{"id":3270,"date":"2026-08-18T17:32:37","date_gmt":"2026-08-18T09:32:37","guid":{"rendered":"https:\/\/jtlcnc.com\/?p=3270"},"modified":"2026-08-18T17:32:38","modified_gmt":"2026-08-18T09:32:38","slug":"how-to-choose-the-appropriate-chamfer-size-to-prevent-chipping-of-granite-platform-edges","status":"publish","type":"post","link":"https:\/\/jtlcnc.com\/ru\/2026\/08\/18\/how-to-choose-the-appropriate-chamfer-size-to-prevent-chipping-of-granite-platform-edges\/","title":{"rendered":"How to choose the appropriate chamfer size to prevent chipping of granite platform edges?"},"content":{"rendered":"

Granite Plate Chamfer Selection to Prevent Edge Chipping<\/h1>\n\n\n\n

Granite is highly brittle, and its edges are stress concentration points, making them extremely prone to chipping during bumping, lifting, handling, and installation. Chamfering is not better the larger it is; it must be selected comprehensively based on plate thickness, precision grade, application scenario, and customer working conditions<\/strong>. It is divided into two main categories: C-type right-angle chamfer and R-type radius chamfer. For 00\/000 grade precision plates, R-type radius chamfers are preferentially recommended as their anti-chipping effect is superior to C-type chamfers.<\/p>\n\n\n\n

I. C-type Right-angle Chamfer (45\u00b0 Chamfer, Most Common)<\/h2>\n\n\n\n

Format: C\u00d7, representing the width of the chamfer’s right-angle edge.<\/p>\n\n\n\n

\u0422\u0430\u0431\u043b\u0438\u0446\u0430<\/p>\n\n\n\n

Plate Thickness<\/th>Recommended Chamfer<\/th>\u0421\u0446\u0435\u043d\u0430\u0440\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/th>Remarks<\/th><\/tr><\/thead>
Thin plates \u2264 100mm<\/td>C3-C5<\/td>Ordinary inspection plates, small marble straightedges<\/td>For thin plates, C5 is not recommended; excessive chamfering will reduce the effective working surface<\/td><\/tr>
Regular thickness 120-200mm<\/td>C5-C8<\/td>Regular 00 grade inspection plates, CMM bases<\/td>C5 is most commonly used for foreign trade shipments, balancing appearance and impact resistance<\/td><\/tr>
Heavy-duty bases > 250mm<\/td>C8-C10<\/td>Heavy-duty, frequent lifting, heavy CMM bases<\/td>Excessive chamfering will reduce the effective measurement surface at the edges<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n

Disadvantage: C-type chamfers still have sharp corner edges. When subjected to lateral impact, the base of the chamfer will still chip. For working conditions with a high risk of bumping, using only C-type chamfers is not recommended.<\/strong><\/p>\n<\/blockquote>\n\n\n\n

II. R-type Radius Chamfer (Best Anti-chipping, Preferred for High-precision Export Plates)<\/h2>\n\n\n\n

The radius chamfer completely eliminates sharp corners, and stress is dispersed by the arc, making it the most effective process for preventing edge chipping.<\/p>\n\n\n\n

\u0422\u0430\u0431\u043b\u0438\u0446\u0430<\/p>\n\n\n\n

Plate Thickness<\/th>Recommended Radius R<\/th>\u0421\u0446\u0435\u043d\u0430\u0440\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/th><\/tr><\/thead>
Within 100mm<\/td>R3~R5<\/td>Small precision plates, marble square and straightedges<\/td><\/tr>
Mainstream thickness 120-200mm<\/td>R5~R8<\/td>00\/000 grade export granite plates, CMM bases (R5\/R6 preferred for foreign trade)<\/td><\/tr>
Heavy-duty thick plates > 250mm<\/td>R8-R10<\/td>Heavy-duty bases, frequent lifting and transfer, overseas sea freight packaging and transport<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u2705 Engineering Experience: For granite plates exported by sea, R5 and above radius chamfers are preferred to significantly reduce the risk of compensation claims for edge chipping during transit.<\/strong><\/p>\n\n\n\n

III. Key Selection Principles (Pitfall Avoidance)<\/h2>\n\n\n\n
    \n
  1. Precision 000-level Platform Precautions<\/strong>
    Do not blindly increase chamfer sizes. Chamfers are non-working surfaces; excessively large chamfers compress the effective measurement working surface. Drawings must clearly state: The effective dimension of the working surface excludes the chamfer.<\/strong><\/li>\n\n\n\n
  2. When is a C-chamfer sufficient?
    For indoor fixed installation, rarely moved or hoisted, internal equipment bases, or on-site protection, C5 can be used; For export, frequent handling, hoisting requirements, or frequent on-site turnover, prioritize R-radius chamfers.<\/strong><\/li>\n\n\n\n
  3. Prohibited Small Chamfers: Not recommended to be smaller than C2\/R2
    Tiny chamfers only remove burrs and do not prevent edge chipping; slight impacts will still cause large-scale chipping.<\/li>\n\n\n\n
  4. Irregular Holes and Slot Corners: All hole openings should have R3-R5 radii; right-angle hole openings are high-risk areas for cracking.<\/li>\n<\/ol>\n\n\n\n

    IV. Quick Selection Guide for Different Working Conditions<\/h2>\n\n\n\n
      \n
    1. Domestic ordinary inspection platforms, fixed workshop placement: C5 45\u00b0 chamfer<\/strong><\/li>\n\n\n\n
    2. 00\/000-level precision, export, sea freight: R5~R6 radius chamfer (preferred)<\/strong><\/li>\n\n\n\n
    3. Heavy-duty bases, frequent hoisting and handling: R8 radius chamfer<\/li>\n\n\n\n
    4. Thin plates (\u2264100mm): Maximum radius should not exceed R5 to prevent material strength reduction<\/li>\n<\/ol>\n\n\n\n

      V. Supplementary Measures (Chamfering alone is insufficient; complete anti-chipping solution)<\/h2>\n\n\n\n
        \n
      1. After chamfering, no hidden cracks should remain on the edges; finished products must be visually inspected with a magnifying glass to ensure the chamfer radius surface is free of micro-cracks;<\/li>\n\n\n\n
      2. Add rubber corner protectors during packaging; even with R-chamfers, violent impacts will still cause chipping;<\/li>\n\n\n\n
      3. During installation and hoisting, do not allow steel wire ropes to directly cradle the edges.<\/li>\n<\/ol>\n\n\n\n
        \"\"<\/figure>","protected":false},"excerpt":{"rendered":"

        Granite Plate Chamfer Selection to Prevent Edge Chipping Granite is highly brittle, and its edges are stress concentration points, making them extremely prone to chipping during bumping, lifting, handling, and installation. Chamfering is not better the larger it is; it must be selected comprehensively based on plate thickness, precision grade, application scenario, and customer working…<\/p>","protected":false},"author":1,"featured_media":3271,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_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-3270","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\/08\/ww-1024x544.png",1024,544,true],"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":362,"filter":"raw","cat_ID":35,"category_count":362,"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\/3270","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=3270"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts\/3270\/revisions"}],"predecessor-version":[{"id":3272,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/posts\/3270\/revisions\/3272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/media\/3271"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/media?parent=3270"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/categories?post=3270"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ru\/wp-json\/wp\/v2\/tags?post=3270"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}