Gunsmithing Recommend a decent solid carbide boring bar for pre-drill chambers

[AnimalMother224]

having a hard time sourcing a decent solid carbide boring bar that is still relatively affordable. anyone have a go to shop to get one from?

 

[colchester]

Look at the offerings by micro 100 they work very well. I also bought a small dia solid carbide bar that takes an insert it works equally well.

 

[dzander]

what diameter is the bore the bar needs to fit into and how deep do you have to bore?

 

[AnimalMother224]

what diameter is the bore the bar needs to fit into and how deep do you have to bore?

lets say min. bore .250 x max depth 2.500.

 

[AnimalMother224]

Look at the offerings by micro 100 they work very well. I also bought a small dia solid carbide bar that takes an insert it works equally well.

thank you !

 

[dzander]

these are from a michigan company ultradex

 

[Wannashootit]

1/4" after you pre-drill?

Second the Micro-100 offerings, but those ultra-skinny carbide bars snap purty easily (no idea how I came to know this) so light cuts are best.
I don't usually drill/bore before reaming, but when I do I drill as large as possible so I can use the most rigid bar that'll fit...

 

[AnimalMother224]

1/4" after you pre-drill?

Second the Micro-100 offerings, but those ultra-skinny carbide bars snap purty easily (no idea how I came to know this) so light cuts are best.
I don't usually drill/bore before reaming, but when I do I drill as large as possible so I can use the most rigid bar that'll fit...

ill run a twist drill in to take the bulk out. .. make it round again with a boring bar then ream. unless im doing something wrong but id prefer to avoid the reamer following the shitty hold a twist drill leaves.

 

[Danny1788]

Try a piloted core drill works really well for me

 

[AnimalMother224]

Try a piloted core drill works really well for me

interesting. roto-broach would work too ... never thought of that

 

[dzander]

I'm not a gunsmith but sell cutting tools for over 40 years.
standard machining practice is to bore for location, ream for size. a reamer just follows the existing hole.

 

[Danny1788]

interesting. roto-broach would work too ... never thought of that

No way I would do that.
This is what I’m talking about. http://pacifictoolandgauge.com/33-piloted-core-drills-nopix-