Inspecting perpendicularity and parallelism between machine tool columns, guide rails, and worktables (e.g., lathes, milling machines, machining centers).
Calibrating the mutual perpendicularity of X\/Y\/Z axes during the installation and commissioning of CNC machine tools and Coordinate Measuring Machines (CMM).
Verifying the right-angle relationship between the machine bed, spindle, and guide rails during machine tool overhauls or precision restoration.<\/li>\n\n\n\n
Right-angle reference calibration for precision tooling, fixtures, and inspection gauges.
Perpendicularity inspection for mold (injection \/ stamping) templates and guide pin \/ guide bushing installation.
Perpendicular and parallel reference for the assembly of precision parts (e.g., semiconductor \/ optical components).<\/li>\n\n\n\n
Serving as a 90\u00b0 reference gauge to calibrate metal squares, dial indicators, micrometers, optical instruments, etc.
Value transfer and precision comparison of perpendicularity and parallelism in laboratories \/ quality inspection departments.
High-precision measurement reference in constant-temperature environments, replacing metal gauges susceptible to temperature effects.<\/li>\n\n\n\n
Precision assembly and form and position tolerance inspection of aerospace structural parts and engine components.
Horizontal and vertical reference calibration for semiconductor equipment, medical instruments, and optical platforms.
III. Accuracy Grades and Selection
Grade 000 (Reference Grade): Metrology rooms \/ laboratories, used for value transfer and high-precision calibration.
Grade 00 (High Precision): Precision machining \/ quality inspection, machine tool and CMM installation and calibration.
Grade 0 (Industrial Grade): On-site workshop inspection, equipment installation and commissioning.
IV. Usage and Maintenance Key Points
Handle with care to avoid bumps; keep the working surface clean and avoid scratches.
Apply anti-rust oil when not in use for a long time, and store in a dry, constant-temperature environment.
Regularly (recommended annually) send to a metrology institution for calibration to ensure reliable accuracy.<\/li>\n<\/ol>\n\n\n\n
![\"\"](\"https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/06\/20260615-082946.png\")
<\/figure>","protected":false},"excerpt":{"rendered":"L'\u00e9querre de pr\u00e9cision en granit est un \u00e9talon de mesure g\u00e9om\u00e9trique de haute pr\u00e9cision, principalement utilis\u00e9 pour le contr\u00f4le et l'\u00e9talonnage de la perpendicularit\u00e9, du parall\u00e9lisme et de la plan\u00e9it\u00e9. Elle est largement utilis\u00e9e dans des domaines tels que la fabrication de machines, l'assemblage de pr\u00e9cision, l'\u00e9talonnage m\u00e9trologique et l'a\u00e9rospatiale. I. Caract\u00e9ristiques principales (Pourquoi le granit ?) Grande stabilit\u00e9 : le vieillissement naturel et la lib\u00e9ration des contraintes internes garantissent une performance \u00e0 long terme sans d\u00e9formation ; faible coefficient\u2026<\/p>","protected":false},"author":1,"featured_media":2937,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_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-2936","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\/06\/20260615-082946.png",499,500,false],"author_info":{"display_name":"jinxing6611@gmail.com","author_link":"https:\/\/jtlcnc.com\/fr\/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":426,"filter":"raw","cat_ID":35,"category_count":426,"category_description":"","cat_name":"NEWS","category_nicename":"news","category_parent":0}],"tag_info":false,"_links":{"self":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2936","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/comments?post=2936"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2936\/revisions"}],"predecessor-version":[{"id":2938,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/posts\/2936\/revisions\/2938"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media\/2937"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/media?parent=2936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/categories?post=2936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/fr\/wp-json\/wp\/v2\/tags?post=2936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}