Metric TC Oil Seal — Rotary Shaft Seal with Dual Lip (ID 8mm–45mm)

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Metric TC Oil Seal — Rotary Shaft Seal with Dual Lip (ID 8mm–45mm)

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ID×OD×T: 8mm × 22mm × 7mm

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$6.50 USD

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Metric TC Oil Seal — Dual Lip Rotary Shaft Seal for Gearboxes, Pumps & Motors

A leaking shaft seal is one of the most common causes of oil loss in gearboxes, hydraulic pumps, electric motors, and agricultural equipment. Whether you are rebuilding a gearbox, servicing a power take-off unit, or replacing a worn seal on a conveyor drive, finding an exact-fit metric TC oil seal in the right ID × OD × thickness combination is critical to getting the job done right the first time.

Each seal in this listing is a metric TC (TG4-TC-FB) dual-lip rotary shaft seal with a steel outer case and a nitrile rubber (NBR) sealing element. Inner diameters range from 8mm (≈5/16") to 45mm (≈1-3/4"), outer diameters from 20mm (≈13/16") to 75mm (≈2-15/16"), and thicknesses from 5mm (≈3/16") to 12mm (≈15/32"). Select your exact ID × OD × T combination from the variant dropdown above.

These seals are widely used in metric gearbox shaft seal replacement, hydraulic pump rotary shaft sealing, and electric motor bearing housing seals. They are also a direct fit for many European and Asian OEM applications where standard metric TC seals are specified.

ℹ️ Compatibility Note: Always verify all three dimensions — Inner Diameter (ID), Outer Diameter (OD), and Thickness (T) — before ordering. These seals are metric-dimensioned and designed for metric shafts and housings. If you are unsure of your dimensions, contact us to confirm.

✅ Key Features of These Metric TC Oil Seals

🔒Dual-Lip TC Design — The TG4-TC-FB lip arrangement uses a primary sealing lip to retain lubricant and a secondary dust lip to exclude contaminants, providing more reliable sealing than single-lip designs in dirty or wet environments.
⚙️Steel-Reinforced Outer Case — A rigid steel shell ensures the seal presses firmly and squarely into the housing bore, maintaining concentricity and preventing blowout under normal operating conditions.
🧪NBR Sealing Element — Nitrile rubber (NBR) is generally compatible with petroleum-based oils, greases, and water, making these seals suitable for metric gearbox shaft seal replacement across a wide range of industrial and automotive applications.
📐Wide Metric Size Range — With over 250 ID × OD × T combinations available (ID 8–45mm, OD 20–75mm, T 5–12mm), this listing covers a broad spectrum of hydraulic pump rotary shaft sealing and motor bearing housing seal applications in a single place.
🔄Direct OEM Metric Replacement — Dimensioned to standard metric tolerances, these seals are typically a direct drop-in replacement for OEM seals in European and Asian machinery, agricultural equipment, and power transmission units.
🚚Ships from US Warehouse — Stocked and fulfilled domestically for faster delivery to US customers, reducing downtime when you need a replacement seal quickly.

📐 Technical Specifications — Metric TC Rotary Shaft Oil Seal

Seal Type	TC (TG4-TC-FB) — Dual Lip
Lip Configuration	Primary sealing lip (lubricant side) + secondary dust exclusion lip
Outer Case Material	Carbon steel
Sealing Element Material	Nitrile rubber (NBR)
Inner Diameter (ID) Range	8mm (≈5/16") – 45mm (≈1-3/4")
Outer Diameter (OD) Range	20mm (≈13/16") – 75mm (≈2-15/16")
Thickness (T) Range	5mm (≈3/16") – 12mm (≈15/32")
Dimension Standard	Metric (mm)
Typical Operating Temperature	See variant options — generally -40°C to +120°C for NBR
Typical Shaft Speed	See variant options — generally up to 4–6 m/s surface speed
Pressure Rating	Contact us to confirm — designed for low differential pressure
Finish / Color	Black rubber lip, bare steel outer case
Quantity per Order	1 piece per variant selected
Country of Origin	See variant options

⚠️ Size Confirmation Tip: If you are replacing an existing seal, measure the old seal directly or check the housing bore and shaft with calipers. The variant format is ID × OD × T (all in mm). When in doubt, contact us before ordering.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure the shaft diameter (ID), the bore diameter in the housing (OD), and the depth of the seal cavity (T/thickness). Match all three dimensions to the variant listed as ID × OD × T. For example, a 20mm shaft in a 40mm bore with a 7mm cavity depth requires the 20mm × 40mm × 7mm variant — that is approximately 25/32" × 1-37/64" × 9/32". If you are unsure, contact us to confirm before ordering.

What does 'TC' mean in a TC oil seal?

TC refers to the dual-lip (TG4-TC-FB) sealing arrangement. The primary lip retains lubricant and the secondary dust lip faces outward to exclude contaminants. This two-lip design is generally more effective than single-lip (SC) seals in environments with dust, moisture, or light debris — making TC seals the standard choice for most gearbox and pump applications.

What material are these oil seals made from?

These metric TC oil seals typically feature a nitrile rubber (NBR) sealing lip bonded to a steel outer case. NBR is generally compatible with petroleum-based oils, greases, and water. For high-temperature (above ~120°C) or aggressive chemical environments, please contact us to confirm suitability before ordering.

Can these seals be used outdoors or in wet environments?

The secondary dust lip on TC seals provides a degree of protection against water splash and light moisture ingress, making them suitable for many outdoor and wet-area applications such as agricultural equipment, outdoor power tools, and garden machinery. For fully submerged or high-pressure water environments, additional sealing measures are typically recommended.

What shaft speed and pressure can these seals handle?

TC oil seals of this type are generally rated for low-to-moderate shaft speeds and static or low-pressure applications. Typical operating limits are up to approximately 4–6 m/s shaft surface speed and near-zero differential pressure. For high-speed spindles or pressurized sumps, please contact us to confirm the specific variant's rating before ordering.

Are these seals compatible with metric shafts and housings?

Yes. All dimensions listed (ID, OD, and thickness) are in millimeters and follow standard metric sizing. They are designed to fit metric shafts and metric-bored housings. If you are replacing a seal from a European or Asian machine, these will generally match OEM metric specifications. They are not designed for inch-dimensioned (imperial) shafts — always verify your measurements in mm.

How do I install a TC oil seal correctly?

Clean the housing bore and shaft. Lightly lubricate the sealing lip with the fluid being sealed. Press the seal squarely into the bore using a seal driver or a flat block — never hammer directly on the seal face. The primary lip should face toward the lubricant source. Avoid nicking the lip on sharp shaft edges; use a sleeve or tape over keyways and threads during installation.

🛒 Select your ID × OD × T size above, then add to cart — ships from our US warehouse.

Metric TC Oil Seal — Rotary Shaft Seal with Dual Lip (ID 8mm–45mm)

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Metric TC Oil Seal — Dual Lip Rotary Shaft Seal for Gearboxes, Pumps & Motors

✅ Key Features of These Metric TC Oil Seals

📐 Technical Specifications — Metric TC Rotary Shaft Oil Seal

❓ Frequently Asked Questions

Metric TC Oil Seal — Rotary Shaft Seal with Dual Lip (ID 8mm–45mm)

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