On the 5" gun for NAVSEA in 1979 the above report showed .75" per minute speed. That leads me to believe it's way faster than single point cut rifling and elimination of hand lapping.It's interesting that they mention value, I wouldn't expect a barrel made that way to be cheap. Every caliber and every twist needs a different electrode and I think they are somewhat consumable. I know the machines are expensive and I believe the process is slow...
Yes and they are out of business. Makes you wonder.Ritter and stark have done it:
The R&S rifling process is propriety and secret and is done using ECM without introducing any stresses on the barrel and is extremely versatile as to what rifling and rate of twist can be incorporated into any barrel. Runout on the barrel is kept to within 0.02mm from chamber to muzzle. This equates to less than .0008″, to put it in US units of measure.
RITTER & STARK – STATE OF THE ART RIFLE BUILDING
We visit a new rifle builder to see just how far technology can go when building a precision rifle.snipercentral.com
We used "Anocut" machines making turbine and compressor disks. Especially on super alloys but, the cobalt and other nasty stuff in the sludge was expensive to ship it out.This is very interesting. I know what I will be doing tonight. Reading everything that I can find on the net about this.
Since 931? Explain please.S&W have been doing their barrels like this since 93 I believe. Interesting process with very beneficial results. I'm surprised more precision barrel makers haven't adopted the ECM rifling.
1993Since 931? Explain please.