{"id":2845,"date":"2026-05-31T10:50:12","date_gmt":"2026-05-31T02:50:12","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=2845"},"modified":"2026-05-31T10:50:13","modified_gmt":"2026-05-31T02:50:13","slug":"what-level-of-machining-accuracy-can-the-granite-base-of-a-five-axis-ultra-precision-machine-tool-achieve","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/ru\/2026\/05\/31\/what-level-of-machining-accuracy-can-the-granite-base-of-a-five-axis-ultra-precision-machine-tool-achieve\/","title":{"rendered":"\u041a\u0430\u043a\u043e\u0433\u043e \u0443\u0440\u043e\u0432\u043d\u044f \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043c\u043e\u0436\u0435\u0442 \u0434\u043e\u0441\u0442\u0438\u0447\u044c \u0433\u0440\u0430\u043d\u0438\u0442\u043d\u043e\u0435 \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u044f\u0442\u0438\u043e\u0441\u0435\u0432\u043e\u0433\u043e \u0441\u0432\u0435\u0440\u0445\u0442\u043e\u0447\u043d\u043e\u0433\u043e \u0441\u0442\u0430\u043d\u043a\u0430?"},"content":{"rendered":"

Combining industry general standards, machining processes, and the operational requirements of five-axis ultra-precision machine tools, accuracy levels are divided into three major categories: basic geometric accuracy, form and position tolerances, and surface quality. These levels further distinguish indicators for rough machining, precision machining, and ultra-precision grinding stages, while marking conventional industry thresholds.<\/p>\n\n\n\n

Machining Accuracy Levels for Granite Bases of Five-Axis Ultra-Precision Machine Tools<\/p>\n\n\n\n

I. Flatness (Core reference planes, guide rail \/ workbench mounting surfaces)
Conventional Precision Grade (General five-axis machine tools)
Overall surface: 0.01 mm\/m, cumulative error of the entire plate \u2264 0.03 mm
Ultra-Precision Grade (Mainstream five-axis ultra-precision machines)
Overall surface: 2\u20135 \u03bcm\/m, cumulative error of the entire plate \u2264 0.01 mm
Nano \/ Sub-micron Grade (Specialized machines for semiconductors and optics)
Overall surface: 0.5\u20131 \u03bcm\/m, single reference plane error < 0.002 mm<\/p>\n\n\n\n

II. Straightness, Parallelism, Perpendicularity (Key tolerances for guide rail installation)
Straightness: 1\u20133 \u03bcm\/m
Relative parallelism: \u2264 2 \u03bcm\/m
Perpendicularity of adjacent surfaces: \u2264 3 \u03bcm\/m
For large-span (over 2m) components, the full-stroke form and position tolerance is controlled within 5 \u03bcm.<\/p>\n\n\n\n

III. Dimensional Accuracy (Outlines, mounting holes, steps)
Outline dimensions: Tolerance \u00b10.01 to \u00b10.02 mm
Precision mounting holes (steel sleeves, guide rail fixing holes): Hole diameter tolerance H7\/H8 (tolerance range at the micron level), hole position tolerance \u2264 0.01 mm
Positioning steps, rebates: Dimensional tolerance \u00b10.005 mm<\/p>\n\n\n\n

IV. Surface Roughness
Precision ground surfaces: Ra 0.2\u20130.4 \u03bcm
Ultra-precision ground \/ polished reference surfaces: Ra \u2264 0.02 \u03bcm (mirror grade, suitable for ultra-high precision guide rail fitting)<\/p>\n\n\n\n

V. Leveling and Assembly Reference Accuracy (After complete machine assembly)
After base leveling on the floor, overall machine levelness: \u2264 0.02 mm\/m;
After installing the vibration isolation system, dynamic fluctuation of the reference surface under operating conditions < 1 \u03bcm.<\/p>\n\n\n\n

VI. Supplement: Long-term Accuracy Retention After Aging
After multi-stage natural aging artificial stress relief treatment:
Normal temperature and conventional working conditions: Annual accuracy drift \u2264 1 \u03bcm
Constant temperature cleanroom (\u00b10.5\u00b0C): Geometric accuracy decay over 3\u20135 years does not exceed 2 \u03bcm<\/p>\n\n\n\n

VII. Accuracy Grading Quick View (For reporting \/ selection)
\u0422\u0430\u0431\u043b\u0438\u0446\u0430
Equipment Positioning | Flatness | Form and Position Tolerance (per meter) | Application Scenarios
General five-axis machine tools | 10 \u03bcm\/m | 5\u20138 \u03bcm\/m | General machinery, ordinary molds
Precision five-axis ultra-precision machines | 2\u20135 \u03bcm\/m | 2\u20133 \u03bcm\/m | 3C, medical, general precision molds
Ultra-high precision five-axis (semiconductor \/ optics) | 0.5\u20131 \u03bcm\/m | < 2 \u03bcm\/m | Optical components, ceramic substrates, wafer components.<\/p>\n\n\n\n

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

Combining industry general standards, machining processes, and the operational requirements of five-axis ultra-precision machine tools, accuracy levels are divided into three major categories: basic geometric accuracy, form and position tolerances, and surface quality. These levels further distinguish indicators for rough machining, precision machining, and ultra-precision grinding stages, while marking conventional industry thresholds. Machining Accuracy Levels…<\/p>","protected":false},"author":1,"featured_media":2846,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_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-2845","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\/20260530-163113.png",400,300,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/ru\/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":220,"filter":"raw","cat_ID":35,"category_count":220,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts\/2845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/comments?post=2845"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts\/2845\/revisions"}],"predecessor-version":[{"id":2847,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts\/2845\/revisions\/2847"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/media\/2846"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/media?parent=2845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/categories?post=2845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/tags?post=2845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}