What is the difference between 1 PCS and 2 PCS packing options?

The packing quantity option lets you choose how many seals you receive per order line. Select 1 PCS if you need a single replacement seal, or 2 PCS if you want a spare on hand or are sealing both ends of a shaft. Pricing reflects the quantity selected.

TC Skeleton Oil Seal NBR Double Lip Rotary Shaft Seal — ID 20mm 21mm 22mm

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TC Skeleton Oil Seal NBR Double Lip Rotary Shaft Seal — ID 20mm 21mm 22mm

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Sizes (ID x OD x Thickness): 20 x 25 x 5mm

Packing QTY (Piece): 2 PCS

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$2.58 USD

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Verfügbar (500 Stück), versandbereit

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TC Skeleton Oil Seal with NBR Double Lip — Stop Leaks on Rotary Shafts (ID 20–22mm)

A leaking shaft seal is one of the most frustrating maintenance headaches — oil drips, contamination builds up, and bearings fail prematurely. Whether you are rebuilding a gearbox, servicing agricultural equipment, or replacing a worn seal on a pump or motor, finding the exact TC skeleton oil seal in the right size should not require a trip to a specialty supplier. This listing covers a wide range of inner diameters from 20mm to 22mm with dozens of OD and thickness combinations, so you can match your exact housing dimensions without compromise.

Each seal features a steel skeleton (TC-type) inner frame for dimensional stability, an NBR (Nitrile Butadiene Rubber) sealing body, and a double-lip design — a primary sealing lip that retains oil and a secondary dust-exclusion lip that keeps contaminants out. Sizes span ID 20mm–22mm (≈0.787\u2033–0.866\u2033), with outer diameters ranging from 25mm to 60mm and thicknesses from 4mm to 16mm. Available in 1 PCS or 2 PCS packing quantities.

These TC rotary shaft seals are well suited for gearbox output shafts, hydraulic cylinder rods, agricultural machinery axles, small engine crankshafts, and industrial pump housings — anywhere a reliable metric oil seal for rotating shafts is needed to prevent lubricant loss and exclude dust or moisture.

ℹ️ Compatibility Note: These seals use metric dimensions (mm). Before ordering, measure your shaft OD (= seal ID), housing bore ID (= seal OD), and housing depth (= seal thickness). All three must match. See the FAQ below for a sizing guide.

✅ Key Features of These TC Skeleton NBR Double Lip Oil Seals

🔩Steel Skeleton (TC-Type) Frame — The rigid inner ring maintains the seal's round shape under press-fit installation and prevents distortion in the housing bore, ensuring consistent contact around the full shaft circumference.
🛡️Double-Lip NBR Design — The primary lip retains lubricant; the secondary lip acts as a dust and moisture exclusion barrier. This dual-action design extends service life in dirty or wet environments compared to single-lip seals.
🌡️NBR Compound for Oil Resistance — Nitrile rubber is generally compatible with petroleum-based oils, greases, and hydraulic fluids, and typically handles temperatures from approximately -40°F to +250°F (-40°C to +120°C).
📐Wide Size Selection for Metric Shafts — With ID options at 20mm, 21mm, and 22mm and OD choices from 25mm to 60mm, this listing covers a broad range of metric rotary shaft seal applications without needing custom orders.
⚙️Designed for Rotary Shaft Applications — The TC profile and lip geometry are optimized for rotating shafts in gearboxes, pumps, motors, and agricultural equipment, where dynamic sealing under continuous rotation is required.
📦Flexible Packing Quantities — Choose 1 PCS for a single replacement or 2 PCS to keep a spare on hand. Ideal for both one-time repairs and planned maintenance stock.

📐 Technical Specifications — TC Skeleton NBR Double Lip Oil Seal

Seal Type	TC (Double Lip with Dust Exclusion Lip)
Inner Diameter (ID)	20mm (≈0.787\u2033), 21mm (≈0.827\u2033), 22mm (≈0.866\u2033)
Outer Diameter (OD)	25mm–60mm (see variant options)
Thickness	4mm–16mm (see variant options)
Sealing Material	NBR (Nitrile Butadiene Rubber)
Frame / Skeleton	Steel (TC-type)
Lip Configuration	Double lip — primary oil retention + secondary dust exclusion
Operating Temperature	Typically -40°F to +250°F (-40°C to +120°C)
Compatible Fluids	Petroleum-based oils, greases, hydraulic fluids (not for brake fluid or ketones)
Dimension Standard	Metric (mm)
Packing Options	1 PCS or 2 PCS per order line
Application	Gearboxes, pumps, motors, agricultural machinery, small engines
Country of Origin	See variant options

⚠️ Sizing Tip: If your shaft or housing dimensions fall between listed sizes, do not round up — an oversized seal will not seal properly. Contact us to confirm the closest available match.

❓ Frequently Asked Questions

How do I choose the right size TC oil seal?

Measure three dimensions: the shaft outer diameter (this becomes the seal ID), the housing bore inner diameter (this becomes the seal OD), and the housing depth (this becomes the seal thickness). Match all three to the variant you select. For example, a 20 x 35 x 7mm seal fits a 20mm (≈0.787\u2033) shaft, a 35mm (≈1.378\u2033) housing bore, and requires at least 7mm (≈0.276\u2033) of housing depth. When in doubt, use exact measured values rather than rounding.

What does NBR mean and how does it affect performance?

NBR stands for Nitrile Butadiene Rubber. It is generally resistant to petroleum-based oils, greases, and hydraulic fluids, and typically performs well in temperatures from approximately -40°F to +250°F (-40°C to +120°C). It is not recommended for use with brake fluid, ketones, or strong acids. For high-temperature or aggressive chemical environments, a Viton (FKM) seal may be more appropriate.

Can these TC oil seals be used outdoors or in wet environments?

The double-lip design provides an additional dust and moisture exclusion lip, making these seals generally suitable for moderately wet or dusty outdoor environments — such as agricultural equipment or outdoor power tools. For fully submerged or high-pressure water jet applications, contact us to confirm suitability before ordering.

What shaft speed can these rotary shaft seals handle?

TC-type skeleton oil seals are designed for rotary shaft applications. Acceptable surface speed depends on shaft finish, lubrication, and operating temperature. In most cases, a well-lubricated shaft with a surface finish of Ra 0.2–0.8 µm is recommended for optimal lip life. Contact us for guidance on high-speed applications before purchasing.

Are these seals compatible with metric shafts and housings?

Yes. All dimensions listed (ID x OD x Thickness) follow metric standards in millimeters. These seals are designed for metric shafts and housings. If you are working with inch-based equipment, convert your measurements first — for example, 20mm ≈ 0.787\u2033, 21mm ≈ 0.827\u2033, 22mm ≈ 0.866\u2033.

What is the difference between the 1 PCS and 2 PCS packing options?

The packing quantity option lets you choose how many seals you receive per order line. Select 1 PCS for a single replacement seal, or 2 PCS if you want a spare on hand or need to seal both ends of a shaft. Pricing reflects the quantity selected — the per-unit cost is the same.

How do I install a TC skeleton oil seal correctly?

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the fluid it will be retaining. Press the seal squarely into the housing bore using a seal driver or a flat wooden block — never strike the seal face directly with a hammer. Ensure the seal sits flush or slightly below the housing face. Take care not to nick or fold the lip during installation, as this will cause immediate leakage.

🛒 Select your size (ID x OD x Thickness) and quantity above, then add to cart — ships from our US warehouse.

TC Skeleton Oil Seal NBR Double Lip Rotary Shaft Seal — ID 20mm 21mm 22mm

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Beschreibung

TC Skeleton Oil Seal with NBR Double Lip — Stop Leaks on Rotary Shafts (ID 20–22mm)

✅ Key Features of These TC Skeleton NBR Double Lip Oil Seals

📐 Technical Specifications — TC Skeleton NBR Double Lip Oil Seal

❓ Frequently Asked Questions

TC Skeleton Oil Seal NBR Double Lip Rotary Shaft Seal — ID 20mm 21mm 22mm

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