{"product_id":"tc-oil-seal-double-lipped-rotary-shaft-seal-silicone","title":"TC Oil Seal – Double Lipped Rotary Shaft Seal | Silicone Dust Seal","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 TC oil seal size?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the shaft diameter (inner diameter), the bore diameter (outer diameter), and the housing depth (width\/height) of your application. TC oil seals are typically labeled as ID × OD × Width — for example, 20 × 40 × 7 mm (≈0.79\\\" × 1.57\\\" × 0.28\\\"). Always measure in millimeters for accuracy and cross-reference with your equipment manual when possible.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does the double lip design do?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The double lip (TC type) design features a primary sealing lip that retains lubricant and a secondary dust lip that blocks contaminants from entering the housing. This dual-barrier construction generally provides better protection than single-lip seals in dirty or wet environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these seals handle high temperatures?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Silicone TC oil seals typically withstand continuous operating temperatures from approximately -65°F to +400°F (-54°C to +204°C), making them suitable for most automotive, industrial, and outdoor power equipment applications. For extreme heat beyond this range, contact us to confirm suitability.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these seals suitable for outdoor or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Silicone is inherently resistant to moisture, ozone, and UV exposure. TC oil seals with a double lip are generally well-suited for outdoor power equipment, marine auxiliary applications, and agricultural machinery where water and debris ingress are common concerns.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shaft and bore standards are these compatible with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"TC oil seals follow metric dimensional standards (ISO 6194 \/ DIN 3760) and are compatible with metric shafts. They are commonly used in applications with shaft diameters ranging from approximately 6 mm to 200 mm. For inch-standard shafts, verify the exact OD and ID dimensions match your housing bore before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I install a TC oil seal correctly?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Clean the housing bore and shaft thoroughly before installation. Lightly lubricate the seal lip with the fluid it will be sealing. Press the seal in squarely using a seal driver or a flat block — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing surface. Avoid nicking the lip on sharp shaft edges; use a chamfer or installation sleeve when available.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What fluids are silicone TC oil seals compatible with?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Silicone seals are generally compatible with petroleum-based oils, gear oils, ATF, water, and many synthetic lubricants. They are not recommended for use with certain brake fluids (DOT 3\/4) or concentrated ketone-based solvents. If your application uses an unusual fluid, contact us to confirm compatibility.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eTC Oil Seal — Double Lipped Rotary Shaft Seal That Keeps Leaks and Contamination Out\u003c\/h2\u003e\n    \u003cp\u003eWhen a worn or undersized shaft seal lets oil weep past a rotating shaft, the mess is only half the problem — contaminated bearings and seized components follow quickly. Mechanics, equipment owners, and DIY rebuilders who need a dependable rotary shaft seal that handles both fluid retention and dust exclusion in one unit reach for the TC-type double lip oil seal.\u003c\/p\u003e\n    \u003cp\u003eEach seal ships as an individual unit and is constructed from silicone elastomer bonded to a steel case. The TC (double lip) profile includes a primary sealing lip that retains lubricant and a secondary dust exclusion lip. Sizes are available in multiple metric dimensions — inner diameter (ID), outer diameter (OD), and width are all listed in the variant selector above; dimensions follow the standard ID × OD × Width format in millimeters with inch equivalents noted where applicable (e.g., 20mm × 40mm × 7mm ≈ 0.79\" × 1.57\" × 0.28\").\u003c\/p\u003e\n    \u003cp\u003eThese rotary shaft seals are used across a wide range of applications: automotive gearbox and differential rebuilds where oil retention is critical, outdoor power equipment such as lawn tractors and tillers that operate in dusty and wet conditions, and light industrial machinery with rotating shafts that require a reliable metric oil seal replacement. The silicone lip material also makes them a practical choice as a high-temperature shaft seal in engines and pumps that run hot.\u003c\/p\u003e\n    \u003cdiv class=\"hdiy-note\"\u003e\n      \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n      \u003cstrong\u003eConfirm your dimensions before ordering.\u003c\/strong\u003e Measure shaft OD (= seal ID), housing bore ID (= seal OD), and housing depth (= seal width) in millimeters. Select the matching variant above.\n    \u003c\/div\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 metric rotary shafts following ISO 6194 \/ DIN 3760 standards. Commonly used in automotive differentials, gearboxes, pumps, outdoor power equipment, and light industrial machinery. Verify ID × OD × Width dimensions match your application before purchase.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These TC Double Lipped Rotary Shaft Seals\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔒\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eDual-Barrier Sealing\u003c\/strong\u003e — The TC double lip design combines a primary oil-retention lip with a secondary dust exclusion lip, providing two independent sealing barriers in a single rotary shaft seal.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSilicone Elastomer Construction\u003c\/strong\u003e — Silicone lip material maintains flexibility across a wide temperature range, making this a reliable high-temperature shaft seal for engines, pumps, and outdoor equipment that cycle between cold starts and sustained heat.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSteel-Reinforced Case\u003c\/strong\u003e — A rigid steel outer case ensures the seal presses squarely into the housing bore and holds its shape under press-fit installation, reducing the risk of distortion during assembly.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eOil and Moisture Resistance\u003c\/strong\u003e — Silicone resists petroleum-based oils, gear lubricants, ATF, and water, making these seals suitable for wet and outdoor environments where a standard rubber seal would degrade faster.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMetric Dimensional Standard\u003c\/strong\u003e — Sized to ISO 6194 \/ DIN 3760 metric dimensions, these double lip oil seals serve as direct replacements for OEM seals in metric-standard gearboxes, differentials, and rotating shaft assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBroad Application Range\u003c\/strong\u003e — From automotive differential seal replacements to agricultural equipment and small engine rebuilds, the TC profile covers a wide range of rotating shaft diameters typically from 6 mm to 200 mm.\u003c\/span\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — TC Double Lip Oil Seal\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 \/ Dual Lip)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLip Material\u003c\/th\u003e\n\u003ctd\u003eSilicone (VMQ)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCase Material\u003c\/th\u003e\n\u003ctd\u003eCarbon steel (metal-cased)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDimensional Standard\u003c\/th\u003e\n\u003ctd\u003eISO 6194 \/ DIN 3760 (metric)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (ID)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWidth \/ Height\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically −65°F to +400°F (−54°C to +204°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Speed\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm for your application\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCompatible Fluids\u003c\/th\u003e\n\u003ctd\u003ePetroleum oils, gear oil, ATF, water, many synthetic lubricants\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right TC oil seal size?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure three dimensions on your application: the shaft outer diameter (this becomes the seal's ID), the housing bore inner diameter (this becomes the seal's OD), and the housing depth (this becomes the seal's width). TC oil seals are typically labeled ID × OD × Width in millimeters — for example, 20 × 40 × 7 mm (≈0.79\" × 1.57\" × 0.28\"). Always measure in millimeters for accuracy and cross-reference with your equipment service manual when available.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does the double lip design do compared to a single lip seal?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThe TC double lip design adds a secondary dust exclusion lip behind the primary oil-retention lip. The primary lip retains lubricant inside the housing; the secondary lip blocks dirt, dust, and moisture from entering from the outside. In most cases, this dual-barrier construction outperforms single-lip seals in environments with airborne debris, mud, or water splash.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan these seals handle high operating temperatures?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eSilicone (VMQ) TC oil seals typically withstand continuous operating temperatures from approximately −65°F to +400°F (−54°C to +204°C). This range generally covers automotive engines, gearboxes, and outdoor power equipment. For applications with sustained temperatures above this range, contact us to confirm suitability before ordering.\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\u003eYes. Silicone is inherently resistant to moisture, ozone, and UV exposure. TC oil seals with a double lip are generally well-suited for outdoor power equipment, agricultural machinery, and marine auxiliary applications where water ingress and airborne debris are ongoing concerns. The secondary dust lip provides an additional barrier against water splash.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat shaft and bore standards are these compatible with?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese TC oil seals follow metric dimensional standards (ISO 6194 \/ DIN 3760) and are designed for metric rotary shafts. They are commonly used with shaft diameters ranging from approximately 6 mm to 200 mm. If your equipment uses inch-standard shafts, verify that the exact OD and ID dimensions in millimeters match your housing bore before ordering — the physical dimensions are what matter, not the nominal designation.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I install a TC oil seal without damaging the lip?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eClean the housing bore and shaft thoroughly before installation. Lightly lubricate the seal lip with the fluid it will be retaining. Press the seal in squarely using a seal driver or a flat wooden block — never strike the seal face directly with a hammer. The seal should sit flush or slightly below the housing surface. If the shaft has a sharp edge or keyway, use a chamfer or a thin installation sleeve to protect the lip during assembly.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat fluids are silicone TC oil seals compatible with?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eSilicone seals are generally compatible with petroleum-based engine oils, gear oils, automatic transmission fluid (ATF), water, and many synthetic lubricants. They are not recommended for use with concentrated DOT 3\/4 brake fluid or ketone-based solvents. If your application uses an unusual or aggressive fluid, contact us to confirm compatibility before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I know if I need a TC seal or a different seal type?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eTC (double lip) seals are the most common choice for rotating shaft applications where both oil retention and dust exclusion are needed. If your application only requires oil retention with no external contamination risk, a single-lip (SC or SB type) seal may suffice. If you are unsure which type your equipment originally used, check the service manual or contact us with your equipment make, model, and shaft dimensions.\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 size above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Default Title","offer_id":52333703004434,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_11ba1106-9293-445f-bdab-2d7bcb387ea8.jpg?v=1780941582","url":"https:\/\/homediyer.com\/products\/tc-oil-seal-double-lipped-rotary-shaft-seal-silicone","provider":"HomeDIYer","version":"1.0","type":"link"}