Multiple Stamped Sections, One Rigid Assembly
Some V-belt pulley geometries — particularly multi-groove and stepped-diameter designs — are more efficiently built as two or more stamped sheet metal sections joined by rivets than as a single spun or cast piece. Riveting avoids the heat-affected zone and distortion risk of welding, keeps the assembly serviceable in some industrial designs, and holds tight concentricity because each stamped section is dimensionally controlled before assembly.
JBMK stamps each section on our 80–300T press lines, then joins them on dedicated riveting fixtures with in-line runout verification, so the finished assembly meets the same balance and concentricity standard as our single-piece spun and stamped pulleys.
Multi-Section Stamping
Each pulley half or web stamped independently for dimensional control before assembly.
Precision Riveting Fixtures
Fixture-controlled riveting for consistent clamp load and repeatable concentricity.
Up to 40% Mass Reduction
Lighter than an equivalent cast or solid-machined V-belt pulley of the same load rating.
Runout Verified Post-Assembly
Every riveted assembly checked on CMM and balancing rigs after joining, not only pre-assembly.
