Vulcanized rubber line
Buyer names NBR, FKM, silicone or EPDM. Factory confirms Shore A and the ASTM method if used to distinguish grade.
polyurethane vs rubber bushings
Use this sheet when the line is polyurethane vs rubber bushings. Neighbouring nylon sleeve wording is a different request. Rubber Bushing Sourcing does not reprint a Shore A table, a compression-set figure, or an ASTM D2000 callout as its own number.
Which polyurethane vs rubber bushings lines belong on the sheet
Vulcanized rubber, cast polyurethane, and a thermoplastic elastomer swap are different goods even when the envelope looks the same. Write the path the receiving plant will accept. This is a buyer choice, not a sustainability claim by this desk.
Polyurethane line
Cast or molded PU. Shore A or Shore D must be written; the two scales are not interchangeable.
TPE / TPU substitute
Only when the duty allows a thermoplastic. Cycle-time benefit is the factory’s, not a site promise.
Drawing-based path
ID/OD or a drawing the factory can quote. Do not fold a leftover lot into a new-mold line without rewriting the request.
Files that travel with the lot
These short names are asks. They are not badges this desk earned. A plant ISO 9001 letter does not replace a lot test.
REACH
SVHC statement on the quoted compound if the duty requires it.
RoHS
Only when the receiving plant files electrical-adjacent goods.
FDA 21 CFR 177
Only when the buyer named a food-contact duty.
ISO 9001
Supplier system file; not a substitute for the dimensional page.
IATF 16949
Automotive plants only, and only if they ask.
ASTM D2000
Method and condition on the quoted configuration.
Mandatory versus optional entries
Compound and the applicable ASTM or equivalent standard are mandatory once a factory is asked to quote. They are optional only while the buyer is still choosing between rubber and polyurethane.
| Field | Unit or pairing | Mandatory or optional | Supplier must confirm in writing |
|---|---|---|---|
| Inquiry form | Rubber compound, polyurethane, TPE swap or drawing-based | Mandatory | Quoted mold maps to that form |
| Inner and outer diameter | Inches or millimetres together, or standard size reference | Mandatory | Measured size and tolerance method |
| Shore hardness | Shore A or Shore D, not mixed | Mandatory | Value for the quoted compound |
| Quantity and destination | Count with unit; US state or postal code | Mandatory | Lot quantity, sample split, Incoterms |
| Compound and ASTM method | Named family and method condition | Mandatory on the quote; optional while still choosing form | Report that cites that method |
| Service temperature | °F or °C from the site | Mandatory if heat or cold is named | Factory window for the quoted compound |
| Compression set | % (ASTM D395) if used to split grade | Optional unless used as a grade split | Factory value for the quoted cure |
| PCR or reprocessed content | % by weight if the buyer asked | Optional | Written percentage, not a brochure claim |
What the supplier must send back
Product files
- Full description as it will appear on the invoice.
- ID/OD or drawing, compound, Shore scale.
- Shore A or Shore D confirmation.
Lot files
- Documents that name the grade and lot.
- Named ASTM or equivalent report.
- Origin of melt or finishing if the plant will be asked.
Commercial files
- Quantity and unit; sample versus production split.
- Packing and Incoterms next to the money figure.
- The date the factory says it can ship.
Send the polyurethane vs rubber bushings sheet
Commodity nylon sleeves and this elastomer line are different requests. If the buyer later wants a leftover lot, open a new brief; do not treat the swap as a courtesy upgrade.
Send Your Requirement Sheet