{"product_id":"tc-oil-seal-rings-nbr-double-lip-id-8mm-20pcs","title":"20-Pack TC Oil Seal Rings NBR Double Lip Rotary Shaft Seal ID 8mm — Multiple OD \u0026 Heights","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right size TC oil seal for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the shaft inner diameter (ID), the bore outer diameter (OD), and the housing depth (height) with calipers. All seals in this listing share an 8mm ID. Select the OD and height that match your housing bore. When in doubt, consult your equipment service manual or contact us to confirm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does TC double lip mean and why does it matter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"TC-type seals feature two sealing lips: a primary lip that retains lubricant and a secondary dust lip that blocks contaminants from entering the bearing or gearbox. This dual-lip design generally provides better protection than single-lip seals in environments with dirt, moisture, or debris.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What temperature and pressure range can NBR oil seals handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NBR (nitrile rubber) seals typically handle temperatures from approximately -40F to +250F (-40C to +120C) and are suited for low-to-moderate pressure applications. For high-temperature or aggressive chemical environments, consider FKM (Viton) seals instead.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these seals suitable for outdoor or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NBR offers good resistance to water, petroleum-based oils, and mild weather exposure. The secondary dust lip provides added protection, but NBR is generally not recommended for extended UV or ozone exposure. Inspect seals periodically in harsh outdoor conditions.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shaft speed can these TC oil seals handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"TC skeleton oil seals are typically suited for low-to-medium speed rotary shafts found in motors, gearboxes, and small pumps. Acceptable surface speed depends on OD, lip geometry, and lubrication. Contact us if you need to confirm compatibility with high-speed applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why buy a 20-pack instead of individual seals?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Seals are consumable maintenance parts that wear over time. A 20-pack is practical for workshops, fleet maintenance, or anyone servicing multiple machines with 8mm shafts, reducing downtime waiting for a single replacement seal.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these compatible with metric shaft standards?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. All dimensions are metric (mm). The 8mm ID is a standard metric shaft size used widely in motors, gearboxes, and small machinery across ISO and DIN standards. Verify the OD and height match your housing bore before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I install a TC skeleton oil seal correctly?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Clean the housing bore and shaft. Apply a thin film of clean oil to the seal lips and outer diameter. Press the seal in squarely using a seal driver or flat block. The seal face should sit flush with or slightly below the housing surface. Avoid nicking the primary lip on shaft keyways or threads during installation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003ch2\u003eTC Double Lip Oil Seal Rings for 8mm Shafts — Stop Leaks Before They Stop You\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003cp\u003eA leaking rotary shaft seal is one of the most common causes of gearbox oil loss, bearing contamination, and unplanned downtime in motors, pumps, and small machinery. Whether you are a mechanic rebuilding a gearbox, a hobbyist repairing power equipment, or a maintenance tech keeping a production line running, having the right TC oil seal rings on hand is the difference between a 20-minute fix and a full equipment failure.\u003c\/p\u003e\n\u003cp\u003eEach pack contains \u003cstrong\u003e20 TC-series skeleton oil seal rings\u003c\/strong\u003e made from \u003cstrong\u003eNBR (nitrile rubber)\u003c\/strong\u003e with a steel skeleton insert for shape retention. All seals share a fixed \u003cstrong\u003einner diameter (ID) of 8mm (approx. 5\/16\")\u003c\/strong\u003e. Choose from 23 size variants with outer diameters (OD) ranging from \u003cstrong\u003e12mm to 25mm (approx. 15\/32\" to 63\/64\")\u003c\/strong\u003e and heights from \u003cstrong\u003e3mm to 8mm (approx. 1\/8\" to 5\/16\")\u003c\/strong\u003e to match your specific housing bore and depth.\u003c\/p\u003e\n\u003cp\u003eThese double lip rotary shaft seals are well-suited for \u003cstrong\u003eelectric motor shaft sealing\u003c\/strong\u003e, \u003cstrong\u003esmall gearbox oil retention\u003c\/strong\u003e, \u003cstrong\u003ehydraulic pump shaft applications\u003c\/strong\u003e, and general-purpose machinery maintenance where an 8mm shaft bore is present. The TC double lip design makes them a reliable replacement seal for metric equipment across automotive, agricultural, and industrial settings.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard metric 8mm rotary shafts. Select OD and height to match your housing bore. Verify all three dimensions (ID x OD x Height) before ordering.\n\u003c\/div\u003e\n\n\u003ch2\u003e✅ Key Features of These TC Double Lip Oil Seal Rings\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eTC Double Lip Design\u003c\/strong\u003e — Primary lip retains lubricant; secondary dust lip blocks dirt, debris, and moisture from entering the bearing housing — a key advantage over single-lip seals in real-world conditions.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSteel Skeleton Insert\u003c\/strong\u003e — The internal metal skeleton maintains the seal's circular shape under press-fit installation, preventing distortion and ensuring consistent contact with the shaft and bore.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNBR Rubber Compound\u003c\/strong\u003e — Nitrile rubber offers reliable resistance to petroleum-based oils, greases, and hydraulic fluids — the most common lubricants found in motors, gearboxes, and pumps.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e23 Size Options, One Fixed ID\u003c\/strong\u003e — All variants share an 8mm inner diameter; choose from ODs of 12–25mm and heights of 3–8mm to match your exact housing bore dimensions.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDirect Replacement Geometry\u003c\/strong\u003e — TC-series skeleton oil seals follow standard metric sizing conventions, making these a straightforward drop-in replacement for worn seals in ISO\/DIN-dimensioned equipment.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e20-Pack for Workshop Readiness\u003c\/strong\u003e — Seals are consumable maintenance parts. A 20-pack keeps your toolbox stocked for multiple repairs, reducing the risk of downtime waiting for a single replacement seal to ship.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e📐 Technical Specifications — TC Skeleton Oil Seal Rings\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSeal Type\u003c\/th\u003e\n\u003ctd\u003eTC (Double Lip, Skeleton)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNBR (Nitrile Rubber) with steel skeleton insert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003e8mm (approx. 5\/16\") — fixed across all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e12mm – 25mm (approx. 15\/32\" – 63\/64\") — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeight (Width)\u003c\/th\u003e\n\u003ctd\u003e3mm – 8mm (approx. 1\/8\" – 5\/16\") — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLip Configuration\u003c\/th\u003e\n\u003ctd\u003eDual lip: primary sealing lip + secondary dust exclusion lip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Temperature Range\u003c\/th\u003e\n\u003ctd\u003e-40°F to +250°F (-40°C to +120°C) — typical for NBR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFluid Compatibility\u003c\/th\u003e\n\u003ctd\u003ePetroleum-based oils, greases, hydraulic fluids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication Type\u003c\/th\u003e\n\u003ctd\u003eRotary shaft sealing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimension Standard\u003c\/th\u003e\n\u003ctd\u003eMetric (mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e20 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Speed Suitability\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm for high-speed applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n\u003cstrong\u003eBefore ordering:\u003c\/strong\u003e Measure your shaft ID, housing bore OD, and housing depth with calipers. A seal that is even 0.5mm off in OD will not seat correctly. When in doubt, contact us to confirm fitment.\n\u003c\/div\u003e\n\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size TC oil seal for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure three dimensions with calipers: the shaft \u003cstrong\u003einner diameter (ID)\u003c\/strong\u003e, the housing bore \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e, and the housing \u003cstrong\u003edepth (height)\u003c\/strong\u003e. All seals in this listing have an 8mm ID. Select the OD and height variant that matches your housing. For example, if your bore is 16mm wide and 5mm deep, choose the \u003cstrong\u003e8 x 16 x 5 mm\u003c\/strong\u003e variant. When in doubt, consult your equipment service manual or contact us to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat does TC double lip mean and why does it matter?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eTC-type seals feature two sealing lips: a \u003cstrong\u003eprimary lip\u003c\/strong\u003e that retains lubricant inside the housing, and a \u003cstrong\u003esecondary dust lip\u003c\/strong\u003e that blocks contaminants — dirt, water, and debris — from entering. This dual-lip design generally provides better protection than single-lip (SC-type) seals in environments where external contamination is a concern, such as outdoor equipment or dusty workshops.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat temperature and pressure range can these NBR oil seals handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNBR (nitrile rubber) seals typically handle temperatures from approximately \u003cstrong\u003e-40°F to +250°F (-40°C to +120°C)\u003c\/strong\u003e. They are suited for low-to-moderate pressure rotary shaft applications. For high-temperature environments above 250°F or exposure to aggressive chemicals like ketones or strong acids, consider FKM (Viton) seals instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these seals suitable for outdoor or wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNBR offers good resistance to water, petroleum-based oils, and mild weather exposure. The secondary dust lip on TC-type seals adds a layer of protection against moisture ingress. In most cases, these seals perform well in outdoor power equipment such as lawn mowers, tillers, and generators, but inspect them periodically in harsh or saltwater environments as NBR is generally not recommended for prolonged UV or ozone exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat shaft speed can these TC oil seals handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eTC skeleton oil seals are designed for rotary shaft applications. Acceptable surface speed depends on the specific OD, lip geometry, lubrication, and shaft finish. In most cases, these seals are suitable for the low-to-medium shaft speeds found in \u003cstrong\u003eelectric motors, small gearboxes, and pumps\u003c\/strong\u003e. If your application involves high-speed shafts, contact us to confirm compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with metric shaft and housing standards?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. All dimensions are in metric (mm). The 8mm ID is a standard metric shaft size used widely in motors, gearboxes, and small machinery conforming to ISO and DIN standards. Verify that the OD and height match your specific housing bore before ordering — metric sizing is not interchangeable with imperial equivalents without careful conversion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhy buy a 20-pack instead of individual seals?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eOil seals are consumable maintenance parts — they wear over time and should be replaced during routine service intervals. A 20-pack is practical for \u003cstrong\u003eworkshops, fleet maintenance operations, or anyone servicing multiple machines\u003c\/strong\u003e with 8mm shafts. Having spares on hand eliminates downtime waiting for a single replacement seal to arrive when a machine needs immediate repair.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I install a TC skeleton oil seal correctly?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eClean the housing bore and shaft thoroughly before installation. Apply a thin film of clean oil or grease to the seal lips and the outer diameter. Press the seal in squarely using a seal driver or a flat block — never tap one side only, as this can distort the steel skeleton. The seal face should sit flush with or slightly below the housing surface. Avoid nicking the primary lip on shaft keyways or threads during installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your \u003cstrong\u003esize (ID x OD x Height)\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\n\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"8 x 12 x 3 mm","offer_id":52335146205458,"sku":"LLGFSHXJZC4062x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 13 x 5 mm","offer_id":52335146238226,"sku":"LLGFSHXJZC4063x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 14 x 4 mm","offer_id":52335146270994,"sku":"LLGFSHXJZC4064x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 14 x 5 mm","offer_id":52335146303762,"sku":"LLGFSHXJZC4065x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 15 x 4 mm","offer_id":52335146336530,"sku":"LLGFSHXJZC4066x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 15 x 5 mm","offer_id":52335146369298,"sku":"LLGFSHXJZC4067x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 15 x 6 mm","offer_id":52335146402066,"sku":"LLGFSHXJZC4068x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 15 x 8 mm","offer_id":52335146434834,"sku":"LLGFSHXJZC4069x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 16 x 4 mm","offer_id":52335146467602,"sku":"LLGFSHXJZC4070x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 16 x 5 mm","offer_id":52335146500370,"sku":"LLGFSHXJZC4071x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 16 x 6 mm","offer_id":52335146533138,"sku":"LLGFSHXJZC4072x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 16 x 7 mm","offer_id":52335146565906,"sku":"LLGFSHXJZC4073x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 18 x 4 mm","offer_id":52335146598674,"sku":"LLGFSHXJZC4074x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 18 x 5 mm","offer_id":52335146631442,"sku":"LLGFSHXJZC4075x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 18 x 7 mm","offer_id":52335146664210,"sku":"LLGFSHXJZC4076x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"8 x 18 x 8 mm","offer_id":52335146696978,"sku":"LLGFSHXJZC4077x1","price":48.14,"currency_code":"USD","in_stock":true},{"title":"8 x 19 x 7 mm","offer_id":52335146729746,"sku":"LLGFSHXJZC4078x1","price":48.14,"currency_code":"USD","in_stock":true},{"title":"8 x 20 x 7 mm","offer_id":52335146762514,"sku":"LLGFSHXJZC4079x1","price":48.91,"currency_code":"USD","in_stock":true},{"title":"8 x 22 x 5 mm","offer_id":52335146795282,"sku":"LLGFSHXJZC4080x1","price":48.36,"currency_code":"USD","in_stock":true},{"title":"8 x 22 x 6 mm","offer_id":52335146828050,"sku":"LLGFSHXJZC4081x1","price":49.45,"currency_code":"USD","in_stock":true},{"title":"8 x 22 x 7 mm","offer_id":52335146860818,"sku":"LLGFSHXJZC4082x1","price":50.54,"currency_code":"USD","in_stock":true},{"title":"8 x 22 x 8 mm","offer_id":52335146893586,"sku":"LLGFSHXJZC4083x1","price":51.41,"currency_code":"USD","in_stock":true},{"title":"8 x 25 x 7 mm","offer_id":52335146926354,"sku":"LLGFSHXJZC4084x1","price":52.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_e0a6e9ce-b18d-4ea5-85fb-dc911ebcc260.jpg?v=1781612318","url":"https:\/\/homediyer.com\/products\/tc-oil-seal-rings-nbr-double-lip-id-8mm-20pcs","provider":"HomeDIYer","version":"1.0","type":"link"}