Part Number
Diagram		 Nominal Diameter Threads Per Inch Number
of Starts		 Lead Inch Root
Diameter (Minimum)		 Operating
Load (Pounds)		 Static
Load (Pounds)		 Torque to Raise
1 lb
(in-lb)		 Efficiency Forward
Driving		 Screw
Weight
(lbs/ft)		 3D CAD Drawing Catalog Page
A102520 1/4 20 1 0.0500 0.175 300 1,000 0.027 30% 0.13 CAD PDF
A103712 3/8 12 1 0.0830 0.263 700 2,250 0.041 32% 0.29 CAD PDF
A105010 1/2 10 1 0.1000 0.359 1,250 4,000 0.054 30% 0.52 CAD PDF
A106208 5/8 8 1 0.1250 0.457 1,900 6,250 0.067 30% 0.85 CAD PDF
A106210 5/8 10 1 0.1000 0.483 1,900 6,250 0.061 26% 0.82 CAD PDF
A206210 5/8 10 2 0.2000 0.483 1,900 6.250 0.077 42% 0.84 CAD PDF
A107505 3/4 5 1 0.2000 0.502 2,800 9,000 0.087 37% 1.34 CAD PDF
A107506 3/4 6 1 0.1666 0.537 2,800 9,000 0.083 32% 1.22 CAD PDF
A107510 3/4 10 1 0.1000 0.608 2,800 9,000 0.074 22% 1.12 CAD PDF
A108706 7/8 6 1 0.1660 0.662 3,800 12,250 0.093 29% 1.56 CAD PDF
A108705 7/8 5 1 0.2000 0.626 3,800 12,250 0.097 33% 1.63 CAD PDF
A110004 1 4 1 0.2500 0.700 5,000 16,000 0.114 35% 2.14 CAD PDF
A110005 1 5 1 0.2000 0.750 5,000 16,000 0.107 30% 2.16 CAD PDF
A110010 1 10 1 0.1000 0.857 5,000 16,000 0.095 18% 2.20 CAD PDF
A111205 1 1/8 5 1 0.2000 0.875 6,200 20,000 0.118 27% 2.80 CAD PDF
A112504 1 1/4 4 1 0.2500 0.947 7,800 25,000 0.134 30% 3.38 CAD PDF
A115004 1 1/2 4 1 0.2500 1.196 11,300 36,000 0.155 26% 5.04 CAD PDF
A117504 1 3/4 4 1 0.2500 1.446 15,300 49,900 0.175 23% 7.04 CAD PDF
Screws are precision rolled from 1018 cold rolled steel (except where noted) to Class 2g available in 12 foot lengths. Stainless steel screws (304 S.S) available in 6ft lengths highlighted. Drive torques are based on a well lubricated bronze nuts. There can be a 15%-20% increase in torque if poorly lubricated.

Static and operating loads are calculated using bronze nuts. Additional ACME sizes and thread configurations (Left Hand, Multiple Start, Stub ACME and different materials) are available, consult factory. Machined ends are available per customer specification or Standard end machining; bearing mounts available for selected sizes, consult factory.
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.