Search results

That's what I did too, but ended up with a beast of wood lathe 1.5m in the z axis

I use a full thread form insert - never had to clean a thread yet

+/- 0.02mm is huge. My experience is that groove tolerance is often within the measurement error of the air gauge with this process

That is correct

meloniting aka salt bath nitriding can also be blotchy in places. We're looking into gas nitriding now which I believe doesn't have the aspect ratio issues salt bath nitriding does

Thanks - I've tried the HRD kits in the AW, didn't work for me...

Does anyone know if these mags will feed a 6mm br in an AI AW?

7" twist 6mm BR ECM Barrel test. Shot in less than ideal conditions with not the most ideal projectiles. Load was thrown together with 68gr Berger FBHPs - Ave: 3070, ES 41, SD 18.3. A really mild loading of old stock VV N135 - 28.9gr. Distance 100yds. Rain made the target wet and group looks...

Not a metallurgist but the short answer is "somewhere in the middle" in terms of durability I suspect. As with most things, a balance is sometimes needed to be struck. Also, it needs to be borne in mind that: Material grades allow for a range of composite materials, the same grade from...

416 does not have the right elasticity to be hammered. So when comparing processes, as most cut/buttoned barrels are made from 416, you are normally inadvertently comparing steels too. 4140 can be hammered, cut and buttoned and would be a much fairer comparison. However in Europe 51Crv4 (6150...

yes

I'm familiar with the EMAG machines, they do not rifle in "seconds". They increase production rates by having multiple spindles in the one machine but even then they do not approach any where near the speed you allude to. EMAG are not the only company with ECM rifling capacity, some have been...

Hypothesis is that hammering slightly increases the density of the material thereby increasing heat hardness and resistance to cracking. I'm unaware of any research on that though. ECM takes around 9 - 15 minutes dependant on barrel length, power supply and other parameters, pricing should not...

416 is contra-indicated for the hammer forging process. However the process does increase the Rockwell C of the bore by, anecdotally, circa 5 - 9 points which at least infers greater durability. As for accuracy, it is recommended that hammered barrels should be stress relieved which would reduce...

Yes and yes. However a peculiarity of the design is that there is a cam on the breech face to close the bolt. Loads of information on this at Swissrifles.com. I have heard of smiths using the tenon from the old barrel as a stub and fitting a new barrel to that, but not what you want if your aim...

If the finish is a dark rather than a light grey, it is probably salt bath nitrided rather than gas nitrided. Salt bath nitriding can leave a white layer that is hard and crusty that needs polishing out. It should have been quenched-polished-quenched as part of the process. I would have a good...

Good news, I hope things get turned around

yeah, the galling thing for me was they used to have a stellar reputation for quality and service. I've never spoken to Dave but have heard he was always willing to give advice personally etc.. For me the issues were always around lead times, delivering to wrong addresses, sales personnel who...

very spendy.... http://www.swindens.org/our-products/4593157800 Really nice piece of kit, really solid - had a price in 2015 for a 4" one ~£700. Would love one but couldn't justify the spend at the time

Check Swissrifles.com on this topic it has been comprehensively covered. Original finish was shellac, from memory TSP has been suggested to clean after rubbing back while being careful not to round corners or remove cartouches.