Struggling with dust ingress or oil leaks in harsh environments? The TG4 oil seal might be exactly what your equipment needs. This double-lip skeleton oil seal is designed to provide superior sealing performance—especially where durability and contamination resistance are critical.
Unlike ordinary shaft seals, TG4 types combine structure and function to handle high speed, grease retention, and external dirt—making them a favorite in off-road machinery and industrial motors.
In this guide, we’ll explore the TG4 oil seal’s unique structure, compare it with TC type, and help you decide when to use it.
What is a TG4 oil seal?
A TG4 oil seal is a double-lip radial shaft seal with a metal-reinforced skeleton and a rubber-coated outer surface. It features:
- Main sealing lip to retain oil or grease
- Dust lip to block external contamination
- Metal skeleton for rigidity and precise installation
- Rubberized shell for enhanced vibration damping
👉 View product specs here: TG4 Oil Seal – Double Lip
TG4 seals are ideal for gearboxes, motors, reducers, axles, and heavy-duty transmission systems.
How is TG4 different from TC oil seal?
Both TG4 and TC are double-lip rotary seals, but they differ in structure and shell design.
| Feature | TG4 Oil Seal | TC Oil Seal |
|---|---|---|
| Outer shell | Rubber-coated steel case | Full metal shell |
| Vibration isolation | Excellent due to rubber exterior | Moderate |
| Fit | Tighter, more forgiving on surface | Requires smoother bore for sealing |
| Use case | Dusty, vibrating or harsh environments | Clean, high-speed rotating shafts |
👉 Read our full guide: TC Oil Seal: Structure, Specs & Uses
👉 Or explore oil seal types in: Skeleton Oil Seal Guide
What applications suit TG4 seals best?
TG4 seals are built for environments where both oil retention and dust exclusion are necessary.
Common applications:
- Off-road equipment (agriculture, construction)
- Industrial motors and gearboxes
- Fan motors and blowers
- Electric tools with exposed shafts
- Small engines in dusty areas
Their dual-lip design offers longer sealing life than single-lip or open types.
What materials are used in TG4 oil seals?
We manufacture TG4 seals in the following elastomers:
| Material | Temp Range | Chemical Resistance | Use Case |
|---|---|---|---|
| NBR | -40°C to +120°C | Standard oils, fuels | General industrial and automotive |
| FKM | -30°C to +200°C | Solvents, acids, high temp | Harsh environments, heavy machinery |
Need help choosing material?
👉 Compare options in our article: FKM vs NBR: Which Oil Seal Material Should You Choose?
How to install TG4 oil seals correctly?
Installation is similar to other rotary seals, but take care:
- Ensure the rubber coating doesn’t shear during press-in
- Lubricate the lip with oil or grease
- Use a seal driver or press tool for even seating
- Confirm lip direction: oil lip faces in, dust lip faces out
👉 Step-by-step guide: Oil Seal Installation Guide
Improper installation is a common cause of seal failure—never skip prep!
Conclusion
TG4 oil seals offer reliable performance where vibration, dust, or dual-sealing are concerns. With their rubberized outer case and dual lip design, they outperform many traditional shaft seals in real-world conditions.
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Need TG4 oil seals in OEM sizes or want custom branding? Hengoseal offers high-precision TG4 seals in NBR and FKM.
📧 Email: [email protected]
📱 WhatsApp: +86 17622979498
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