form 1 tube thickness

General silencer discussion. If you want to talk about a specific silenced rifle or pistol, it is best to do that in the rifle or pistol section for that brand.

All NFA laws apply.

Moderators: mpallett, mr fixit, bakerjw, renegade

Post Reply
dale

form 1 tube thickness

Post by dale »

Is .058 wall thickness enough to cut good threads in for a 9mm pistol suppressor? T-6 aluminium. any machinists have a thread pitch to reccommend?
User avatar
silencertalk
Site Admin
Posts: 33978
Joined: Mon Apr 25, 2005 8:31 am
Location: USA

Post by silencertalk »

I know of a popular maker that uses 0.065 aluminum for their 9mm can.
Gorilla
New Member
Posts: 3
Joined: Thu May 12, 2005 8:54 am

Post by Gorilla »

The height of a thread form, from crest to peak, is mathematically defined by the formula

D=0.866 / N

where D = depth of the V form, from peak to base, and N is the turns per inch. Note that the diameter of the tube is irrelevent. The thickness required varies only with the pitch, with finer pitches requiring less "meat" in the tube than coarser pitches.

Therefore, if you thread the tube 32 TPI, the threads will consume 0.027" of the 0.058" wall, leaving about 0.029". You'll have to decide if this will be strong enough. Personally, I'd go with 0.093 or thicker wall. You can always turn down the OD later after the can is completed.
Post Reply