Boring bar question

[yota]

got a couple of boring bars with my lathe. this smaller one is a little over kill, but what kind if insert would this take? it's 1" dia x 23" so would fit in my holder, would just have a bunch sticking out the back since I'm unlikely to be cutting anything that deep. never say never, I guess. how would you even keep that from flexing it you did a deep cut?

 

[benmychree]

It does not take an insert, it takes a HSS tool bit ground for the purpose, Sometimes, it may be necessary to use a boring bar that is seemingly too long to do efficient work, be that as it may, still the job needs to be done, HSS with correct grinding for the work to be done may allow this to be done; sometimes extra length out the back end can allow a heavy mass to be hung on the bar to dampen vibration/ chatter caused by excessive overhang on the cutting tool end. Bottom line, you would not use such a long bar for deep cuts to start with.

 

[yota]

It does not take an insert, it takes a HSS tool bit ground for the purpose, Sometimes, it may be necessary to use a boring bar that is seemingly too long to do efficient work, be that as it may, still the job needs to be done, HSS with correct grinding for the work to be done may allow this to be done; sometimes extra length out the back end can allow a heavy mass to be hung on the bar to dampen vibration/ chatter caused by excessive overhang on the cutting tool end. Bottom line, you would not use such a long bar for deep cuts to start with.

I was thinking they would be shop made HSS.

 

[yota]

here's the other one, looks like a shop made cutter. this bar is shorter.

 

[RaisedByWolves]

It does not take an insert, it takes a HSS tool bit ground for the purpose, Sometimes, it may be necessary to use a boring bar that is seemingly too long to do efficient work, be that as it may, still the job needs to be done, HSS with correct grinding for the work to be done may allow this to be done; sometimes extra length out the back end can allow a heavy mass to be hung on the bar to dampen vibration/ chatter caused by excessive overhang on the cutting tool end. Bottom line, you would not use such a long bar for deep cuts to start with.

This, all of it.

Hanging the toolpost wrench was my favorite way of damping vibrations using a long boring bar for years.

I later got a rubber donut that was part of a forklift undercarriage that just slipped over the bar and made a 3# lead ring out of an old lead hammer to go over it and clamp it to the bar, worked really well.

 

[Ultradog MN]

Sometimes you gotta make a thing that will work.
I call them donkey tools.

 

[Suzuki4evr]

Sometimes you gotta make a thing that will work.
I call them donkey tools.

I always say.....Whatever gets the job done and if it works....it works.