{"id":683,"date":"2026-09-18T03:44:40","date_gmt":"2026-09-18T03:44:40","guid":{"rendered":"https:\/\/htdpulley.top\/timing-pulley-bore-shaft-guide\/"},"modified":"2026-09-18T06:50:02","modified_gmt":"2026-09-18T06:50:02","slug":"timing-pulley-bore-shaft-guide","status":"publish","type":"post","link":"https:\/\/htdpulley.top\/vi\/timing-pulley-bore-shaft-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t v\u00e0 \u0111o \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 puly \u0111\u1ecbnh th\u1eddi, \u0111\u1ed9 kh\u00edt tr\u1ee5c."},"content":{"rendered":"<p class=\"htd-answer\"><strong>H\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t v\u00e0 \u0111o \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 puly \u0111\u1ecbnh th\u1eddi, \u0111\u1ed9 kh\u00edt tr\u1ee5c.<\/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 timing pulley bore shaft into an RFQ that can be verified against a catalogue row or drawing.<\/p>\n<nav aria-label=\"N\u1ed9i dung b\u00e0i vi\u1ebft\" class=\"htd-toc\"><strong>Trong h\u01b0\u1edbng d\u1eabn n\u00e0y<\/strong><a href=\"#start\">H\u00e3y b\u1eaft \u0111\u1ea7u v\u1edbi vi\u1ec7c l\u00e1i xe.<\/a><a href=\"#geometry\">H\u00ecnh h\u1ecdc v\u00e0 giao di\u1ec7n<\/a><a href=\"#application\">Ki\u1ec3m tra \u0111\u01a1n \u0111\u0103ng k\u00fd<\/a><a href=\"#inspection\">Ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec<\/a><a href=\"#rfq\">danh s\u00e1ch ki\u1ec3m tra y\u00eau c\u1ea7u b\u00e1o gi\u00e1<\/a><\/nav>\n<section id=\"start\">\n<h2>Identify the Drive Before Comparing Dimensions<\/h2>\n<p>For timing pulley bore shaft, 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=\"B\u1eaft \u0111\u1ea7u v\u1edbi d\u00e2y \u0111ai truy\u1ec1n \u0111\u1ed9ng v\u00e0 t\u1ef7 s\u1ed1 truy\u1ec1n c\u1ea7n thi\u1ebft.\" class=\"htd-tech-image\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/tech-bore-1.webp\"\/><\/figure>\n<p>\u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n thay th\u1ebf, h\u00e3y so s\u00e1nh gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c v\u1edbi d\u00e2y \u0111ai \u0111\u00e3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ed1 tr\u00ed m\u00e1y m\u00f3c tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh r\u1eb1ng m\u1ed9t d\u00f2ng trong danh m\u1ee5c l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n m\u1edbi, h\u00e3y ghi l\u1ea1i c\u01a1 s\u1edf thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec sau n\u00e0y c\u00f3 th\u1ec3 hi\u1ec3u l\u00fd do t\u1ea1i sao b\u01b0\u1edbc r\u0103ng, s\u1ed1 r\u0103ng v\u00e0 ki\u1ec3u l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn.<\/p>\n<\/section>\n<section id=\"geometry\">\n<h2>Dimensions That Control the Installation<\/h2>\n<p>M\u1ed9t r\u00f2ng r\u1ecdc c\u00f3 th\u1ec3 kh\u1edbp b\u01b0\u1edbc r\u0103ng v\u00e0 s\u1ed1 r\u0103ng nh\u01b0ng v\u1eabn kh\u00f4ng l\u1eafp v\u1eeba m\u00e1y v\u00ec \u0111\u01b0\u1eddng k\u00ednh l\u1ed7, moay\u01a1, m\u1eb7t b\u00edch ho\u1eb7c v\u1ecb tr\u00ed tr\u1ee5c kh\u00e1c nhau. \u0110o giao di\u1ec7n tr\u1ee5c, chi\u1ec1u r\u1ed9ng m\u1eb7t \u0111ai, \u0111\u1ed9 nh\u00f4 c\u1ee7a moay\u01a1 \u1edf c\u1ea3 hai ph\u00eda v\u00e0 \u0111\u01b0\u1eddng \u0111ai so v\u1edbi m\u1ed9t m\u1ed1c chu\u1ea9n \u1ed5n \u0111\u1ecbnh c\u1ee7a m\u00e1y. N\u1ebfu s\u1eed d\u1ee5ng b\u1ea1c c\u00f4n, h\u00e3y ghi l\u1ea1i c\u1ea3 m\u00e3 s\u1ed1 r\u00f2ng r\u1ecdc v\u00e0 m\u00e3 b\u1ea1c. N\u1ebfu c\u1ea7n l\u1ed7 khoan ho\u00e0n thi\u1ec7n, h\u00e3y ghi r\u00f5 \u0111\u1ed9 l\u1eafp gh\u00e9p, r\u00e3nh then v\u00e0 b\u1ea5t k\u1ef3 ph\u01b0\u01a1ng ph\u00e1p gi\u1eef n\u00e0o tr\u00ean b\u1ea3n v\u1ebd.<\/p>\n<figure class=\"htd-figure\"><img alt=\"N\u1eafm b\u1eaft h\u00ecnh d\u1ea1ng r\u00f2ng r\u1ecdc \u0111i\u1ec1u khi\u1ec3n qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.\" class=\"htd-tech-image\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/tech-selection-1.webp\"\/><\/figure>\n<p>\u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n thay th\u1ebf, h\u00e3y so s\u00e1nh gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c v\u1edbi d\u00e2y \u0111ai \u0111\u00e3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ed1 tr\u00ed m\u00e1y m\u00f3c tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh r\u1eb1ng m\u1ed9t d\u00f2ng trong danh m\u1ee5c l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n m\u1edbi, h\u00e3y ghi l\u1ea1i c\u01a1 s\u1edf thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec sau n\u00e0y c\u00f3 th\u1ec3 hi\u1ec3u l\u00fd do t\u1ea1i sao b\u01b0\u1edbc r\u0103ng, s\u1ed1 r\u0103ng v\u00e0 ki\u1ec3u l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn.<\/p>\n<\/section>\n<section id=\"application\">\n<h2>Operating Conditions That Belong in the Selection<\/h2>\n<p>The same nominal timing pulley bore shaft 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=\"Li\u00ean k\u1ebft vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1edbi nhi\u1ec7m v\u1ee5 v\u00e0 m\u00f4i tr\u01b0\u1eddng.\" class=\"htd-scene\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/main-taper-1.webp\"\/><\/figure>\n<p>\u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n thay th\u1ebf, h\u00e3y so s\u00e1nh gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c v\u1edbi d\u00e2y \u0111ai \u0111\u00e3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ed1 tr\u00ed m\u00e1y m\u00f3c tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh r\u1eb1ng m\u1ed9t d\u00f2ng trong danh m\u1ee5c l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n m\u1edbi, h\u00e3y ghi l\u1ea1i c\u01a1 s\u1edf thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec sau n\u00e0y c\u00f3 th\u1ec3 hi\u1ec3u l\u00fd do t\u1ea1i sao b\u01b0\u1edbc r\u0103ng, s\u1ed1 r\u0103ng v\u00e0 ki\u1ec3u l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn.<\/p>\n<\/section>\n<section id=\"inspection\">\n<h2>Inspection Points Before Installation<\/h2>\n<p>Vi\u1ec7c ki\u1ec3m tra c\u1ea7n t\u1eadp trung v\u00e0o c\u00e1c k\u00edch th\u01b0\u1edbc \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng: giao di\u1ec7n tr\u1ee5c, v\u1ecb tr\u00ed tr\u1ee5c, t\u00ecnh tr\u1ea1ng r\u0103ng, chi\u1ec1u r\u1ed9ng m\u1eb7t r\u0103ng v\u00e0 b\u1ea5t k\u1ef3 \u0111\u1ed9 l\u1ec7ch t\u00e2m ho\u1eb7c m\u1ed1i quan h\u1ec7 chu\u1ea9n n\u00e0o \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong b\u1ea3n v\u1ebd. M\u1ed9t tuy\u00ean b\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng chung chung kh\u00f4ng th\u1ec3 d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ef1 ch\u1ea5p nh\u1eadn. N\u1ebfu c\u1ea7n b\u00e1o c\u00e1o k\u00edch th\u01b0\u1edbc, t\u00e0i li\u1ec7u v\u1eadt li\u1ec7u ho\u1eb7c h\u1ed3 s\u01a1 c\u1ee5 th\u1ec3 theo \u0111\u01a1n \u0111\u1eb7t h\u00e0ng, h\u00e3y x\u00e1c \u0111\u1ecbnh r\u00f5 tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t. Trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec, c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn h\u01b0 h\u1ecfng m\u1eb7t b\u00edch, m\u00e0i m\u00f2n c\u1ea1nh, m\u1ea3nh v\u1ee5n v\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y r\u00f2ng r\u1ecdc \u0111\u00e3 di chuy\u1ec3n tr\u00ean tr\u1ee5c.<\/p>\n<figure class=\"htd-figure\"><img alt=\"L\u1eadp k\u1ebf ho\u1ea1ch ki\u1ec3m tra li\u00ean quan \u0111\u1ebfn r\u1ee7i ro ch\u1ee9c n\u0103ng\" class=\"htd-scene\" decoding=\"async\" loading=\"lazy\" src=\"http:\/\/htdpulley.top\/wp-content\/uploads\/2026\/09\/inspection-cmm-1.webp\"\/><\/figure>\n<p>\u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n thay th\u1ebf, h\u00e3y so s\u00e1nh gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c v\u1edbi d\u00e2y \u0111ai \u0111\u00e3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ed1 tr\u00ed m\u00e1y m\u00f3c tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh r\u1eb1ng m\u1ed9t d\u00f2ng trong danh m\u1ee5c l\u00e0 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ed1i v\u1edbi d\u1ef1 \u00e1n m\u1edbi, h\u00e3y ghi l\u1ea1i c\u01a1 s\u1edf thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00e1c \u0111\u1ed9i b\u1ea3o tr\u00ec sau n\u00e0y c\u00f3 th\u1ec3 hi\u1ec3u l\u00fd do t\u1ea1i sao b\u01b0\u1edbc r\u0103ng, s\u1ed1 r\u0103ng v\u00e0 ki\u1ec3u l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn.<\/p>\n<\/section>\n<section>\n<h2>Open Questions to Close Before Ordering<\/h2>\n<div class=\"htd-data-grid\">\n<article><strong>Nh\u1eadn d\u1ea1ng \u0111ai<\/strong><\/p>\n<p>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 chi\u1ec1u r\u1ed9ng ch\u00ednh x\u00e1c c\u1ee7a HTD \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t ho\u1eb7c ch\u1ec9 \u0111\u1ecbnh l\u00e0 g\u00ec?<\/p>\n<\/article>\n<article><strong>S\u1ed1 r\u0103ng<\/strong><\/p>\n<p>C\u1ea7n duy tr\u00ec t\u1ef7 l\u1ec7 ho\u1eb7c s\u1ed1 l\u01b0\u1ee3ng r\u0103ng hi\u1ec7n c\u00f3 nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n<\/article>\n<article><strong>Giao di\u1ec7n tr\u1ee5c<\/strong><\/p>\n<p>C\u1ea7n b\u1ed1 tr\u00ed l\u1ed7 khoan, \u0111\u1ed9 l\u1eafp gh\u00e9p, r\u00e3nh then ho\u1eb7c b\u1ea1c c\u00f4n nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n<\/article>\n<article><strong>bao tr\u1ee5c<\/strong><\/p>\n<p>Kho\u1ea3ng h\u1edf gi\u1eefa tr\u1ee5c v\u00e0 m\u1eb7t b\u00edch l\u00e0 bao nhi\u00eau?<\/p>\n<\/article>\n<article><strong>Nhi\u1ec7m v\u1ee5<\/strong><\/p>\n<p>T\u1ed1c \u0111\u1ed9, t\u1ea3i tr\u1ecdng, s\u1ed1 l\u1ea7n kh\u1edfi \u0111\u1ed9ng, s\u1ed1 l\u1ea7n \u0111\u1ea3o chi\u1ec1u v\u00e0 s\u1ed1 gi\u1edd ho\u1ea1t \u0111\u1ed9ng l\u00e0 bao nhi\u00eau?<\/p>\n<\/article>\n<article><strong>T\u00e0i li\u1ec7u<\/strong><\/p>\n<p>Nh\u1eefng b\u1ea3n v\u1ebd, v\u1eadt li\u1ec7u ho\u1eb7c h\u1ed3 s\u01a1 ki\u1ec3m tra n\u00e0o ph\u1ea3i \u0111\u01b0\u1ee3c k\u00e8m theo khi giao h\u00e0ng?<\/p>\n<\/article>\n<\/div>\n<\/section>\n<section id=\"rfq\">\n<h2>Nh\u1eefng gi\u1ea5y t\u1edd c\u1ea7n g\u1eedi k\u00e8m theo y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ)<\/h2>\n<p>G\u1eedi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, bao g\u1ed3m s\u1ed1 r\u0103ng, chi\u1ec1u r\u1ed9ng \u0111ai, giao di\u1ec7n tr\u1ee5c, chi ti\u1ebft moay\u01a1\/m\u1eb7t b\u00edch, s\u1ed1 l\u01b0\u1ee3ng, \u0111i\u1ec3m \u0111\u1ebfn v\u00e0 b\u1ea3n v\u1ebd ho\u1eb7c ph\u00e1c th\u1ea3o k\u00edch th\u01b0\u1edbc thay th\u1ebf. Th\u00eam t\u1ed1c \u0111\u1ed9, t\u1ef7 s\u1ed1 truy\u1ec1n, t\u1ea3i tr\u1ecdng, kho\u1ea3ng c\u00e1ch t\u00e2m v\u00e0 m\u00f4i tr\u01b0\u1eddng cho b\u1ed9 truy\u1ec1n \u0111\u1ed9ng m\u1edbi. Xem l\u1ea1i <a href=\"https:\/\/htdpulley.top\/vi\/products\/\">C\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m HTD<\/a>, s\u1eed d\u1ee5ng <a href=\"https:\/\/htdpulley.top\/vi\/engineering\/htd-pulley-selection\/\">h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn<\/a>ho\u1eb7c so s\u00e1nh c\u00e1c y\u1ebfu t\u1ed1 li\u00ean quan <a href=\"https:\/\/htdpulley.top\/vi\/applications\/\">ghi ch\u00fa \u1ee9ng d\u1ee5ng<\/a>.<\/p>\n<p><a class=\"htd-btn htd-btn-primary\" href=\"#contact\">Chu\u1ea9n b\u1ecb y\u00eau c\u1ea7u b\u00e1o gi\u00e1 (RFQ) c\u1ee7a b\u1ea1n.<\/a><\/section>\n<section>\n<h2>The Shaft Interface Is a Controlled Feature<\/h2>\n<p>Record shaft diameter, intended fit, keyway or bush, hub length and the axial belt-line reference. For replacement parts, measure both sides because the hub can be asymmetric.<\/p>\n<p>H\u00e3y t\u00e1ch bi\u1ec7t r\u00f5 r\u00e0ng c\u00e1c gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c, t\u00e0i li\u1ec7u tham kh\u1ea3o trong danh m\u1ee5c v\u00e0 y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n. N\u1ebfu m\u1ed9t \u0111i\u1ec3m c\u1ea7n thi\u1ebft kh\u00f4ng \u0111\u01b0\u1ee3c n\u00eau trong b\u1ea3ng danh m\u1ee5c li\u00ean quan ho\u1eb7c b\u1ea3n v\u1ebd \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t, h\u00e3y \u0111\u01b0a n\u00f3 v\u00e0o nh\u01b0 m\u1ed9t c\u00e2u h\u1ecfi trong y\u00eau c\u1ea7u b\u00e1o gi\u00e1 ho\u1eb7c y\u00eau c\u1ea7u tr\u00ean b\u1ea3n v\u1ebd thay v\u00ec \u0111i\u1ec1n v\u00e0o ch\u1ed7 tr\u1ed1ng b\u1eb1ng m\u1ed9t gi\u00e1 tr\u1ecb h\u1ee3p l\u00fd nh\u01b0ng ch\u01b0a \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Do Not Convert Maximum Bore Into the Ordered Bore<\/h2>\n<p>Where a taper-bush table shows a maximum bore, treat it as a limit for that bush configuration rather than the shaft size to order. The actual shaft and bush code still need to be specified.<\/p>\n<p>H\u1ed3 s\u01a1 mua h\u00e0ng c\u1ea7n th\u1ec3 hi\u1ec7n m\u1ed1i li\u00ean h\u1ec7 r\u00f5 r\u00e0ng gi\u1eefa y\u00eau c\u1ea7u m\u00e1y m\u00f3c v\u00e0 lo\u1ea1i r\u00f2ng r\u1ecdc \u0111\u01b0\u1ee3c ch\u1ecdn. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 lo\u1ea1i d\u00e2y \u0111ai ho\u1eb7c bi\u00ean d\u1ea1ng, s\u1ed1 r\u0103ng, chi\u1ec1u r\u1ed9ng l\u00e0m vi\u1ec7c v\u00e0 th\u00f4ng tin giao di\u1ec7n tr\u1ee5c ph\u1ea3i \u0111\u01b0\u1ee3c ghi r\u00f5 c\u00f9ng v\u1edbi m\u00e3 s\u1ea3n ph\u1ea9m. B\u1ea5t k\u1ef3 y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t n\u00e0o v\u1ec1 v\u1eadt li\u1ec7u, l\u1edbp ho\u00e0n thi\u1ec7n, dung sai ki\u1ec3m so\u00e1t, k\u00fd hi\u1ec7u ho\u1eb7c b\u00e1o c\u00e1o \u0111\u1ec1u ph\u1ea3i \u0111\u01b0\u1ee3c n\u00eau r\u00f5 ri\u00eang bi\u1ec7t \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m chung c\u1ee7a to\u00e0n b\u1ed9 d\u00f2ng s\u1ea3n ph\u1ea9m.<\/p>\n<\/section>\n<section class=\"htd-related-note\">\n<h2>Cross-Family Shaft-Interface Reference<\/h2>\n<p>Another pulley family may use the same general shaft-interface questions without sharing the same belt geometry. The <a href=\"https:\/\/spapulley.com\/engineering\/\" rel=\"noopener\">SPA pulley engineering guides<\/a> are useful as an adjacent reference for taper-bush and shaft-data preparation; do not use SPA groove data as HTD compatibility data.<\/p>\n<\/section>\n<section>\n<h2>Mua s\u1eafm v\u00e0 l\u1eadp h\u1ed3 s\u01a1<\/h2>\n<p>Sau khi l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng, h\u00e3y gi\u1eef nguy\u00ean th\u00f4ng tin v\u1ec1 m\u00e3 s\u1ea3n ph\u1ea9m, s\u1ed1 l\u01b0\u1ee3ng, \u0111i\u1ec3m \u0111\u1ebfn v\u00e0 phi\u00ean b\u1ea3n b\u1ea3n v\u1ebd \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn tr\u00ean c\u00f9ng m\u1ed9t d\u00f2ng \u0111\u01a1n \u0111\u1eb7t h\u00e0ng. C\u00e1c b\u1ed9 ph\u1eadn ti\u00eau chu\u1ea9n trong danh m\u1ee5c th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00ean k\u1ebf ho\u1ea1ch d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t t\u1ed1i thi\u1ec3u, trong khi c\u00e1c m\u1eb7t h\u00e0ng l\u1edbn h\u01a1n ho\u1eb7c c\u00f3 gi\u00e1 tr\u1ecb cao h\u01a1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t d\u1ef1a tr\u00ean gi\u00e1 tr\u1ecb \u0111\u01a1n \u0111\u1eb7t h\u00e0ng th\u1ef1c t\u1ebf. C\u00e1c m\u1eabu s\u1ea3n ph\u1ea9m t\u1eeb kh\u00e1ch h\u00e0ng m\u1edbi (1-5 chi\u1ebfc) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t v\u1edbi gi\u00e1 m\u1eabu n\u1ebfu c\u1ea5u h\u00ecnh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c s\u1ea3n xu\u1ea5t ph\u00f9 h\u1ee3p.<\/p>\n<p>C\u00e1c \u0111\u01a1n \u0111\u1eb7t h\u00e0ng nhi\u1ec1u m\u1eabu m\u00e3 kh\u00e1c nhau c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ed9p l\u1ea1i \u0111\u1ec3 c\u00f3 gi\u00e1 tr\u1ecb \u0111\u01a1n h\u00e0ng th\u1ef1c t\u1ebf kho\u1ea3ng 1.500 USD. V\u1eadt li\u1ec7u \u0111\u1eb7c bi\u1ec7t v\u00e0 quy tr\u00ecnh \u0111\u1eb7c bi\u1ec7t tu\u00e2n theo s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u c\u1ea7n thi\u1ebft c\u1ee7a quy tr\u00ecnh \u0111\u00f3. C\u00e1c y\u00eau c\u1ea7u r\u1ea5t nh\u1ecf ch\u1ec9 g\u1ed3m m\u1ed9t ho\u1eb7c hai s\u1ea3n ph\u1ea9m ch\u1ec9 \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m \u0111\u1ecbnh k\u1ef9 thu\u1eadt \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n ho\u1eb7c m\u1eabu c\u00f3 tr\u1ea3 ph\u00ed ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u01a1n \u0111\u1eb7t h\u00e0ng thay th\u1ebf b\u00e1n l\u1ebb.<\/p>\n<p>Th\u1eddi gian giao h\u00e0ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh sau khi \u0111\u1ecbnh ngh\u0129a k\u1ef9 thu\u1eadt r\u00f5 r\u00e0ng. C\u00e1c b\u1ed9 ph\u1eadn ti\u00eau chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00ean k\u1ebf ho\u1ea1ch trong v\u00f2ng 10-25 ng\u00e0y l\u00e0m vi\u1ec7c, c\u00e1c linh ki\u1ec7n t\u00f9y ch\u1ec9nh trong v\u00f2ng 20-45 ng\u00e0y l\u00e0m vi\u1ec7c, v\u00e0 c\u00e1c c\u1ee5m l\u1eafp r\u00e1p theo d\u1ef1 \u00e1n ho\u1eb7c thi\u1ebft b\u1ecb li\u00ean quan trong v\u00f2ng 45-120 ng\u00e0y l\u00e0m vi\u1ec7c (n\u1ebfu c\u00f3). C\u00e1c \u0111i\u1ec1u kho\u1ea3n EXW, FOB, CIF v\u00e0 DAP th\u01b0\u1eddng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3; FCA, CFR, CPT, CIP v\u00e0 DDP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn cho c\u00e1c l\u00f4 h\u00e0ng ph\u00f9 h\u1ee3p. H\u00e3y coi \u0111\u00e2y l\u00e0 ph\u1ea1m vi k\u1ebf ho\u1ea1ch, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 cam k\u1ebft giao h\u00e0ng tr\u01b0\u1edbc khi xem x\u00e9t \u0111\u01a1n \u0111\u1eb7t h\u00e0ng.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Tr\u00ecnh t\u1ef1 quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf<\/h2>\n<p>Start with shaft diameter, fit requirement, key\/bush method and hub length. 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 shaft-interface definition can be reviewed later without relying on memory or a photograph alone.<\/p>\n<\/section>\n<section class=\"htd-split\">\n<div>\n<h2>X\u00e2y d\u1ef1ng h\u1ed3 s\u01a1 \u0111o l\u01b0\u1eddng<\/h2>\n<p>The most useful measurement set contains shaft measurement, key or bush details, hub projection, axial datum and drawing. 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>B\u1ea3n v\u1ebd k\u00edch th\u01b0\u1edbc c\u1ea7n \u0111\u01b0\u1ee3c xem \u1edf \u0111\u1ed9 r\u1ed9ng t\u1ed1i \u0111a d\u1ec5 \u0111\u1ecdc. Kh\u00f4ng bao gi\u1edd ph\u00f3ng to \u1ea3nh ch\u1ee5p m\u00e0n h\u00ecnh r\u1ed3i d\u00f9ng k\u00edch th\u01b0\u1edbc \u0111\u00e3 ph\u00f3ng to \u0111\u00f3 l\u00e0m s\u1ed1 \u0111o th\u1ef1c t\u1ebf; h\u00e3y s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb in tr\u00ean b\u1ea3n v\u1ebd v\u00e0 lo\u1ea1i k\u1ebft c\u1ea5u ch\u00ednh x\u00e1c.<\/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 bore and shaft-interface definition\" class=\"htd-tech-image\" loading=\"lazy\" decoding=\"async\"><\/div>\n<\/section>\n<section>\n<h2>M\u1ed9t ki\u1ec3u l\u1ed7i c\u1ea7n tr\u00e1nh<\/h2>\n<p>A common error is quoting a bore diameter without identifying the complete shaft connection. 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>N\u1ebfu v\u1eabn c\u00f2n hai c\u1ea5u h\u00ecnh kh\u1ea3 thi, h\u00e3y g\u1eedi c\u1ea3 s\u1ed1 \u0111o v\u00e0 h\u00ecnh \u1ea3nh m\u00e1y m\u00f3c c\u00f9ng v\u1edbi t\u00f9y ch\u1ecdn \u01b0u ti\u00ean. Khi \u0111\u00f3, b\u00e1o gi\u00e1 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh giao di\u1ec7n n\u00e0o v\u1eabn c\u1ea7n x\u00e1c nh\u1eadn thay v\u00ec t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn th\u00e0nh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Chuy\u1ec3n l\u1ef1a ch\u1ecdn k\u1ef9 thu\u1eadt th\u00e0nh m\u1ee5c chi ti\u1ebft s\u1eb5n s\u00e0ng b\u00e1o gi\u00e1.<\/h2>\n<div class=\"htd-data-grid\">\n<article><strong>Danh t\u00ednh<\/strong><\/p>\n<p>N\u00eau r\u00f5 d\u00f2ng s\u1ea3n ph\u1ea9m HTD\/profile v\u00e0 th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 \u0111ai.<\/p>\n<\/article>\n<article><strong>H\u00ecnh h\u1ecdc<\/strong><\/p>\n<p>Cung c\u1ea5p s\u1ed1 r\u0103ng, chi\u1ec1u r\u1ed9ng l\u00e0m vi\u1ec7c v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc ho\u1eb7c b\u1ea3n v\u1ebd li\u00ean quan.<\/p>\n<\/article>\n<article><strong>L\u1eafp \u0111\u1eb7t<\/strong><\/p>\n<p>X\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 ho\u1eb7c b\u1ea1c l\u00f3t, d\u1eef li\u1ec7u tr\u1ee5c, ph\u1ea7n nh\u00f4 ra c\u1ee7a moay\u01a1 v\u00e0 v\u1ecb tr\u00ed \u0111\u01b0\u1eddng \u0111ai n\u1ebfu c\u00f3.<\/p>\n<\/article>\n<article><strong>D\u00f2ng s\u1ea3n ph\u1ea9m th\u01b0\u01a1ng m\u1ea1i<\/strong><\/p>\n<p>Th\u00eam s\u1ed1 l\u01b0\u1ee3ng, \u0111\u1ecba \u0111i\u1ec3m giao h\u00e0ng, c\u00e1c t\u00e0i li\u1ec7u c\u1ea7n thi\u1ebft v\u00e0 phi\u00ean b\u1ea3n b\u1ea3n v\u1ebd \u0111\u00e3 s\u1eed d\u1ee5ng cho y\u00eau c\u1ea7u.<\/p>\n<\/article>\n<\/div>\n<p>Khi m\u1ed9t m\u1ee5c n\u00e0o \u0111\u00f3 \u1edf tr\u00ean th\u1ef1c s\u1ef1 ch\u01b0a \u0111\u01b0\u1ee3c bi\u1ebft, h\u00e3y \u0111\u00e1nh d\u1ea5u n\u00f3 \u0111\u1ec3 x\u00e1c nh\u1eadn. M\u1ed9t c\u00e2u h\u1ecfi m\u1edf ch\u00ednh x\u00e1c s\u1ebd h\u1eefu \u00edch h\u01a1n m\u1ed9t gi\u00e1 tr\u1ecb kh\u1ea3 thi nh\u01b0ng ch\u01b0a t\u1eebng \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng.<\/p>\n<\/section>\n<section>\n<h2>Nh\u1eefng c\u00e2u h\u1ecfi m\u00e0 ng\u01b0\u1eddi mua th\u01b0\u1eddng h\u1ecfi<\/h2>\n<div class=\"htd-faq\">\n<details>\n<summary>\u0110i\u1ec1u g\u00ec c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn tr\u01b0\u1edbc ti\u00ean?<\/summary>\n<p>Confirm shaft diameter, fit requirement, key\/bush method and hub length. That prevents later dimensions from being compared across the wrong product family or installation route.<\/p>\n<\/details>\n<details>\n<summary>Th\u00f4ng tin n\u00e0o h\u1eefu \u00edch nh\u1ea5t cho vi\u1ec7c thay th\u1ebf?<\/summary>\n<p>Send shaft measurement, key or bush details, hub projection, axial datum and drawing, 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>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng h\u00ecnh v\u1ebd?<\/summary>\n<p>H\u00e3y s\u1eed d\u1ee5ng b\u1ea3n v\u1ebd c\u00f3 ki\u1ec3m so\u00e1t b\u1ea5t c\u1ee9 khi n\u00e0o d\u00f2ng trong danh m\u1ee5c kh\u00f4ng m\u00f4 t\u1ea3 \u0111\u1ea7y \u0111\u1ee7 giao di\u1ec7n tr\u1ee5c, b\u1ed1 tr\u00ed moay\u01a1\/m\u1eb7t b\u00edch, \u0111\u1ed9 ho\u00e0n thi\u1ec7n, dung sai ho\u1eb7c y\u00eau c\u1ea7u ki\u1ec3m tra quan tr\u1ecdng \u0111\u1ed1i v\u1edbi m\u00e1y m\u00f3c.<\/p>\n<\/details>\n<\/div>\n<\/section>\n<section>\n<h2>Do Not Separate the Interface Decision From the Exact Model<\/h2>\n<p>Material, bore and taper-bush availability can change with pulley size and construction. Use the material and mounting information stated for the selected row rather than assuming every member of the pitch family can be supplied identically. If the machine needs a feature outside the supported row, move to a drawing-controlled custom review.<\/p>\n<p>A taper-bush maximum bore is a capacity limit for that bush, not the ordered shaft diameter. State the actual shaft size. For straight-bore work, state the required finished interface and any keyway or locking feature explicitly. Hub projection and the belt centerline should remain visible on the drawing because they can decide whether the part installs correctly.<\/p>\n<\/section>\n<section class=\"htd-soft-panel\">\n<h2>Material Requests Need a Functional Reason<\/h2>\n<p>Where several materials appear in the catalogue family, choose from the configurations actually supported. If a special material, coating or treatment is required by the environment or customer standard, state it as a controlled order requirement and discuss the process MOQ. Do not infer material solely from the color of a product photograph.<\/p>\n<p>For inspection, identify what the material choice or interface is expected to control. This makes a material document, dimensional record or other report meaningful to the actual order.<\/p>\n<\/section>\n<section class=\"htd-applied-guide\">\n<h2>The Shaft Interface Should Be Defined After the Pulley Family Is Fixed<\/h2>\n<p>The shaft connection cannot be selected reliably before the belt-side identity is known. Fix the HTD family, tooth count and working width first, then review the bore or taper-bush route, hub length, keyway where applicable and axial location. This sequence prevents a convenient bore choice from steering the project into the wrong pulley family.<\/p>\n<p>For replacements, measure the actual shaft and document shoulders, spacers, retaining features and available withdrawal space. A nominal shaft size does not by itself define the finished fit, keyway or tolerance. When those details are not published in the catalogue row, they belong on the project drawing rather than in a generic product description.<\/p>\n<p>For taper-bush arrangements, keep the exact bush designation tied to the supported pulley row and shaft. For straight-bore custom machining, state the finished interface and inspection requirement explicitly so the purchasing record is reproducible.<\/p>\n<\/section>\n<section class=\"htd-topic-detail\">\n<h2>Do Not Turn a Shaft Measurement Into an Assumed Fit<\/h2>\n<p>A measured shaft diameter identifies the physical shaft but does not automatically define the intended fit, tolerance or keyway. Those controls come from the machine drawing, design intent or an approved replacement specification. Record the measured value as a field measurement and keep it separate from the dimension that will be released for manufacture.<\/p>\n<p>Also record axial locating features: shoulders, spacers, nuts, collars or retaining rings. The bore can be correct while the pulley still sits in the wrong belt plane if the hub or locating stack differs from the original arrangement.<\/p>\n<\/section>\n<section class=\"htd-applied-guide\">\n<h2>Define the Shaft Interface Only After the Belt-Side Geometry Is Fixed<\/h2>\n<p>The shaft connection controls how the pulley locates, transmits torque and maintains its axial position. Before deciding bore, keyway or taper-bush details, confirm the HTD family, tooth count and working width. This prevents a custom shaft feature from being added to the wrong pulley family.<\/p>\n<p>A shaft diameter by itself is not a complete interface definition. Replacement work may also depend on fit, keyway, shoulder position, retaining method, hub projection and available installation space. If any of those features are machine-critical, place them on the controlled drawing rather than relying on a verbal note.<\/p>\n<div class=\"htd-data-grid\">\n<article><strong>Shaft data<\/strong><\/p>\n<p>Record actual shaft diameter and any controlled fit requirement.<\/p>\n<\/article>\n<article><strong>Keyway \/ bush<\/strong><\/p>\n<p>Identify keyway dimensions or the documented taper-bush designation as applicable.<\/p>\n<\/article>\n<article><strong>Axial position<\/strong><\/p>\n<p>Measure hub projection, shoulder location and belt centerline.<\/p>\n<\/article>\n<article><strong>\u0110i\u1ec1u tra<\/strong><\/p>\n<p>Define the datum and acceptance value for any controlled shaft-interface dimension.<\/p>\n<\/article>\n<\/div>\n<p>For obsolete machines, previous repair work may have changed the shaft from the original design. Measure the current interface before ordering a replacement and keep that information with the service record.<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>  Timing Pulley Bore, Shaft Fit and Mounting Guide  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 expl<\/p>","protected":false},"author":1,"featured_media":729,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1646],"tags":[],"class_list":["post-683","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-guides"],"_links":{"self":[{"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/posts\/683","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/comments?post=683"}],"version-history":[{"count":1,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/posts\/683\/revisions"}],"predecessor-version":[{"id":870,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/posts\/683\/revisions\/870"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/media\/729"}],"wp:attachment":[{"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/media?parent=683"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/categories?post=683"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/htdpulley.top\/vi\/wp-json\/wp\/v2\/tags?post=683"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}