i'm guessing chamfering is to not damage the bore? sorry for the probably dumb question but would something like this work fine to chamfer these: https://www.amazon.com/Deburring-Ext...07ZSFH918&th=1
i'm guessing chamfering is to not damage the bore? sorry for the probably dumb question but would something like this work fine to chamfer these: https://www.amazon.com/Deburring-Ext...07ZSFH918&th=1
I'll defer to the experts:
"The Geissele SAG is manufactured from hardened steel that
has been ground 0.002” under nominal bore diameter. The
outside diameter of the SAG is finely finished and straight to
0.001” over its length. Geissele hardens the SAR so that it
will not wear by sliding exposure to abrasive powder residue,
pull burrs if it slides against misaligned baffles nor allow
abrasive particle to imbed into the surface of the gage.
There can be a wide variation in barrel bore diameters and
bore straightness. 0.002” under nominal bore diameter has
been found to be the best size of the SAG that will fit most
barrels. The long length of the SAG aligns the gage to the
bore; it is not necessary to have a very tight fitting gage with
the long length of the Geissele SAG."
https://geissele.com/amfile/file/dow...bb/product/35/
Yes, just so you're not gouging the bore, and perhaps to make it easier to slip past baffles.
I wouldn't buy the tool, I'd just use a fine file or grind it. Anything that knocks off the corner and leaves a smooth surface would work.
(Alternatively, tell your wife you need to buy a lathe to mount the suppressor :-) )
The drill rods from McMaster Carr come in 3ft or 6ft lengths. I bought a 3ft chunk and cut mine out of the center of the rod where in theory it should be the straightest. I don't have any specialty measuring tools but it rolls smoothly over a thick pane of glass with no discernible wobble. When rotated inside the bore, the reveal on either side of the rod does not change in relation the suppressor. I store it in a chunk of the hard cardboard tube it shipped in that I cut to length.
If I were running a 9" or longer suppressor with a tight bore for caliber, I might opt for the straightest rod I could get my hands on, but for a 6" YHM Turbo T2 I'm perfectly comfortable with the one I'm using.
That's what Geissele seems to say.
FWIW, I just miked my 22 and 30 cal rods and got .214x and .297x.
I don't think it's critical; the idea isn't that the gauge is a slip fit in the bore, it is that there is ore rod inside the barrel than is sticking out into the suppressor, so gravity aligns the rod with the bore. In theory you could use a 22 rod for any bore size by rotating the rifle 360 degrees and watching the rod/suppressor clearance as you go. Heck, that's probably a good idea in any case, as is rotating the rod as mentioned above.
You definitely want the rod setting on the bottom of the bore - if it tilts now you have to wonder how much error that is causing.
Ok I got the 3’ tight tolerance rod from McMaster. I work in manufacturing quality so I had one of my engineers put the rod on a lathe. He cut it in half and squared and chamfered all edges. Roll tested on our granite table for flatness on both was good and the diameter it spot on.
So anyway now I have two 9mm alignment rods and I only need one. I’d be more than happy to give it to someone that needs it. All I ask is you cover shipping. Shitty mods, if this should be in Karma please let me know and I’ll post it there.
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