[{"data":1,"prerenderedAt":343},["ShallowReactive",2],{"spiralflights:\u002Fproducts\u002Fscrew-flight\u002Fvariable-pitch-screw-flight":3,"spiralflights:product-catalogue":186},{"id":4,"title":5,"applications":6,"body":11,"canonicalPath":109,"category":110,"coverImage":110,"date":110,"description":111,"dimensionTable":110,"extension":112,"eyebrow":113,"faq":114,"featuredProductPaths":110,"finalCta":110,"gallery":127,"h1":5,"hero":110,"heroImage":152,"homeFaq":110,"indexable":154,"intro":110,"keywords":155,"locale":110,"manuals":110,"meta":159,"metaTitle":110,"navigation":154,"pageId":160,"pageType":161,"path":162,"process":110,"productFamily":113,"schemaType":163,"seo":164,"solutions":110,"specifications":165,"status":181,"stem":182,"summary":183,"translationKey":110,"updatedAt":184,"videoSection":110,"youtubeVideos":110,"__hash__":185},"pages\u002Fproducts\u002Fscrew-flight\u002Fvariable-pitch-screw-flight.md","Variable-Pitch Screw Flight",[7,8,9,10],"Metered material feeding","Grain handling","Port and bulk-material equipment","Mining and conveying assemblies",{"type":12,"value":13,"toc":99},"minimark",[14,19,23,27,30,34,37,41,44,48,67,71],[15,16,18],"h2",{"id":17},"what-it-is","What it is",[20,21,22],"p",{},"A variable-pitch screw flight changes the distance between consecutive turns along its working length. The change may be stepped or progressive. This geometry is used when material needs to be introduced, spread, compressed or released differently from one section of the screw to another.",[15,24,26],{"id":25},"pitch-schedule-controls-the-product","Pitch schedule controls the product",[20,28,29],{},"The product cannot be defined by one pitch dimension. The drawing should show the starting pitch, every intermediate value, the final pitch, the number of turns in each zone and the axial location of each change. Outside diameter, inside diameter or shaft fit, thickness and hand must be tied to the same datum.",[15,31,33],{"id":32},"manufacturing-and-assembly-route","Manufacturing and assembly route",[20,35,36],{},"The available manufacturing route depends on the section and pitch schedule. A continuous route may suit some profiles, while sectional forming and controlled assembly may be more practical for larger or more complex changes. Final joints, shaft attachment and overall straightness are reviewed as part of the assembly drawing.",[15,38,40],{"id":39},"where-it-is-considered","Where it is considered",[20,42,43],{},"Variable pitch is commonly reviewed for feeding and bulk-material duties, including grain handling, port logistics, mining and general conveying equipment. Suitability depends on the material behaviour and the machine design; the flight alone does not determine capacity.",[15,45,47],{"id":46},"when-to-choose-this-option","When to choose this option",[20,49,50,51,56,57,61,62,66],{},"Use this page when the pitch must change along the screw. For one repeated pitch, start with ",[52,53,55],"a",{"href":54},"\u002Fproducts\u002Fscrew-flight\u002Fcold-rolled-continuous-screw-flight\u002F","cold-rolled continuous screw flight"," or ",[52,58,60],{"href":59},"\u002Fproducts\u002Fscrew-flight\u002Fsectional-spiral-blade\u002F","sectional spiral blade",". For a complete screw on a centre member, review the ",[52,63,65],{"href":64},"\u002Fproducts\u002Fscrew-flight\u002Fshafted-auger-assembly\u002F","shafted auger assembly",".",[15,68,70],{"id":69},"quote-checklist","Quote checklist",[72,73,74,78,81,84,87,90,93,96],"ul",{},[75,76,77],"li",{},"Drawing with the complete pitch schedule and transition positions",[75,79,80],{},"Outside diameter, inside diameter or shaft diameter, and thickness",[75,82,83],{},"Right- or left-hand rotation",[75,85,86],{},"Material grade and incoming material condition",[75,88,89],{},"Total flighted length and required end connections",[75,91,92],{},"Continuous, sectional or complete-assembly supply preference",[75,94,95],{},"Trough or tube clearance and operating orientation",[75,97,98],{},"Conveyed material, duty and quantity",{"title":100,"searchDepth":101,"depth":101,"links":102},"",2,[103,104,105,106,107,108],{"id":17,"depth":101,"text":18},{"id":25,"depth":101,"text":26},{"id":32,"depth":101,"text":33},{"id":39,"depth":101,"text":40},{"id":46,"depth":101,"text":47},{"id":69,"depth":101,"text":70},"\u002Fproducts\u002Fscrew-flight\u002Fvariable-pitch-screw-flight\u002F",null,"Custom variable-pitch screw flight made to a pitch schedule, flight geometry, material and finished assembly drawing.","md","Screw flight",[115,118,121,124],{"question":116,"answer":117},"How should a variable pitch be shown on the drawing?","List each pitch value, the number of turns at that value and the axial position of every transition. A dimensioned side view is preferred to a general note such as progressive pitch.",{"question":119,"answer":120},"Can both diameter and pitch change on the same flight?","The combination can be reviewed, but it needs a complete station-by-station geometry schedule. The manufacturing route and joining plan are confirmed after the drawing is checked.",{"question":122,"answer":123},"Is variable-pitch flighting always supplied as one continuous length?","No. It may be planned as continuous flighting, individual segments or an assembled screw, depending on diameter, thickness, material and total length.",{"question":125,"answer":126},"What information is needed to check clearance?","Provide the trough or tube inside diameter, shaft or centre member, required running clearance and the installed position of bearings or supports.",[128,131,134,137,140,143,146,149],{"src":129,"alt":130},"\u002Fassets\u002Fproducts\u002Fvariable-pitch-screw-flight-detail.webp","Variable-pitch helical flight profiles with changing turn spacing",{"src":132,"alt":133},"\u002Fassets\u002Fproducts\u002Fvariable-pitch-screw-flight-gallery-2.webp","Formed screw flights prepared for variable-pitch conveyor assemblies",{"src":135,"alt":136},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi05_h9ad892c21ec947d79121ec9a53e6d631q.jpg_960x960q80.jpg","Variable-pitch screw flight for custom auger and conveyor applications",{"src":138,"alt":139},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi07_h9bfc65818e624ddbb3cbe6e0194e72aep.jpg_960x960q80.jpg","Custom variable-pitch screw flight with changing helix spacing",{"src":141,"alt":142},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi01_h614c6abf388a4159a7ebe0afaa435020b.jpg_960x960q80.jpg","Variable-pitch auger flight manufactured for material conveying equipment",{"src":144,"alt":145},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi02_h29b5acc070564c798a6be1b2fd89502fk.jpg_960x960q80.jpg","Steel variable-pitch screw flight for conveyor screw assembly",{"src":147,"alt":148},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi06_hce7e29f82f2c46cfa3847a8517e2f23ei.jpg_960x960q80.jpg","Variable-pitch spiral flight designed for controlled material flow",{"src":150,"alt":151},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fvariable-pitch-screw-flight\u002Fi07_hd7cd827e18714d69888fcc5d130b707ek.jpg_960x960q80.jpg","Custom screw flight with variable pitch for industrial auger systems",{"src":138,"alt":153},"Variable-pitch screw flights bundled for shipment",true,[156,157,158],"variable pitch screw flight","progressive pitch auger flight","variable pitch spiral blade",{},"P-SF-12","product","\u002Fproducts\u002Fscrew-flight\u002Fvariable-pitch-screw-flight","Product",{"title":5,"description":111},[166,169,172,175,178],{"label":167,"value":168},"Pitch schedule","State every pitch value, transition position and number of turns",{"label":170,"value":171},"Flight geometry","Confirm outside diameter, inside diameter or shaft fit, thickness and hand",{"label":173,"value":174},"Construction","Continuous or sectional route selected after drawing review",{"label":176,"value":177},"Material","Carbon steel is supported by the available product record; other grades require confirmation",{"label":179,"value":180},"Supply condition","Loose flighting, matched sections or an assembly defined by the drawing","published","products\u002Fscrew-flight\u002Fvariable-pitch-screw-flight","Flighting in which the axial pitch changes along the screw according to an approved schedule rather than remaining constant from end to end.","2026-07-24","j1yi8aqn6KYtn3F3FtQb3kuz_8L-EVt31Vyg0Zny8Ig",[187,194,200,207,214,220,227,233,240,247,254,256,263,271,278,285,292,299,306,313,321,328,336],{"category":113,"title":188,"description":189,"image":190,"to":193},"Square-Bar Flexible Auger","A flexible auger made from a square-section profile, with the bar section, coil geometry and installed tube route reviewed as one system.",{"src":191,"alt":192},"\u002Fassets\u002Fproducts\u002Fsquare-bar-flexible-auger.webp","Square-bar flexible auger coils","\u002Fproducts\u002Fflexible-auger-and-forming-machine\u002Fsquare-bar-flexible-auger\u002F",{"category":113,"title":195,"description":196,"image":197,"to":54},"Cold-Rolled Continuous Screw Flight","Cold-formed strip flighting for applications that need continuous, seamless geometry and controlled pitch, diameter and thickness.",{"src":198,"alt":199},"\u002Fassets\u002Fproducts\u002Fcontinuous-cold-rolled-screw-flight.webp","Cold-rolled continuous screw flights in the workshop",{"category":113,"title":201,"description":202,"image":203,"to":206},"Continuous Constant-Thickness Auger Flight","A continuous mould-winding route for multi-pitch flights where material utilization and consistent wall thickness are priorities.",{"src":204,"alt":205},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fcontinuous-constant-thickness-auger-flight\u002Fimg_20190319_124340.webp","Continuous constant-thickness auger flight","\u002Fproducts\u002Fscrew-flight\u002Fcontinuous-constant-thickness-auger-flight\u002F",{"category":113,"title":208,"description":209,"image":210,"to":213},"Rounded-Edge Spiral Flight","A helical flight whose rounded edge is part of the specified section, requiring profile dimensions as well as the normal helix geometry.",{"src":211,"alt":212},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Frounded-edge-spiral-flight\u002F3.webp","Rounded-edge spiral flight sections","\u002Fproducts\u002Fscrew-flight\u002Frounded-edge-spiral-flight\u002F",{"category":113,"title":215,"description":216,"image":217,"to":59},"Sectional Spiral Blade","Single-pitch, equal-thickness helical segments for large diameter, thick plate, wear-resistant or stainless steel flight assemblies.",{"src":218,"alt":219},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fsectional-spiral-blade\u002Fimg_20190118_145344.jpg","Sectional spiral blade segments",{"category":113,"title":221,"description":222,"image":223,"to":226},"Serrated Sectional Flight","A single-pitch helical segment with a toothed outside edge, made only after the tooth form, helix and assembly duty are defined.",{"src":224,"alt":225},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fserrated-sectional-flight\u002F7.jpg","Serrated sectional flight with toothed outer edge","\u002Fproducts\u002Fscrew-flight\u002Fserrated-sectional-flight\u002F",{"category":113,"title":228,"description":229,"image":230,"to":64},"Shafted Auger Assembly","A complete screw component in which the selected flighting is positioned and joined to a centre tube or shaft with drawing-defined ends.",{"src":231,"alt":232},"\u002Fassets\u002Fproducts\u002Fshafted-auger-assembly.webp","Shafted auger assemblies prepared in the workshop",{"category":113,"title":234,"description":235,"image":236,"to":239},"Shaftless Auger Flight Assembly","A self-supporting open-centre helix for projects where the finished screw is specified without a continuous centre pipe.",{"src":237,"alt":238},"\u002Fassets\u002Fproducts\u002Fshaftless-auger-flight-assembly.webp","Open-centre shaftless auger flight assemblies in the workshop","\u002Fproducts\u002Fscrew-flight\u002Fshaftless-auger-flight-assembly\u002F",{"category":113,"title":241,"description":242,"image":243,"to":246},"Twin-Screw Mixing Flight Set","A coordinated pair of helical flights specified as one working set where hand, pitch, phase and clearance must be checked together.",{"src":244,"alt":245},"\u002Fassets\u002Fproducts\u002Fcontinuous-constant-thickness-auger-flight.webp","Matched screw flights for a twin-screw mixing arrangement","\u002Fproducts\u002Fscrew-flight\u002Ftwin-screw-mixing-flight-set\u002F",{"category":113,"title":248,"description":249,"image":250,"to":253},"Twisted Tape Turbulator","A helical tape insert that promotes tube-side swirling and mixing to improve heat transfer in tubular equipment.",{"src":251,"alt":252},"\u002Fassets\u002Fproducts\u002Ftwisted-tape-turbulator.webp","Twisted tape turbulator insert","\u002Fproducts\u002Fscrew-flight\u002Ftwisted-tape-turbulator\u002F",{"category":113,"title":5,"description":183,"image":255,"to":109},{"src":138,"alt":153},{"category":113,"title":257,"description":258,"image":259,"to":262},"Vertical Auger Beater","Heavy-duty vertical auger and related drive components for breaking and distributing livestock manure and organic fertilizer.",{"src":260,"alt":261},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fshafted-auger-assembly\u002F18.webp","Vertical auger beater for a manure spreader","\u002Fproducts\u002Fscrew-flight\u002Fvertical-auger-beater\u002F",{"category":264,"title":265,"description":266,"image":267,"to":270},"Forming machinery","Continuous Screw Flight Cold Rolling Machine","A model-selection page for workshops planning continuous cold-rolled flight production across different strip widths, thicknesses and output targets.",{"src":268,"alt":269},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fcontinuous-screw-flight-cold-rolling-machine\u002Fimg_20150530_093735.webp","Continuous screw flight cold rolling machine model range","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fcontinuous-screw-flight-cold-rolling-machine\u002F",{"category":264,"title":272,"description":273,"image":274,"to":277},"Continuous Screw Flight Winding Machine","Continuous mould-winding equipment for equal-thickness screw flights where compact installation and parameter adjustment are useful.",{"src":275,"alt":276},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fcontinuous-screw-flight-winding-machine\u002Fimg_20190416_114019.webp","Continuous screw flight winding machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fcontinuous-screw-flight-winding-machine\u002F",{"category":264,"title":279,"description":280,"image":281,"to":284},"GX130-6M Cold Rolling Machine","A continuous screw flight rolling machine for medium strip widths and repeatable output.",{"src":282,"alt":283},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fcontinuous-screw-flight-cold-rolling-machine\u002F30.webp","GX130-6M screw flight cold rolling machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fgx130-6m-cold-rolling-machine\u002F",{"category":264,"title":286,"description":287,"image":288,"to":291},"GX150-10L Cold Rolling Machine","A higher-capacity machine configuration for wider strip, larger flight diameters and increased throughput.",{"src":289,"alt":290},"\u002Fassets\u002Fcold-rolling-machine.webp","GX150-10L screw flight cold rolling machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fgx150-10l-cold-rolling-machine\u002F",{"category":264,"title":293,"description":294,"image":295,"to":298},"GX60-4S Cold Rolling Machine","A compact continuous cold-rolling option for narrower strip and smaller flight ranges.",{"src":296,"alt":297},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fgx60-4s-cold-rolling-machine\u002F52.webp","GX60-4S screw flight cold rolling machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fgx60-4s-cold-rolling-machine\u002F",{"category":264,"title":300,"description":301,"image":302,"to":305},"GX800S Hydraulic Pressing Machine","A hydraulic forming route for sectional spiral blades where larger dimensions, thicker plate or difficult materials need individual control.",{"src":303,"alt":304},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fgx800s-hydraulic-pressing-machine\u002F66.webp","GX800S hydraulic pressing machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fgx800s-hydraulic-pressing-machine\u002F",{"category":264,"title":307,"description":308,"image":309,"to":312},"Sectional Flight Forming Machine Range","A hydraulic forming-machine family for individual spiral blade blanks, ranging from compact 20-ton equipment to a customizable 240-ton configuration.",{"src":310,"alt":311},"\u002Fassets\u002Fproducts\u002Fsmall-sectional-flight-forming-machine.webp","Small sectional flight hydraulic forming machine","\u002Fproducts\u002Fscrew-flight-forming-machine\u002Fsmall-sectional-flight-forming-machine\u002F",{"category":314,"title":315,"description":316,"image":317,"to":320},"Ground screw equipment","Pipe Tapering Machine and Furnace","A hydraulic tapering process coordinated with induction heating to prepare a steel pipe end for the next ground screw production step.",{"src":318,"alt":319},"\u002Fimages\u002Fspiralflights\u002Fproducts\u002Fpipe-tapering-machine-and-furnace\u002F81.webp","Pipe tapering machine and induction heating furnace","\u002Fproducts\u002Fground-screw-production-machinery\u002Fpipe-tapering-machine-and-furnace\u002F",{"category":314,"title":322,"description":323,"image":324,"to":327},"Spiral Forming and Welding Machine","A coordinated machine for winding a spiral directly on pipe and welding during the same forming step.",{"src":325,"alt":326},"\u002Fassets\u002Fspiral-welding-process.webp","Spiral forming and welding machine for ground screw production","\u002Fproducts\u002Fground-screw-production-machinery\u002Fspiral-forming-welding-machine\u002F",{"category":329,"title":330,"description":331,"image":332,"to":335},"Flexible auger systems","Flexible Auger Forming Machine","A roller-based machine route for producing flexible auger coils, planned with the incoming profile, target coil and required line components.",{"src":333,"alt":334},"\u002Fassets\u002Fproducts\u002Fflexible-auger-forming-machine.webp","Flexible auger forming machine with multiple roller stations","\u002Fproducts\u002Fflexible-auger-and-forming-machine\u002Fflexible-auger-forming-machine\u002F",{"category":329,"title":337,"description":338,"image":339,"to":342},"Flexible Auger","Flexible spring-steel auger for moving feed, grain, plastics and similar small particulate materials through a tube-based route.",{"src":340,"alt":341},"\u002Fassets\u002Fproducts\u002Fflexible-auger.webp","Flexible auger for automatic feed systems","\u002Fproducts\u002Fflexible-auger-and-forming-machine\u002Fflexible-auger\u002F",1785311727211]