unicorn. What is the psi of the air compressor please? As for the Angle Grinder on the Lathe,... Tell those the down it, The Lathe is a Machine, That is Designed to handle the Swarf from that Hard Heavy stuff we all know as Metal.

LightWave rocks! Converting to Blender would be a serious downgrade and you'd gain nothing but pain, so please don't.

hard turning? CBN tooling.

Could you helo us with the part numbers and suppliers?