KEY         PRELOADED CONFIGURATION PRELOAD SETTINGS
Part Number
Diagram		 C1 C2 C3 C4 C5 C6 Part
Spec		 Recommended   Maximum Catalog
Page
Preload
Force
(lbs)		 Rated
Load
(lbs)		 Static
Load
(lbs)		 Preload
Force
(lbs)		 Rated
Load
(lbs)		 Static
Load
(lbs)
RP-10 .664-32 .750 .460 .510 2.275 .875 CAD 15 135 1,285   45 105 1,255 PDF
RP-11 .664-32 .750 .460 .510 4.062 .875 CAD 30 270 2,570 90 210 2,510 PDF
RP-15** .664-32 .750 .460 .510 2.275 .875 CAD 3 23 228 8 18 223 PDF
RP-16** .664-32 .750 .460 .510 4.062 .875 CAD 5 45 455 15 35 445 PDF
RP-20 .937-16 1.062 .680† .625 3.765 1.250 CAD 85 765 4,065 255 595 3,895 PDF
RP-21** .937-16 1.062 .680† .625 3.765 1.250 CAD 14 126 736 42 98 708 PDF
RP-30
RP-31		 .937-16 1.000 sq. .797 .830 3.330 1.130 CAD 83 742 6,067 249 576 5,901 PDF
RP-30A .937-16 1.250 .797 .830 4.900 1.130 CAD 165 1,485 8,835 495 1,155 8,505 PDF
RP-32** .937-16 1.000 sq. .797 .830 3.330 1.130 CAD 17 153 1,233 51 119 1,199 PDF
RP-34 1.125-18 1.250 .875 .812 6.312 1.375 CAD 190 1,170 17,610 570 1,330 17,230 PDF
RP-35 1.125-18 1.250 .875 .812 4.300 1.375 CAD 95 855 8,805 285 665 8,615 PDF
RP-36** 1.125-18 1.250 .875 .812 4.300 1.375 CAD 16 144 1,334 48 112 1,302 PDF*
RP-37 1.250-16 1.312 1.000† .840 6.500 1.500 CAD 340 3,060 20,660 1,020 2,380 19,980 PDF
RP-38** 1.250-16 1.312 1.000† .840 6.500 1.500 CAD 60 540 3,840 180 420 3,720 PDF*
RP-40
RP-41		 1.563-18 1.500 sq. 1.150 1.156 4.875 1.630 CAD 163 1,462 12,837 489 1,136 12,511 PDF
RP-40A 1.563-18 1.500 sq. 1.150 1.156 6.280 1.630 CAD 325 2,925 25,675 975 2,275 25,025 PDF
RP-40B 1.563-18 1.875 1.150 1.156 8.750 1.630 CAD 450 4,050 38,550 1,350 3,150 37,650 PDF
RP-42 1.563-18 1.687 1.150 1.030 6.875 1.812 CAD 345 3,105 29,655 1,035 2,415 28,965 PDF
RP-43 1.563-18 1.687 1.150† 1.030 6.650 1.812 CAD 425 3,825 29,575 1,275 2,975 28,725 PDF
RP-44* 1.563-18 1.500 sq. 1.150† 1.316 6.250 1.630 CAD 230 2,070 11,270 690 1,610 10,810 PDF
RP-45 1.625-20 1.687 1.150 1.312 5.550 1.812 CAD 245 2,205 24,255 735 1,715 23,765 PDF
RP-46* 1.625-20 1.687 1.150 1.312 5.550 1.812 CAD 49 441 4,551 147 343 4,453 PDF
RP-47 1.625-20 1.687 1.150 1.312 5.550 1.812 CAD 245 2,205 24,255 735 1,715 23,765 PDF
RP-48 1.563-18 1.687 1.200† 1.062 6.750 1.812 CAD 330 2,970 20,670 990 2,310 20,010 PDF
RP-50 2.548-18 2.625** 1.812 1.980 10.225 2.812 CAD 905 8,145 54,095 2,715 6,335 52,285 PDF
RP-50A
RP-51A		 2.360-18 2.625** 1.930 1.630 12.000 2.812 CAD 1,290 11,610 92,710 3,870 9,030 90,130 PDF
RP-53
RP-54		 1.967-18 2.093 1.350 1.380 6.780 2.313 CAD 425 3,825 44,375 1,275 2,975 43,525 PDF
RP-54A 1.967-18 2.093 1.350 1.380 8.750 2.313 CAD 640 5,760 66,560 1,920 4,480 65,280 PDF
RP-55
RP-56		 2.250-20 2.250 sq. 1.700† 1.780 8.250 2.812 CAD 800 7,200 33,700 2,400 5,600 32,100 PDF
RP-57 2.548-18 2.625 1.613 1.977 9.687 2.812 CAD 1005 9045 56,695 3015 56,695 54,685 PDF
RP-58 2.250-20 2.250 sq. 1.700† 1.630 11.437 2.812 CAD 735 6,615 29,265 2,205 5,145 27,795 PDF
RP-60 3.137-12 3.375** 2.275 2.630 14.250 4.000 CAD 1,980 17,820 140,520 5,940 13,860 136,560 PDF
RP-60A 3.137-12 3.375** 2.275 2.630 16.500 4.000 CAD 2,970 26,730 210,030 8,910 20,790 204,090 PDF
RP-63 3.137-12 3.375** 2.275 2.630 14.250 4.000 CAD 1,980 17,820 140,520 5,940 13,860 136,560 PDF
RP-61 3.000-12 3.250** 2.300† 2.062 14.125 3.750 CAD 2,250 20,250 127,750 6,750 15,750 123,250 PDF
RP-62 3.000-12 3.250** 2.250 2.545 14.125 3.750 CAD 1,800 16,200 128,200 5,400 12,600 124,600 PDF
RP-70 3.625-12 4.000** 2.670 2.437 14.760 4.250 CAD 2,200 19,800 152,800 6,600 15,400 148,400 PDF
RP-71 3.625-12 4.000** 2.670† 2.437 14.760 4.250 CAD 2,650 23,850 152,350 7,950 18,550 147,050 PDF
RP-74 3.340-12 3.375 2.025 2.350 8.260 4.000 CAD 630 5,670 77,370 1,890 4,410 76,110 PDF
RP-75 3.750-12 4.000** 2.760† 2.930 16.625 4.250 CAD 3,250 29,250 171,750 9,750 22,750 165,250 PDF
RP-80 4.325-12 4.750** 3.125 3.380 19.875 5.000 CAD 4,200 37,800 255,800 12,600 29,400 247,400 PDF
RP-90
RP-91		 5.497-12 5.875** 3.756 4.029 25.625 5.875 CAD 8,500 76,500 468,450 25,500 59,500 451,450 PDF
*Stainless Steel Models ••0.125-27 lube port in ball nut body †Units have two sets of tube 180° apart

The three preload examples illustrate the effects of load size and direction on preloaded units. The examples are important in selecting the size of preloaded screw and amount of preload force needed. Note: The products shown in this catalog are intended for industrial use only and should not be used to lift, support or otherwise transport people, unless you obtain a written authorization for each individual application from Rockford Ball Screw Co. The specifications and data in this publication are believed to be accurate and reliable. However, it is the responsibility of the product user to determine the suitability of Rockford Ball Screw products for a specific application.