Ball Screw Assemblies Model BSA - Thomson - #2

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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 Thomson products for a specific application. While defective products will be replaced without charge if promptly returned, no liability is assumed beyond such replacement. * Trademark of Thomson Industries, Inc. THOMSON is registered in the U.S. Patent and Trademark Office and in other countries. Systems, Slides, and Stages - Inch Page 237 For more information, or to place an order, please contact Thomson Industries, at 1-800-554-THOMSON, Fax: 1-800-445-0329, or E-mail at systems@thomsonmail.com. Specifying a Thomson Ball Screw Assembly: 1. Determine your drive requirements (torque, speed, acceleration, etc. 2. Select the part number of the ball screw you have chosen. 3. Place your order with your local authorized Thomson distributor. Part Numbering System BSA-12-B L24 Ball Screw Assembly Components: n 1 Ball Screw Assembly with Ball Nut Mounting Surface (Preloaded or Non-Loaded) n 2 Integrated End Supports with Angular Contact Bearings n 1 Motor and Controller with integrated indexer (optional) Ball Screw Assembly Benefits: n Integrated ball screw, end support, motors and controllers provide complete drive capabilities. n Designed to fit appropriately sized linear guides. n Pre-engineered to meet your system needs. Non-Preloaded Ball Screw Assemblies are predesigned to match the base to pillow block height of 1CA, 1CB and 1CC linear guides. To utilize Ball Screw Assemblies with other linear guides contact the Thomson Systems application engineering department. Ball Screw Assemblies (Non-Preloaded) (Dimension in inches) Part Ball Screw L3 L5 L6 L9 H H3 H1 B B3 B4 R G Number Dia. x Lead BSA-08-F .500 x .200 1.50 0.75 0.38 2.25 1.812 2.35 1.200 3.80 3.20 2.50 1.90 0.19 BSA-12-G .750 x .200 2.00 1.00 0.50 2.437 2.70 1.500 3.80 3.20 2.50 1.90 0.22 BSA-M12-B 12mm x 5mm 1.50 0.75 0.38 2.25 1.812 2.35 1.200 3.80 3.20 2.50 1.90 0.19 BSA-M20-D 20mm x 5mm 2.00 1.00 0.50 2.46 2.437 2.70 1.500 3.80 3.20 2.50 1.90 0.22 Ball Screw Nut Mounting Block Cross-Section Ball Screw Assembly Non-Preloaded Ball Screw Assemblies (Non-Preloaded) (Dimension in inches) Part Ball Screw A2 A3 A8 V2 V3 W2 W3 W4 F3 Number Dia. x Lead BSA-08-F .500 x .200 1.19 1.23 0.48 1.00 0.25 0.95 0.12 1.19 #6-32 BSA-12-G .750 x .200 1.69 1.80 0.72 1.93 0.25 1.33 0.18 1.69 #8-32 BSA-M12-B 12mm x 5mm 1.19 1.23 0.48 1.00 0.25 0.95 0.12 1.19 #6-32 BSA-M20-D 20mm x 5mm 1.69 1.80 0.72 1.93 0.25 1.33 0.18 1.69 #8-32 Type of Assembly Length Ball Screw System Size The SuperSlide has a pre-designed Maximum Acceptable Travel Rate. Calculate maximum rotational speed (rpm) by dividing your required maximum linear speed (in/min) by the corresponding system ball screw lead (in/rev.). Enter the chart with the required system length and your maximum rotational speed. Select the system with a maximum acceptable travel rate curve above the plotted line. Compressive load on the ball screw is a key factor in selecting the proper System. Using maximum load and acceleration requirements, plot compressive load on the left side of the chart. Using System length and compressive load. plot the maximum allowable compressive force on the right chart. Select the System with a rated maximum compressive force above your plotted point. If you have questions concerning your system requirements, contact the Thomson Systems application engineering department. Note: Ball screw should never exceed recommended critical speed. Maximum AcceptableTravel Rate* 100 10 20 30 40 60 100 System Length (in) *80% of Critical Speed 5000 1000 2000 200 500 Rotational Speed (rpm) 200 10 100 1000 10000 100000 18 24 30 36 42 48 54 60 66 72 10000 1000 2000 3000 4000 6000 100 200 300 400 600 Compressive Load on Screw (lbf) Load on Carriage (lbf) Acceleration (ft/s2) 10 6 4 10000 1000 2000 3000 4000 6000 100 200 400 600 Compressive Load on Screw (lbf) System Length (in) 80 80 12 100 60 40 30 12 x 5 NP .5 x .2 P/NP .5 X .5 P 20 x 5 NP .75 x .2 P/NP 1 x 1 P 1 x .25 P 1.5 x 1 P 1.5 x 1.875 P 12 x 5 NP 20 x 5 NP .5 x .2 P/NP .5 X .5 P .75 x .2 P/NP 1.5 x 1 P 1.5 x 1.875 P 1 x 1 P 1 x .25 P