Most of us notice the big components—motors, gearboxes, frames. But there’s one small part most people overlook: the rotary shaft seal. In my experience, when these seals fail, everything grinds to a halt. That’s exactly why the TG4 rotary shaft seal was developed—and why it's earned a solid reputation in demanding applications.
So, what makes a TG4 seal different designs?
Let me tell you a story: A client approached us during a system retrofit for a gearbox. Earlier, they'd used classic other seals, but they kept leaking grease after just a few months. We switched them to a TG4 design—a seal with three inner lips, not just one. Today, even after thousands of hours, their gears remain well-lubricated, no dirty mess, and no premature downtime.
The outer lip holds back oil, the middle lip provides backup sealing, and the third lip keeps thrown-on dust and debris at bay. This multi-lip setup gives the TG4 series a distinct edge over single-lip seals, especially in high-heat or high-vibration conditions.
Design details that gained engineer approval
TG4's outer diameter has a micro-waved pattern that ensures a snug fit into the housing bore—even after thermal expansion or slight misalignment.
The seal body combines a steel backbone with a ring spring to ensure the lips stay in firm contact under pressure.
· Lip material: Generally NBR (nitrile rubber), prized for its oil, heat, and wear resistance. Perfect for pumps, autmotive systems, gear reducers, or shock absorbers.
When to use TG4 seals? Let’s get practical:
· Automotive gearboxes: I’ve seen it hold up better than many OEM seals when tuning transmissions.
· Hydraulic/power gear systems: It keeps fluid where it belongs even under high load.
· Industrial pumps and large motors: I personally specified it for a wind
turbine client—they reported a drop in seal-related maintenance by over 50%.
What makes TG4 oil seal a smart investment (from hands-on field use)?
· Full lip seal: Minimizes leakage and contamination simultaneously
· Material durability: Resists abrasive contaminants and surface wear
· Lower maintenance: Lasts longer, fewer shutdowns
· Flexible fit: Wave profile helps overcome slight fit tolerance variations
· Cost in perspective: More upfront cost, but far less total maintenance cost over life cycle
DEDE: We’ve been doing sealing differently
With over 30 years of experience, we’ve seen systems fail and recover. Our TG4 shaft oil seals have outlasted many from big-name suppliers—especially when customized to match the exact shaft shaft, temperature, and pressure specs.
We stock over 10,000 standard seal sizes, and for everything else? We design custom TG4 variants—size, lip hardness, skeleton thickness—everything tailored around your real machine.
Clients in sectors like mining, oil & gas, automotive, and renewable energy have come back with stories of how TG4 seals kept their systems running longer than planned.
In short: why TG4 rotary oil seal can be your go-to seal:
· Proven in harsh conditions
· Excellent for oil retention and dust exclusion
· Built to last—less downtime = lower cost
· Recognized by engineers who want reliability, not just specs
A quick headcount:
· Want sets right away? Check—standard specs on hand, ready to ship.
· Need something unusual? We collaborate with your engineers to get the lip profile, material, and spring tension just right.
· Facing tough working conditions (temperature swings, corrosive lubricants, fine dust)? TG4 rotary shaft seal performs consistently.
TG4 isn't just another seal—it's the kind of seal you lean on when system failure isn't an option. It’s not flashy. But it works. With DEDE, you get more than a part—you get a partner who understands real-world wear, tear, and uptime imperatives.
Let’s talk specifics—your shaft size, operating conditions, equipment design—and I’ll walk you through how TG4 rotary seal can fit in and keep running.
Looking for a custom quote or design reference? Just say the word—we can share drawings, material specs, or tailored examples from past projects.
“We switched to TG4 shaft seal on our turbine drive train. Four years in, still no oil leaks, no dust ingress—and the techs haven't opened that gear housing again.”
That’s the kind of feedback we consistently hear. Want the same reliability in your system? TG4 rotary shaft oil seal can deliver.
