Helix Linear PowerAC Acme Screw
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ACME SCREW ASSEMBLIES helixlinear.com

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...

POWER•AC™ ACME SCREW ASSEMBLIES Helix ACME lead screws and nuts ACME SCREWS HELIX PRECISION

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...

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...

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...

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™-...

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...

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...

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...

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...

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...