{"id":689,"date":"2026-09-18T03:45:10","date_gmt":"2026-09-18T03:45:10","guid":{"rendered":"https:\/\/htdpulley.top\/custom-timing-pulley-drawing-checklist\/"},"modified":"2026-09-18T06:51:00","modified_gmt":"2026-09-18T06:51:00","slug":"custom-timing-pulley-drawing-checklist","status":"publish","type":"post","link":"https:\/\/htdpulley.top\/hi\/custom-timing-pulley-drawing-checklist\/","title":{"rendered":"Custom Timing Pulley Drawing Checklist"},"content":{"rendered":"<p class=\"htd-answer\"><strong>Custom Timing Pulley Drawing Checklist<\/strong> should be approached as a drive-system decision. The useful starting point is the mating belt and machine interface, followed by tooth count, working width, shaft mounting and duty conditions. This guide explains the checks that help an engineer or buyer turn custom timing pulley drawing into an RFQ that can be verified against a catalogue row or drawing.<\/p>\n<nav aria-label=\"Article contents\" class=\"htd-toc\"><strong>In this guide<\/strong><a href=\"#start\">Start with the drive<\/a><a href=\"#geometry\">Geometry and interface<\/a><a href=\"#application\">Application checks<\/a><a href=\"#inspection\">Inspection and maintenance<\/a><a href=\"#rfq\">RFQ checklist<\/a><\/nav>\n<section id=\"start\">\n<h2>Identify the Drive Before Comparing Dimensions<\/h2>\n<p>For custom timing pulley drawing, identify the complete belt marking before comparing pulley diameters. HTD is a curvilinear synchronous system and the nominal pitch must stay associated with its profile family. Record the driver and driven tooth counts when an existing ratio must be preserved. For a new drive, document the target speed ratio, driver speed and expected load before choosing tooth counts. This prevents a component-level decision from overriding the machine requirement.<\/p>\n<figure class=\"htd-figure\"><img alt=\"Start With the Mating Belt and Required Ratio\" class=\"htd-scene\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/hero-custom-1.webp\"\/><\/figure>\n<p>For a replacement project, compare the measured value with the installed belt and machine arrangement before deciding that a catalogue row is equivalent. For a new project, document the design basis so later maintenance teams can understand why the pitch, tooth count and mounting style were selected.<\/p>\n<\/section>\n<section id=\"geometry\">\n<h2>Dimensions That Control the Installation<\/h2>\n<p>A pulley can match pitch and tooth count yet still fail to fit the machine because the bore, hub, flange or axial position differs. Measure the shaft interface, belt-face width, hub projection on both sides and the belt line relative to a stable machine datum. Where a taper bush is used, record both the pulley series and bush code. Where a finished bore is required, include fit, keyway and any retaining method on the drawing.<\/p>\n<figure class=\"htd-figure\"><img alt=\"Capture the Pulley Geometry That Controls Assembly\" class=\"htd-tech-image\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/tech-selection-1.webp\"\/><\/figure>\n<p>For a replacement project, compare the measured value with the installed belt and machine arrangement before deciding that a catalogue row is equivalent. For a new project, document the design basis so later maintenance teams can understand why the pitch, tooth count and mounting style were selected.<\/p>\n<\/section>\n<section id=\"application\">\n<h2>Operating Conditions That Belong in the Selection<\/h2>\n<p>The same nominal custom timing pulley drawing component can see very different service depending on the machine. Starts per hour, reversing, shock loading, continuous operating time, temperature, contamination, cleaning and access for tensioning all influence the drive. A compact automation axis emphasizes repeatable motion and controlled alignment, while a conveyor or process machine may emphasize continuous duty and service access. Supply these conditions instead of asking the pulley to be selected from size alone.<\/p>\n<figure class=\"htd-figure\"><img alt=\"Connect the Selection to Duty and Environment\" class=\"htd-tech-image\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/tech-types-straight-1.webp\"\/><\/figure>\n<p>For a replacement project, compare the measured value with the installed belt and machine arrangement before deciding that a catalogue row is equivalent. For a new project, document the design basis so later maintenance teams can understand why the pitch, tooth count and mounting style were selected.<\/p>\n<\/section>\n<section id=\"inspection\">\n<h2>Inspection Points Before Installation<\/h2>\n<p>Inspection should focus on dimensions that affect the drive: the shaft interface, axial location, tooth condition, face width and any drawing-controlled runout or datum relationship. A generic quality statement does not define acceptance. If a dimensional report, material document or order-specific record is required, identify it before production. During maintenance, watch for flange damage, edge wear, debris and signs that the pulley has moved on the shaft.<\/p>\n<figure class=\"htd-figure\"><img alt=\"Plan Inspection Around Functional Risk\" class=\"htd-scene\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/inspection-cmm-1.webp\"\/><\/figure>\n<p>For a replacement project, compare the measured value with the installed belt and machine arrangement before deciding that a catalogue row is equivalent. For a new project, document the design basis so later maintenance teams can understand why the pitch, tooth count and mounting style were selected.<\/p>\n<\/section>\n<section>\n<h2>Open Questions to Close Before Ordering<\/h2>\n<div class=\"htd-data-grid\">\n<article><strong>Belt identity<\/strong><\/p>\n<p>What exact HTD profile and width is installed or specified?<\/p>\n<\/article>\n<article><strong>Tooth count<\/strong><\/p>\n<p>What ratio or existing tooth count must be preserved?<\/p>\n<\/article>\n<article><strong>Shaft interface<\/strong><\/p>\n<p>What bore, fit, keyway or taper-bush arrangement is required?<\/p>\n<\/article>\n<article><strong>Axial envelope<\/strong><\/p>\n<p>How much hub projection and flange clearance is available?<\/p>\n<\/article>\n<article><strong>Duty<\/strong><\/p>\n<p>What are the speed, load, starts, reversing and operating hours?<\/p>\n<\/article>\n<article><strong>Documents<\/strong><\/p>\n<p>Which drawing, material or inspection records must accompany supply?<\/p>\n<\/article>\n<\/div>\n<\/section>\n<section>\n<h2>Custom Machining Boundary<\/h2>\n<p>Custom machining should change the machine interface without inventing a different tooth system. Fix the belt profile and tooth count first, then define bore, hub, flange, finish and inspection features. If the requested geometry removes too much material or conflicts with the selected catalogue blank, a different construction must be reviewed.<\/p>\n<p>Record the conclusion in the RFQ or drawing so the same decision is visible to engineering, purchasing and inspection.<\/p>\n<\/section>\n<section id=\"rfq\">\n<h2>What to Send With the RFQ<\/h2>\n<p>Send profile, tooth count, belt width, shaft interface, hub\/flange details, quantity, destination and a drawing or replacement measurement sketch. Add speed, ratio, load, center distance and environment for a new drive. Review the <a href=\"https:\/\/htdpulley.top\/hi\/products\/\">\u090f\u091a\u091f\u0940\u0921\u0940 \u0909\u0924\u094d\u092a\u093e\u0926 \u092a\u0930\u093f\u0935\u093e\u0930<\/a>, use the <a href=\"https:\/\/htdpulley.top\/hi\/engineering\/htd-pulley-selection\/\">selection guide<\/a>, or compare the relevant <a href=\"https:\/\/htdpulley.top\/hi\/applications\/\">application notes<\/a>.<\/p>\n<p><a class=\"htd-btn htd-btn-primary\" href=\"#contact\">Prepare Your RFQ<\/a><\/section>\n<section>\n<h2>A Custom Drawing Should Separate Standard and Changed Features<\/h2>\n<p>State which belt-side geometry remains standard and which features are custom. Typical drawing-controlled items include bore, keyway, hub projection, flange arrangement, material, finish and inspection requirements.<\/p>\n<p>Keep measured values, catalogue references and project requirements clearly separated. If a required point is not stated in the relevant catalogue table or approved drawing, include it as an RFQ question or drawing requirement instead of filling the gap with a plausible but unverified value.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Revision Control Prevents an Old Interface From Returning<\/h2>\n<p>Put the drawing revision on the RFQ and final order. If a shaft or hub change is made during machine development, update the controlled drawing rather than relying on the latest email attachment.<\/p>\n<p>The purchasing record should keep a clear link between the machine requirement and the selected pulley. That means the complete belt or profile identity, tooth count, working width and shaft-interface information remain together with the product code. Any special material, finish, controlled tolerance, marking or report requirement should be stated separately so it cannot be mistaken for a universal feature of the whole family.<\/p>\n<\/section>\n<section>\n<h2>Procurement and Documentation<\/h2>\n<p>Once the selection is clear, keep the accepted product identity, quantity, destination and drawing revision on the same purchase line. Standard catalogue parts are normally planned around production-quantity minimums, while larger or higher-value items can be reviewed against the practical order value. Qualified new-client samples of 1\u20135 pieces may be reviewed at sample pricing when the configuration and manufacturing route are suitable.<\/p>\n<p>Mixed-model orders can be consolidated toward a practical order value of about USD 1,500. Special materials and special processes follow the minimum quantity required by that process. Very small one- or two-piece requests are handled only as qualified engineering validation or paid-sample cases rather than retail replacement orders.<\/p>\n<p>Lead time is confirmed after the technical definition is clear. Standard parts are typically planned at 10\u201325 business days, custom components at 20\u201345 business days, and project-based assemblies or related equipment at 45\u2013120 business days where applicable. EXW, FOB, CIF and DAP are commonly supported; FCA, CFR, CPT, CIP and DDP can be discussed for suitable shipments. Treat these as planning ranges, not a shipment promise before order review.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>A Practical Decision Sequence<\/h2>\n<p>Start with tooth family plus every nonstandard shaft, hub, flange, material and inspection feature. Keep the machine requirement separate from the catalogue choice: first identify what the drive must preserve, then compare only the rows or drawings that match that identity. This keeps a familiar-looking pulley from being accepted before its functional interfaces have been checked.<\/p>\n<p>For an existing machine, preserve the original relationship before making changes. For a new design, record the target ratio, operating context and installation envelope so the custom drawing release can be reviewed later without relying on memory or a photograph alone.<\/p>\n<\/section>\n<section class=\"htd-split\">\n<div>\n<h2>Build a Measurement Record<\/h2>\n<p>The most useful measurement set contains profile, pitch, teeth, width, bore, hub, flange, material, tolerance and revision. Mark which values were measured on the machine and which values came from a catalogue or released drawing. When a feature is inaccessible, photograph its relationship to a stable datum and identify it as confirmation-required rather than filling the gap with an assumed value.<\/p>\n<p>Dimension drawings should be viewed at full readable width. Never scale a screenshot and then treat the scaled dimension as a measurement; use the printed value and the correct construction type.<\/p>\n<\/div>\n<div><img src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/tech-dimension-1.webp\" alt=\"HTD pulley dimension reference for custom-pulley drawing release\" class=\"htd-tech-image\" loading=\"lazy\" decoding=\"async\"><\/div>\n<\/section>\n<section>\n<h2>One Failure Mode Worth Avoiding<\/h2>\n<p>A common error is sending a sketch that defines the bore but leaves the belt-side geometry ambiguous. That can produce a part that appears close in the catalogue yet changes ratio, belt line, mounting or service access. Resolve the conflicting feature before requesting price so the quotation refers to one mechanically coherent configuration.<\/p>\n<p>If two candidate configurations remain possible, send both the machine measurements and photographs and the preferred option. The quotation can then identify which interface still needs confirmation instead of silently converting uncertainty into a specification.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Turn the Technical Choice Into a Quote-Ready Line Item<\/h2>\n<div class=\"htd-data-grid\">\n<article><strong>Identity<\/strong><\/p>\n<p>State the HTD\/profile family and complete belt information.<\/p>\n<\/article>\n<article><strong>Geometry<\/strong><\/p>\n<p>Provide the tooth count, working width and relevant dimension or drawing references.<\/p>\n<\/article>\n<article><strong>Mounting<\/strong><\/p>\n<p>Define the bore or bush, shaft data, hub projection and belt-line position where applicable.<\/p>\n<\/article>\n<article><strong>Commercial line<\/strong><\/p>\n<p>Add quantity, destination, required documents and the drawing revision used for the request.<\/p>\n<\/article>\n<\/div>\n<p>When one item above is genuinely unknown, label it for confirmation. A precise open question is more useful than a plausible value that was never measured.<\/p>\n<\/section>\n<section>\n<h2>Questions Buyers Commonly Ask<\/h2>\n<div class=\"htd-faq\">\n<details>\n<summary>What should be confirmed first?<\/summary>\n<p>Confirm tooth family plus every nonstandard shaft, hub, flange, material and inspection feature. That prevents later dimensions from being compared across the wrong product family or installation route.<\/p>\n<\/details>\n<details>\n<summary>What information is most useful for a replacement?<\/summary>\n<p>Send profile, pitch, teeth, width, bore, hub, flange, material, tolerance and revision, plus clear photographs before the old pulley is removed. The photographs preserve axial orientation and neighboring clearances that a loose part cannot show.<\/p>\n<\/details>\n<details>\n<summary>When should a drawing be used?<\/summary>\n<p>Use a controlled drawing whenever the catalogue row does not completely define the shaft interface, hub\/flange arrangement, finish, tolerance or inspection requirement that matters to the machine.<\/p>\n<\/details>\n<\/div>\n<\/section>\n<section>\n<h2>One Drawing Revision Should Control the Custom Interface<\/h2>\n<p>A quote-ready drawing separates the standard belt-side geometry from the features being customized. Show the HTD family, tooth count and working face, then dimension the shaft connection, hub projection and flange positions from clear datums. Material, finish, marking and inspection requirements should be listed only when they are controlled by the order.<\/p>\n<p>Put the revision on both quotation and purchase order. If a machine design changes after the quote, issue a new revision rather than relying on an email sentence that can be separated from the drawing later.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Commercial Planning Starts After the Configuration Is Clear<\/h2>\n<p>Production MOQ, sample route and lead time depend on the selected model and manufacturing route. Standard catalogue parts are normally planned around production quantities. Qualified 1\u20135 piece samples may be reviewed at sample pricing where suitable, while mixed models can be consolidated toward approximately USD 1,500. Special materials and special processes follow their process minimums.<\/p>\n<p>Typical planning ranges are 10\u201325 business days for standard parts and 20\u201345 business days for custom components after technical release. Shipment terms such as EXW, FOB, CIF and DAP can be discussed with the destination; FCA, CFR, CPT, CIP and DDP can be reviewed for suitable orders. Final commitments follow the released specification and quantity.<\/p>\n<\/section>\n<section class=\"htd-applied-guide\">\n<h2>A Custom Drawing Should Separate Standard Tooth Geometry From Machine-Specific Features<\/h2>\n<p>A useful custom drawing starts by naming the mating belt family and preserving the intended HTD tooth system. It then defines the features that change for the machine: tooth count and working width, bore or bush, keyway when applicable, hub projection, flange arrangement, material, finish and the dimensions that require inspection. Keeping standard and custom information separate reduces ambiguity during quotation.<\/p>\n<p>Dimension from stable functional datums rather than from a chain of noncritical surfaces. If axial belt position matters, make the working face or a related shoulder traceable to the shaft datum. If runout or fit is controlled, state the datum and acceptance requirement explicitly. Do not rely on notes such as \u201cprecision fit\u201d or \u201csame as sample\u201d when a measurable requirement can be placed on the drawing.<\/p>\n<p>Use a revision identifier and keep the released drawing with the purchase line. When a prototype changes, update the controlled document rather than leaving the final geometry in email comments or workshop notes.<\/p>\n<\/section>\n<section class=\"htd-applied-guide\">\n<h2>Make the Drawing Control Only What the Project Actually Needs<\/h2>\n<p>A custom HTD pulley drawing should preserve the selected tooth family while clearly defining the nonstandard features that control installation. Typical drawing inputs include tooth count, working width, bore or bush, keyway, hub projection, flange arrangement, material, finish and any dimensions that must be inspected. Avoid adding unnecessary tolerances to features that do not affect function.<\/p>\n<p>The drawing revision should be the common reference for quotation, approval, machining and inspection. If a value changes after quotation, revise the drawing rather than describing the change only in email. This prevents prototype and production orders from drifting into different configurations with the same informal part name.<\/p>\n<div class=\"htd-data-grid\">\n<article><strong>Belt side<\/strong><\/p>\n<p>HTD family, tooth count and working width.<\/p>\n<\/article>\n<article><strong>Shaft side<\/strong><\/p>\n<p>Bore\/bush, keyway, hub, shoulder and retaining features.<\/p>\n<\/article>\n<article><strong>Controlled dimensions<\/strong><\/p>\n<p>Datums, tolerances and inspection points that are functionally required.<\/p>\n<\/article>\n<article><strong>Order data<\/strong><\/p>\n<p>Revision, material\/finish, quantity, marking and required documents.<\/p>\n<\/article>\n<\/div>\n<p>Before release, read the drawing from belt interface to shaft interface and confirm that every mandatory dimension can be manufactured and inspected. Where a standard catalogue value is acceptable, leave it standard instead of creating an unnecessary custom requirement.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>  Custom Timing Pulley Drawing Checklist  should be approached as a drive-system decision. The useful starting point is the mating belt and machine interface, followed by tooth count, working width, shaft mounting and duty conditions. This guide explains the c<\/p>","protected":false},"author":1,"featured_media":730,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1646],"tags":[],"class_list":["post-689","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides"],"_links":{"self":[{"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/posts\/689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/comments?post=689"}],"version-history":[{"count":1,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/posts\/689\/revisions"}],"predecessor-version":[{"id":876,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/posts\/689\/revisions\/876"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/media\/730"}],"wp:attachment":[{"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/media?parent=689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/categories?post=689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/htdpulley.top\/hi\/wp-json\/wp\/v2\/tags?post=689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}