开云体育

Your local bicycle shop can sell you a 3/16" ball for a few pennies. This is the size used in front wheel hubs, usually 10 per side. Though nice bikes went away from loose-ball parts years ago in favor of industry-standard, precision, annular bearings, there are many millions of bikes on the road using 5/32", 3/16", and 1/4" balls and every shop has some dead parts you can harvest them from.

I've had good luck going to the Ace Hardware across the street for springs and screws from the Hillman assortments. You get a few generic, cup-point set screws and practice altering the points. They're easily turned or filed (I have a Unimat for this kind of stuff).

Tim