Line Boring On Small Lathes!
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- เผยแพร่เมื่อ 16 พ.ค. 2024
- This episode on Blondihacks, I’m setting up to do line boring! Exclusive videos, drawings, models & plans available on Patreon!
/ quinndunki
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I found the main issue with this style of boring to be swarf evacuation. In a longer bore it gets quite stuffed up. I ended up milling a flat all the way down the bar to give the chips some room to move in. Have a look at 'machining cylinders part 2' for similar work. Cheers, Crispin
Yes, excellent point! In my case I have a lot of material to remove and it’s cast iron, so it will have plenty of space. A flat on the bar is an excellent idea. I’ll remember that one!
My favorite line boring tip that came from a subscriber is to put the cutting hss blank at 45 degrees to the bar center. That way you can use a micrometer to set the cutting radius and also you get fine adjustments as at 45 degrees moving the cutting tip out 0.002" only puts 0.001" on the cutting radius. Again all in machining cylinders part two Incase that was confusing.
Ooh, that’s another great idea
Hi Mr Crispin! Do you still use your brother's toothbrush? Oh my god, it was so fun!!
@@Blondihacks Hi Quinn! I don't know how to send you this link in a not-so-public way, but I guess you can delete this message anytime, so... please, check this out!!. Its way better than netflix!! 😃
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Loved this video as is tradition. Best content since cat toothbrushes. Please keep em coming. 🥸👍👀💥
Genuinely LOL’d at the clickspring reference 😂
I was trying to remember why line boring looked so familiar, then recalled that it’s the method used for creating the spindle bearing bore on the Gingery lathe. Very cool video 👍
Back in the day when I first got involved with lathes, we called it "saddle boring" because the carriage is called the 'saddle'. Only ever did this once, to rebore the cylinder off a traction engine. Worked a treat... a quick freehand hone afterwards and it went back on. The lathe was a 12" (not exactly small) but the cylinder assembly (pretty big and weigh about 35kgs) just fit with a couple of wood packers to position it on the saddle. Happily it had 'built in' mounting holes that we used to clamp it to the saddle, which saved using clamps etc. As we had to made a new piston, the bore diameter was not critical...we made the piston to fit.......If memory serves (it was close to 60 years ago) we bored it about 1/16" over nominal as it had been pitted by being idle for a long time and we just wanted the pits out.
With the bar between centres do nice deep centres in the bar for max ridgidity.
With the fancy boring machines that are more common today, saddle boring is rarely used and many machinists have never seen it, and in fact have not heard of the technique.
Great video to remind us home machinists out there that there's more than one way to skin a cat.. :-)
3 minutes after publishing:
135 views
35 likes
17:14 long video
25% viewers hit like before seeng the result.
It just shows how high quality videos you are doing. The machining Quinn! ❤
Absolutley epic 👍
Totally agree! I like before I've even started half the time as you just KNOW its going to be fun, educational, and interesting simply cause Quinn make it.... I don't own a lathe, mill, or anything... I just like watching and learning interesting things even if I have no actual way to use that knowledge!!!!
Do patreon's get early access to videos? Maybe that's where some of the likes come from!
I will sometimes like before the end of a video, because I truly have been excited by the content. In this case I liked after I got to the end. When I decided that this could be useful to me.
TH-cam caches counts. More frequently occurring events are more likely to be out of sync.
Drill your broached hole on the none cutting side and run some fine threads in it. Use a fine thread set screw for a micrometer style adjust on tool depth. It is quite convenient.
Very cool idea - 😊
I was wondering if that was an option!
Yea, I was thinking it would be something like a fly cuter.
The GHT approach
Quinns video is great introduction to this subject but I like the idea of tapping a fine thread down the hole to be broached, I've since tried it and it works great, thank you.
Once again, subscribers to this channel, You'll not see nothing like the Mighty Quinn!
Thank you so much for this video.
Was just thinking about Clickspring when you made the comment, ha! That clock was a fun build to watch through.
That's not a bad analogy about software. Mechanical engineering, machining, and software share similar test methodology. Perform unit testing on the individual components to ensure they work on their own, and only then do you do integration testing. Same way to diagnosing any problem - limit your variables and you'll find what's messing up much faster (or at all!)
Blondihacks explanations are so clear. She should teach in technical school. I would add a set screw in the back of the HS knife. That would allow to set the knife depth precisely as I bore.
1:45 Whaaa? LOL This is one of the two things I love about Quinn, surprise and humor. 3 things, surprise, humor, and ruthless efficiency FOUR, 4 things, surprise, humor, ruthless efficiency, and nice red uniforms... Amongst the things I love about Quinn, are
Oh I'll come in again....
I've been lineboring for many years, well done. I prefer to leave the cross hole in the bar round and use round tool bits, broken endmills and drill bits work well for this with a small flat ground in them. The set screws will hold things in place well enough, think welding shank. On larger jobs I use 3/8 and 1/2" sclcr boring bars cut down to length with ccmt inserts. I also like to tap the back side of the tool bit hole with fine threads so the diameter can be set with a set screw. I also have hollow bars made with very heavy wall tube that allow coolant or oil to be pumped in to the cutting edge for deep boring jobs. A quick connect air fitting on one end works well enough for a rotary union for the low rpm these jobs run at. Plug the other end and drill a small hole on either side of the cutting bit to allow coolant to pass through right to the cutting edge.
Excellent idea on internal lubrication.
Blondihacks showing some real old school badass machineing. You are one hell of a machinest. Thanks for sharing.
I got to say. I have learned more from you in two weeks than the last four years from the others.
Of course, line boring can make multiple co-linear bores the same size (such as the main bores of an engine block if the caps have been resurfaced. )
Did you consider making the end of the bar match the spindle taper (which is what I guessed, given the recent taper video)?
I was the boring guy at our shop back in the day. Or so they said.
As an amateur using old lathes (with old chucks), let me echo this sound suggestion. Having a boring bar that plugs into the mandrel taper increases the stiffness of the bar enormously.
As many times as I have read about line boring, this video made it all come into focus. Thank you!
As always, great info and great presentation (and humor / humility).
I really appreciate your videos. Thank you for making them, you're very informative and your explanations are understandable and accessible. Thanks a lot.
That was an interesting insight into line boring on a lathe, thank you Quinn. My first ever observed line boring operation I saw was on a horizontal mill driven by overhead belts in a steam workshop way back in about 1968.
All the explanations you can get in these videos. You don't need anything more. Beautiful.
More T-Nuts! We demand a 24hr T-Nut stream!
Great to see it all coming together !
Really like your vibe, Quinn, and the confidence and cleanliness of your approach to each job! Keep up the good work.
Thanks for a new lesson. Glad to see you holding the bandsaw stop next to the metal you are cutting.
Really enjoyed this latest addition to your videos, shows the versatility of the lathe is limited only by the imagination. Thanks for sharing!
Excellent content. I'll be bing watching all of your other video's. Glad this channel came up for me. When your passionate about making things and machining the hard part is finding people who share your passion that you can talk too and are actually interested. The people in my life are not interested so I find myself bottling up my excitement mostly. It's the one reason I have considered making videos. It would be awesome to find people like you to share with and learn from. Thanking you for taking the time to do this. Have a great day and good luck with your projects.
Congratulations! Fantastic job. Look forward to you building the engine!
GREAT vid! Super-useful technique.
I’m just about to get a PM lathe, a tool I’ve literally been waiting all my life for. Your channel, tips, methods and projects are going to come in really handy! 😁
You are incredibly sharp! I learn so many things from your videos. Thank you.
Recent new subscriber and have to say, I've just found a gem of a channel. Super smart lady with a demeanour and way of presentation second to none. Top marks!. It's fantastic. Keep up the great work! Ireland sends many blessings!..☘☘☘
Thanks for sharing! Got something like that coming up in one of my projects. I was thinking of two holes, one to use a tool to set the cutting depths. Very useful!!!
Thanks Quinn, you did an outstanding job covering this on a small lathe. I've been deoing this work without the "lathe" professionally. (My largest job was about a 8" bore on a 20 yeard bucket for a mine. I could park my truck inside the bucket). There are "hundreds" of tricks one learns doing this type of work.
Hat's off to you! You're marvelously skilled and adept at the trade!
Always fun to see a new way to use a machine. I often drill hole to the diagonal dimension of the tool bit and not make it square. This is mainly for tool holders /boring bars on the 9 inch South Bend. The cutting loads are low. On the line bar the square hole may make the tool setting more repeatable. I have filed a few square holes too. Also milled a slot on the end of the boring bar and welded a block over it to close it. You can get round tool bits too.
Great videos, thanks for sharing.
I’m brushing up on my trade knowledge for a new job, and these vids have been really helpful.
Great video Quinn. I am building a gas engine and I needed to make a line bore tool for the cylinder and this video provided me with some reassurance that I could do this with the mini machines that I have to work with. 🙏.
Nice work on the set up. Myford vertical slides fit well on these machines for holding work on the carriage. I think you can get Chinese ones too. I used one before I got the mill but never thought of it for line boring so thanks for that little jolt. Looking forward to seeing the actual project.
Awesome! Love it, and really interested to try it out on my teeny little Sherline!
Fascinating technique very well explained and demonstrated.
Some time ago I line bored the bearings of a medium sized lathe on my small Emco Compact 8 lathe. Making the boring bar and setting up the machine was a lot of effort and took some time but the result was awesome and very precise.
Very timely! I have an upcoming project that needs line boring, so seeing how you got on with it has been very useful. Insightful comments too. I'm using a collet chuck to hold the headstock end. I was going to make the square hole right in the middle of the bar and grind the tool to put the cutting edge in the right place so I could cut in forward or reverse. Nice tip from John about threading the back side for micro-adjustment.
Thanks enjoyed your video and its given me some good ideas for my own projects . Just restored a large TOS lathe and it does have T slots on the cross slide . Deep boring has been one of the things i want to do so thanks again
I was literally just thinking about something very close to this the other day. Awesome work as always Quinn! ❤️
I hit google up with my questions and you provide so many of the answers in an extremely well presented fashion - luvin' it!
Great work!
Awesome Clickspring reference! Cheers mate!
Clearly this is an opportunity for a double-carriage lathe, so you can have one on each side of the steady rest.
This is great, as usual, and you do a good job of presenting it.
FWIW I cleaned up my boring bar carefully end-to-end as I also use it as the alignment jig for measuring tailstock offset.
I'm excited for this one, been wondering how this would work on a small lathe.
Awesome video as always. Thank you for putting it out.
th-cam.com/video/Oaew8dpjr6A/w-d-xo.html
Hello from the UK. A great video and very informative, just thought I'd mention that here in the UK these are known as "between centres boring bars" - I made a 1" one (yes I'm still using imperial measurements) which has a sliding 'micrometer' attachment, this is used to set the cutting bit as fine as 1 thou increments. - Quinn keep those wonderful videos coming !!
I’m really enjoying your videos and feel like I’m learning a lot. I’m also impressed that you were able to get Rachel Maddow to do your narrating.
Perfect. Great help and advice. Thank you
Love your work.
You do add the stuff that others think are common knowledge.
I also like I don’t have to listen to your life story before,during, and after.
Great to see application of traditional approaches. I think this might be the only time I've seen someone use a drive plate and dog on TH-cam. Turning between centres is such an elegant way to ensure precision and repeatability. Bravo!
Fantastic setup, looking forward to your next project requiring line boring cheers.
Thank you! This technique offers the highest quality solution I have yet seen to a problem I have. Also high effort, unfortunately. But at least I know that I won't fail if I do what you just did.
Quin keep making those great videos. as long as I keep learning something new or something I forgot I will keep on watching. pretty soon I will attempt own project..
Very interesting, why am I always impressed ?
Well done. You've probably seen Keith Fenner's line boring videos. Some are done on the lathe and some on the K&T horizontal mill with a universal vertical head.
One thing that helps with tool bit adjustment is to partially thread the back side of the tool bit hole. That way you can use another setscrew to advance the tool bit in a less fiddly manner. I'm guessing, though, that you didn't have the space in your boring bar for that luxury.
Wow, this was really cool to learn about. I wish I learned more about line boring in school
Thanks for sharing! Watch again!
This operation is really cool.
Wow! This is extra neat! ... I mean... Yay! It's Blondihacks time!
I normally set up the steady rest near the chuck, loosen the top arm and slide the rest to the other end and tighten the top arm again. This insures that the work is at the same height, end to end.
I wish I had seen this video about 3 years ago.
I line bored a cylinder for an antique hit and miss gas engine.
The bore is approximately 4.500" and about 12" long.
It took way more time to set it up in the lathe but it worked.
This is the first video of yours I have watched so thank you Quinn 😊
This isn't my trade, or hobby, however I can watch a lathe being worked for hours and marvel at what it can do. Thanks so much for your time in showing us your fascinating hobby Quinn!
Very timely video for me. I got a 5/16" square broach on Friday and will be making a bar on Monday. I'll be using it in my radial drill however with an outboard bearing for support. Ken
Happy New Year to you and your family.
Great job Quinn. You have the gift 😇🙏
That was really cool.... Great job !
Very nice. Thanks for posting
Impressive piece of turning
Awesome as always Quinn!
That, simply, was awesome. Thanks Quinn! I have a 14" lathe, but that lets me do 5-6 inch bores that are reasonably accurate, which is NOT something I could do with my little boring bar. And I like making tools :-)
For line boring I have found Cutting Edge Engineering Australia makes really nice videos. It's often possible to take measurement without removing the boring bar. See their video "Line boring and Bore welding Caterpillar 775 Truck rear strut rod " from 15:06 onwards. Might not work for this project though.
That only works if the hole for the cutter is on center. She put hers off center needlessly, because the hole should have been on center and the tool bit ground to get the cutting edge on center. Then she could have made a snap gage to measure the bore. She will deem this comment as annoying and pedantic lol.
Kurtis of course is working with much larger pieces making the measurements somewhat easier.
@@jerseyjoe2684 I think easiest would be drill another hole for measurement. Anyhow, nice to see these methods things are feasible even on small lathes.
@@DIYTAO Exactly what I was thinking. Drill two more centered holes in that boring bar, one before and one after the tool and make a snap guage like the one Curtis uses on Cutting Edge Engineering.
@@Cyruscosmo Of course making that special snap gauge would take time and effort, but so does repeatedly removing and re-centering entire boring bar for measurements. Also it sounds like interesting video project.
Great job Quinn!
I have done this on a project that needed to bore through multiple webs (similar to an engine block). You can measure your bores by turning a loose-fitting, stepped go-no-go gauge to slide on the boring bar. You slide the gauge up to the hole after each pass until the "go" diameter barely fits then move to the next hole. While a set screw behind the cutter can provide tool advance, a little trig and a slanted tool hole will allow a precise advance per flat on the screw. Using the lathe as a horizontal boring mill is a great technique. Your videos always deliver.
Great Video Quinn! Now you have me thinking of making a fixture plate to mount on my cross slide. A 10EE lathe.👍
That was very interesting to watch!
Really enjoyed this video, very informative and well done.........as is tradition.
Very nice demonstration Q. Now I’m intrigued to see your intentions for it.
20 ish years ago we needed a large air compressor for the live steam shop and by chance a previous employer was scrapping an old Kellogg American 340 series on a 120 gallon tank. The main issue was the high pressure side wrist pin had gotten loose and had gouged into the cylinder wall till the compressor locked up and broke the rod. Two main issues was the cylinder bore on the high pressure side was just under 3" diameter by almost 10" long and no automotive machine shop around had a boring machine that would do a sub 3" bore in excess of 9" long. So I built a similar setup but made a bearing bronze bushing that fit the taper of the headstock on my 16" american pacemaker and bored it out to 1.750", then built a 1.750 by about 36" long bar with a .375 tool thru it clamped and advanced with fine thread set screws. The carriage end of the bar was machined down to fit the slot on a tool holder and was aligned to travel into the headstock perfectly. Once ready I bolted the cylinder jug onto the face plate and at the slowest speed went about boring. The other main issue was a lack of parts available for an 40 or so year old Kellogg American air compressor and I doubt they ever offered oversized pistons. The size of the bore ended up being what I could get in a set of rings the next size over what I needed to clean the bore up and I had to make a piston to fit the bore and a rod to replace the broken one. Unfortunately all my pictures were on 3.5" floppies (old sony 91 camera at the time) and the floppies have all went bad.
I had no clue you could do this on a lathe!
I makes sense i just never tough of it. Nice video!
Can't wait to see what you are doing with that next!
You never disappoint! 🌠
Very well done! I remember my first time line boring! LUL It was a absolute mess! I must have broke 10 bits between many different issues! You did well Thanks for the Video!!!!
Very interesting and informative...as always.
Please stop reading my mind Quinn, got a project in my mind that needs a line boring operation to make it.
Didnt know it was a thing until recently.
Must say that you did get very good results on it and I am glad you showed how easy it is to make a line boring bar, I was thinking of using a piece of round HSS with a flat part ground for indexing on it for ease of making the bar.
It's a testament to my ignorance that I really don't understand what's so special about line boring or why it's fundamentally different to using a boring bar. But, you achieved it with style, so thumbs up. If I ever get to the stage where I can actually hit my target diameter on the lathe, I might give it a try...
Nicely done. Thumbs up.
Ah, you’ve referenced Chris Budiselic there, as is tradition... 😎
What a great video for Canada and therefore, of course, the world... 🇨🇦
Great video think I have learnt everything from your videos to buy my first lathe.
I line bore in a mobile capacity and am in no way a machinist (yet). I didn’t even know you could do this on a lathe. Love these videos!
You can buy bushings with a square hole broached into them from MSC. I learned this from a Keith Fenner video. Thanks for the interesting videos.
Amazed, as always.
Neat!
Thanks, and Meow to Sprocket.
Nice, been looking for info on this technique. Building small engine, need bore for crank and cam journals.
THANKS for the video!
Must be lathe line boring month. Two channels both doing a line boring on the lathe video. Very neat way to extend the reach of a small lathe.
It makes me really happy to see women in this trade. And it seems like more and more women are coming to machining.
Hi Quin, the old school, on a job like this, would have recessed the centres so that they are less prone to being damaged! The recess would be a mm deep and a bit larger than the OD of the centre hole! I always do this on a job that needs to retain accuracy.
Thanks for the vid.
Very nicely done 👍👍👍
That clickspring shout-out. 🤣
It's just the perfect shared open secret, isn't it?
If I didn’t, 50 people would have commented “just make your own broach like Clickspring did!“, as though I don’t have too many projects already. 😁
@@Blondihacks I don't think the internet is ready for a second Clickspring. 😁
I’m not sure which is tradition, face turning or BlindieHacks saying “as is tradition” when you do face turning. Either way I like it. Always makes me chuckle. I so easily make the error you started to at the beginning that I didn’t even see it until you pointed it out.
Thank you for this excellent TH-cam and for sharing your knowledge and experience. I always learn a lot from your TH-cam.
Nice, thanks. I watched another video a while ago by The Shed Dweller where he put together a line boring setup to correct a factory misalignment in his tailstock quill. It was quite a tense setup since a serious mistake would have ruined his tailstock.