![\"\"](\"https:\/\/i0.wp.com\/haveblue.org\/wp-content\/uploads\/2015\/01\/spindle-tipped-5deg.jpg\" "\\"spindle")
<\/a><\/p>\nClamping the part was a little easier than I thought it would be.\u00a0 It’s a heavy beast, and is as long as the entire mill table.\u00a0 There’s a pair of blocks near either end that worked great for aligning it on a a horizontal plane, then I just had to clamp the center section in the vise.\u00a0 I tipped the head forward by 5 degrees to complete the setup.<\/p>\n
I seem to have lost the feeler clamp screw for my trusty Blake Co-Ax indicator, so I used an edge finder to pick up the hole center instead.<\/p>\n I didn’t have a boring bar long enough to plunge all the way through, so I bought one just for this project.\u00a0 I selected a bar tipped with C2 carbide since the cut would be interrupted due to being a slightly different angle than the original hole.\u00a0 I started by setting the boring head to a small enough diameter that it would just start cutting at the bottom of the hole (where the offset between the existing hole and my new cutting axis is greatest).\u00a0 I then adjusted the boring head to make the hole a little larger, set the powerfeed, and bored again.\u00a0 It was long, slow work, but I finally got to the point where I had better than 50% circumference all the way through.\u00a0 Finally, I turned a matching sleeve on the lathe that dad could weld into the axle hole for the whole assembly to ride on an axis pin.<\/p>\n A friend is assembling a new upper for his AR, and one of the components is a Sentry 7 adjustable gas block<\/a>.\u00a0 Unfortunately, the freefloat handguard he’s using makes adjustment of the metering setscrew almost impossible.\u00a0 Dremeling out a simple slot would fix things just fine, but would look pretty ugly – milling the slot would look much cleaner.<\/p>\n<\/a><\/p>\n<\/a><\/p>\n