No African Plains Game rifle would be seen with a sling swivel on the fore-end, so I needed a barrel band swivel. Sure, I could have bought one when I got my sights, but I got a rotary table, cutters, etc. when I purchased the Grizzley combo, so why not make one of my own design?
Took a chunk of mystery metal (1018, most likely) and chucked it up to clean up the OD.
Lacking a 4-jaw chuck, I set it up for an eccentric bore in the 3-jaw. Probably should have switched the jaws around...
Drilled successively larger holes, up to 11/16, then bored a few thou..finished up at .695 ID for a taper of .696 to .708
Drilled through to locate on rotary table, then (2) counter-bored holes to bolt it in place.
Milled radial contour, then rotated rotary table 90 degrees and milled the ramp contour.
Filed, ground, dremeled to clean up the result of my not-too-rigid set-up, and, at the last minute, ground too much.
Actually didn't swear at all, went upstairs and ordered a band from Midway.
Still think my design was classier, but I just didn't have the energy to repeat the experience.