Review on Inch Stainless Steel Ball Bearings: Enhancing Power Transmission Performance and Reliability by Amy Cook

First I received G25 bearings not the advertised G5 quality. That's a big disappointment, but after looking at the bcprecision website, it turns out they don't actually make 3/32" balls out of 440 G5 steel. Measurements taken at 5 different locations on the ball. With a specified nominal diameter of 3/32" (0.09375"): 30 is between -0.00020" and -0.00015" of the nominal diameter. 75 range from -0.00015" to -0.00010" of face value. The maximum min/max deviation per bullet was 0.00005". Conclusion: They are all small, even for the G25. But they are quite constant. That means - lower accuracy, higher accuracy.