Replaceable insert ID questions

[mac1911]

I ordered a set of thread, turning tool holders. When I receive them, the external tool holder has a insert. I am not familiar with.
Returning it is a bit of a hassle and it’s going to cost me nine bucks in shipping.

When I run the numbers on the box, it came in and the tool itself. It comes back with an insert like the one that is on the internal bar.

Maybe I just don’t know how to look up what I’m looking for but when I run the number on the tool and the insert number, it comes back with a three tipped indexable bit. Not the single point bit on this tool.

Is there any advantage ro this style?

I just assume get a box of inserts if possible vs the hassle of returning it.

 

[GrifterGuru]

Gold colour insert is an internal (IR) single-pointing insert with three cutting edges. When one dulls, you spin it to the next and the next until all three are no longer any usable cutting edges..

For the other bar, you will want external single-pointing inserts (ER)

There are two options for these single-pointinfdg inserts. ER/IR 60 which are to cut 60 degree threads, or there are ER/IR 55 for 55 degree thread cutting.

 

[VicHobbyGuy]

I think what you are looking at- the grey metal insert-shaped object- is some sort of support piece or 'washer' which goes under the cutting insert? I have the same puzzlement with a similar tool. And, I don't understand the function of the socket head screw coming in from the side, either.

 

[GeneT45]

The thing on your external cutter is a seat - not an insert. The insert shown on your boring bar likely fits right on top of it. Do you have that number?

GsT

 

[mac1911]

The thing on your external cutter is a seat - not an insert. The insert shown on your boring bar likely fits right on top of it. Do you have that number?

GsT

The bit from the boring bar does fit, but the cutting tip is not in the correct position. I will take a closer look at the box of inserts that came with it, but I’m pretty sure they’re all the same as the one on the internal bar. ?

Came as a set with “free” inserts.
I will look closer at what they sent
Maybe there is 5 of each in the box and I randomly grabbed the IR bit ?

 

[mksj]

Lay down inserts are different for left and right hand, as well as internal and external threading. They are not interchangeable. External holders come with a shim seat to set the angle and support the insert, in addition there are different inserts for partial and full thread. Holder states to use a 16ER. insert

 

[GeneT45]

The IR / ER distinction shouldn't really affect fit - just the angle if you view the cutting edge dead on. I've used the "wrong" insert (IR vs ER ) and never had a problem with it - the relief is normally more than sufficient to ignore the difference (large threads might be an exception). Can you post a photo showing how the cutting tip is positioned incorrectly? Could it be that side adjustment screw?

GsT

 

[mksj]

The insert configuration is different, at least according to Carmex. Your holder/inserts may be different, they also may not thread as well. I am still using the same Carmex inserts for 5+ years and a lot of thread cutting, I am on the third tip.

 

[GeneT45]

The insert configuration is different, at least according to Carmex. Your holder/inserts may be different, they also may not thread as well. I am still using the same Carmex inserts for 5+ years and a lot of thread cutting, I am on the third tip.
View attachment 513509

Interesting. Perhaps it's just the drawing, but that makes it look like the screw wouldn't fit the nut (it would if the proportions were reversed...).

The toolholder thing is understandable - an ER toolholder wouldn't have the front clearance for an internal thread (except in a very large bore). I'll bet an IR insert in an ER would work just fine though.

GsT

 

[mac1911]

Interesting. Perhaps it's just the drawing, but that makes it look like the screw wouldn't fit the nut (it would if the proportions were reversed...).

The toolholder thing is understandable - an ER toolholder wouldn't have the front clearance for an internal thread (except in a very large bore). I'll bet an IR insert in an ER would work just fine though.

GsT

Cutting tip is about 45’ off to left