Extremely strict accuracy tolerance: The flatness tolerance is only 1\u20133\u03bcm; even the slightest deformation or scratch will exceed the limit.
Accuracy Lifespan: 20\u201340 years when used properly in a constant-temperature metrology room; in a regular workshop environment, accuracy will degrade and downgrade in 5\u20138 years.
Characteristics: Extremely long physical lifespan, but the accuracy is “delicate”. Slight bumps, temperature fluctuations, and dust friction will directly cause the loss of the original 00\/000 grade accuracy, leaving it to be downgraded and used as Grade 0\/1.<\/li>\n\n\n\n
Tolerance is doubled, and fault tolerance is improved.
Accuracy Lifespan: 15\u201330 years in a dry precision workshop, 10\u201315 years in a regular workshop.
Characteristics: Balances accuracy and durability, making it the most balanced grade for workshops.<\/li>\n\n\n\n
Loose tolerances, insensitive to minor deformations and scratches.
Accuracy Lifespan: 8\u201315 years in a regular machining workshop; can be used stably even with rough handling.
Characteristics: The most durable accuracy lifespan; even with slight surface wear and minor bumps, it still meets the grade requirements.
III. 4 Underlying Reasons Why Accuracy Grade Affects Lifespan<\/li>\n\n\n\n
Grade 000\/00 parts undergo ultra-fine grinding and aging to relieve stress, completely releasing internal stresses in the stone, making the body more stable; however, the surface microstructure is extremely fine. Once subjected to external impact, it is highly prone to invisible internal cracks and micro-deformations, directly scrapping the high precision.
Low-grade parts have greater processing roughness, making their surfaces more resistant to scratches and impacts.<\/li>\n\n\n\n
Grade 000\/00: Must be kept at a constant temperature of 20\u00b12\u00b0C, dust-free, and vibration-free. A temperature difference >5\u00b0C will cause micron-level deformation, and long-term fluctuations will directly accelerate accuracy failure.
Grade 1\/2: Basically unaffected by temperature differences, vibrations, and dust in a regular workshop.
In short: The higher the accuracy, the more demanding the environment. If the environment is substandard, the lifespan is directly cut in half.<\/li>\n\n\n\n
Granite has a high Mohs hardness, but it still experiences micron-level wear:
Grade 00: Wears by 0.1\u20130.3\u03bcm per year, exceeding the tolerance in a few years;
Grade 2: Tolerance is tens of microns; the same amount of wear will not affect the grade for decades.<\/li>\n\n\n\n
After the accuracy of high-precision gauges degrades, they can be used in a downgraded manner: Grade 00 \u2192 Grade 0 \u2192 Grade 1 \u2192 Grade 2, making the overall usage cycle actually longer; low-grade gauges are scrapped directly after degradation.
<\/li>\n<\/ol>\n\n\n\n
IV. Practical conclusions for your ** granite square (precision component with holes) ** Granite Precision Gauges: How Accuracy Grade Directly Determines Service LifeA brief summary of the core logic: The higher the accuracy grade (000 > 00 > 0 > 1 > 2), the stricter the requirements for material, processing, operating environment, and maintenance. The theoretical physical lifespan is longer, but the effective accuracy lifespan is shorter; low-grade…<\/p>","protected":false},"author":1,"featured_media":2799,"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-2798","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_20260512092755_39_25.png",831,787,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\/2798","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=2798"}],"version-history":[{"count":1,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2798\/revisions"}],"predecessor-version":[{"id":2800,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/posts\/2798\/revisions\/2800"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media\/2799"}],"wp:attachment":[{"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/media?parent=2798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/categories?post=2798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jtlcnc.com\/ar\/wp-json\/wp\/v2\/tags?post=2798"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
For CMM, vision measuring machines, and laboratory standards, choose Grade00\/000: Physical lifespan of 30 years, but requires a constant temperature environment, otherwise accuracy will degrade in about 5 years;
For workshop inspection and tooling positioning, choose Grade 0: Best cost-performance ratio and longest accuracy lifespan;
For general scribing and assembly verification, choose Grade 1: Durable and, with the simplest maintenance.
V. A simple one-sentence summary
The higher the grade, the more durable the stone itself, but the shorter the time it maintains high; the lower the grade, the longer it maintains its grade accuracy, but it cannot meet high-end inspection requirements.<\/p>\n\n\n\n![\"\"](\"https:\/\/jtlcnc.com\/wp-content\/uploads\/2026\/05\/\u5fae\u4fe1\u56fe\u7247_20260512092755_39_25.png\")
<\/figure>","protected":false},"excerpt":{"rendered":"