7x16 Mini Lathe - inverted carbide circular saw for parting blades (reverse direction)

7x16 Mini Lathe - inverted carbide circular saw for parting blades (reverse direction) - part 2

Рет қаралды 28,274

9 жыл бұрын

Hi everyone, part 1 is here • 7x16 Mini Lathe - Usin...
In this video I have another blade cut from a carbide tip circular saw blade, this one I tig weld to a 3/8 square bar with .035 ER70S-2 filler wire. This blade then can fit in a regular A2Z quick change tool post holder. Also it is easier to cut it and not worry about being accurate if you are going to weld it to square bar. Because you have to cut it pretty straight and parallel if you are going to get it to sit in a parting blade holder perfectly. As you can see in the last video the blade only lasted 3 cuts and broke.
The mistake I made this time was I welded the square bar to the wrong side! But this turned out to be a great experiment as got to try what youtube user Latheman666 did and that was run the 7x16 micromark mini lathe machine in reverse. The first cuts are the ones in the video and wow it really worked great. There was little chatter that was easy to fix by moving the blade up or down, but notice at no time did the blade build up material and get jammed like my other videos.
The problem with welding the saw parting blade to square bar is you cannot extend and shorten the blade stick out as there is a fixed distance between the carbide tip and the welded square bar. But you could just weld a couple of blades with different lengths I suppose.
The material cut in this video is steel 4130 and aluminum 6061 round.
thanks for watching!

Пікірлер: 35

@randlemcmurphy5493 7 жыл бұрын

Cool idea. Lot better than waiting a week for parts in mail.

@AtimatikArmy 8 жыл бұрын

Wonder why the negatives, this is a great video for budget DIY garage lathers like myself! Cool idea, I like it and it works pretty damn good considering!

@robertschulke1596 8 жыл бұрын

Cutting in reverse will tend to lift the carriage so the only thing restraining it is the gibs. Cutting normally, the base of the carriage is on the bed of the lathe, and the gibs only have to hold the alignment.

@JeffreySupit 7 жыл бұрын

The worst chuck/spindle runout I've seen on KZfaq. I have a runout 3 jaw chuck too but this chuck makes my chuck looks perfect :D

@jeffiscool1805 8 жыл бұрын

Welding is a nice easy quick idea. I don't think people understand how much we have to pay for tooling and machines and how few choices we have in Canada. Good work.

@rustypanels1917 3 жыл бұрын

Quicker with a hacksaw.

@Cabmaker 8 жыл бұрын

Seems to work great ! good idea

@jamiebuckley1769 8 жыл бұрын

i see you have some runout on your chuck. try rotating the jaws in different combinations until you have the least amout of runout. is it possible when you took out the jaws you didnt put them back in the right spots? just a thought.

@randomlathe 8 жыл бұрын

+Jamie Buckley Hi thanks I have moved them around but this is actually as good as it gets, this is the 2nd chuck, the 1st one the jaws were ground so bad they only touched at the ends. Unfortunately yesterday the lathe stopped working , waiting to hear back from tech support.

@olhemi1 5 жыл бұрын

😎👍 nice job

@BGraves 8 жыл бұрын

with that wobbly shit you're gonna rip the t slot off your cross slide when it snags

@randomlathe 8 жыл бұрын

people say a lot of stuff on youtube but no one mentions for these lathes the cheap ass control board will burn up way before you get a chance to rip ,break,crack or even lose your fingers

@BGraves 8 жыл бұрын

I'm suggesting that the wobbliness isn't conducive to parting. But I guess with an o-ring for a drive belt you'll have a hard time ripping the t slot off the cross slide. Didn't say anything about safety.

@woodhog4154 8 жыл бұрын

Thank you sir! Now I have found a way to save money on parting tools and not lose an old carbide blade as well. Wonder how many tools you can cut from one blade. Also they should not have to be as long as the one you cut.

@randomlathe 8 жыл бұрын

Gun Nut thanks for watching :) you are right it doesnt have to be that long especially if you just welding it to the square bar stock. I cut 2 from the blade that long for the previous video kzfaq.info/get/bejne/es-BgdqLzszUmmg.html where I slid it in the parting blade holder. Now that I think of it I probably could cut all the blade tips off in maybe 1" lengths , cut a bunch of square bar stock and spend 15 min tack welding them together and I have a bunch of parting blades. But when you do it this way you are limited to how deep you can part because the square bar stock, so you can just cut a couple of longer ones for deeper cuts.

@metal2 8 жыл бұрын

try that on 304 ss I use my cutoff to on that normal and I have a 7 x 14 runs great also use cutting oil not wd40 lol on that run out you shure it isn't the spindle ? if 2 chuck does that ?

@TheTruth-fs2rm 4 жыл бұрын

It's AL WD40 is fine for that. Tap Magic for AL is really good stuff.

@franciskenny2115 6 жыл бұрын

It would be a lot better if the chuck ran true,?.

@NotSoDumb 7 жыл бұрын

Parting tools are so cheap and they last a long time. I guess it would be fun to use saw blades for shits and giggles. I'd be concerned about running a spindle that's way off center, asking for trouble there.

@randomlathe 7 жыл бұрын

The runout is from the 5" chuck this was chuck number 2, the first chuck wouldn't even hold anything. If I put the small chuck like on yours you won't see any of that. Maybe in the USA a parting blade is cheap but a $7 hss 1/2" parting blade shipped to Canada costs $30. If I bought this lathe in 2016 shipped to Canada is around $1200 with no tooling.

@NotSoDumb 7 жыл бұрын

Wow. They don't have tooling in Canada? Maybe you could hook up with someone in the US that could pick them up for you then send them to you. I guess you just gotta do what you gotta do.

@derekcollins9206 7 жыл бұрын

NotSoDumb Really?

@NotSoDumb 7 жыл бұрын

Actualy, parting in the opposite direction can be better. Lots of people prefer it.

@ddistrbd1 6 жыл бұрын

Parting with blade inverted is often used by those who own mini , micro lathes but often not advertised because it is (or it seems to be) against common practice and somewhat unorthodox, there's a company that is actually making and selling this inverted parting tool : www.eccentricengineering.com.au/index.php?option=com_content&view=article&id=31&Itemid=45 The misunderstanding of this concept is nothing new or unusual.I commend you to be one of the few who thinks out of the box .

@BourneAccident 8 жыл бұрын

Stephen Hawking?

@moderatemixed8410 8 жыл бұрын

When the chuck comes off, you're going to hurt yourself.

@randomlathe 8 жыл бұрын

+Moderatemixed ! why and how would the chuck come off? It is bolted on with 3 screws to a backing plate. WHY would there even be a REVERSE direction for the lathe if the chuck would come off? Please explain to all of us Thank you.

@ramwall1500 5 жыл бұрын

I'm sorry but this is the worst video I watched, unless you were trying to show what not to do

@moderatemixed8410 8 жыл бұрын

Your backing plate would be screwed on, so if you turn it in the reverse direction it can come off; and does. Just weld one correctly. It's a good idea, But ask yourself, "why is it that NOBODY ELSE" turns in reverse. Unless you have modified it with a pin and not advised your viewing public, at which point you should advise the viewing public. Unfortunately ignorance is not an excuse; not in a world where people can be hurt. IMHO

@randomlathe 7 жыл бұрын

The backing plate is not threaded on it is it bolted on and the spindle is 1 piece so not even sure you know what you are talking about it. Why would anyone thumb you up for that shows how much people know lol.

@TheJonny2200 4 жыл бұрын

randomlathe bro 4 years later still has one thumbs up. I’ll tell you who liked it. He himself liked his own comment