Small Milling Machine Improvements - PM-728VT

WHAT AN OPENING LINE OMG😂

Gaffer tape.
✌️

🤗❤️, You solved my stainless heat problem. Car-buyed or truck-byed.,jpk ml
A-buyed with me....hubby shop over?

Just watched the video very good work but I see you using a pump air blower what is it ?

Excellent problem solving!

I have been watching for a while but I would like your opinion on the harbor freight mini mill. It has an R8 mandrel and it’s good or bad

Cheeseburger huh?

I'm a new hobby machinist and I have learned tons from you! thank you for making these videos!

I really love your videos. They have the right balance of everything; and mostly knowledge content and pleasure as if viewer would actively participate at building the things you do.
I wanted to say also what @nt2080 already said; poor man's carbide masonry bits sharpened with small diamond Proxxon disk/hand tool. Proxxon mill-drill jig has good repeatability for angles and travels. Though I made limited use of them (carbide drills), they did the job when it was necessary in tough materials. Even (though I don't recommend pushing luck against purposed tools) sharpened carbide tips of a large masonry crown and used it in multi- fly-cutter style. For aluminum stock, off course.

Great job thanks for sharing information.

Sounds like you might need some Carbide Titanium bits.

This thing hasn't even chamfers... You animal!

are we all just gonna leave that intro lie? lol

@blondihacks I enjoy the channel. Always a smile on the horseshoe jokes, but I don't get why you reference it ... if you can pull back the curtain (since I missed some origin story), is it because you're just so "lucky" in that things tend to come out great (obviously skill and perservance!) ???

Cubits. Nice. That had me laughing for several microfortnights.

I finally got around to installing the upgrade for making the little DRO more accurate on my 728 today. I have the replacement DRO like you used here but haven't gotten around to installing it yet. It's nice not seeing the reading change 2 to 4 thou by the end of the cut.

Your shop is just to clean...

By far… best instructor for small machine shop enthusiasts.. and no shame on Chinese equipment.
Thanks for the videos

You know Blondie I thought your Dro already covered the z-axis movement but then I thought to myself there's a possibility that you Dro covers all three axes except for the quill and that's probably the reason why you installed a new dro for the quill it self and if that's the case please let me know if I'm right or wrong with my assessment I want to make sure it's accurate I know my machines don't have dros at least not yet but one day I will

if the center drill worked then speed could be your issue. as it was smaller dia. With stainless is best to go very slow when drilling.

Chère compatriote! Depuis longtemps je vous suis sur Yoube et j'admire votre perfectionnisme et la qualité de vos mouvements ainsi que votre obsession 😀 pour la propreté. Mais il me semble qu'il serait encore plus intéressant pour vous de vous procurer une vraie fraiseuse. Considérant que vous maintenant plus d'espace qu'a vos début, il me semble qu'une fraiseuse de type Bridgeport vous irait comme un gant. Elles ne sont dispendieuses et disponibles. Ce genre de fraiseuse porterait vos qualités à un summum de précision. Encore une fois merci de vos démonstrations. Bon succès.

Cattywumpus = on the piss, for your Australian audience, you're welcome!

OMG!!! I replay the opening over and over... HILARIOUS!!!!

good day.
Just got a Krones 400 combo lathe mill.
is in really good condition.
have noticed a few isues that are easaly upgraded.
but the cross bed dosent have enough travel.
is less than 12inches.
did you make a vid on making it longer and travel farther?

Having problems with 316 stainless, try slowing the drill speed way down and use lots of oil. Using that trick and never wipe out a drill or work harden the stainless.

This video is exactly what I needed to see. I will start the quill mod on my 728VT today. Thanks for posting!!!

Fantastic improvements to an already fantastic machine, I never noticed the mount bracket movement in my quill pro I must check it and do your upgrade if it is required, thanks for the wealth of wisdom cheers.

I learned something from this video. If all the holes are in the wrong place, the errors cancel out. I'm going DRO shopping!

for those wondering about that old timey measurement for leather... 4oz for example, that means a sq ft of that leather weighs 4ozs.
thge reson for this method is that different tanning methods provide different material properties and thicknesses and the best method for determining strength is density of the hide, more so than the thickness.

👍

Ive never seen u this happy

can I borrow that horseshoe? US lottery is up to 650 million.... taking the lumpsum and after taxes its 205 million in your bank account... totally worth having a horseshoe up your ass. And I, too, eat many cheeseburgers!

If replacing the battery gets irritating it should be a simple project to hard wire it to the mills mains power. If interested just respond to this and I will find you the parts to order and work up a wiring diagram.

You are a fantastic teacher!

Now I can’t un-think or un-visualize that horseshoe.Thank you and the internet.

How happy are you with the Homge vise? I have a rotary table from them but it will be some time until I can set up my shop, so I couldn't try it yet. It looks pretty good, but what is your experience with the quality?

Nice 👍🏻.

How do you check that the quill DRO is actually accurate to a thousandth? It seems like the fortuitous mounting alignment with no spacers could be hiding an offset angle that would throw a cosine error of a few thousands.

Wow... Nice work! Never stop refining those processes that add quality to the final piece. That's what separates the artisans from the weekend warriors. Love your work Quin.

LOL stumbled across your channel while searching for gaffer taped horseshoe cheese burgers. Sorry shut up, I have a question, what do brain farts smell like?

I don't use anything but carbide endmill's for the most part since the steels I work with are fairly hard even before I heat treat. In a pinch, even a properly sharpened Masonry carbide drill bit will cut most hardened steels. Just not for long. ;<)
they are inexpensive so I keep an assortment here in the shop.
KnifeMaker/Retired after 47 years in the shop.

Love your work 👍

Nice job I like.😊

Quinn!

For a project, if it's not too complex, I'd love to see a set of ball end L shaped hex keys.

Thankyou 👍 wimet carbide tipped drills are very good

I've avoided work hardening SS & other normally troublesome metals by throwing out the 'speeds & feeds bible'. I use cobalt drills & run at ~115 rpms.

You can get right after it w/ feed pressure, but don't be as aggressive as you approach break through; it's real easy to snap bits at low speeds w/ too much pressure.

Works for holes up to 0.700" or so.

Also, I don't try to drill the entire hole w/ 1 bit. Take it in steps, but keep it at 0.30-0.35". If you get too cautious w/ the size increase, you can get a work harden problem at the margin of the bit's cutting edge.

Also, I seem to have more reliable success w/ a gel cutting lube, than a liquid.

When it comes time for carbide bits, I use either a solid carbide spade bit or a carbide edge & tip 2 flute bit rather than a conventional twist bit. The choice between spade vs 2 flute is based on depth of hole; spade bits have limits based on percentage of diameter.

The spades are phenominal for center drilling broken studs & bolts, even if used only to get a good hole started.

Neither spades nor 2 flutes do well outside of a drill press or mill, though they've done OK w/ a Porta-Align & hand drill. (The brittle carbide demands radial control of the bit or it's snaps in a heartbeat.)

Hope that helps someone.

GeoD

The quill DRO on my Grizzly G0704 does NOT auto shutoff. Ask me how I know... (I've burned through a lot of batteries) It's part P0704234, and unfortunately they think it's worth $125.

Mitutoyo quill DRO does not auto shutoff...must push on/off button or it will stay on till the bat dies