World Class LEAD SCREW Assemblies Linear Motion Solutions
Screw Nut Sets 06 mm, 10 mm, 12 mm, 16 mm 3/16", 1/4", 3/8", 7/16", 1/2"
Integrated Motor & Screws NEMA 08, 11, 14, 17, 23
Configure Online at pbclinear.com 1-800-962-8979 Engineering Your Linear Motion Solutions
PBC Linear maintains a commitment to bring improved linear motion solutions to market. Since 1983, its goal has been to provide innovative solutions through the development and manufacturing of linear motion com- Manufacturing Agility ponents, mechanical sub-assemblies, and customized Headquartered in Roscoe, Illinois, USA, PBC Linear pro- systems to meet customers’ application and product duction is maximized to produce unmatched quality and needs and specifications. designed specifically for the most complex and meticu- lous applications resulting in ready to install solutions.
The diverse staff of engineers at PBC Linear combine in-depth industry knowledge and decades of experience This allows PBC Linear to provide quiet, smooth, and with a collaborative approach to meet the linear motion reliable linear motion in a wide array of applications, requirements of each application. ranging from very small pick-and-place assemblies and scanners used in lab Global Footprint automation, to heavy- Headquartered with their main manufacturing facilities duty lift systems used in in the USA, PBC Linear also has locations in Europe, and indus-trial manufacturing. SINO Asia, situated to support your production needs globally. Core Competencies
Simplicity Plain Bearings Anti-Backlash Lead Screw Nut Highly accurate rail lengths Joined aluminum and Bonding of Polymer and Constant Force Technology with SIMO® process steel for longer rails Fluoropolymer to Metals is an intuitive leap forward The Simultaneous Integral Integral-V rails and Redi- Developed and refined in nut design for lead screw Milling Operation (SIMO) Rails® are produced by over 26 years, linear plain applications. The result is qualifies the rail to mechanically embedding bearings excel where greater consistency in tolerances that have 6x hardened steel race traditional ball bearings fail. performance and life, and less bow, 2x less twist, and ways onto an anodized a greater resistance to 2x better flatness. aluminum profile. Precise, backlash. durable, and lightweight.
Configure Online at pbclinear.com 1-800-962-8979
Roller Pillow Gliding PBC Linear Technologies Lead Screw Simplicity Integral-V Cam Roller Mechatronics Block Surface Inexpensive • • • • • • • Low Maintenance • • • • • Compact Size • • • Low Noise • • • Multiple Configurations • • • • • • • Washdown Applications • • • • Custom Design Support • • • • • • • Moderate to High Speed • • • • • • • Vacuum and Cleanroom Applications • • • • Food Processing • • • • Ease of Installation • • • •
Linear Motion Solutions • pbclinear.com 1 Screws • p 8–13 Nuts• p 14–20
Standard Stainless Steel Threads
Round Constant Force Anti-Backlash Nut PTFE p 17 Coated Threads
Triangle Constant Force Metric Sizes Leads Anti-Backlash Nut p 15 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 p 20
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 p 19
Inch Sizes Leads
1/2" 0.25", 0.10"
Round Rectangle 1.00" 7/16" Standard Nut Standard Nut p 16 p 20
3/8" 0.20"
1/4" 0.333"
0.05", 0.50" 3/16" Threaded Triangle Standard Nut Standard Nut p 18 p14
2 PBC Linear® Lead Screws, Nuts, and Hybrid Linear Actuators Motors• p 24–55 Journaled Ends• p 21–22
NEMA 23 Series 47 mm Float Journal Float Journal with Flat p 36
Threaded Journal Float Journal with Keyway
Non-Captive Version p 52
Fixed Journal Fixed Journal with Flat
NEMA 17 Series 43 mm p 32 Float with Journal End Fixed Journal with Keyway
Non-Captive Version p 48 Fixed with Journal End
End Block Supports • p 23
NEMA 14 Series 31 mm p 30
Non-Captive Version p 44 16 mm 12 mm 10 mm 6 mm 7/16", 1/2" 3/8" 1/4", 3/16" NEMA 11 Series 23 mm Table of Contents p 28 PBC Linear Partnership Model ...... 0–1 Roll Threading Process Overview...... 4–6 Lead Screw Thread Terminology ...... 7 Non-Captive Version p 42 Lead Screw Overview...... 8 Lead Screw Part Number Configurator ...... 9 Lead Screw Configuration Factors...... 10 Lead Screw Speed Charts ...... 11 NEMA 8 Series Lead Screw Load Charts ...... 12 16 mm Lead Screw PV Load Derate Charts...... 13 p 26 Lead Screw Motors Overview ...... 24–25 Non-Captive Part Number Configurator...... 41 Wiriring Harnesses Diagram...... 56 Full Line of PBC Linear Actutators ...... 57
Linear Motion Solutions • pbclinear.com 3 Building a Better Lead Screw Assembly
World Class Precision German Roll Threading
To ensure the highest level of lead accuracy, key process variables such as speed, skew, temperature, and coolant flow are precisely monitored.
CNC controlled machinery provides precision process adjustment and control.
Automated in-feed and out-feed provide consistency over the full length of the DIE 1 DIE 1 screw stock. DIE 1 ShaftShaft Shaft/Screw DIE 2 DIE 2 DIE 2 Quality Inspections Microscopic inspections of the surface finish PBC Linear Uncoated occurs at each stage of Finish Quality Screw the manufacturing and Competitor Screw Surfaces coating process.
Pitting and Fissures Surface Roughness
4 PBC Linear® Lead Screws, Nuts, and Hybrid Linear Actuators CNC Straightening The only automated straightening process in the USA, yielding the highest straightness tolerances available in a lead screw.
Smoother finish makes for longer product life.
This process eliminates errors that are inherent to manual processes.
Minimizes runout which can cause vibration, noise, and premature wear.
Superior Lead Accuracy PBC Linear inspects 100% of the screw length (Up to 20,000 points over 72" compared to the competitors data point every 6 inches over the same length).
Lead accuracy of 0.003"/ft. (76 µm/300 mm), 3 times better than typical industry specifications.
Climate Controled, In-House Coating Developed in-house, this custom coating process and equipment increases the quality of finish and eliminates screw flaking.
Coating reduces coefficient of friction, increasing screw efficiency and extending life.
Each screw is inspected with a digital microscope to ensure there is no flaking or pitting in the coating surface.
Linear Motion Solutions • pbclinear.com 5 Built for a Long Life of Linear Motion
Pairing a Quality Screw with an Innovative Anti-Backlash Nut Constant Force Technology nut utilizes a spring that applies uniform radial pressure to the nut at all stages of the motion profile.
Available in various geometries for quick customization.
CFT Nut Advantages: • Greater than 2 times superior backlash compensation (Confirmed by leading lab automation customer validation testing) • Consistent preload over life (Key for system level tuning and consistent performance over life) • 2–4 times better than traditional designs, as validated Motors Built by customer testing for Linear • Self lubricated (Special PTFE nut formulation developed from 30 plus years of plain bearing knowledge) Motion
Lead screws are precision mounted and matched to a hollow shaft motor. The hollow shaft concentricity Nuts and assemblies are inspected to ensure backlash minimizes runout less tolerances meet precise specifications . than 0.003" (75 μm).
• Larger bearings increase Quality Testing thrust capacity and add longer life
• Preload on bearings removes axial play, reducing system backlash
• Optional smart motors
Two dedicated test labs are used to establish high performance characteristics. One is designed for load and life where assemblies have run in excess of 2,500 miles without failure, and one is sound-proofed to analyze noise levels.
6 PBC Linear® Lead Screws, Nuts, and Hybrid Linear Actuators Fundamental Triangle Crest Flank Root Pin Diameter Major Thread Terminology Diameter Pitch Fundamental Diameter Crest Fundamental Pitch Triangle Triangle Crest Diameter Flank Minor Flank Root Diameter Root Over Wire Pitch Diameter Pin Diameter Pin Diameter Major Major Diameter Diameter Pitch Pitch Fundamental Diameter Diameter Pitch Pitch Triangle Crest Angle Flank Angle Pitch Flank Minor Minor Diameter Diameter Root Diameter Diameter Over Wire Over Wire Pitch Diameter Pitch Diameter Pin Diameter Major Diameter Pitch Diameter Pitch Angle Flank Angle Pitch Angle Flank Angle Pitch Minor Diameter Diameter Over Wire Single Start – Lead = Pitch Pitch DiameterPitch diameterTwo Startis the – diameterLead = 2 X ofPitch Lead is the axial distance theFour nut Start – Lead = 4 • Pitch Lead Lead Pitch and Lead a theoreticalPitch cylinder that passes advances in one revolutionPitch of the through the threads in such a way screw. The lead is equal to the that the distance between the pitch times the number of starts. thread crests and thread roots is Pitch • starts = lead Angle Flank Angle Pitch equal. In an ideal product, these widths would each equal one-half Flank angle is the angle between of the thread pitch. a flank and the perpendicular Single Start – Lead = Pitch Two Startthread – Lead axis. = 2 XFlank Pitch angles are Four Start – Lead = 4 • Pitch Single Start – Lead = Pitch Two Start – Lead = 2 X Pitch Four Start – Lead = 4 • Pitch Lead Lead Lead Pitch and Lead Lead angle is the angle madePitchLead sometimes termed “half-angle” Pitch Pitch and Lead Pitch Pitch by the pitch helix, with a plane of the thread, but this is only perpendicular to the axis. true when neighboring flanks have identical angles (when the Lead accuracy is the difference threads are symmetrical). between the actual distance traveled verses the theoretical Actual pitch diameter is Single Start – Lead = Pitch Two Start – Lead = 2 X Pitch Four Start – Lead = 4 • Pitch distance traveled based on lead. determined by subtracting the Lead Lead pin diameter times 2 from the Pitch and Lead Pitch Pitch Crests are the top of the threads. measurement taken across the three thread wires. Roots are the bottom of the threads. Internal thread – the minor diameter occurs at the crests Fundamental Flanks are the surfaces between Triangle Crest while the major diameter occurs Flank the crests and roots. Root at the roots. Pin Diameter Pitch is the distance measured Major External thread – the minor parallel to the thread axis, Diameter diameter occurs at the roots Pitch between corresponding points on Diameter Pitch while the major diameter occurs Minor Diameter adjacent threads. Diameter Over Wire at the crests. Pitch Diameter
Angle Flank Angle Pitch Linear Motion Solutions • pbclinear.com 7
Single Start – Lead = Pitch Two Start – Lead = 2 X Pitch Four Start – Lead = 4 • Pitch Lead Lead Pitch and Lead Pitch Pitch 8 Lead Screw Motors Lead Screws & Nuts PBC Linear PBC the coefficients offriction. the coefficients areThe listedefficiencies theoretical valuesby calculated assuming 300 SeriesStainlessSteelwithPTFECoatingOption MetricLeads Lead Screws &Nuts 25 mm 25 10 mm 10 12 mm 12 16 mm 16 8 mm 6 mm 5 mm 4 mm 2 mm 1 mm Leads Diameter 25 16 12 10 8 5 2 1 6 4 mm mm mm mm mm mm mm mm mm mm 6 Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Coated Coated Coated Coated Coated Coated Coated Coated Coated Coated Coating • • • • • • • • mm 6 mm 1 ® 0
6 mm Lead Screws, Nuts, and Hybrid Linear Actuators Linear Hybrid and Nuts, Lead Screws, • • • • • • • • • • 77 84 84 68 60 30 39 71 78 62 51 70 81 81 75 76 mm – – – – 1 - %Efficiency / Nut Leadscrew 0 Metric Screw Diameter mm 10 mm 10 1 84 45 57 83 66 66 28 80 86 52 69 36 71 78 78 21 61 61 74 74 2 • • • • • • • • • • mm 1 12 mm 12 2 40 77 53 56 56 65 71 85 62 62 70 24 81 81 47 31 75 75 67 18 mm
1 6 • • • • • • • • • •
mm 16 mm 16 64 77 77 40 58 45 56 83 33 55 65 72 69 25 70 49 49 14 61 19 1 6
mm Backlash: Dynamic Load: Up to 1.16 kN or 260 lbs. Lead: Diameter: 0.003"/ft or mm micron/300 76.2 Lead accuracy: 0.333” 0.250” 0.20” 0.50” 0.05” 1.00” 0.10” Leads 3 Inch 0.333″ / • • 0.20″ 0.50″ 0.25″ 0.05″ 1.00″ 0.10″ 1 Longer leads have greater backlash greater have leads Longer (0.001–0.010") mm 0.025–0.25 Nut, Standard the anti-backlash performance. Custom designs availablebetter the preload, the higher the Generally, backlash. eliminate or reduce to designed are Nuts Force Constant 6 1 mm–25 mm or 0.05"–0.25" or mm mm–25 1 " 3
Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated Uncoated 1 6 mm–16 mm or 3/16"–1/2" / Coated Coated Coated Coated Coated Coated Coated Coating 1 / • • 4 6 " " 1 (72' lengthmaximumavaiable onallsizes (68"–69 / • 4 3/16″ 3 " 84 88 51 41 / – – – – – – – – – – 8 " 3 - %Efficiency / Nut Leadscrew / 1/4″ • 8 82 76 – – – – – – – – – – – – " 7 IPS Screw Diameter / 1 6 " 3/8″ 57 66 – – – – – – – – – – – – 7 / • 1 6 " 1 / 7/16″ 2
82 87 – – – – – – – – – – – " " useable) 1 /
• • 2 1/2″ " 44 56 65 35 – – – – – – – – – – Lead Screws & Nuts Lead Screw Motors 9