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

NBR nitrile rubber generally offers good resistance to water, petroleum-based oils, and mild weather exposure. However, NBR is not recommended for prolonged UV exposure or contact with ozone, ketones, or esters. For heavy outdoor or chemical exposure, a Viton (FKM) seal is typically more appropriate.

TC Double Lip Oil Seal NBR 70 — ID 17mm Rotary Shaft Seal, Multiple OD & Heights

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TC Double Lip Oil Seal NBR 70 — ID 17mm Rotary Shaft Seal, Multiple OD & Heights

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Size(ID x OD x Height): 17*27*7mm

Amout(pcs): 1 Pcs

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TC Double Lip Oil Seal NBR 70 — Stop Shaft Leaks with a Reliable Rotary Seal (ID 17mm)

If you are dealing with grease or oil weeping past a rotating shaft on a gearbox, axle, pump, or small engine, a worn or missing shaft seal is almost always the culprit. Mechanics, equipment rebuilders, and DIY repair enthusiasts who work on metric machinery need a seal that installs cleanly, holds under rotation, and does not require sourcing from an OEM parts counter.

Each seal in this listing is a TC-type double lip skeleton oil seal made from NBR 70 Shore A nitrile rubber with a steel reinforcing ring. The inner diameter is fixed at 17mm (approx. 11/16"); outer diameter and height vary by variant, ranging from 27mm to 45mm OD and 5mm to 10mm height (approximately 1-1/16" to 1-3/4" OD, 3/16" to 3/8" height). Available in packs of 1, 2, 5, or 20 pieces to suit single repairs or workshop stock.

Typical use cases include gearbox output shaft sealing, small engine crankshaft oil seal replacement, agricultural equipment bearing housings, electric motor shaft seals, and light industrial rotary shaft applications where a metric TC double lip NBR seal is specified.

🔵 Compatibility Note: These seals fit shafts with a 17mm outer diameter. Select the OD and height variant that matches your housing bore and depth. Dimensions follow standard metric TC oil seal sizing and are interchangeable with any TC-type seal of the same ID x OD x Height.

✅ Key Features of These TC Double Lip NBR Oil Seals

🛡️Dual-Lip Sealing Design — The TC profile combines a primary lubricant-retention lip with a secondary dust-exclusion lip, providing two barriers against contamination ingress on rotating shafts.
⚙️Steel-Reinforced Skeleton Body — An internal metal ring maintains the seal shape during press-fit installation and prevents distortion under radial load, ensuring consistent contact with the shaft.
🧪NBR 70 Shore A Nitrile Rubber — Nitrile compound resists petroleum-based oils, greases, and mineral hydraulic fluids across a wide temperature range, making it the standard choice for gearbox and crankshaft oil seal replacement.
📐10 Size Options, One Fixed ID — All variants share a 17mm inner diameter; choose from OD sizes of 27, 30, 35, 40, or 45mm and heights of 5, 7, 8, or 10mm to match your specific housing bore without modification.
📦Flexible Pack Quantities — Order 1, 2, 5, or 20 pieces per size, useful for single-unit repairs, keeping a spare on hand, or stocking a workshop with rotary shaft seal inventory.
🔄Direct Metric Replacement — Dimensioned to standard metric TC oil seal specifications, these seals are a direct drop-in replacement for worn seals of the same ID x OD x Height from any manufacturer.

📐 Technical Specifications — TC Double Lip Rotary Shaft Oil Seal

Seal Type	TC (Double Lip, Skeleton / FB Type)
Inner Diameter (ID)	17mm (approx. 11/16")
Outer Diameter (OD)	27 / 30 / 35 / 40 / 45mm — see variant options
Height (Width)	5 / 7 / 8 / 10mm — see variant options
Material	NBR (Nitrile Butadiene Rubber), 70 Shore A
Reinforcement	Steel skeleton ring (metal-cased)
Lip Configuration	Double lip — primary sealing lip + secondary dust lip
Operating Temperature	Typically -40°F to +212°F (-40°C to +100°C)
Compatible Fluids	Petroleum-based mineral oils, greases, mineral hydraulic fluids
Shaft Speed	Typically up to approx. 4 m/s (13 ft/s) — contact us to confirm
Pressure Rating	Low-pressure / static sealing (typically 0.3 bar / 4.4 psi max)
Installation Method	Press-fit into housing bore
Pack Quantity	1 / 2 / 5 / 20 pcs — see variant options
Country of Origin	Contact us to confirm

⚠️ Before ordering: Measure your shaft OD (= seal ID), housing bore ID (= seal OD), and housing depth (= seal height) with calipers. Confirm all three dimensions match your application before purchasing.

❓ Frequently Asked Questions

How do I choose the right size TC oil seal for my application?

Measure three dimensions with calipers: (1) the shaft outer diameter — this must equal the seal ID (17mm / approx. 11/16" for all variants in this listing); (2) the housing bore inner diameter — this must equal the seal OD; (3) the housing depth — this must equal or be slightly greater than the seal height. For example, a 17x30x7mm seal fits a 17mm shaft, a 30mm (approx. 1-3/16") bore, and a housing at least 7mm (approx. 9/32") deep.

What does TC double lip mean and why does it matter?

TC (also called TC-FB or skeleton type) describes a seal with two sealing lips: a primary lip that retains lubricant inside the housing, and a secondary dust lip that blocks dirt, water, and debris from entering. This dual-barrier design generally outperforms single-lip seals in applications exposed to contamination, making it the standard choice for gearbox and crankshaft oil seal replacement.

What is the pressure rating of these rotary shaft seals?

TC-type oil seals are designed for low-pressure dynamic sealing. They are typically rated for static pressures up to approximately 0.3 bar (approx. 4.4 psi). They are not suitable for high-pressure hydraulic circuits. If your application involves elevated pressure, contact us to confirm suitability before ordering.

Can these seals be used outdoors or in wet environments?

NBR nitrile rubber generally offers good resistance to water, petroleum oils, and mild weather exposure. However, NBR is not recommended for prolonged UV exposure, ozone-rich environments, or contact with ketones, esters, or chlorinated solvents. For heavy outdoor or chemical exposure, a Viton (FKM) seal is typically more appropriate. The secondary dust lip on TC seals does provide additional protection against moisture ingress.

What shaft speed and temperature range are these seals rated for?

NBR 70 Shore A seals are generally suitable for operating temperatures from approximately -40°F to +212°F (-40°C to +100°C) and shaft surface speeds up to around 4 m/s (approx. 13 ft/s). Actual performance depends on shaft surface finish, lubrication condition, and radial load. Contact us to confirm for your specific application.

Are these seals compatible with standard metric shaft and bore dimensions?

Yes. All dimensions follow standard metric TC oil seal sizing. The 17mm ID fits a 17mm shaft. These seals are interchangeable with any TC-type metric oil seal of the same ID x OD x Height from any manufacturer — no modification required. They are commonly used as replacements in European and Asian metric machinery.

What lubricants are compatible with NBR 70 oil seals?

NBR 70 is compatible with most petroleum-based mineral oils, greases, mineral hydraulic fluids, and water-glycol mixtures. It is generally not compatible with synthetic esters, phosphate esters, aromatic hydrocarbons, or chlorinated solvents. Always verify fluid compatibility with your specific lubricant before installation.

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TC Double Lip Oil Seal NBR 70 — ID 17mm Rotary Shaft Seal, Multiple OD & Heights

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Beschreibung

TC Double Lip Oil Seal NBR 70 — Stop Shaft Leaks with a Reliable Rotary Seal (ID 17mm)

✅ Key Features of These TC Double Lip NBR Oil Seals

📐 Technical Specifications — TC Double Lip Rotary Shaft Oil Seal

❓ Frequently Asked Questions

TC Double Lip Oil Seal NBR 70 — ID 17mm Rotary Shaft Seal, Multiple OD & Heights

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