COMPACT BALL SCREW Speed   1.4 1.9 2.8 3.7 4.7 5.7 7.6 Inch/Sec SIZE 4 Type Supply               lbf. SIZE 4 K6C4-105 AC, 3- 900   1125 790       lbf. SIZE 4 K6C4-140 AC, 3-   1125       1125   lbf. SIZE 4 K6A4 AC, 3-     900     1125   lbf. SIZE 6 K6C6 AC, 3-       1700 3375   3375 lbf.