Product Quality


ISO Certified

WCCO has been ISO:9001 certified since 1997.  Our product quality system begins with our vendors at fabric construction and rubber mixing, and then we follow materials through to the final vulcanization in our manufacturing facilities.  WCCO’s commitment to quality is one reason we are the supplier of choice to manufacturers around the world.

Raw Rubber Quality Process

Each batch of rubber compound mixed by our qualified vendors is tested.  Our vendors send rubber test certifications to WCCO to be reviewed prior to the calendering process.  This review ensures that every batch of rubber meets our strict specifications.  All rubber test certifications are saved indefinitely in our system.

When the test certifications are approved by WCCO’s engineers, they will communicate the test results to our calendering company, CSI Calendering.  CSI will then give every batch of rubber its own lot number for tracking purposes throughout the full manufacturing process (from calendering to vulcanization). 

Raw Fabric Quality Process

Our fabric vendors visually inspect 100% of our fabric with the use of a light bar.  Also, they send fabric test reports for every individual roll to WCCO’s engineering team for approval prior to shipment.  Our engineers will review the test reports for each roll (warp, weft, etc…) and categorize any defects before the rolls can be dispatched.  All fabric test results are saved indefinitely in our system.

When the fabric rolls are permitted to ship, WCCO’s engineers will communicate the test results to our calendering company.  CSI will then give each individual roll its own lot number for tracking purposes throughout the full manufacturing process (from calendering to vulcanization).  Additionally, the fabric shipment will contain a package of test samples from each roll in the container. These samples are kept on-hand for at least two years for our own random testing.

The WCCO Diamond Number

Every WCCO rubber product has a WCCO Diamond Number for product traceability.  Our Diamond Number is a lot number that is pressed into the rubber product during the single-step vulcanization stage.  Because it is not stamped or written on the belt post-vulcanization, it will not diminish during product use.  Using the Diamond Number, we can obtain specific details of that individual product; this includes the date the product was manufactured, as well as the batch of rubber used and single fabric roll picked during the calendering process.  

When our competitors buy raw materials on the open market, they lose any visibility regarding product quality and consistency.  Our ability to track problems back through the calendering process and raw material creation allows us to  fully resolve any issues our customers experience.