{"id":2128,"date":"2026-09-09T16:24:06","date_gmt":"2026-09-09T08:24:06","guid":{"rendered":"https:\/\/www.jccncmachining.com\/?p=2128"},"modified":"2026-09-07T18:25:48","modified_gmt":"2026-09-07T10:25:48","slug":"the-last-few-microns-precision-grinding-process","status":"publish","type":"post","link":"https:\/\/www.jccncmachining.com\/ko\/blog\/the-last-few-microns-precision-grinding-process\/","title":{"rendered":"The Last Few Microns: Precision Grinding Process"},"content":{"rendered":"<article class=\"blog-post\">\n<p class=\"lead\" style=\"font-size: 20px; line-height: 2em; text-align: left;\">The final few microns of a part can depend more on the <strong>precision grinding process<\/strong> than on the first machining operation. Grinding uses a bonded abrasive wheel to remove small amounts of material while controlling size, form, flatness, and surface condition. It is often selected after turning, milling, or heat treatment when a functional surface needs a controlled finishing route. For the wider manufacturing sequence, see the <a href=\"https:\/\/www.jccncmachining.com\/ko\/%eb%b8%94%eb%a1%9c%ea%b7%b8\/cnc-machining-process\/\" target=\"_blank\" rel=\"noopener\">CNC machining process overview<\/a>.<\/p>\n<nav class=\"table-of-contents\" aria-label=\"Table of Contents\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Table of Contents<\/h2>\n<ul>\n<li><a href=\"#role\">The role of grinding after machining<\/a><\/li>\n<li><a href=\"#methods\">Surface, cylindrical, centerless, and internal grinding<\/a><\/li>\n<li><a href=\"#workflow\">The precision grinding process route<\/a><\/li>\n<li><a href=\"#wheel\">Wheel selection, dressing, and coolant<\/a><\/li>\n<li><a href=\"#burn\">Preventing grinding burn and distortion<\/a><\/li>\n<li><a href=\"#inspection\">Tolerance and inspection<\/a><\/li>\n<li><a href=\"#compare\">Grinding or milling<\/a><\/li>\n<li><a href=\"#faq\">Precision grinding FAQs<\/a><\/li>\n<\/ul>\n<\/nav>\n<section id=\"role\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">The role of grinding after machining<\/h2>\n<p><img decoding=\"async\" width=\"1024\" height=\"576\" loading=\"lazy\" src=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-1024x576.webp\" alt=\"grinding-after-machining\" class=\"size-large wp-image-2171 aligncenter\" \/>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\" srcset=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-1024x576.webp 1024w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-300x169.webp 300w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-768x432.webp 768w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-1536x864.webp 1536w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining-800x450.webp 800w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/02-h2-grinding-after-machining.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>Grinding is a controlled finishing process. An abrasive wheel removes small chips through many cutting points and can refine a flat face, outside diameter, inside diameter, shoulder, raceway, or other surface when function depends on stable size, form, or finish.<\/p>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">It is not automatically the answer for every tight dimension. Grinding adds setup, wheel preparation, coolant control, inspection, and sometimes heat-treatment sequencing. The correct route depends on material, geometry, allowance, tolerance, surface condition, quantity, and the part\u2019s function.<\/p>\n<\/section>\n<section id=\"methods\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Surface, cylindrical, centerless, and internal grinding<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 18px; line-height: 1.6em;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #d9e2ec; padding: 10px;\">Method<\/th>\n<th style=\"border: 1px solid #d9e2ec; padding: 10px;\">Typical feature<\/th>\n<th style=\"border: 1px solid #d9e2ec; padding: 10px;\">Control point<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Surface grinding<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Flat faces and reference surfaces<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Flatness, parallelism, support, and heat<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Cylindrical grinding<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">External diameters, shoulders, and shafts<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Roundness, runout, centers, and diameter<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Centerless or internal grinding<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Round parts, bores, sleeves, and bearing seats<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Feed method, wheel stiffness, access, and coolant<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section id=\"workflow\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">The precision grinding process route<\/h2>\n<p><img decoding=\"async\" width=\"1024\" height=\"576\" loading=\"lazy\" src=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-1024x576.webp\" alt=\"precision-grinding-methods\" class=\"size-large wp-image-2172 aligncenter\" \/>\n<ol style=\"font-size: 20px; line-height: 2em;\" srcset=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-1024x576.webp 1024w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-300x169.webp 300w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-768x432.webp 768w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-1536x864.webp 1536w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods-800x450.webp 800w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/03-h2-precision-grinding-methods.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\n<li><strong>Review function:<\/strong> identify surfaces controlling fit, motion, sealing, alignment, or load.<\/li>\n<li><strong>Confirm pre-ground condition:<\/strong> check material, hardness, heat treatment, allowance, stress, and damage.<\/li>\n<li><strong>Select the method:<\/strong> match surface, cylindrical, centerless, or internal grinding to the feature and volume.<\/li>\n<li><strong>Plan support:<\/strong> define datums, workholding, wheel access, and protection from distortion.<\/li>\n<li><strong>Control removal:<\/strong> choose wheel, dressing, infeed, traverse, coolant, and measurement points.<\/li>\n<\/ol>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">Leaving a consistent allowance is important. Too little stock may leave machining marks; too much increases time and heat. The sequence should account for heat treatment and final inspection.<\/p>\n<\/section>\n<section id=\"wheel\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Wheel selection, dressing, and coolant<\/h2>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">A wheel is a cutting system. Abrasive type, grain size, grade, bond, structure, and geometry influence cutting action, form retention, finish, and heat. Dressing restores the wheel face, exposes fresh abrasive, corrects form, and removes loading. Coolant must reach the wheel-work contact and carry heat and chips away; flooding the machine area is not the same as cooling the contact zone.<\/p>\n<\/section>\n<section id=\"burn\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Preventing grinding burn and distortion<\/h2>\n<p><img decoding=\"async\" width=\"1024\" height=\"576\" loading=\"lazy\" src=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-1024x576.webp\" alt=\"grinding-wheel-dressing\" class=\"size-large wp-image-2173 aligncenter\" \/>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\" srcset=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-1024x576.webp 1024w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-300x169.webp 300w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-768x432.webp 768w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-1536x864.webp 1536w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing-800x450.webp 800w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/04-h2-grinding-wheel-dressing.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>Grinding burn is a thermal problem that can change surface condition even when size looks acceptable. Wheel loading, high infeed, poor dressing, insufficient coolant, a dull wheel, or unstable contact can raise local temperature and create discoloration, residual stress, microstructural change, or cracking.<\/p>\n<ul style=\"font-size: 20px; line-height: 2em;\">\n<li>Keep the wheel sharp and dressed for the material.<\/li>\n<li>Distribute heat through suitable infeed and traverse conditions.<\/li>\n<li>Deliver clean coolant to the actual contact zone.<\/li>\n<li>Support thin parts without creating a false clamping shape.<\/li>\n<li>Measure during production to detect drift early.<\/li>\n<\/ul>\n<\/section>\n<section id=\"inspection\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Tolerance and inspection<\/h2>\n<p><img decoding=\"async\" width=\"1024\" height=\"576\" loading=\"lazy\" src=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-1024x576.webp\" alt=\"grinding-heat-control\" class=\"size-large wp-image-2174 aligncenter\" \/>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\" srcset=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-1024x576.webp 1024w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-300x169.webp 300w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-768x432.webp 768w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-1536x864.webp 1536w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control-800x450.webp 800w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/05-h2-grinding-heat-control.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>A diameter can be within size while roundness or runout is not. A ground face can look smooth while flatness or parallelism fails. Inspection should follow the feature control frame and mating function.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; font-size: 18px; line-height: 1.6em;\">\n<thead>\n<tr>\n<th style=\"border: 1px solid #d9e2ec; padding: 10px;\">Characteristic<\/th>\n<th style=\"border: 1px solid #d9e2ec; padding: 10px;\">Possible evidence<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Size<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Calibrated gauge, micrometer, bore gauge, or CMM<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Form and relationship<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Surface plate, roundness equipment, or datum-based CMM<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Surface condition<\/td>\n<td style=\"border: 1px solid #d9e2ec; padding: 10px;\">Surface tester, visual standard, or burn inspection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">For quality documentation, review the <a href=\"https:\/\/www.jccncmachining.com\/ko\/%ec%a0%95%eb%b3%b4\/quality\/\" target=\"_blank\" rel=\"noopener\">CNC quality information<\/a> and state reports, sampling, and acceptance criteria in the RFQ.<\/p>\n<\/section>\n<section id=\"compare\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Grinding or milling<\/h2>\n<p><img decoding=\"async\" width=\"1024\" height=\"576\" loading=\"lazy\" src=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-1024x576.webp\" alt=\"ground-part-inspection\" class=\"size-large wp-image-2175 aligncenter\" \/>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\" srcset=\"https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-1024x576.webp 1024w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-300x169.webp 300w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-768x432.webp 768w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-1536x864.webp 1536w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection-800x450.webp 800w, https:\/\/www.jccncmachining.com\/wp-content\/uploads\/2026\/09\/06-h2-ground-part-inspection.webp 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>Milling is efficient for bulk stock, pockets, open faces, and complex access. Grinding is more attractive when a selected surface needs stable form, fine finish, or final size after heat treatment. A hybrid route is common: mill or turn close to size, heat-treat when required, then grind the functional surfaces.<\/p>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">Review the <a href=\"https:\/\/www.jccncmachining.com\/ko\/capabilities\/precision-grinding\/\" target=\"_blank\" rel=\"noopener\">precision grinding capability<\/a> with the drawing, material condition, and inspection plan.<\/p>\n<\/section>\n<section id=\"faq\">\n<h2 style=\"font-size: 28px; line-height: 2em;\">Precision grinding FAQs<\/h2>\n<h3 style=\"font-size: 24px; line-height: 2em;\">What is precision grinding used for?<\/h3>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">It refines selected surfaces for size, form, flatness, roundness, alignment, or finish, often after turning, milling, or heat treatment.<\/p>\n<h3 style=\"font-size: 24px; line-height: 2em;\">Does grinding always provide a better finish than milling?<\/h3>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">Not automatically. Finish depends on machine, wheel, material, conditions, support, inspection, and the specified requirement.<\/p>\n<h3 style=\"font-size: 24px; line-height: 2em;\">What causes grinding burn?<\/h3>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">A loaded wheel, excessive infeed, poor dressing, inadequate coolant, unstable support, and concentrated heat are common contributors.<\/p>\n<h3 style=\"font-size: 24px; line-height: 2em;\">What is the difference between surface and cylindrical grinding?<\/h3>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">Surface grinding finishes flat faces, while cylindrical grinding finishes external or internal round features with different workholding and inspection controls.<\/p>\n<\/section>\n<p style=\"font-size: 20px; line-height: 2em; text-align: left;\">A dependable precision grinding process combines a stable pre-ground condition, the right method, a prepared wheel, controlled heat, and inspection tied to function.<\/p>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>The final few microns of a part can depend more on the precision grinding process than on the first machining operation. Grinding uses a bonded abrasive wheel to remove small amounts of material while controlling size, form, flatness, and surface condition. It is often selected after turning, milling, or heat treatment when a functional surface [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2176,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2128","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/posts\/2128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/comments?post=2128"}],"version-history":[{"count":5,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/posts\/2128\/revisions"}],"predecessor-version":[{"id":2193,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/posts\/2128\/revisions\/2193"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/media\/2176"}],"wp:attachment":[{"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/media?parent=2128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/categories?post=2128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/ko\/wp-json\/wp\/v2\/tags?post=2128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}