03-24-2015, 10:48 PM
Sounds like you should simply get 5mm (.1968") and use those. It wouldn't be out of the norm for a Ford of that era to use them, as American industry hadn't yet perfected the manufacture of the balls for ball bearings and they were (and most still are) imported from Europe.
http://www.mcmaster.com/#standard-steel-balls/=wggb20
$7.89 plus shipping for 100 of them sounds cheap enough. You're going to drop and lose about as many as you actually use when you assemble.
Use one (or a couple) for pressing the shape. Making the "die" would require a ball mill of about 0.3218", so just get an 8mm one and call it good.
http://www.mcmaster.com/#standard-steel-balls/=wggb20
$7.89 plus shipping for 100 of them sounds cheap enough. You're going to drop and lose about as many as you actually use when you assemble.
Use one (or a couple) for pressing the shape. Making the "die" would require a ball mill of about 0.3218", so just get an 8mm one and call it good.