Such as used in a precision toolroom lathe with nominal 1/2" balls ? Is E52100 steel, Rockwell C60 and +-.0001" (one "tenth") good enough...... or +- .00005" (50 millionths) required ?
Amazing the price difference from McMaster Carr.....one can get 50 balls for $7.50 at the "tenth" tolerance but to get to 50 millionth tolerance it cost $8.85 just for 1 ball ! (same alloy, same hardness)
I do have reliable instruments capable of measuring these in tenths (Trimos counterbalanced height gage on surface plate with ultra precision Swiss dial indicator as probe to confirm via moving the ball ever so slightly the highest point of ball) so it would be tempting to order the 50 balls and just select the ones (need 11) that are spot on the same diameter. Thoughts ?
Amazing the price difference from McMaster Carr.....one can get 50 balls for $7.50 at the "tenth" tolerance but to get to 50 millionth tolerance it cost $8.85 just for 1 ball ! (same alloy, same hardness)
I do have reliable instruments capable of measuring these in tenths (Trimos counterbalanced height gage on surface plate with ultra precision Swiss dial indicator as probe to confirm via moving the ball ever so slightly the highest point of ball) so it would be tempting to order the 50 balls and just select the ones (need 11) that are spot on the same diameter. Thoughts ?