#155 Elbow-Lever Pawl Feed Motion for Planing Machine – 507 Mechanical Movements 3D Animation

Movement No. 155 converts reciprocating rectilinear motion into intermittent circular motion using a pawl mounted on an elbow-lever (bell-crank), engaging a toothed wheel. As the elbow-lever is pushed and pulled by a reciprocating rod, it oscillates about its fixed pivot. A pawl attached to one arm of the elbow-lever engages the teeth of a ratchet wheel: on one stroke, the pawl catches a tooth and advances the wheel by one step; on the return stroke, the pawl slides over the teeth without engaging, leaving the wheel stationary. The direction of the wheel's intermittent rotation can be reversed simply by switching the pawl to the opposite side of the lever — allowing it to engage the teeth in the other direction. This reversible step-feed mechanism was widely used in planing machines, slotting machines, and other metal-cutting tools to incrementally advance the workpiece or table by a precise amount with each cutting stroke of the machine. ━━━━━━━━━━━━━━━━━━━━━━━━ 📚 BROWSE ALL 507 MECHANISMS 🔗 https://mech.formline3d.com New mechanism every day. ━━━━━━━━━━━━━━━━━━━━━━━━ 3D visualization of mechanism from the classic engineering reference "Five Hundred and Seven Mechanical Movements" by Henry T. Brown. About this Project: I am recreating all 507 mechanical movements in high-quality 3D animations. This library serves as a visual guide for engineers, students, designers, and hobbyists to understand kinematics and mechanical design. Support the Library: If you find these visualizations helpful, please subscribe to follow the progress as I complete all 507 movements. #MechanicalMovements #Engineering #Mechanism #Kinematics #IndustrialDesign #507Movements