Full definition
Flexible elastomer cup gripping workpieces via differential pressure (vacuum). Shapes: flat (smooth rigid surfaces, Ø 6-250 mm), bellows 1.5/2.5/3.5 convolutions (curved/irregular surfaces), oval (elongated parts). Materials: NBR (oils and greases), silicone (FDA/food-grade, up to 200°C), Viton (aggressive chemicals), polyurethane PU (abrasive surfaces). Maximum holding force = 0.7 bar × effective area × 0.7 (safety factor). Brands: Schmalz (PFYN/SAF), Festo (ESS), SMC (ZP), Piab.