I cobbled together a rigid reamer holder.

[dustin_drews]

I was dealing with some chatter doing some 300 blackout barrels. And was not 100% happy with the consistency of using floating reamer holders. I tried a JSG, Somma and one other.
Lots of research and studying led me to building this.
I chamber using a TL Haas CNC lathe. I did a 300 blackout chamber with it. This reamer was possessed by the chatter demons…. This eliminated all the issues! You can’t even hear it cut now.
Thanks Mr. Tooley for telling me I was not crazy with my chambering issues. Thanks Rusty Stud for giving me the confidence that the coolant was not the issues.

God Bless,
Dustin


View attachment 1494416

 

[GenePoole]

Sweet. I like the setup; like a TBAS. What do you use to adjust alignment?

 

[B Nettesheim]

Good idea!!

 

[dustin_drews]

I sweep back and forth and rotate around the pilot with a 1/10 indicator.

 

[AlNyhus]

Beautiful workmanship!

 

[Sniperhandle]

I sweep back and forth and rotate around the pilot with a 1/10 indicator.

You definitely think outside the box, Excellent!

 

[Ksracer]

Really nice!

 

[LVLAaron]

After the last barrel I did... this is really interesting. Great design.

 

[WayneShaw]

If you were using this on a manual machine, where you did all the work with the one machine, how long does it take to dial the reamer in? You have axial alignment fore and aft plus up and down. Then radial alignment.

 

[LVLAaron]

If you were using this on a manual machine, where you did all the work with the one machine, how long does it take to dial the reamer in? You have axial alignment fore and aft plus up and down. Then radial alignment.

I don't know anything, but it seems like it would be a supreme hassle on a manual. Having said that... I would love to figure out a rigid setup, but I'm scared of the unknown and everything that comes with it.

 

[dustin_drews]

I indicate with a 6 inch piece of 7/16 solid precision ground carbide. Both radially and angularly using a 1/10 indicator. I then swap out the carbide shank for a Manson reamer. Talking to Manson every part of their Reamer process manufacturing is held to a couple tenths. All the cuts and grinding from the front of the reamer to the rear is done between centers. So they are concentric from front to rear.
l double check the reamer with the indicator on the pilot and push cycle start.
I have only done a couple this way. so far im pleased with the results I have a bunch of them to do today. i should have a better feel for it after today.
God Bless,
‘Dustin