4TV-2838N-00
A compound-curve duct has no straight pull direction, so the tool splits on a curve — the most expensive kind of rubber tool to build and the most reliable once it runs.
Specification
| Part number | 4TV-2838N-00 |
|---|---|
| Part family | Moulded rubber part |
| Construction | Single-compound moulding, no metal insert |
| Compound code | EP80 (marked on the part) |
| Face detail | Moulded rubber duct with a compound curve and a moulded collar. |
| Moulding compounds | EPDM, SBR, TPE, TPE-SEBS, PVC or PP, to drawing |
| Tooling | Designed and built in house |
| Prototype parts | 4 weeks from prototype tool |
| PPAP | Typically 8 weeks, to ISO/TS 16949 or VDA |
| Dimensions | Built to customer drawing or to a supplied sample |
| Moulded from | Beijing rubber plant (rubber) / Shanghai plant (plastics) |
The face on this part
Moulded rubber duct with a compound curve and a moulded collar. It sits in the YAMAHA Rubber Parts group, and the photograph above is of the part itself rather than a rendering — what you see is the tread, the outline and the finish as they leave the tool.
One compound, one tool, one shot
The tread, the retaining geometry and any mounting holes or locating tabs are all formed in the tool rather than added afterwards. That is why the tool drawing and the part drawing are effectively the same document, and why a change to the face means a change to the tool.
Compound and hardness
We run EPDM, SBR, TPE, TPE-SEBS, PVC and PP with or without glass reinforcement. Oil or fuel contact rules EPDM out; weather and ozone rule SBR out. Shore A hardness decides how the part feels in use and belongs on the drawing, not in an email.
With no metal face, the compound is the part
There is nothing to hide behind. A pad that is too hard makes its tread pattern useless; one that is too soft wears through at the rib tips. Send the service conditions and our designers will propose a grade rather than asking you to guess one.
Background reading
Choosing a Pedal Pad Compound: EPDM, SBR, TPE and When Each One Fails
Service conditions, not price, should pick the compound. Here is how we narrow it down and what we test to prove the choice.
Reading a Compound Code: What EP70, NBR70 and CI60 Tell You
The codes marked on our YAMAHA parts are a compact statement of family and hardness. Here is how to read one.
Ribs, Lattices, Studs and Slots: What Each Pedal Tread Is For
Four tread families appear across this catalogue. Each one is a different answer to the same question about grip and wear.
Questions buyers ask
What hardness should I specify?
Shore A hardness decides how the part feels and how fast the tread wears. Too hard and the pattern does nothing; too soft and the rib tips go first. Tell us the duty and we will propose a number to put on the drawing.
How long before I see a real 4TV-2838N-00 sample?
Four weeks from a prototype tool. The tool shop is in the same buildings as the moulding lines in Shanghai and Beijing, so prototype work does not queue behind a subcontractor.
What do you need from us to quote it?
A drawing or sample plus the annual volume. Say at that point whether PPAP is required and to which standard — ISO/TS 16949 or VDA — so it is planned in rather than added later.
How is the material verified?
In our Beijing facility, next to the production line: Shore A hardness, density, ozone, ageing, tensile strength, elongation to fracture, vulcanization and insulation resistivity, oil resistance and Mooney viscosity.
What does the EP80 marking on the part mean?
It is the customer's own compound designation, carried on the part so the grade travels with it. The letters give the family — EP for the EPDM grades, NBR for nitrile — and the digits give the nominal Shore A hardness.
Quote the 4TV-2838N-00
Send the annual volume and, if you have one, the drawing. Prototype parts follow 4 weeks after a prototype tool.