TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring
Zum Zoomen über das Bild scrollen Klicke zum Zoomen auf das Bild
TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal RingTC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring

TC Skeleton Oil Seal ID 72–78mm | NBR 70 Dual Lip Rotary Shaft Seal Ring

HomeDIYer
Keine Bewertungen

By HomeDIYer®

Preis:
$2.82 USD
Lagerbestand:
Verfügbar (500 Stück), versandbereit

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact Diners Club Discover Google Pay iDEAL Wero Mastercard PayPal Shop Pay USDC Visa

Deine Zahlungsinformationen werden sicher verarbeitet. Wir speichern keine Kreditkartendaten und haben auch keinen Zugang zu deinen Kreditkartendaten.

Quantity Discount Promotion
🎯 BULK DISCOUNT: Buy More, Save More!
Buy 2 Items
5% OFF
Buy 4 Items
10% OFF
Buy 6 Items
15% OFF
✅ Auto-discount • 🔄 Mix & match
Expert

DIY Expert Support

Get fitment advice & recommendations

Mon-Fri, 8:30AM-8PM
WhatsApp WhatsApp Email
⚡
24-Hour Fast Ship
🚚
Arrives in 3-14 days
🌍
Global Reach
↩️
30-Day Returns
🌱 1 tree planted with every purchase

Beschreibung

TC Skeleton Oil Seals ID 72–78mm — Stop Leaks at the Source

Mechanics, equipment rebuilders, and plant maintenance teams know the frustration of a weeping shaft seal: oil drips on the floor, bearings run dry, and downtime adds up fast. These TC skeleton oil seals with an inner diameter range of 72–78mm are engineered to create a reliable, long-lasting barrier between rotating shafts and their housings — keeping lubricant in and contaminants out.

Each seal is a TC (dual-lip) design constructed with an NBR 70 (nitrile rubber, 70 Shore A hardness) elastomer bonded to a rigid steel skeleton. Available in a wide matrix of sizes — inner diameters of 72mm (≈2.83"), 73mm (≈2.87"), 74mm (≈2.91"), 75mm (≈2.95"), and 78mm (≈3.07"); outer diameters from 85mm (≈3.35") to 160mm (≈6.30"); and thicknesses from 7mm (≈0.28") to 14mm (≈0.55") — these seals cover a broad range of shaft and housing combinations. Sold individually (1 PCS) or in value packs (5 PCS).

Typical applications include industrial gearbox output shafts, hydraulic pump drive ends, electric motor shaft extensions, agricultural equipment axles, and light-duty automotive differential pinion shafts. Whether you are rebuilding a gearbox in a manufacturing plant or servicing a tractor PTO, these rotary shaft seal rings deliver dependable performance where it counts.

🔵 Compatibility Note: These seals fit shafts with an outer diameter of 72, 73, 74, 75, or 78mm. Confirm your housing bore (OD) and groove depth (thickness) before ordering. If your shaft has a keyway or spline, use a sleeve or wear ring to protect the seal lip during installation.

✅ Key Features of These TC Skeleton Oil Seals

  • 🔒Dual-Lip TC Design — The primary sealing lip retains lubricant while the secondary dust lip blocks dirt, moisture, and abrasive particles from reaching the bearing cavity, extending bearing service life in contaminated environments.
  • 🧲Rigid Steel Skeleton — An internal metal case maintains the seal's circular shape under press-fit installation and resists distortion from housing bore tolerances, ensuring consistent radial lip contact force around the full circumference.
  • 🛢️NBR 70 Elastomer — Nitrile rubber at 70 Shore A hardness provides reliable resistance to mineral oils, petroleum greases, and water — the most common lubricants found in gearboxes, pumps, and motors across industrial and agricultural applications.
  • 📐Wide Size Matrix — With inner diameters from 72–78mm and outer diameters up to 160mm, this listing covers over 100 distinct size combinations, reducing the need to source seals from multiple suppliers for a single rebuild job.
  • ⚙️Garter Spring-Loaded Lip — A coiled garter spring behind the primary lip maintains consistent radial load on the shaft surface as the lip wears over time, helping sustain sealing effectiveness throughout the seal's service life.
  • 📦Flexible Pack Quantities — Order a single seal (1 PCS) for a one-off repair or choose the 5-pack for workshop stock, fleet maintenance, or multi-unit rebuilds — both options ship from our US warehouse.

📐 Technical Specifications — TC Rotary Shaft Oil Seal

Seal Type TC (Double Lip / Dual Contact)
Inner Diameter (ID) 72mm (≈2.83"), 73mm (≈2.87"), 74mm (≈2.91"), 75mm (≈2.95"), 78mm (≈3.07")
Outer Diameter (OD) 85mm (≈3.35") – 160mm (≈6.30"); see variant options
Thickness 7mm (≈0.28") – 14mm (≈0.55"); see variant options
Elastomer Material NBR (Nitrile Butadiene Rubber)
Hardness 70 Shore A
Internal Structure Steel skeleton (metal case)
Spring Garter spring (coil spring behind primary lip)
Operating Temperature Typically −40°C to +120°C (−40°F to +248°F) for NBR
Max Shaft Speed Typically up to 4–8 m/s depending on size and lubrication
Max Pressure Typically ≤ 0.05 MPa (≈7 psi) differential
Recommended Shaft Finish Ra 0.2–0.8 µm (8–32 µin); hardness ≥ HRC 45 recommended
Compatible Lubricants Mineral oils, petroleum greases, PAO synthetics (not ester-based or silicone oils)
Pack Quantity 1 PCS or 5 PCS (see variant options)
Installation Method Press-fit into housing bore
⚠️ Size Confirmation: With over 100 size combinations available, please double-check your ID × OD × Thickness measurements before adding to cart. If you are unsure of your seal dimensions, contact us with your equipment make/model and we will help identify the correct size.

❓ Frequently Asked Questions

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

Measure three dimensions: (1) your shaft's outer diameter — this is the seal's ID; (2) the bore diameter in the housing — this is the seal's OD; (3) the groove or housing depth — this is the seal's thickness. For example, a 75mm shaft in a 100mm bore with a 10mm groove needs a 75×100×10mm seal. Always verify all three dimensions before ordering. If converting from inches: 1 inch = 25.4mm, so a 3" shaft ≈ 76.2mm — the closest standard size in this listing would typically be 75mm or 78mm.

What does 'TC' mean in TC oil seal?

'TC' refers to the seal's dual-lip (double-contact) design. The primary lip retains lubricant and excludes contaminants, while the secondary dust lip provides an additional barrier against dirt and moisture ingress. TC seals are generally more effective than single-lip (SC) seals in environments where external contamination is a concern.

What is the pressure rating of these oil seals?

TC skeleton oil seals are designed for low-pressure dynamic sealing — typically up to 0.05 MPa (≈7 psi) of differential pressure. They are not intended for high-pressure hydraulic circuits. For higher-pressure applications, a dedicated hydraulic lip seal or a pressurized seal design should be used instead.

Can these seals be used outdoors or in wet environments?

NBR (nitrile rubber) generally offers good resistance to water, oils, and mild chemicals, making these seals suitable for outdoor and wet environments in most cases. However, NBR is not recommended for prolonged exposure to ozone, UV radiation, or aromatic/chlorinated solvents. For extreme outdoor or chemical exposure, FKM (Viton) alternatives are worth considering.

What shaft surface finish and speed are compatible with these seals?

For optimal sealing life, the shaft contact surface should typically have a finish of Ra 0.2–0.8 µm (8–32 µin) and a hardness of HRC 45 or higher to minimize lip wear. These TC seals are generally rated for shaft speeds up to approximately 4–8 m/s, depending on the specific size and lubrication conditions. Consult us to confirm for your specific application.

Are these seals compatible with synthetic oils and greases?

NBR 70 is generally compatible with mineral oils, petroleum-based greases, and PAO (polyalphaolefin) synthetic oils. It is not recommended for ester-based synthetic oils, phosphate ester hydraulic fluids, or silicone oils, as these can cause NBR to swell or degrade over time. When in doubt, contact us to confirm compatibility with your specific lubricant.

How do I install a TC skeleton oil seal correctly?

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the same oil or grease used in the application. Press the seal squarely into the bore using a seal driver or flat plate — never hammer directly on the seal face. The seal should sit flush with or slightly below the housing face. Protect the seal lip from shaft keyways or splines during installation by using a sleeve or tape.

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

You may also like

Recently viewed