Lets hear it for breaking chips

[ltlvt]

I would seriously like to hear some input on how to Consistently break chips. I seem to have little trouble on my Clausing model 100 but with the 5913 now I seem to be getting a lot of birds nesting. Blue chips and hard to deal with. I'm not making anything of value just feeling out the machine now that I have it running. Tonight I was taking about a .010 DOC in some steel and the fine blue chip just kept coming straight out at me to the point I moved to the right because it was about to get me right between the eyes. I know there is some balance between tools with chip breakers actual RPM depth of cut and feed rate. I am looking for the general How to correct birdnesting on the fly type information if that really exist.

At this point trying out the lathe is what I would call the Fore-play stages. Trying to find out what she likes and doesn't like.

 

[Jimsehr]

What kind of tool are you using. I use a hand ground chip breaker in a brazed
Carbide insert and increase the feed. And I would try a bigger depth of cut. I started machining in 1953 when most tools were hand ground. If chip does not break increase feed more.

 

[MyLilMule]

First, you need the proper tool with the correct grind/geometry to actually break a chip. Second, you need to find the right surface speed and feed rate. Third, you need to be taking a depth of cut that will actually break a chip. Forth, you need to be cutting material that will break a chip.

All that has to work together. There's no exact formula.

 

[tq60]

If you Peck cut it will stop cutting for a moment and do same, not good for finish cuts but works everywhere else

Sent from my SM-G781V using Tapatalk

 

[ltlvt]

What kind of tool are you using. I use a hand ground chip breaker in a brazed
Carbide insert and increase the feed. And I would try a bigger depth of cut. I started machining in 1953 when most tools were hand ground. If chip does not break increase feed more.

I was ONE year old when you started machining.

 

[ttabbal]

I was ONE year old when you started machining.

If we start that, he's gonna feel really old. I mean, I was -23.

 

[ChazzC]

If we start that, he's gonna feel really old. I mean, I was -23.

I’m with @ltlvt: a child of 1952: have some respect for your Elders, young whippersnapper!

Thank you for your insight, Mr. @Jimsehr sir.

 

[T Bredehoft]

I'm not THAT old, but I was two when WWII started. I'd dearly love to have a shop to play in, but it's wood now, tools and material are cheaper.

(I was gifted with a long dry (many years) walnut log with a fork in it (about 18" diameter at the small (unforked) end and 45" long recently). Now have it chain-sawed into two pieces each 5" thick. I'm looking forward to getting some idea of what to do with it.

 

[RaisedByWolves]

While I understand the concept of breaking chips I’ve never really cared one way or the other.

If things are getting sporty I just flip the feed engagement lever and carry on.

Having said that, letting a birds nest accumulate under the chuck is a no go.

 

[Parlo]

I prefer shallower cuts with faster feeds to break the chips. If power feeding longitudinally, push the handwheel forward keeping the feed engaged to break a long string, or back off the compound occasionally.