Testing the BIG Boring Bar | Shop Made Tools

In this video we are using:
- LZMT CW6280D Lathe

In this video we are using:
- TM-26120G Centre Lathe
- WIA 500i Weldmatic welder
- HMP-150T Hydraulic press
- BM-63VE Milling machine

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Our channel is all about showing you real life machining work from our workshop on the Gold Coast Australia. We specialize in manual machining, hydraulic repairs and heavy fabrication for the earth moving, mining and civil construction industries. So if you're a machinist that wants to see some big gear in action be sure to subscribe to our channel right now. We upload new videos every week that show lathe machining, milling, welding and all the good stuff that comes from a machining workshop. If that sounds like something that you would enjoy seeing, then make sure to join us by subscribing!

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[CuttingEdgeEngineering]

Subscribe and hit the bell icon to turn on notifications so you don't miss our weekly uploads. 👇 🤳
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[nviduumde]

Even though you weren't comfortable to do the first test on camera, it shows once again, what kind of skill, knowledge and feel you have for your craft. It is a joy to watch these videos. Thank you for making and sharing these videos, guys.

[jonathanfenne]

As an ex Cincinnati Machine Tools Dev Engineer, I'm very impressed with the boring bar, and general stiffness of the lathe.
I relive my machining days through this channel! Great stuff.

[QuakerJT]

Nobody mentions it very often, but kudos to the one who does the camera work in your videos (not just this one). Very well done.

[G]

That’s pretty much how we used to do it at the Rolls Royce Experimental Works in Derby back in the ‘70s. The bigger the bar the better. More mass equals more stability. Small steady cuts. What you’re looking to avoid is vibration in the bar and the work. Both can play on each other. I remember one of my worst experiences was boring large diameter blade rings at the main works on nights. Those things used to squeal like banshees! The only thing worse grinding in the shop nest door.

Thank you for sharing

[michaelcothran]

Just a heads up, when I've made extended bars I solved minor deflection issues by drill & tap back end of bar & added weights, also helped with vibration in heavier cuts, great show Kurtis!!!

[johnd]

The deflection upon reflection is perfection lol

[neilfairless]

Wish i was experienced enough to suggest something but i have no clue, i just like what you do Kurtis.

[mick_]

A true perfectionist doing extensive testing which is the responsible thing to do...it’s the only way to guarantee your product so you can be 100% confident that it works...great job Kurtis

[DudleyToolwright]

That was really interesting, especially the bit about measuring the tool post deflection. It puts a perspective on things.

[johnquinn]

Fantastic all the way around !! I wouldn’t have a project on my 10” lathe that large, but your demonstration is so detailed I could make one on a smaller scale. Great narrative, camera angles, and fun with Security- thank you.

[Woodie-xqew]

As someone who knows very little about machining and lathe work, a video on the different kinds of inserts and when you would typically use them would be very interesting

[scotttipps]

You don't have to explain yourself on here mate. Most of these keyboard commandos have never even laid eyes on a lathe much less ran any piece of machinery. You do you bro, your knowledge and skill will always outshine the naysayers. Cheers mate.

[ingelboender]

Didn't expect the test footage this quick. This is a nice surprise! 👍👍

[michaelwildman]

Very nice. We had a big bar where i worked in w.a. for BHE rebuilding hydraulic cylinders. We used a boring bar which needed the toolpost to be removed and bolted down on the toolpost mount. Bar was approximately 1.4m long. Only 110mm diameter. We used 16mm left hand turning tools and found the TNMG .8 RAD inserts to be very good. We used to spin job at 120rpm 2mm depth and .4 feed let the tool bite down and stay down. This was used when boring out front strut rods on the 797 dumpys.
That material looks very soft which will be harder to control chips. Coolant will help making the chips more brittle and get a better chips.

[ZENMASTERME]

This is very serendipitous, I was just binge watching Cutting Edge Engineering Australia videos when I got my notification from this epic channel!
👍🏽 🐕

[johnyoungquist]

Clearly an essential tool for a big lathe with big workpieces. I never seen one this size commercially available but I have never looked. I have a 2 inch diameter, 18 inch long bar that I thought was big. Nice to have the raw material around to build such a monster when you need it. I don't have any cutting tools that I need a crane to lift. Very interesting as usual. Nice job.

[robbbranche]

This is a precision made tool....there was never a doubt! And judging by the outtakes we can assume it was a test!! Brilliant work Sir! Hi Karen! Hey there Homeless!

[frick]

Great answer on the deflection question!...and your "answers" to help with the deflection problem is spot on!

[davidmotoman]

well that answered my question Kurtis. It works very well for something so large. Well done. Thank you for taking us all on the journey mate.