{"product_id":"s-series-tc-nbr-double-lip-oil-seal-28mm-id-rotary-shaft","title":"20PC S-Series TC NBR Double Lip Oil Seal 28mm ID – Rotary Shaft Seals","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 oil seal size 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 (thickness). All variants in this listing share a 28mm (approximately 1.10\\u2033) inner diameter. Select the OD and thickness that match your housing bore. When in doubt, consult your equipment manual or contact us to confirm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does TC double lip mean on an oil seal?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"TC stands for a skeleton-reinforced, double-lip design. The primary lip retains oil or grease, while the secondary dust lip blocks contaminants from entering the bearing or shaft area. This dual-barrier construction generally outperforms single-lip seals in dirty or wet environments.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is NBR rubber suitable for outdoor or high-temperature use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NBR (Nitrile Butadiene Rubber) typically handles temperatures from -40\\u00b0F to +212\\u00b0F (-40\\u00b0C to +100\\u00b0C) and resists petroleum-based oils, fuels, and hydraulic fluids. It is generally suitable for outdoor mechanical applications but is not recommended for prolonged exposure to ozone, ketones, or esters. For extreme heat or chemical environments, consider FKM (Viton) seals.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shaft speed and pressure can these seals handle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"TC skeleton oil seals of this type are typically rated for shaft surface speeds up to approximately 4–6 m\/s and low-to-moderate pressure differentials (generally under 0.05 MPa \/ 7 psi). For high-speed or high-pressure applications, verify your specific equipment requirements before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these seals compatible with metric shafts and housings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. All dimensions follow metric standards (mm). The 28mm ID fits standard metric shafts. OD and thickness options range across common metric housing bores. If your equipment uses inch-based dimensions, convert carefully — 28mm is approximately 1.102\\u2033.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why buy a 20-pack instead of individual seals?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Oil seals are wear items that need periodic replacement. A 20-pack ensures you have spares on hand for scheduled maintenance, fleet servicing, or workshop stock — reducing downtime and repeat shipping costs. Each pack contains 20 seals of the same selected size.\"\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. Lightly lubricate the seal lip with the fluid it will retain. Press the seal squarely into the bore 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 keyways or splines during installation.\"\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 NBR Double Lip Oil Seal 28mm ID — Stop Leaks Before They Stop Your Equipment\u003c\/h2\u003e\n    \u003cp\u003eWhen a worn shaft seal lets oil escape into a gearbox housing or allows grit into a pump bearing, the repair bill grows fast. Mechanics, maintenance technicians, and DIY equipment owners who service motors, axles, agricultural machinery, or hydraulic pumps need a reliable stock of correctly sized rotary shaft seals — not a two-week wait for a single replacement.\u003c\/p\u003e\n    \u003cp\u003eThis listing provides a \u003cstrong\u003e20-piece set of S-Series TC skeleton oil seal rings\u003c\/strong\u003e in \u003cstrong\u003eNBR (Nitrile Butadiene Rubber)\u003c\/strong\u003e with a fixed \u003cstrong\u003einner diameter of 28mm (≈1.10\")\u003c\/strong\u003e. Outer diameter and thickness vary by variant, ranging from \u003cstrong\u003e35mm to 52mm OD\u003c\/strong\u003e and \u003cstrong\u003e7mm to 12mm thick\u003c\/strong\u003e — covering a wide spread of metric housing bores. The steel skeleton insert keeps the seal body rigid during press-fit installation, while the NBR compound resists petroleum oils, greases, and common hydraulic fluids.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include \u003cstrong\u003egearbox output shaft sealing\u003c\/strong\u003e, \u003cstrong\u003eelectric motor end-cap seals\u003c\/strong\u003e, \u003cstrong\u003eagricultural equipment axle seals\u003c\/strong\u003e, and \u003cstrong\u003ehydraulic pump shaft seals\u003c\/strong\u003e — anywhere a 28mm rotary shaft passes through a lubricated housing and needs a dependable barrier against leakage and contamination ingress.\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 Note:\u003c\/strong\u003e All variants share a \u003cstrong\u003e28mm inner diameter\u003c\/strong\u003e. Select your variant by matching the \u003cstrong\u003eouter diameter (OD)\u003c\/strong\u003e and \u003cstrong\u003ethickness\u003c\/strong\u003e to your housing bore. Confirm measurements before ordering — see the size guide in the FAQ below.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These TC NBR Double Lip Rotary Shaft Oil 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\u003eTC Double-Lip Design\u003c\/strong\u003e — The primary lip seals in oil or grease while the secondary dust lip blocks dirt, water, and debris from reaching the bearing — a dual-barrier system suited for both clean and contaminated environments.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧲\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSteel Skeleton Reinforcement\u003c\/strong\u003e — An internal metal insert maintains the seal's round shape during press-fit installation and prevents distortion under radial load, ensuring consistent contact with the shaft surface.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛢️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eNBR Compound Fluid Resistance\u003c\/strong\u003e — Nitrile rubber resists petroleum-based oils, mineral greases, diesel fuel, and common hydraulic fluids — making these seals a practical choice for gearbox and pump shaft sealing applications.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e22 Size Options, One Inner Diameter\u003c\/strong\u003e — With OD choices from 35mm to 52mm and thickness from 7mm to 12mm, this listing covers a broad range of metric housing bores for 28mm shafts without needing to source from multiple suppliers.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e20-Piece Workshop Pack\u003c\/strong\u003e — Each order ships 20 identical seals of your chosen size — enough for scheduled fleet maintenance, a full rebuild job, or keeping spares on the shelf to avoid costly downtime on future repairs.\u003c\/span\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🌡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Operating Temperature Range\u003c\/strong\u003e — NBR seals of this type typically perform from -40°F to +212°F (-40°C to +100°C), covering most ambient and under-hood operating conditions found in light industrial and agricultural equipment.\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 \/ Spring-Loaded)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNBR (Nitrile Butadiene 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\u003e28mm (≈1.102\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e35mm – 52mm (≈1.38\" – 2.05\") — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThickness\u003c\/th\u003e\n\u003ctd\u003e7mm – 12mm (≈0.28\" – 0.47\") — 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\u003eFluid Compatibility\u003c\/th\u003e\n\u003ctd\u003ePetroleum oils, mineral greases, diesel, common hydraulic fluids\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003eTypically -40°F to +212°F (-40°C to +100°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax Shaft Speed\u003c\/th\u003e\n\u003ctd\u003eTypically up to 4–6 m\/s surface speed (contact us to confirm for high-speed use)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eGenerally suitable for low-to-moderate pressure (under 0.05 MPa \/ ~7 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e20 pieces (same size)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eS-Series\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor \/ Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eStandards Compliance\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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\u003eSize Tip:\u003c\/strong\u003e Measure your housing bore (OD) and depth (thickness) with calipers before selecting a variant. A seal that is too small in OD will not seal the bore; one that is too thick may not seat fully. When in doubt, \u003cstrong\u003econtact us to confirm\u003c\/strong\u003e compatibility.\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 oil seal size for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eMeasure three dimensions: the \u003cstrong\u003eshaft inner diameter (ID)\u003c\/strong\u003e, the \u003cstrong\u003ehousing bore outer diameter (OD)\u003c\/strong\u003e, and the \u003cstrong\u003ehousing depth (thickness)\u003c\/strong\u003e. All variants in this listing share a \u003cstrong\u003e28mm (≈1.10\") inner diameter\u003c\/strong\u003e. Select the OD and thickness that match your housing bore. For example, if your bore is 42mm wide and 8mm deep, choose the \u003cstrong\u003e28 x 42 x 8 mm\u003c\/strong\u003e variant. When in doubt, consult your equipment 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 on an oil seal?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eTC stands for a skeleton-reinforced, double-lip design. The \u003cstrong\u003eprimary lip\u003c\/strong\u003e retains oil or grease inside the housing, while the \u003cstrong\u003esecondary dust lip\u003c\/strong\u003e blocks contaminants — dirt, water, and debris — from entering the bearing or shaft area. This dual-barrier construction generally outperforms single-lip (SC) seals in dirty or wet operating environments.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs NBR rubber suitable for outdoor or high-temperature use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eNBR (Nitrile Butadiene Rubber) typically handles temperatures from \u003cstrong\u003e-40°F to +212°F (-40°C to +100°C)\u003c\/strong\u003e and resists petroleum-based oils, fuels, and hydraulic fluids. It is generally suitable for outdoor mechanical applications but is not recommended for prolonged exposure to ozone, ketones, or esters. For extreme heat or aggressive chemical environments, consider FKM (Viton) seals instead.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat shaft speed and pressure can these seals handle?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eTC skeleton oil seals of this type are typically rated for shaft surface speeds up to approximately \u003cstrong\u003e4–6 m\/s\u003c\/strong\u003e and low-to-moderate pressure differentials (generally under \u003cstrong\u003e0.05 MPa \/ ~7 psi\u003c\/strong\u003e). For high-speed spindle or high-pressure hydraulic applications, verify your specific equipment requirements and contact us before ordering.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these seals compatible with metric shafts and housings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. All dimensions follow \u003cstrong\u003emetric standards (mm)\u003c\/strong\u003e. The 28mm ID fits standard metric shafts. OD and thickness options span common metric housing bores from 35mm to 52mm. If your equipment uses inch-based dimensions, convert carefully — 28mm is approximately \u003cstrong\u003e1.102\"\u003c\/strong\u003e, and ODs range from approximately \u003cstrong\u003e1.38\" to 2.05\"\u003c\/strong\u003e.\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 wear items that need periodic replacement. A \u003cstrong\u003e20-piece pack\u003c\/strong\u003e ensures you have spares on hand for scheduled maintenance, fleet servicing, or workshop stock — reducing downtime and repeat shipping costs. Each pack contains 20 seals of the same selected size variant.\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 correctly?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eClean the housing bore and shaft. Lightly lubricate the seal lip with the fluid it will retain. Press the seal \u003cstrong\u003esquarely\u003c\/strong\u003e into the bore 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 keyways or splines 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 (I.D × O.D × Thickness)\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":"28 x 35 x 7 mm","offer_id":52334367899922,"sku":"LLGFSHXJZC3862x1","price":18.92,"currency_code":"USD","in_stock":true},{"title":"28 x 35 x 10 mm","offer_id":52334367932690,"sku":"LLGFSHXJZC3863x1","price":20.11,"currency_code":"USD","in_stock":true},{"title":"28 x 37 x 7 mm","offer_id":52334367965458,"sku":"LLGFSHXJZC3864x1","price":18.69,"currency_code":"USD","in_stock":true},{"title":"28 x 38 x 7 mm","offer_id":52334367998226,"sku":"LLGFSHXJZC3865x1","price":16.97,"currency_code":"USD","in_stock":true},{"title":"28 x 38 x 8 mm","offer_id":52334368030994,"sku":"LLGFSHXJZC3866x1","price":17.41,"currency_code":"USD","in_stock":true},{"title":"28 x 38 x 10 mm","offer_id":52334368063762,"sku":"LLGFSHXJZC3867x1","price":21.69,"currency_code":"USD","in_stock":true},{"title":"28 x 40 x 7 mm","offer_id":52334368096530,"sku":"LLGFSHXJZC3868x1","price":19.07,"currency_code":"USD","in_stock":true},{"title":"28 x 40 x 10 mm","offer_id":52334368129298,"sku":"LLGFSHXJZC3869x1","price":21.07,"currency_code":"USD","in_stock":true},{"title":"28 x 42 x 7 mm","offer_id":52334368162066,"sku":"LLGFSHXJZC3870x1","price":19.98,"currency_code":"USD","in_stock":true},{"title":"28 x 42 x 8 mm","offer_id":52334368194834,"sku":"LLGFSHXJZC3871x1","price":20.63,"currency_code":"USD","in_stock":true},{"title":"28 x 42 x 10 mm","offer_id":52334368227602,"sku":"LLGFSHXJZC3872x1","price":22.49,"currency_code":"USD","in_stock":true},{"title":"28 x 43 x 7 mm","offer_id":52334368260370,"sku":"LLGFSHXJZC3873x1","price":23.83,"currency_code":"USD","in_stock":true},{"title":"28 x 44 x 7 mm","offer_id":52334368293138,"sku":"LLGFSHXJZC3874x1","price":24.21,"currency_code":"USD","in_stock":true},{"title":"28 x 45 x 7 mm","offer_id":52334368325906,"sku":"LLGFSHXJZC3875x1","price":22.78,"currency_code":"USD","in_stock":true},{"title":"28 x 45 x 8 mm","offer_id":52334368358674,"sku":"LLGFSHXJZC3876x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"28 x 45 x 10 mm","offer_id":52334368391442,"sku":"LLGFSHXJZC3877x1","price":25.69,"currency_code":"USD","in_stock":true},{"title":"28 x 47 x 7 mm","offer_id":52334368424210,"sku":"LLGFSHXJZC3878x1","price":23.64,"currency_code":"USD","in_stock":true},{"title":"28 x 47 x 8 mm","offer_id":52334368456978,"sku":"LLGFSHXJZC3879x1","price":24.92,"currency_code":"USD","in_stock":true},{"title":"28 x 50 x 10 mm","offer_id":52334368489746,"sku":"LLGFSHXJZC3880x1","price":28.68,"currency_code":"USD","in_stock":true},{"title":"28 x 50 x 12 mm","offer_id":52334368522514,"sku":"LLGFSHXJZC3881x1","price":32.4,"currency_code":"USD","in_stock":true},{"title":"28 x 52 x 8 mm","offer_id":52334368555282,"sku":"LLGFSHXJZC3882x1","price":27.64,"currency_code":"USD","in_stock":true},{"title":"28 x 52 x 10 mm","offer_id":52334368588050,"sku":"LLGFSHXJZC3883x1","price":30.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture6of6_ef42c00c-2b7e-4910-9f02-13780e100ace.jpg?v=1781263834","url":"https:\/\/homediyer.com\/products\/s-series-tc-nbr-double-lip-oil-seal-28mm-id-rotary-shaft","provider":"HomeDIYer","version":"1.0","type":"link"}