I am still thinking on the grinder device, it looks like a drive pin on the threaded end, plus a taper. The measuring devices in the red bag, are snap gauges, poor mans inside micrometer. Lower one into a hole/cylinder, loosen the handle, the spring loaded bar snaps out, rock it around to get minimum reading, tighten handle, lift out, and measure with an ordinary micrometer. A pricey tool when new, still useful in a machine shop setting. The double ended cutter is a special drill bit for making recessed screw or rivet holes, double ended so it can be switched when getting dull, think along the lines of a body mans double drill bit. The small pieces in the pics with the calipers, are attachments for a dial indicator, to find top dead center and out of round, again pricey when bought new. The long round items in the red tubes are of course reamers, for wrist pins, king pins, and probably a dozen things on oil well pumps back when brass bushings were more common than roller bearings. The blacksmith made chisel was probably made within 20 miles of right there, looked like an expedient made tool for a special purpose, ideally the wrap, around the missing handle should have been welded, was it?
OK, think I have it, on the hand crank grinder item. If you think of clamping it to a table or bench, the shaft points up, right? there is a drive pin thru the shaft, so something can sit down over the taper, locking it on better to spin. I have seen one similar recently in an antique shop. Essentially it is the spinner for a centrifuge. The missing part is a small frame work, cast, or made of steel rod, fits tightly over the shaft, locks on the pin, the part is about the size of a pie plate. On the outer edge of the "pie plate", are 3-4 or 6 cups, each the size of a baby bottle, when the crank is turned it starts spinning, like an amusement park ride. In the cups you pour fresh cows milk. Once it is spun for a little bit, the cream separates from the milk to the bottom of the cups. Unhook the cups, pour out the milk, then scoop out the cream, to get the percentage of butterfat in the milk. Why? because whole milk is bought and paid for on the percentage of butterfat/cream. The richer the better. Bigger dairies all had one, plus the farmers wife could get cream for her cooking right away. Why its in the shop? May somebody was adapting it to check crude oil percentages? Thats my take.