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Lead Screw Assemblies World Class Lead Screw Assemblies Screw Nut Sets 06 mm 3/16" 10 mm 1/4" 12 mm 3/8" 16 mm 7/16" 1/2" Patented Constant Force Nut Intergrated Motor & Screws NEMA 08 NEMA 11 NEMA 14 NEMA 17 NEMA 23 Linear Motion Solutions • pbclinear.com 1 Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com A Better Lead Screw Assembly As today’s technology and it's capabilities become more sophisticated, greater performance is required from the working parts of machine systems. PBC Linear meets the need for precision linear motion, by equipping themselves with the needed resources in engineering, manufacturing, and quality metrology processes to create the optimal linear actuator. PBC Linear has implemented this focus on precision at all three points of the integrated lead screw system; the screw, the nut, and the motor. Precision CNC Thread Rolling • Standard Precision 0.003 in/ft Patented Anti-Backlash Nut • 2-3 times better than • 2-4 times superior performance verses industry baseline conventional coil spring designs • 100% testing over full • Consistent pre-load over length of the screw the life of the lead screw • Maintenance free self-lubricating design Applications Bottling These applications have a critital need for precision, and Food quiet opteration, maintenance free performance, Processing and life long consistent performance. Medical and Lab Automation Critical applications for clinical diagnosis, blood analyzers, syringe pumps, and other dispense devices The self-lubricating require long lasting precision. polymer nuts operate without external grease and lubrication eliminating the risk of contamination making it ideal for food processing applications. PBC Linear® Lead Screws, Nuts, And Hybrid Linear Actuators Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com A Better Lead Screw Assembly Motor Engineered for Linear Motion • Larger bearings increase thrust capacity and life • Preload on bearings removes axial play, reducing system backlash • Hollow shaft concentricity ensures minimum screw runout which yields longer system life 3D Printing Scanning Automated Retail and Kiosks The quiet All types of 3D printing PTFE coated operation of no processes have benefited with screws and optimized nuts provide consistent metal-to-metal moving parts increased layer resolutions and better surface torque characteristics over the entire length of fits well in retail environments, while the finishes due to the precise metrology built the stroke, which is critical to clean, artifact free maintenance free self-lubrication features into each lead screw system. output in scanning applications. are ideal for remote installations. Linear Motion Solutions • pbclinear.com 1 Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com Screws Nuts Standard Stainless Steel Threads Round Constant Force Anti-Backlash Nut PTFE Coated Threads Triangle Constant Force Metric Sizes Leads Anti-Backlash Nut 1, 2, 4, 5, 6, 8, 10, 16 mm 12, 16, 25 mm Rectangle Constant Force 1, 2, 4, 5, 6, 8, 10, Anti-Backlash Nut 12 mm 12, 16, 25 mm 1, 2, 4, 5, 6, 8, 10, 10 mm 12, 16, 25 mm Threaded Constant Force 6 mm 1, 2, 4, 5, 6, 8, 10, Anti-Backlash Nut 12 mm Inch Sizes Leads 1/2" 0.25", 0.10" 1.00" 7/16" Round Rectangle Standard Nut Standard Nut 3/8" 0.20" 1/4" 0.333" 0.05", 0.50" 3/16" Threaded Triangle Standard Nut Standard Nut 2 PBC Linear® Lead Screws, Nuts, And Hybrid Linear Actuators Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com Motors Journaled Ends NEMA 23 Float Journal Float Journal with Flat Series 47 mm Threaded Journal Float Journal with Keyway Fixed Journal Fixed Journal with Flat NEMA 17 Series Float with Journal End Fixed Journal with Keyway 43 mm Fixed with Journal End End Block Supports NEMA 14 Series 31 mm NEMA 11 Series 16 mm 23 mm 12 mm 7/16", 1/2" NEMA 8 Series 16 mm 10 mm 6 mm 3/8" 1/4", 3/16" Linear Motion Solutions • pbclinear.com 3 Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com Overview of Roll Threading Process Quality In, Quality Out. Precision German CNC Roll Threader 1 Ensures Strong and Accurate Thread Forms 2 Quality starts in house with the OD grind of raw material. CNC controlled machinery provides precision process adjustment and control. Automated in-fee and out-feed provide consistency over the full length of the screw stock. 300 series stainless steel. 1 Pitch Diameter 23 O.D. ground to < 0.0005" (12 µm). Die Die Die Shaft ShaftShaft/Screw Die Die Die Die Engages ShaftHalf Formed Thread Fully Formed Thread Manufacturing 10/06/2017 02:57:59 PM Microscopic inspections of the surface Threadform inspections Meas Result Geo Data X Mag: x3.32 Z Mag: x3.32 <Contour> [mm] finishes occurs at each stage of the validate major and minor profile PITCH AVERAGE ACROSS THREADS 15 manufacturing and coating process. diameters, pitch, flank angle, etc.Pitch Average Gage SET 1, Gauge 1 2.5007mm Maximum screw runout is 10 Flank Angle 60.5908°Crest PitchRad. to Crest Property 0.4440mm 0.6539mmRoot to Crest < 0.001"Date/Time (24.4 start 10/5/2017 µm). 9:30:51 AM 5 Date/Time end 10/5/2017 9:35:11 AM Root 1.3077mm to Pitch DIAMETER 16 mm Root 0.6539mm Rad. LEAD 25 mm Tooth WidthGap 0.4231mm Width # OF STARTS 10 [mm] Die # ??? 70 75 80 85 90 95 100 105 110 115 1.2668mm 1.2322mm Major Dia. Pitch Dia. Meas Result Geo Data X Mag: x8.59 Z Mag: x8.59 <Contour> Meas Result Geo Data X Mag: x2.894 Z Mag: x2.894 <Contour>Minor Dia. [mm] 16.1223mm[mm] 14.8163mm 13.5077mm TOOTH PROFILE Pitch Average DIAMETERS Metrology 10 2.5007mm Flank Angle 10 Flank Angle 60.5908° 60.5908°CrestPitch Rad. to Crest 8 Root to Crest 5 0.4440mm 0.6539mm Root to Pitch Crest Rad. Pitch to Crest 1.3077mm Root 0.6539mm Rad. 0.4440mm 0.6539mm Tooth WidthGap Width 6 0.4231mm 0 1.2668mm 1.2322mm Root to Crest Major Dia. Pitch Dia. Minor Dia. 1.3077mm 16.1223mm 14.8163mm 13.5077mm -5 4 Root to Pitch 0.6539mm Root Rad. -10 ® 2 0.4231mm 4 PBC Linear Lead Screws, Nuts, And HybridTooth WidthLinear ActuatorsGap Width 1.2668mm 1.2322mm -15 Courtesy of Steven Engineering, Inc - (800) 258-92000 - [email protected] - www.stevenengineering.com -20 [mm] [mm] 120 122 124 126 128 130 132 75 80 85 90 95 100 105 110 1 of 1 Progressive Dies Control Automated Straightening Process Raw Material Flow 3 4 This process eliminates errors that are inherent to manual processes. Minimizes runout which To ensure the highest level of lead accuracy, can cause vibration, noise, key process variables such as speed, skew, and premature wear. temperature, and Blank Blank coolantDie flow, Die are preciselyPressure Pressure Die Die monitored. Pressure Pressure Work Rest CL of Skewed Die Work Rest CL of Unskewed Die CL of Skewed Die CL of Unskewed Die Lead accuracy of 0.003"/ft. Automated straightening process yields the highest (76 µm/300 mm), 3 times straightness tolerances available in a lead screw. better than typical industry specifications. Smoother finish makes for longer product life. PBC Linear inspects 100% of the screw length (Up to 20,000 points over PBC Linear Uncoated Finish Quality Screw 72" compared to the competitors data point Competitor Screw Surfaces every 6 inches over the same length). Pitting and Fissures Surface Roughness Linear Motion Solutions • pbclinear.com 5 Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com Pairing Quality with Innovation PTFE Coating Innovative Anti-Backlash Nut 5 6 Constant Force Technology nut utilizes a spring that applies uniform radial pressure to the nut at all stages of the motion profile. Coating reduces Patented Design has: coefficient of friction, increaseing screw efficiency • Greater than 2 times superior and extending life. backlash compensation (Confirmed by Wide variety of optimized leading lab automation customer validation testing) Developed in-house, this custom nut geometries Ability to quickly customize coating process and equipment • Consistent preload over life increases the quality of finish and (Key for system level tuning and consitent eliminates screw flaking. performance over life) • 2–4 times better than traditional designs, as validated by customer testing • Self lubricated (Special PTFE nut formulation developed from 30 plus years of plain bearing knowlege) • Simple 2-piece design Each screw is inspected with a digital microscope to ensure there is no flaking or pitting in the coating surface. Nuts and assemblies are inspected to ensure backlash tolerances meet precise specifications . 6 PBC Linear® Lead Screws, Nuts, And Hybrid Linear Actuators Courtesy of Steven Engineering, Inc - (800) 258-9200 - [email protected] - www.stevenengineering.com Machined End Journals Motor and Screw Optimization for Linear Motion 7 8 Lead screw is precision mounted and matched to a hollow shaft motor. Then I.D. laser welded to the motor. The hollow shaft concentricity minimizes runout less than 0.003" (75 μm). Other features include: • Larger bearings that increase thrust capacity and add longer life • Preload on bearings that removes axial play, reducing Fixed, flat, keyways, and threaded system backlash journals can be machined for multiple lead screw uses. PBC Linear offers customers the ability to customize screw journals for specific applications. • Optional smart motors • Connection via… A H D C E G B2 F B Two dedicated test labs are used Screw journals to establish high can be ground to performance <0.0005" (12um).
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