{"id":2655,"date":"2026-05-10T09:44:30","date_gmt":"2026-05-10T01:44:30","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2655"},"modified":"2026-05-10T09:44:48","modified_gmt":"2026-05-10T01:44:48","slug":"what-level-of-machining-accuracy-can-be-achieved-for-precision-granite-machine-parts","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/ar\/2026\/05\/10\/what-level-of-machining-accuracy-can-be-achieved-for-precision-granite-machine-parts\/","title":{"rendered":"What level of machining accuracy can be achieved for precision granite machine parts?"},"content":{"rendered":"

Granite Precision Machined Component Accuracy (Official Standards Industry Real-World Testing)
The machining accuracy of granite precision components can reach up to Grade 000, with flatness \u22640.5\u03bcm\/m and dimensional accuracy \u00b11\u03bcm, classified as ultra-precision grade.<\/p>\n\n\n\n

I. Accuracy Grades (National Standards \/ Industry General)
Grade 000 (Highest)
Flatness: \u22640.5\u03bcm\/m
Applications: CMMs, roundness testers, semiconductor optical bases, ultra-precision inspection platforms<\/p>\n\n\n\n

Grade 00 (High-end Mainstream)
Flatness: \u22641\u03bcm\/m
Applications: Precision inspection platforms, vision instrument bases, machine tool beds<\/p>\n\n\n\n

Grade 0 (Mid-range)
Flatness: \u22642\u03bcm\/m
Applications: General inspection plates, tooling datum tables<\/p>\n\n\n\n

Grade 1 and below (Standard)
Flatness: \u22653\u03bcm\/m
Applications: General layout, assembly datum<\/p>\n\n\n\n

II. Key Precision Indicators (Industry Leading Level)
Flatness: Up to 0.3\u20130.5 \u03bcm\/meter
Straightness: Up to 0.5 \u03bcm\/meter
Parallelism: Up to \u00b11 \u03bcm\/meter
Perpendicularity: Up to \u00b11 \u03bcm\/meter
Dimensional Accuracy: \u00b11 \u03bcm
Surface Roughness: Ra \u2264 0.05 \u03bcm (Mirror finish)<\/p>\n\n\n\n

III. Which Granites Can Achieve the Highest Precision?
Jinan Green: Stable Grade 000 (Top-tier)
Indian Stone (Indian Black Gabbro): Stable at Grade 00 to 000
Zhangqiu Stone \/ Northeast Material: Generally Grade 0 to 00; difficult to stabilize at Grade 000<\/p>\n\n\n\n

\"\"<\/figure>","protected":false},"excerpt":{"rendered":"

Granite Precision Machined Component Accuracy (Official Standards Industry Real-World Testing)The machining accuracy of granite precision components can reach up to Grade 000, with flatness \u22640.5\u03bcm\/m and dimensional accuracy \u00b11\u03bcm, classified as ultra-precision grade. I. Accuracy Grades (National Standards \/ Industry General)Grade 000 (Highest)Flatness: \u22640.5\u03bcm\/mApplications: CMMs, roundness testers, semiconductor optical bases, ultra-precision inspection platforms Grade 00…<\/p>","protected":false},"author":1,"featured_media":2658,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_analysis_target_kw":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[35],"tags":[],"class_list":["post-2655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"taxonomy_info":{"category":[{"value":35,"label":"NEWS"}]},"featured_image_src_large":["https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/05\/\u5fae\u4fe1\u56fe\u7247_20260507172233_33_25.png",838,783,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/ar\/author\/jtlcnc\/"},"comment_info":0,"category_info":[{"term_id":35,"name":"NEWS","slug":"news","term_group":0,"term_taxonomy_id":35,"taxonomy":"category","description":"","parent":0,"count":206,"filter":"raw","cat_ID":35,"category_count":206,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/comments?post=2655"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2655\/revisions"}],"predecessor-version":[{"id":2659,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2655\/revisions\/2659"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media\/2658"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media?parent=2655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/categories?post=2655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/tags?post=2655"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}