SANDMARK has successfully qualified and is now manufacturing production quantities of pulleys for an OEM customer. The material used for this family of pulleys is cast steel. Blanks are first cast using shell-mold sand casting process, which provides considerably higher quality than a standard green sand casting process with the type of surface finish and material strength that the application requires. The blanks are then machined to specifications. After machining, each pulley is dynamically balanced to meet the performance requirements at their rated rotational speeds.
These pulleys are used in automotive applications and each pulley is expected to have zero defects, low imbalance, and very long operational life in demanding environments, operating 24/7 for extended periods of time. As such, the products undergo vigorous quality inspection and testing procedures before they are shipped to our Customer.