Looking for a internal o-ring groove tool

[GunsOfNavarone]

I remember starting with understanding carbide insert designations and how convoluted it was. At some point, I got enough to get by and shrugged it off. NOW, I need to breakout beyond my normal set of holders/inserts and need to internal o-ring groove.
The type of insert I need is along this line....

I know I need a boring bar, after that the monkey with the cymbals pops up in my head. Anyone HAVE a tool like this? I'm happy to copy paste, though I need it smaller shank, not because of my work piece, just size of my machine (1/4" to 3/8"), 1/2" would be last choice.

 

[Nutfarmer]

If it's a short run it would be easier to grind a piece of high speed steel to make the tool bitthan to try and find the right piece of carbide tooling . Most people would have the part made be for the right piece of carbide is found.

 

[Ulma Doctor]

i have crossdrilled reclaimed shafting to make boring bars- it is not difficult
grind a small HSS bit as @Nutfarmer astutely pointed out, and secure the bit in the end of the boring bar with a setscrew
it will cost pennies in comparison
if you don't have the HSS, i'd be happy to send a couple pieces-au gratis
send me a pm, if you are interested

 

[Nutfarmer]

Simple boring bars with high speed steel

 

[Ulma Doctor]

i also have some small carbide cylinders that i could grind to a specific need as well

 

[Nutfarmer]

Would be happy to share if I know the size of bore you are working with

 

[mmcmdl]

I have a few top notch bars that I'll lend out , but I think the shipping would be eh ................................ Grind yourself up a HSS tool . If you know your size , post it . We all have plenty of tools already ground .

 

[Flyinfool]

I have used broken drills and end mills to regrind for small specialty cutters.

 

[Liljoebrshooter]

And you probably won't find a bar with that small of a diameter with a insert.
Micro 100 has a lot of choices.
Joe

 

[Liljoebrshooter]

Here is one from shars. Minimum bore is just about 1".

Joe