Inspecting some HBM ER25 Collets and trying out some bue nano inserts 

"Oh! That's horrible. That's a disappointing result...................Hey! Let's try again. It's not like I''m fucking up something expensive here" Love it!!

10 000 subscribers !!! Congratulations, my friend :) Love your videos :)

A good place to start would be fix the spindle bore then worry about the collet chuck.

It's interesting that you have a better finish up the front, maybe try giving the tip more relief below the tip? Swarf may be getting trapped and marring the finish and the smaller the diameter the less clearance you have on the boring bar below the cutting edge. Also although it may increase chatter, could try cutting upside down on the opposite side of the bore? Love your videos!

I have those collets in 32mm and they are very good. The small collets have a reduced slit by design. You really have to grind the internal holder bore with a tool post grinder.

Love your honesty as always.

Not a machinist, but couldn't you clamp the outside of the collet chuck in a four jaw chuck. Then you could adjust the outer dimension for zero run-out. Then cut the internal bore and get a chuck with zero run-out.

It's the low cutting speed what causes the problem. At 600 rpm ø25 has a surface speed of about 47 m/min. And then decreasing as the diameter gets smaller. You should probably have a surface speed of above 200 m/min on those inserts. Which means 2500 rpm at ø25.

The consumer in you got the upper hand? Hang on...there's a consumer in YOU? Nah! Your machinery is even older than mine! You're a hardcore recycler!

You can get collets and a collet chuck with zero run out but your going to pay a lot more ! What kind of work are you doing ? the cheap stuff from ebay and amazon works just fine for home hobby stuff. What is it your doing that you need such perfection ???

Gday, the blue nano inserts I’ve had great success, I found the there really good on harder materials, I think they are bloody great, I use a battery drill to drive my compound slide to keep the same speed and find this helped a lot, the collets look a hell of a lot better then the banggood experiment. Thanks for sharing mate, Matty🇦🇺

So close to 10k subs!!!! Congrats!

hmmm I see old vantage lathe with brass bushings high run out in spindle and not checking the taper with machinist blue on the collet.

Ah shit, and I ordered an ER32 collet chuck with MT3 taper just like yours and 4 collets to start me off and now I see this vid lol just my fucking luck!

Hi RM thanks for sharing another great video. I see you drew some blood on this one. 🙁 An idea, maybe you could turn a cone to the 8 degrees and then use some grinding compound to get a better finish.🤔 and I think you might be right about the blue nano inserts.

the blue nano inserts I get from aliexpress are very high quality, they turn very hard steel like butter and produce nice finish, other inserts I have do not turn hard steel as well

I think grinding is the only way to get that mirror finish you look for. You only need to get the angle right. But I’m sure that will be an whole other video Keep it going!

There is a relationship between the collet nut and the taper of the front of the collet . Depending how tight the thread is the nut will float on the collet or it will deflect the collet to one side depending on how close the overall tolerances are. Try to tap the high side of the collet nut to improve your run out or look into chasing the threads to ease the nuts position. You must have a precision carbide cutter to be sure you are measuring the arbor run out and not the rod you have placed in it.

Why not grind the taper? Shouldn't be much that has to come off. Did you test if rotating the parts gives different runout?

Sorry that didn't go better. You might have been better off with a HSS cutter. Hoping you find a better ER25 collet chuck.

Carbide tends to leave a better finish at a higher speed deeper cut and slower feed

rM, I’m gonna stand by my previous comments on the Blue Nano inserts. You cannot expect good finish results with any carbide tool at such a low speed. I know your lathe is limited to 600rpm but that’s just not fast enough for carbide cutting. Also a hand fed cross slide always gives irregular finishes results. Even using a drill with an adapter will improve most finishes. It gives a steady, consistent feed. Something turning by hand cannot accomplish. I recently ungraded my collet set with a 25 piece set. They are marketed by an American company but were probably China made to their specs. I had an 8 piece Banggood set prior to this. The difference between the two sets are quite remarkable. The Banggood set was very inferior. Their quality control leaves a lot to be desired, to say the least. I here you on those aggravating shrink packaging covers on each collet. They are a fright to remove. I guess that’s better the Banggood practice of throwing everything together into a cheap zip lock bag. Thanks for the review and Happy Birthday!

What are your motor specs buddy? I would like to help you out with a VFD.

I'll have to go check the run out of the ancient 4S collets I have for the Stark lathe. From what I've seen of your ER32 and ER25 adventures I may be better off keeping the old stuff.

ik wacht nog steeds op die afgekeurde collets van banggood die jij zo vreselijk vond

Am I to assume you don't care for the Bangood ER32 collets ?

That looks like a good buy. Have you bought some bronze for your 10K subscriber celebration which is coming soon?

Happy three and counting Birthday : )

Yes, HBM is branded chinesium.

A word of warning about your silver steel. It tends to be slightly oval, it is not precision ground as we think it is. Yes it is ground, but not precision ground.

Good review video. :) You should maybe try and grind up a HSS boring bar. Run it slow and use plenty of oil. I think you are loosing your finish down the back of hole when the chips start piling up. I saw “This Old Tony” the other day with a battery drill driving his compound slide to get the feed nice and even. Not sure you could get the drill to go slow enough for the HSS boring bar. I also saw an old tool post grinder on eBay the other day. It went for more than the cost of my lathe :( Anyway enjoyed watching.

Why no handcuffs on the box!!!

Another great video Rillingm....Rolinme.....Rolingrawhide....never mind.

if you have runout on chuck and you cut out that bore and after that turn the collet chuck 180degrees its going to be 4thou out after that ;)

I too have the ER collets from HBM, and they are miles better than any other import collets. My set does have a maximum runout of 1/100, most collets do better. The main culprit in a ER setup is usually the nut. I replaced all my collet nuts with the ones that have the ball bearing in them (those can be found at arc euro trade in the UK) This makes a difference which is hard to believe. I suggest you get a colletchuck from HBM and a nut from arceurotrade (the one with the ball bearing) and you may just get yourself a setup that is indeed 1/100 mm 'pure' or better. That banggood stuff isn't worth throwing in the bin, let along using it! At the low speeds on your 'old lathe' you shouldn't be using carbide insert tooling. These inserts are designed for heavy cuts at high speeds. They usually do pretty lousy on low speeds. HSS will do a lot better. If you really want to clean up that collet chuck, I suggest you lap it. That will get you a lot closer ..... Oh and WD40 is a good cutting fluid for aluminium.... it's pretty crummy for steel Paddy

You can’t measure a runout of 0,01 mm with a dial indicator with a 0,01 mm scale division !

Good ER collet ! 🤗

G’day RM, try again when you have a good tool post grinder. Good try anyhow. Cheers Peter

HBM are usually Indian made stuff, not entirely Chinese. I must also add that HBM, a Dutch operation, bulk buys most of the stuff from lesser Indian/Chinese manufacturers and some better quality ones would not sell to HBM, Zither in India and Huhut in China are just some example because of the pricing. The emphesis on thes eoperations is just to make a lot of money. The quality of the stuff sold is evidence of how cheaplyand badly these stuff are made. As for these ' nano ' whatever inserts, I have two sets of them, DCMT 07s and CCMT 06s and they geometry is incorrect. Neither of them fits either my sandvik nor Glanz tools. The sad thing is that they don't even fit the cheap Chinese one that came with them from bangood. I have some Iscar and Sandvik inserts that fit all the insert holders properly so the problem is with the inserts. If I were you I'd grind some M42 HSS boring bars with a nice radius and I bet you will have a great finish. Thanks for sharing.

Brother, you don't want to put WD-40 on your collets!!! The last thing you want on them is oil. You want them as clean as possible, I'd clean them with brake clean.

a good video would be on how to fix them

Great content. Practice your speeds and feeds. I would bet those inserts are shit as well. The coating under the magnifier didn't look to promising.

仕上げ用のバイトは刃先をラッピングします。 日本では、刃先を殺すと言います。

Wat is je mailadres, ik wil je graag wat informatie sturen.

Buying cheap and saying horrible... Go and put some money to the tools and shut up.