Fiddly Bit Fixtures

No great invention here, just applying some Engineering to the problem of holding small, round pins so that holes can be drilled and threaded radially.

The problem is illustrated in a YouTube video by John Saunders of NYC CNC where several, nominally identical parts are loaded into a fixture that is clamped using a single clamping tool; a vise.

In reality, parts are never exactly identical, not in length nor in diameter. A compliant fixture is required that has some give so that the clamping force is distributed more evenly over all the little parts in the fixture, holding each more successfully. Continue reading