ECM rifling method discussed

[butchlambert]

I was there Jackie, It was an embarrassing moment for Deathstar! Weren't you shooting your 25BR?

 

[tobnpr]

I agree. If the pricing comes out reasonable they might be my next barrel as well.

I'm sure they realize they need to be competitively priced with the high-tier barrelmakers.
He indicated rate of production increases, and labor costs reduced (no stress-relieving, lapping) which will obviously be offset by substantial capital outlay costs. But the ability to precisely and strategically vary groove diameter is a potential gamechanger as this is not possible via cut, button, or hammer forging.

We'll see...

 

[Coyotefurharvester]

12 minutes to rifle a 28" barrel, is that faster or slower than button/cut rifling? My guess is faster.

 

[jackieschmidt]

12 minutes to rifle a 28" barrel, is that faster or slower than button/cut rifling? My guess is faster.

I think pulling, or pushing a carbide button to form rifling might be a little faster.

As for cut rifling, if you figure 20 seconds per stroke cycle, (back and forth), with .0001 removal on each cutting stroke. So on a typical 30 caliber barrel, which has a nominal .004 deep groove, that is 40 strokes minimum on each grove, times 4 for a minimum of 160 cutting cycles. With 20 seconds per cycle, you are looking at a minimum 320 seconds.
I may be off on the actual stroke time, I am judging that by videos.
There are other things involved, that is just the minimum time that the tool is actually cutting.

 

[Coyotefurharvester]

About a hour (53 minutes actual run time) probably right for cut rifling.

 

[butchlambert]

About a hour (53 minutes actual run time) probably right for cut rifling.

I think 10 minutes at most.

 

[Coyotefurharvester]

160 cutting cycles 20 seconds per cycle. 3200 seconds 53.3 minutes. I have not been in a shop that rifles barrels, just wondering. There needs to be a cost advantage to any new machine op, whether time or waste.

 

[butchlambert]

160 cutting cycles 20 seconds per cycle. 3200 seconds 53.3 minutes. I have not been in a shop that rifles barrels, just wondering. There needs to be a cost advantage to any new machine op, whether time or waste.

Jackie said 320 seconds, so that was the reason for my reply. I cannot imagine 53 minutes per barrel. They better have a lot of rifling machines.

 

[L.Sherm]

I've never timed it but once a barrel is setup the actual pulling of the button is about 2 minutes give or take depending on barrel length.

 

[jackieschmidt]

Jackie said 320 seconds, so that was the reason for my reply. I cannot imagine 53 minutes per barrel. They better have a lot of rifling machines.

I missed a zero. Typo.

 

[Rustystud]

I would love to see this process on rifle barrels
Big difference in rifling depth in pistols and rimfires. Rifles having higher pressures and deeper rifling. This would be futuristic hammer forging without the hammer. I could see this being done with an expanding mandrel inside the photoetching film.

 

[Aero]

It will be interesting to see where this goes. Unfortunately, McGowan has developed a pretty bad reputation for itself over the last couple of years. Like a well known reamer company, these things are hard to overcome at both their end and the customer end. I guess they figure a name change will help.

 

[wywindsor]

Im excited to chamber some

Help me find one and I'll have you chamber an extra for my build.