Making a Line Boring Bar | Arbor Press Restoration
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- Опубліковано 9 лют 2025
- Today we're putting together a line boring bar, but the twist is that this one is for use in a horizontal mill. You'll see us put the glorious American Tool Works Co. lathe to work along with the Bridgeport mill, among other things - and we have some nice broaching action for you, too. Thanks for swinging by and enjoy the video!
Instagram: @vanovercustoms
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Your delivery and presentation style are awesome, very efficient. You answer the questions in viewers' minds. And you credited JT!
Thank you
I worked in a shop that rebuilt rock crushers back in the late 80s. The shop had stuff they had built out of all used stuff. I learned alot the hard way. I wish the internet would have been around back then.
Yeah it would have made life easier
My new favorite machine channel. Love your work and presentation.
Wow, thank you!
I think I found my new favorite channel.
Awe thanks
You have a lot of good ideas. Thanks for showing us.
You are so welcome!
Man I love that Pacemaker! My first lathe was an old Monarch series 60/61 and I thought it was smooth and massive…until I saw a Pacemaker in the machine shop at Bonneville dam Powerhouse 2. What a machine!
They are great machines
Great job. We shared this video on our homemade tools forum this week 😎
Awesome! Thank you!
Nice job. I'd be nervous with the broach, too. And I really think you should scrape the bottom of those angle plates. 😉😂
Who dare tell me to scrape….. lol. When I made those did not even have scrapping stuff. But I do now.
Rigidity and stiffness are the same thing. Hardness is the resistance to localized deformation. When you talk about hardness in metals, you are usually talking about abrasion resistance, toughness, and wear resistance. After heat treating for example, stiffness does not change, but hardness is improved and the yield strength, and tensile strength are improved. Yield strength is how far you can bend something before it deforms permanently... This sounds like it would affect the stiffness, but it doesn't. This topic is confusing and widely misunderstood... Love the channel and the content. Cant wait to see what you come up with next!
Yep figured we would get some comments on this. There is a good couple posts on practical machinist where people argue over stiffness, rigidity, and hardness. I think for how this bar is being used it shouldn’t matter to much. I am in agreement with you. Thanks for watching.
www.practicalmachinist.com/forum/threads/steel-stiffness-rigidity-question.239352/
www.practicalmachinist.com/forum/threads/boring-bar-material.157758/
@@VanoverMachineAndRepair 100%
Biggest thing about pushing a broach is the proper clearance drill and a firm steady push with lots of lube. Make sure the work piece is FIRMLY held in place. Hydraulic press is best. I have done thousands of holes. Make sure your broach is sharp to reduce friction. Dull broaches are harder to push and will cut under size. 36 year aerospace career (retired)...
Great tip! Thanks
I like to drill the hole for broaching and then use a 1/4 endmill to mill it square and then use the broach to finish out the corners. This helps to keep the broach square to the bar. Also on the mill we usually put the bar right down in the t slot and clamp it. this acts like a really long v block and you dont have to keep repositioning the shaft in the vise.
Yeah both great ideas. Thank you
that turned out great!
Thank you
great job
Thank you
1:21 I just bought a 1/4" full square broach! .. It came in a tube exactly like that one red caps an all ... perhaps it's the same brand?? :)
Yeah Dumont makes most of the broaches
I really enjoyed your video.
I thought that perhaps if you would make a jig with a hole squared the size required for the job, that would be used to for the sole purpose of squaring the broach vis a vis the axis of the bar, could greatly improve the alignment. But I realize that for your purpose it is not super critical... To me, there is good value in this type of exercise.
Well done also on the two angle bar supports. Also nice to say it came from Mr. Tupper. He has a great channel as well.
Thanks for sharing and posting!
God Bless.
WWG1WGA
Thanks I appreciate it
If you drill the center doesn't that put your tool bit above center of bore?
Yeah it does but sometimes it doesn’t matter. Especially using boring bar style insert where inserts are half the shank of the holder. On certain bore sizes it matters more than others. Benefit of running it center is it allows bar to be run from either side. Otherwise bar would be directional.
@@VanoverMachineAndRepair is there any reason you would run a bar in reverse?
I don’t think reversing is a good excuse as you can simply flip the boring bar end for end to run it in reverse not that I have a reason why it would be an advantage.
I caught the issue with the holes being on center/cutting edges off center too and I think it would be better to have the cutting edge on center.
I like the big red vice fella. What brand, cost and how did you find the beast ???
Fireball tool. Check their website
@@VanoverMachineAndRepair Thanks
oh wow good timing
Thanks man
Man... I was wringing my hands and yelling at the screen while you had that piece of strut under the work. F'ck me... that was unnerving. Gotta keep the broach square and parallel with the hole the entire time. The smaller the broach the more critical this becomes. An 1/8" broach will snap just like a toothpick just by breathing on the press handle if these conditions aren't met.
And, I might add, that sure is a nice looking chuck to be ruining by "power tapping" without a tap holder.
Thanks for your opinion
13:49 ... That's perfect!! ...
Unless the material is like 3/16" aluminum plate?? An for some reason (like it's art work ..the appearance of a perfectly square hole, is paramount) ... Do NOT try for a 100% square hole!!
90% is how it's meant to be .. so it functions as a square hole :)
Yes indeed
Did you make a mistake with your hole placement?
The cutting tools you show in your boring bar have the bits to one side and it seems you marked and drilled your holes on the center. This means your cutting tool will be working off center.
I believe that your holes through the bar should have been offset so that the cutting edge is located at the center of your boring bar.
I don’t know how important it would be as the impact will be on the cutting angle and reliefs. Just asking as I am trying to plan how to build one myself and searched out this video.
You can do it either way. I did it in center and used boring bar style cutters which step down to be on center. The benefit of on center is bar can be run in either direction but you need to use stepped bars to get on center. Larger holes don’t matter as much because of clearance. I looked at other manufacturers and each one does it differently. Honestly in future I would just do holes instead of squares. The boring bars are round anyways. It would save time and work fine. Plus drilling on center or broaching on center is easier than offset.
One video I used sure cutters off center another line boring I used rounds cutters on center. Typically square ones are lathe tools which the insert is in line with shank. Boring bars step down so insert in on center of bar.
Will the broach shatter if you drop it?
It can
Лучший асмр на планете, и звук техники и голос. Просто оооуумй
Thank you
Where you bought the bar and how much
I had it on hand got it off Craigslist a while ago with a bunch of other metal
Do you happen to have a name for the device you made to keep the bar "clocked" so all the holes you drilled on the milling machine are inline?
I am not sure there is a name but I don’t remember
Is it called a Rose index?
@@nealpedigo2842 thanks for giving me the right name. It's amazing what comes up when you have the right name to search...
what was the diamiter of that bar?
1-1/4
👍
Thanks
Where do you purchase bits and taps and cutters? Etcetera. Love what you’ve been doing. Fascinating and I know little of what you know. Best Regards
All over. eBay, McMaster Carr, carbide depo, Amazon.
Why did you need to make the holes square. Could you not off just used round holes with a flat for the securing screw to stop it from spinning and to hold it at the right depth. ? I have really no idea I just enjoy watching people linebore. Just a thought.
Yeah both work just different tooling works each. Square shank has more options (lathe tooling)
How come your arbor press is wiggling back and forth? That would not be acceptable to me.
? Where at
@14:53, unless that is camera shake
Your Arbor press needs to be on a rigid base.
Check the new press
Why not spot it drilling on od?,drill less chance of walking, good habits
Indeed. Good habit. Some times I do it. Sometimes I don’t.
Sounds like 4440 bar
Lol true
I have skill for wood working,wood carving welding.... etc Are you hiring helper? 😊😊😊
Where do you live
@@VanoverMachineAndRepair I am from Sri Lanka
You what really troubles me on these UA-camrs . Is when they buy Chinese tools and then complain about the quality
I know right
@@VanoverMachineAndRepair😂
⭐ "promosm"
👍