What are you machining?

[fizzy]

You are either a sadist or you do not do much cast.
I used to do a lot of hauler plates on the manual lathe and had to wear welding gauntlets whilst cutting the face tapers with the compound slide. Now I do them on the CNC and the worst part is cleaning up afterwards as cast iron is not the best for a lathe and also will set like concrete if flood coolant is used and it is not cleaned up right away.


This is the small ones I do, 13" , most now are bigger, 17" and 19"

I have only ever machined nice high quality free cutting cast iron.
And I thought it should always be done dry?

 

[Hood]

I have only ever machined nice high quality free cutting cast iron.
And I thought it should always be done dry?

Dry is the normal way on a manual lathe but flood helps control the mess on the CNC.

 

[mtt.tr]

I actually love working with Delrin, well usually Acetal but basically the same. It cuts nice and although it makes a mess, as you say, it vacuums up easily. You can take massive cuts, the depth of which is limited by the insert edge length, so with a DNMG 15**** that is a lot off the dia in one hit Only downside is if you need tight tolerances it can take a bit of work, these had to be +0/-0.02 for some strange reason, in fact I had to actually redo one because although it wasn't out of tol the tube was. Normally I measure the tube and make to suite but I was told to make to drawings so that is what I did.

View attachment 229029


Nylon however I hate, horrible bleeding stuff that will slice your fingers off if you are stupid enough to get in the way of the stringers getting wrapped round a chuck. I have had tools pulled out of the turret before with nylon.

On the CNC it is not too bad as you are out of the way.

View attachment 229030

I remember my first go drilling nylon, near knocked my self out with the fumes.

At that tender age might explain somethings lol

 

[Hood]

I remember my first go drilling nylon, near knocked my self out with the fumes.

At that tender age might explain somethings lol

Nylon fumes are not bad, Delrin/Aceatl however are a bit potent. Worst thing is if it catches fire you don't notice until the fumes hit your airways and nearly choke you to death. You can hardly see the Delrin/Acetal burning as it is a tiny surface flame and not noticeable, well until you breath it that is.
I learned my lesson years ago, had a stainless bin full of Acetal swarf and had been welding nearby, eyes started to stream and started choking, couldn't see the flames but knew what it was right away so threw a soaked cloth over the bin then dumped a bucket of water in it


BTW that is an easy way to identify Delrin/Acetal, put a lighter to the edge then have a quick sniff, you will soon know if it is or isn't

 

[mtt.tr]

Nylon fumes are not bad, Delrin/Aceatl however are a bit potent. Worst thing is if it catches fire you don't notice until the fumes hit your airways and nearly choke you to death. You can hardly see the Delrin/Acetal burning as it is a tiny surface flame and not noticeable, well until you breath it that is.
I learned my lesson years ago, had a stainless bin full of Acetal swarf and had been welding nearby, eyes started to stream and started choking, couldn't see the flames but knew what it was right away so threw a soaked cloth over the bin then dumped a bucket of water in it


BTW that is an easy way to identify Delrin/Acetal, put a lighter to the edge then have a quick sniff, you will soon know if it is or isn't

I have such poor sense of smell when i can finally smell something i get an almost immediate headache.

 

[Hood]

I have such poor sense of smell when i can finally smell something i get an almost immediate headache.

I can assure you that you do not need a good sense of smell for identifying Delrin/Acetal by the flame method, the back of your airways will soon inform you

 

[Brad93]

No turning today but just put in a mitutoyo order, some decent offers on at the minute. Would like some metric mics up to 100mm but they’re a lot of money.

Might save for a 0-25 Digital Coolant proof mic, they’re lovely tools.

Also waiting for a reply on a new Noga indicator holder. My old Noga is good but no where near as useful as the articulated types now available.

 

[slim_boy_fat]

Delrin makes a mess? surely not Good thing though it is easily cleaned up.

Looks like you've got an alien species growing/breeding on your machine - and don't call me Shirley.

 

[Hood]

The Mitutoyo QuantuMikes are the dogs dangly bits, have the 0-25 and 25-50 but the 50-75 is just the standard digital type, still good though.

 

[Brad93]

The Mitutoyo QuantuMikes are the dogs dangly bits, have the 0-25 and 25-50 but the 50-75 is just the standard digital type, still good though.

View attachment 229048

What’s the difference between the quantumike and the digimatic coolant proof?

apart from an extra £100

 

[Hood]

The QuantuMike are fast acting, move 2mm per rev instead of 0.5mm of a standard Mic. They use an encoder to get the reading.

 

[Hood]

Also I think the most I paid for mine was not much more than £100, used to be in touch with a guy that was able to source direct and he gave me good prices, sadly he has disappeared off the face of the earth so maybe it wasn't all above board like he assured me it was.

 

[Brad93]

The QuantuMike are fast acting, move 2mm per rev instead of 0.5mm of a standard Mic. They use an encoder to get the reading.

Useful and save a tonne of time

 

[Hood]

Just looked back, it was Oct 2013 I bought the Mics, paid £85 each for the QuantuMikes and £90 for the 2-3" Digi.
Wish he hadn't vanished, last thing I got from him was a 150mm coolant proof caliper for £65 and that was Dec 2017, wish I was still in touch

 

[Hood]

One thing to note, if you do get a DigiMike make sure you lock it before you put it away as the slightest vibration switches them on and the batteries don't last as long that way.

 

[Brad93]

you had a bargain at £85https://www.hroberts-di.com/microme...gimatic-quantumike-micrometer-0-25mm-0-1-p701

 

[Hood]

Aye, only reason I have them

I have seen them cheaper than in your link but I think about £150 is the lowest I have seen advertised.

 

[Hood]

Not machining but for a machine, just got a parcel from Poland with another bargain in it

 

[Hood]

you had a bargain at £85https://www.hroberts-di.com/microme...gimatic-quantumike-micrometer-0-25mm-0-1-p701

Just having a cup of tea and picked up last months MSCDirect flyer.
Sadly they don't seem to be on offer this month but likely will be again next month, so start saving @Brad93

 

[Hitch]

@Hitch what is that?

It's from a kit, Stuart 10V, nothing fancy. It's not perfect, but it runs.