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Helix Linear PowerAC Acme Screw
Helix Linear PowerAC Acme Screw
Helix Linear Technologies, Inc. specializes in high-quality linear actuation solutions for industries such as medical devices, aerospace, and defense. Founded in 2011, the company focuses on innovative product designs and integrated solutions to enhance productivity and profitability.
Helix manufactures precision Acme screws using thread rolling, milling, or grinding processes. These screws feature centralizing thread forms for smooth performance and are made from rolled and ground alloy and stainless steel, with specifications for lead accuracy and screw dimensions.
The document provides definitions for key terms such as land diameter, pitch diameter, and lead. It explains the differences between thread types, including General Purpose, Centralizing, and Stub Acme threads, and discusses lead accuracy and screw starts.
Guidelines for mounting and pinning Acme flanges are provided, emphasizing proper lubrication and driving torque calculations. The document addresses backlash and offers solutions like the PowerAc No-Lash Flange to reduce it.
Helix offers a wide range of Acme and trapezoidal screws and nuts, with specifications for bronze and plastic materials. The document includes technical data on tensile strength, hardness, and friction coefficients.
Helix Acme screws are used in various applications, including MRI patient tables, CNC laser cutting machines, and solar panel positioning, highlighting their versatility and reliability in demanding environments.
For a complete PowerAc No-Lash Flange assembly, specific components are required. If the uncompensated lash equals or exceeds the pitch, the assembly should be replaced.
Screws with similar lead accuracy can be factory selected for precise synchronicity. Straightening is recommended before, during, and after machining.
Proper lubrication and maintenance extend the life of PowerAc Acme Screws. Efficiency ranges from 15% to 85%, depending on nut material, lubrication, lead, and thread form.
Definitions for static, dynamic, PV, tension, compression, thrust, overturning, and side loads are provided.
Column strength is calculated using a formula considering end fixity, root diameter, and distance between nut and bearing.
Selection involves axial load, speed, length between bearings, and end fixity type.
Specifications for an automatic part feeder include a 5,000 lb load, 36” travel in 10 seconds, and positioning accuracy of ±1/4”.
Critical speed and column loading calculations are outlined, with charts for screw selection and column strength checks.
Users are responsible for determining the suitability of Helix products for specific applications. Defective products will be replaced, but no liability is assumed beyond replacement.
The document provides detailed specifications and procedures for selecting and verifying the appropriate Acme screw and nut assemblies for various applications.
The document provides detailed specifications and configurations for high-performance Acme screws and their assemblies, suitable for various applications including molding machines, packaging equipment, and robotics.
Various sizes of twin-lead Acme screws are listed, detailing their diameter, lead, root diameter, maximum overall length, and maximum usable thread lengths.
Instructions on selecting the appropriate nut, flange, and bearing support configurations are provided.
Screws are available in various materials including alloy steel and stainless steel, with options for rolled, milled, or ground finishes.
Tables with performance data such as lead accuracy, load capacity, and torque requirements for different screw sizes and configurations are included.
Users are advised to consult charts for incomplete thread lengths and use the Twin-Lead Reference Number System for accurate part number configuration.
This document provides technical specifications and guidelines for trapezoidal screws and nuts, focusing on materials, configurations, and performance parameters.
Temperature ranges for different nut materials and various materials for screws are outlined.
Details on configurations for trapezoidal screws, including end configurations and bearing support types, are provided.
Modifiers such as standard, flange, and modified are used to describe the screws and nuts.
Critical speed and column strength charts for trapezoidal screws are included.
Various end machining options are available, with guidelines for selecting bearing supports.
Detailed tables list part numbers, dimensions, materials, and performance metrics for different screw and nut configurations.
Users are advised to consult sales engineers for availability and suitability of products for specific applications.
Detailed specifications for various trapezoidal thread screws and nuts are provided.
Procedures for contacting sales engineers for product availability are outlined.
Technical data is provided with a disclaimer that the user is responsible for determining product suitability.
Recommendations include contacting sales engineers for product availability and considering straightening for screws ordered in random lengths.
Tables provide detailed information on screw assemblies, including part numbers, lengths, materials, pitch, diameter, weight, efficiency, torque, and load capacity.
The document highlights the importance of lead accuracy, standard lengths, and the availability of different screw diameters.
This document provides technical specifications and guidelines for Helix's linear motion applications, focusing on ball screws and Acme screws.
End fixity types are categorized as Free, Simple, and Fixed, each offering different levels of support and restraint.
Locknut threads are designed to retain bearings on screw shafts.
Undercuts or radii are machined to minimize stress concentration at diameter transitions.
Ensuring concentricity in end machining enhances operational smoothness and longevity.
Helix offers various end machining services, including precision cutting and CNC turning.
Various EZZE-MOUNT™ configurations for different nominal diameters and leads are listed.
Helix provides precision ground locknuts for applications requiring high precision.
Standard machined ends are detailed with dimensions and codes.
The document emphasizes the importance of selecting appropriate bearing supports and locknuts for applications with high axial loads.
This document provides detailed specifications and data for EZZE-MOUNT™ screw supports and end machining.
Specifications for both single and double bearing supports are listed.
The importance of selecting the correct bearing support based on application requirements is outlined.
Users are advised to ensure the suitability of Helix products for specific applications.
Tables provide part numbers, dimensions, and maximum axial load capacities for various EZZE-MOUNT™ configurations.
The document highlights the importance of considering the mounting surface and the specific type of bearing for the application.
The document provides technical specifications for the EZZE-MOUNT™ Universal Mount Bearing Support with Flange Mount.
Detailed specifications for different models are listed.
Applications across various industries are detailed, including life sciences, printing & binding, semiconductor, and security-military sectors.
Helix Linear Technologies, 23200 Commerce Park Road, Beachwood, OH 44122 USA. Phone: 216-485-2232 or 1-855-435-4958. Email: [email protected]. Website: helixlinear.com
Catalog excerpts
ACME SCREW ASSEMBLIES helixlinear.com
Open the catalog to page 1
ACME Glossary and Technical Data ACME Modular Assemblies COMPANY Helix is a global supplier to the Medical Device, Life Science, Security, Semiconductor, Aerospace, Electromechanical and Defense industries. Helix leads the linear motion industry by manufacturing the highest quality linear actuation solutions in the world. We focus entirely on manufacturing electromechanical actuation systems that help our customer be more productive and profitable. Our execution of innovative product designs solves real problems for our customers and builds a foundation for long term success. HISTORY Helix was...
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POWER•AC™ ACME SCREW ASSEMBLIES Helix ACME lead screws and nuts ACME SCREWS HELIX PRECISION
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POWERMAC™ ACME SCREW ENGINEERING Helix manufactures precision Acme screws by thread rolling, thread milling, or thread grinding processes. Each process produces high precision screws. Helix Acme screw products feature centralizing thread forms for smooth, no-wedging performance. ROLLED ACME SCREWS Helix offers the largest selection of rolled acme screw sizes in the industry. Rolled thread screws are cost effective and are stocked for quick delivery. GROUND ACME SCREWS Ground thread screws offer higher lead accuracy for applications where positioning tolerances are extremely critical. SCREW TYPE...
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POWER•AC™ ACME SCREW ENGINEERING ACME SCREW ASSEMBLIES GLOSSARY AND TECHNICAL DATA Lead screws position CNC laser cutting machines ACME screws position solar panels ACME THREAD FORM TERMS THREAD TYPES - The Acme thread form, established over 100 years ago, replaced square thread screws, which had straight-sided flanks and were difficult to manufacture. SCREW STARTS - The number of independent threads on the screw shaft; example one, two or four. (See FIG. 2 below) FIG. 2 There are three main classes of Acme thread forms: General Purpose (G), Centralizing (C), and Stub Acme. The General Purpose...
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POWERMAC™ ACME SCREW ENGINEERING H^LIX LINEAR TECHNOLOGIES GLOSSARY AND TECHNICAL DATA (continued) 2D/3D DRILLED AND TAPPED WITH Matched Lead - When multiple screws are used to move a load with precise synchronicity, screws of similar lead accuracy can be factory selected and supplied as sets. Consult factory for matched lead set tolerances. Straightness - Although PowerAc™ Acme Screws are manufactured from straight, cylindrical material, internal stresses may cause the material to bend or yield. When ordering random lengths or cut material without end machining, straightening is recommended....
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POWERMAC™ ACME SCREW E NGINEERING GLOSSARY AND TECHNICAL DATA (continued) DESIGN CONSIDERATIONS (continued) Temperature - With proper lubrication, PowerAc™ Acme Screws with bronze nuts operate efficiently between15°F and 350°F, and plastic nuts between 15°F and 175°F. Consult the factory for low temperature applications. End Machining - To obtain optimum performance of your acme screw assembly, it is recommended that the machining be performed at the Helix factory. Screws may be purchased machined to your specifications or to standard end machining designs shown on page 77. EZZE-MOUNT™- Acme...
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Actual Operating Load P= Nut Dynamic Load Capacity ™ POWER•AC ACME SCREW ENGINEERING APPLICATION EXAMPLE STEP 4 Determine total unsupported length. Total Travel is given as 36 inches, but extra screw length should be considered for travel nut, carriage, and or any extra screw length for over-travel. Based on the travel nut and attachment of the nut to the carriage in this application, it is determined an extra 4” of screw length will be required. (Refer to the dimensional information of the particular nut used). L TOTAL = 36 IN + 4 IN = 40 INCHES The total unsupported length to be used for critical...
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POWERMAC™ ACME SCREW ENGINEERING COLUMN STRENGTH: ACME INCH SCREWS TO USE THIS CHART: Find a point at which the maximum length between bearing support and acme nut intersects the maximum load. Be sure the screw selected is above and to the right of that point. Acme Screws are limited by both Maximum Static Load and Slenderness Ratio. See pages 8-9 for reference description on A-B-C-D end fixity. CRITICAL SPEED: ACME INCH SCREWS TO USE THIS CHART: Determine maximum travel rate required. Determine screw length L. Find point at which travel rate and screw length intersect and select a screw above...
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POWERMAC™ ACME SCREW ENGINEERING QUICK REFERENCE: ACME INCH SCREWS AND NUTS ** Contact our sales engineers. ACME SCREW ASSEMBLIES CADjJI ONLINE A lubricants twin-lead end p.26 screws machining «l EZZE-MOUNT™ bearing supports p. 77 14 HELIX PRECISION LEAD SCREWS 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 Helix products for a specific application. While defective products will be replaced without charge if promptly returned, no liability is assumed beyond such replacement....
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STANDARD HELIX COMPONENTS AND SERVICES Acme Screw CADjJI ONLINE 16 HELIX PRECISION LEAD SCREWS POWERMAC™ ACME SCREW ASSEMBLIES HELIX ACME SCREW AND NUT ASSEMBLIES provide ease of application, as all that is required is installation. Helix assemblies offer turn key solutions that only require a power source (hand operation or motor). All of the elements are available for quick delivery from shelf stock. Component and assembly drawings are available from CAD drawings that can be configured online. Contact our sales engineers for assistance. A lubricants twin-lead end p.26 screws machining «l EZZE-MOUNT™...
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POWERMAC™ ACME SCREW ASSEMBLIES ACME SCREW AND NUT ASSEMBLIES UNIVERSAL MOUNTS ACME SCREW AND NUT ASSEMBLIES FLANGE MOUNTS, PILOT FACING IN See page 27 to configure a part number. NOTE: Dimensions reflect a 1/2" over travel at each end. Add Travel to measurements below for total length. Inch of Travel A (in) B (in) C (in) Page Inch of Travel A (in) B (in) C (in) Page NOTE: Larger screw sizes with EZZE-MOUNT™ bearing mounts are available. Consult factory engineers for details. CADjJI ONLINE 18 HELIX PRECISION LEAD SCREWS NOTE: Dimensions reflect a V2" over travel at each end. Add Travel to measurements...
Open the catalog to page 12All Helix Linear Technologies catalogs and technical brochures
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