MIni Lathe Upgrade | Compound Slide Scraping
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- เผยแพร่เมื่อ 25 ส.ค. 2024
- In this video,I use scraping to repair the Mini Lathe Compound Slide and Improve accuracy.No milling machine needed.
The tools I use：
1 Surface Plate
2 Hand scraper
3 Prussian Blue oil
4 Dial indicator
5 Micrometer
6 Rubber roller
7 Whetstone
![[TH] 2024 PMSL SEA W2D5 | Fall | พลาดวันนี้ จะต้องเสียใจ](http://i.ytimg.com/vi/A5-Cuo12p6A/mqdefault.jpg)
One little tip for things like this.
Working on the part is a lot easier if you can keep it from moving, but constantly repositioning it in a vice is a pain in the backside. For a part this size, If you get a 300mm square piece of 12 to 18mm plywood, Then screw a 30 to 40mm square baton of wood along the bottom of one side, and get two lengths of wood that are thinner than the work piece and screw them in a 90' "V" on the other side and end of the plywood, you can hook the it over the edge of your workbench and put the work piece in the V. This way you can use both hands to have more control over the scraper.
That is some major dedication to the craft.
There's a select group of home machinists who appreciate this type of workmanship.
Hope to see more videos on modifying and improving the mini lathe.
Cheers brother
What cri8tor said, X3.
beautifully shot!
Beautiful to watch you doing that. I must learn more about scraping parts. I once watched a guy dismantle a huge machine and hand scraping all the parts, before reassembling it, back together again. I also saw a Japanese guy hand scraping high pressure steam joins, so they wouldn't leak. All in fine detail.
A time honored skill. Almost like water torture. The mind constantly wants to wander. Well done.
Today finally I dedicate it to do it.
Finishing really good. I can part a 3/4 steel rod with no chattering! And move the compound smooth like silk! Thanks for sharing with us.
Have you ever seen any Richard King videos? Your on the right track but the idea of scraping is also to provide lubrication areas incorporated into the actual scraped surface. Very enjoyable video. Thankyou
I liked seeing the scraping process. Good music choices, too.
An absolute pleasure to watch 👍😎 and it's rare for me to keep up the volume. If I smoked, I'd probably have one right now 😁
much easier and quicker to lap these very small surfaces.
You definitely have a ton more patience than me, nice job
Beautifully done. But, we want about a 70% blued surface, leaving pockets of low areas to hold oil. There’s something that’s too good. It will wear to quickly if it touches completely.
Not sure how that matters if the dovetails aren't parallel to each other and to the bottom surface. You'll know if you get consistent feel when moving the top slide back and forth.
after scraping one could probably lap the dovetails in, but you make a very good point
It matter a lot. I used to have mini lathe and weak dovetail parallerism was the biggest problem in it. It was impossible to tighten compound in a way it didn't bind when being moved or have visible sideways movement when rotating feed.
Grease is almost never used around machine tools such as that feed screw. Why? Because it retains the wear particles and continuously runs them back through the the parts and vastly accelerating further wear. If the feed nut had a grease zerk fitting then yes it could then be greased every so often to help flush out and clean them. Since it wasn't designed to use that then oil is used to both lubricate and an excess amount of that oil is helpful to wash out those particles. Oiling and doing so often is the cheapest method of slowing that wear. What most of the machine tool manufacturers fail to mention is it's normal maintenance to disassemble parts like this then use something like a spray carb cleaner or CRC contact cleaner to clean and de-grease the feed screws and just as important the feed nuts then relubricate once there clean. Those clean well lubricated parts will easily last 10 or more times longer than those that get ignored with little lubrication or when the wrong lubrication like that grease is used. Grease also requires a much higher clearance on the bearing surfaces than parts designed to use oil as the lubrication.
@Turning Point finally a real machinist
Was thinking exactly the the same . He also could have scraped the side of the gib that touches the business face of the topslide dovetail. I watch a lot of these videos for sheer entertainment value. They elicit a sophisticated eye roll in me most of the time, much like The Repair Shop on BBC1. Some of the best ones are when folk start lapping their saddle and tailstock to the bed. A number that have done this claim to be qualified engineers.
You did a nice job, the engineers blue was far too thick for my liking. Each to their own. Thank you for sharing.
Nice, requires a lot of patients. thanks for sharing!!!!
Old school, only people who know their craft can do that, I've done half my life like this.
Nice very nice work.... beautiful 'scraping'.... great art.
Great work!! Thank you for sharing.
Cheers
Jimmy
so cool! it's so satisfying to see that hand scraping
Beautiful job, you have done
Très bon tutoriel
You did a wonderful, beautiful job. I can’t even begin to tell you. I’m really going to try to get surface plate. Height gauge scraper whatever you did I’m gonna do. Love your video, so helpful and understandable across all levels. How would you begin with the Bedways?
The way you checked it originally your assuming the bottom is parallel to the top, it's likely not sense this is made in china lol but parallelism really wouldn't mean anything. I bet the bottom was much flatter then you realized before you started.
My best Vedic in mini lathe. It inspired me to take this my next upgrade. However the ink is no where to be found at hobby price. Any advice? Please
Thank you
thanks mr..
Excellent work
Great project, thankyou
Amazing
great example of how tune it up where the factory went cheap.
What about buffing parts to super-smoothness during re-inkings for flatness?
I would get frustrated holding the part that I am scraping. I could critique a lot of what you did but at least gave it a shot and I'm sure it must have helped in some way. Good Luck!
great job!
Thumbs up exactly.
Esquire your work bears a philosophical connotation. The entire human development could only be determined by the level of “Scraping off “ big and small errors in all facets of life, not at all limited only to metal surfaces.
Very interesting and informative.
You didn't scrape the dovetails. Also you should produce chips rather than dust when scraping. Other than that, good job :)
I don’t think he needs to go that deep to produce chips.
I think it still work its all about material removal not getting thongs done in expected time
Great quality
What are you using to scrape? Amazing results!
Excellent!
That was quite impressive. I've enjoyed you machining/mini-lathe oriented videos. Keep them coming! Subscribed.
Wow. This was awesome. Thank you
Great tutorial!
Finish the job and scrape the dovetail, positive side and the gib. :)
I have a small carbide insert holder for doing that, but smaller areas aren't always easier to do :)
@@Grauenwolf Sorry but no, brass while it would work certainly isn't the best material. Most if not all industrial machine tools chose cast iron for there gib material for very good reasons since it's a good bearing material and is quite durable when cast iron slides on itself.
@@Grauenwolf Yes I do know brass is a well known bearing material for the right location and where it can be kept clean enough. It's also soft enough to be susceptible to picking up and embedding material harder than itself so it then starts lapping and scoring the surfaces. I didn't say the original gibs were cast iron, and they very likely are bananna shaped pieces of steel that are anything but flat.
Cast iron gibs are chosen as I said by the major machine tool manufacturers because of it's known durability and wear quality's over anything else available including brass. To go to all the work of scraping in the slides on this lathe and then choose a material known to increase wear and scoring is rather pointless. The only thing brass has in it's favor is it's probably easier to find for most of us than cast iron in roughly the right shape might be. Either material would still have to be scraped flat, so the amount of work involved is the same no matter what get's used. Cast iron is just the better choice.
....are you sure the other side of the piece is planar?
Nice job! :)
Perfect!
Nice
Very exacting...would rubbing on a sanding block work?
Beautifull work
Very inspiring video! Are you going to do the cross slide also?
This work was perfect!!!
Ajuste fino muito joia!!!
Why in the second part did you use the micrometer instead of the dial indicator to check the bottom piece?
难得看到国人在这发视频，赞一个。这个小拖板前后会窜动，我想在刻度盘那个地方掏个孔然后装端面轴承，你这个好像在转盘那边装了个定位螺钉，感觉这不能解决问题呀？
добрый день .
интерестное видео..
так и хочется сказать..Магнитный стол вам нужен.
Молодец супер!
Didn't scrape the gib?
ممتاز جدا جدا انتا عالم ولك كل محبه وتقدير لفديوهاتك الجميله اللتى تبهج العقلExcellent very Lanta world and you all love and appreciation for Vdyohatk beautiful mind is received and brightening
Muito bom
Nice!
That's something I need to leurn
This music is similar to medetarinan or the balcaninan. where r u from?
You could use sandpaper
凄ですね。
I may be wrong here but seems all you gid was scrape your compound paralell to a non critical surface? from hhose readings the only material that needed to come off was the 0.03mm difference between the two initial readings
Hi. Nice work. Where did you buy your scraper?
that good work!!!!👍
Mitutoyo, Miyohugo, Miguhoyo, Michochuyo... don't need to scratch. Nice work
Does anyone else think he's using too much engineers blue on some of these tests? When propperly scraped in, engineers blue should show lots of small and roughly evenly distributed dots of contact, Not one big splodge. If you slather enough blue on you could even get a solid transfer on surfaces that are a couple of degrees out of alignment !!!
Yeah. I wasn't going to say anything because I mentioned this on someone else's video a few years back and a mass of the channels "Fan boys" told me that I didn't know what I was talking about. In that video the bloke was using so much blue on his surface plate that he could have shown that a used brick was scraped to perfection (The part was literally scraping beads of blue up around the edges of the part as he moved in on the plate !!!) . The scraping in this video wasn't TOO bad. Some tests were a fare bit too heavy on the blue, But the tests that were OK showed that he wasn't doing that bad of a scraping job.
I don't get why you didn't use your mill then scrap?
May I ask what kind of Whestone you using? What grit is it? Thanks for sharing.
This is an honest question, it looked like at the end of each surface you scraped there was no individual points of contact instead there was a single contact point over the majority of it now the question is that on purpose because the compound doesn’t need to slide very often and full contact is better or for another porpoise? Please tell me because I am about to start on mine and I am trying to get as much information as possible before I start
100 % contact would be ideal; impossible to achieve though. Something like 25% is already a good start
great...something else for me to have to do now..lmao
lathe scraper link:????
这一期有浓浓的羊肉串味儿！
That’s what I’m talking about
I followed this to the letter and even made the hand scraper used by watching your other video. Can this be done to the cross slide of a mini lathe as well?
Thanks. Great job! Where to buy the scraping tool and spotting Ink?
Grimding a steel to negative rake but not too much i find it blunting quickly if neg rake is too steep just a few degrees of neg rake and a radius if can buy tungsten carbide insert or stock and make a holder or braze it and a handle make sure to not buy very thick stock of carbode they are bery hard material to cut and i had to go to a machone shop to get it split into thinner pieces grinding would require diamond wheel make sure the cutting edge should be able to cut easily and creates powder whem scraping your nail as a simple way to test and make sure cutting edge leave not line like marks or buy yourself readily available carbide scraper remember it needs to have a radius and negative rake.
nicely done mate.
by the why, why you sensors that Miluloyo dial test indicator. :))
Which song is this? Sounds too much like Turkish music
Looks decent but you are using far too much blue, you should be applying a very thin later so it does not smear. Otherwise you get a false reading and not a true representation of the high spots
I was going to write a something about this, But decided to first check that the comments section wasn't already full of people pointing it out...... Surprisingly few have mentioned it.
I was trained as an engineer many years ago, But I still remember my instructor stating that "If you slathered on enough transfer blue you're going to fool yourself into thinking that something with a surface like a bloody millenicut file had been scraped to perfection". :)
In the final stages of scraping, the transferred blue should be a very faint misty tint on the high spots. What I was seeing here looked almost like someone had been colouring bits in with a sharpie !!!
Please give name/type of exact tools used.
The scraper etc..
I want to do same thing.
Thx
Make Everything ok but most important.
How you made hand scraper?
What material? HSS?
@@jw200 Scrapers usually are made of Carbide, well the part that does the actually scraping is anyways. Usually the tool is tool steel or some other softer steel i think, and use a carbide insert at the tip.
Interesting music, sounds chinese but somewhow different
There is just no way that I would spend that much time to "improve" a new lathe that should have been good from the first instance.
Having to rectify all and anything possible that can be rectified tells me the user is purely doing so because he has nothing better to do with his time...........buying a better quality lathe would have been the best choice as you then have the time to actually make things you bought the lathe for in the first place and a better quality lathe would also give you better results than trying to fight against inadequate machinery design.......making a gold plated silk purse out of an old Sow's ear never gets you near a lathe of quality no matter how hard you wish.
The point of having “nothing better to do” is exactly what working in a hobby shop is about, it’s just about having fun and learning new things for a nice and low price tag. It’s about the challenge the skills that come along the way.
A lathe that costs as little as these do isn't going to have surface ground and hand scraped ways. Everything about these mini lathes is a compromise on quality to meet a price point. It is what it is.
A half decent high precision benchtop lathe in this size would start at about $7000. A high end one is much more.
Even a brand new lethe ,with hand scraping ,becomes better for high tolerances. You got to admit it was nice to watch.😅
to zero the material, just pu a grinder paper on to "near absolute" granite and sand...
Did you know the machine named that grinding machine?
way too much ink (you need to spread the ink thinner)! you don't see how many points of contacts you have.. just because it's blue on all of the surface doesn't mean the job is done.. it only begins :D also you didn't scrape the inner dovetail ways
arabic music??
Это не правильно! И к шабрению имеет малое отношение. Пазы ласточкин хвост не шабрил вообще. Система замеров странная... ИМХО.
Too much blue, too thick
That chinese steel isn't worth the effort. Complete waste of time. The lathe is inherently poor quality.
if you spent that time making something to sell you could save up and buy a real lathe
fuck off @Summit X 30+ years in the game fucking fool
I read this comment and the other two associated with this primary comment. I am not a machist, but what I took home from this video, is how to do something to assist in the performance of a lathe, lets just take this video as just that, not a pissing competition on which lathe is better. I enjoyed the video, I don’t own a lathe, but if or when I do, I will take all the videos I have watched and be willing to do something similar, maybe not to the same quality. That is not the point, this is a hobby, not something that pays the bills.
Nice