From Coil to Formed Pulley Blank
Stamping forms a pulley from flat steel coil in a series of press operations — blanking, drawing, piercing, and forming — run in progressive or transfer dies. It's the most economical process for high-volume pulley production, and the one JBMK relies on for the majority of the accessory-drive catalog: water pump, power steering, A/C, and crankshaft pulleys are all stamped before any secondary CNC machining is added.
This page is the capability overview for stamping as a process. If you're evaluating a specific stamped product, see the application-specific pages below — each is engineered and toleranced for its own duty cycle rather than sharing a generic spec.
21 Press Lines, 80–300T
ISGEC mechanical presses covering a wide range of pulley diameters and material gauges.
In-House Die Design
Progressive and transfer dies designed and built in our own toolroom for faster new-part introduction.
In-Line Dimensional Inspection
Camera and gauge checks integrated into the press line, not only at final QC.
PPAP Level 3 Documentation
Full process capability and part-approval documentation on every stamped program.
