Double Body Fly Press

noun. a hand-operated press in which a horizontal beam with heavy steel balls attached to the ends gives additional momentum to the descending member used to punch or compress material.A fly press is a type of screw press in which the screw shaft is driven by a flywheel or a pair of fly weights at the ends of a bar.A toggle press is a type of manually operated machine press that leverages a pair of levers to apply force to a workpiece. After positioning a workpiece, you can pull the hand lever. Pulling the hand lever will drop a secondary, smaller lever onto the workpiece. Most toggle presses are bench mounted.