{"id":24116,"date":"2021-12-01T15:24:40","date_gmt":"2021-12-01T14:24:40","guid":{"rendered":"https:\/\/nh-oring.de\/shore-hardness-o-ring-lexicon\/"},"modified":"2025-05-07T12:32:36","modified_gmt":"2025-05-07T10:32:36","slug":"shore-hardness-o-ring-lexicon","status":"publish","type":"page","link":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/","title":{"rendered":"Shore hardness | O-ring lexicon"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

Shore hardness<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t
\n\t\t\t<\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

#1<\/span> What is Shore hardness?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Shore hardness is the hardness of an O-ring. <\/p>\n

In the field of elastomers (NBR, EPDM, FKM, etc.), the Shore hardness can be between 5 and 100 Shore. However, only the 40 to 90 Shore range is of interest for the manufacture of O-rings. <\/span><\/p>\n

Note:<\/b> The tolerance specification for Shore hardness is \u00b1 5 Shore.<\/span><\/p>\n

Each O-ring material has a standard hardness. We have put together a short table to give you a quick overview of all the important O-ring materials:<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t
\n

Material<\/p><\/th>

Friction<\/p><\/th><\/tr><\/thead>

NBR<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

HNBR<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

EPDM<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

VMQ (silicone)<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

FVMQ<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

FEPM (Aflas)<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

CR (Neoprene)<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

ACM<\/p><\/td>

70 Shore A<\/p><\/td><\/tr>

FKM (Viton)<\/p><\/td>

75 Shore A<\/p><\/td><\/tr>

FFKM (ECOLAST)<\/p><\/td>

75 Shore A<\/p><\/td><\/tr>

FEP coated<\/p><\/td>

90 Shore A<\/p><\/td><\/tr>

PTFE<\/p><\/td>

60 Shore D<\/p><\/td><\/tr><\/tbody><\/table>\n <\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The Shore hardness is specified on every data sheet and is definitely an important key figure. However, it must be noted that the tolerance is \u00b1 5 Shore. It can be deduced from this that the Shore hardness should only be used as a guide value in the design.<\/p>\n

Do I have a high pressure in my system (>50 bar)? <\/b>
-> Then I prefer to use an O-ring with a hardness of 80 or even 90 Shore.<\/p>\n

Are my sealing surfaces uneven and I want to even them out? <\/b>
-> Then I prefer to use 50 or 60 Shore O-rings.<\/span><\/p>\n

Important:<\/b> The Shore hardness is divided into Shore A and Shore D.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

#2<\/span> What is the difference between Shore A and Shore D?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

The measurement of Shore A and Shore D differ and are also intended for different materials.<\/p>

Shore A = elastomers (e.g. FKM 75 Shore A)<\/p>

Shore D = thermosets (e.g. PTFE 60 Shore D)<\/p>

Note:<\/strong> There is no official conversion table from Shore A to Shore D. It is only important to know that 60 Shore D is approximately 100 Shore A. Accordingly, a PTFE O-ring with 60 Shore D is significantly harder than an FKM O-ring with 75 Shore A.<\/p>

Technical article on IRHD and Shore hardness measurement for O-rings | Sealing Academy | Click here >><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Shore hardness #1 What is Shore hardness? Shore hardness is the hardness of an O-ring. In the field of elastomers (NBR, EPDM, FKM, etc.), the Shore hardness can be between 5 and 100 Shore. However, only the 40 to 90 Shore range is of interest for the manufacture of O-rings. Note: The tolerance specification for … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-24116","page","type-page","status-publish"],"yoast_head":"\nShore hardness | Simply explained | O-RING lexicon<\/title>\n<meta name=\"description\" content=\"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Shore hardness | Simply explained | O-RING lexicon\" \/>\n<meta property=\"og:description\" content=\"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/\" \/>\n<meta property=\"og:site_name\" content=\"NH O-RING - Einfacher geht\u00b4s nicht\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/nh.oring\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-07T10:32:36+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/shore-hardness-o-ring-lexicon\\\/\",\"url\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/shore-hardness-o-ring-lexicon\\\/\",\"name\":\"Shore hardness | Simply explained | O-RING lexicon\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#website\"},\"datePublished\":\"2021-12-01T14:24:40+00:00\",\"dateModified\":\"2025-05-07T10:32:36+00:00\",\"description\":\"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/shore-hardness-o-ring-lexicon\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/nh-oring.de\\\/en\\\/shore-hardness-o-ring-lexicon\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/shore-hardness-o-ring-lexicon\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Startseite\",\"item\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/home\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shore hardness | O-ring lexicon\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/\",\"name\":\"NH O-RING - Einfacher geht\u00b4s nicht\",\"description\":\"Einfacher geht\u00b4s nicht\",\"publisher\":{\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#organization\",\"name\":\"NH O-RING\",\"url\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/nh-oring.de\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/NH-Logo-FE5050.png\",\"contentUrl\":\"https:\\\/\\\/nh-oring.de\\\/wp-content\\\/uploads\\\/2021\\\/02\\\/NH-Logo-FE5050.png\",\"width\":300,\"height\":296,\"caption\":\"NH O-RING\"},\"image\":{\"@id\":\"https:\\\/\\\/nh-oring.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/nh.oring\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCpcfPc7x5QysN0h3RKKpplQ\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Shore hardness | Simply explained | O-RING lexicon","description":"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/","og_locale":"en_US","og_type":"article","og_title":"Shore hardness | Simply explained | O-RING lexicon","og_description":"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!","og_url":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/","og_site_name":"NH O-RING - Einfacher geht\u00b4s nicht","article_publisher":"https:\/\/www.facebook.com\/nh.oring","article_modified_time":"2025-05-07T10:32:36+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/","url":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/","name":"Shore hardness | Simply explained | O-RING lexicon","isPartOf":{"@id":"https:\/\/nh-oring.de\/en\/#website"},"datePublished":"2021-12-01T14:24:40+00:00","dateModified":"2025-05-07T10:32:36+00:00","description":"Shore hardness of O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!","breadcrumb":{"@id":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/nh-oring.de\/en\/shore-hardness-o-ring-lexicon\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Startseite","item":"https:\/\/nh-oring.de\/en\/home\/"},{"@type":"ListItem","position":2,"name":"Shore hardness | O-ring lexicon"}]},{"@type":"WebSite","@id":"https:\/\/nh-oring.de\/en\/#website","url":"https:\/\/nh-oring.de\/en\/","name":"NH O-RING - Einfacher geht\u00b4s nicht","description":"Einfacher geht\u00b4s nicht","publisher":{"@id":"https:\/\/nh-oring.de\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/nh-oring.de\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/nh-oring.de\/en\/#organization","name":"NH O-RING","url":"https:\/\/nh-oring.de\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/nh-oring.de\/en\/#\/schema\/logo\/image\/","url":"https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/02\/NH-Logo-FE5050.png","contentUrl":"https:\/\/nh-oring.de\/wp-content\/uploads\/2021\/02\/NH-Logo-FE5050.png","width":300,"height":296,"caption":"NH O-RING"},"image":{"@id":"https:\/\/nh-oring.de\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/nh.oring","https:\/\/www.youtube.com\/channel\/UCpcfPc7x5QysN0h3RKKpplQ"]}]}},"_links":{"self":[{"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/pages\/24116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/comments?post=24116"}],"version-history":[{"count":5,"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/pages\/24116\/revisions"}],"predecessor-version":[{"id":32700,"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/pages\/24116\/revisions\/32700"}],"wp:attachment":[{"href":"https:\/\/nh-oring.de\/en\/wp-json\/wp\/v2\/media?parent=24116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}