Recent Blogs
Chain and Pulley (form 3)
Chain and Pulley form 3 drive explained — how the hybrid chain-over-sheave system handles slip-free torque transfer in conveyors, hoists, and stage rigging.
Two-speed Transmission via Four Pulleys
How a Two-speed Transmission via Four Pulleys works, with belt-shift sequence, ratio math, and a worked lathe example. Used in machine shops worldwide.
White's Pulleys
White's Pulleys explained — how this rope-and-pulley tackle multiplies hauling force up to 6:1 for theatre rigging, sail handling, and field hoists.
Vibratory Belt Motion via Segment Lever
How a segment lever drives vibratory belt motion — geometry, formulas, and a worked example for bulk-handling and food-processing belt feeders.
Two-speed Transmission with Three Pulleys
How a two-speed transmission with three pulleys works, with belt-shifting mechanics, ratio math, and a worked example from a small machine shop drill press.
Two-speed Transmission with Differential Motion
How a Two-speed Transmission with Differential Motion combines two pulley ratios into one shaft for variable output. Formulas, worked example, design tradeoffs.
Two Fixed and One Movable Pulley Combination
Two fixed and one movable pulley combination explained — mechanical advantage, rigging math, and real lifting examples from theatre, marine, and warehouse work.
Sprocket and Chain Drive
How a Sprocket and Chain Drive transmits torque without slip — pitch, ratio, and chain tension explained for conveyor, motorcycle, and robotics builds.
Spanish Barton (form 2)
Spanish Barton form 2 rigging explained — how stagehands and riggers achieve 5:1 mechanical advantage with two single blocks to lift heavy loads safely.
Spanish Barton (form 1)
How the Spanish Barton form 1 tackle works, its 5:1 mechanical advantage, rigging formula, and worked example for lifting heavy loads in arborist and rescue...
Simple Lifting Pulley
How a simple lifting pulley works — fixed single-sheave mechanics, rope tension math, and real rigging examples from workshops, theatres, and barns.
Pulley System with Cord and Movable Pulleys (d)
How a cord-and-movable-pulley system halves lifting force. Real worked example, mechanical advantage formula, and rigging examples for shop and field use.
Pulley System with Cord and Movable Pulleys (c)
How a cord-and-movable-pulley system halves lifting force in rigging, theatre, and workshop hoists. Mechanical advantage formulas, worked example, and diagrams.
Pulley System with Cord and Movable Pulleys (b)
Movable pulley systems with cord cut lifting force in half or better. See how riggers, theatres, and shipyards use them to hoist heavy loads with...
Pulley System with Cord and Movable Pulleys (a)
Movable pulley systems with cord cut lifting force in half or more. Learn the mechanical advantage formula, real rigging examples, and design tradeoffs.
Power From Horizontal to Two Vertical Shafts via Pulleys and Band
How a single horizontal shaft drives two vertical shafts via crossed pulleys and a flat band — used in line shafting, mill drives, and overhead...
Plain Pulley for Flat Belt
Plain flat-belt pulley design explained — crown geometry, tracking, slip, and sizing for industrial conveyors, line shafts, and machine drives.
Notched V-grooved Pulley for Round Band
Notched V-groove pulleys for round drive bands grip O-ring belts in light power transmission — phonographs, sewing machines, and benchtop lathes. Specs and sizing inside.
Movable Pulley with Constant-tension Counterweight
How a movable pulley with constant-tension counterweight balances loads in theatre flies, sash windows, and lab gantries. Formula, worked example, and design rules.
Movable Lower Pulley (single-movable)
Learn how a single movable lower pulley halves lifting force in rigging, elevators, and theatre fly systems. Formulas, worked example, and design tradeoffs.
Modified Cone Pulleys
Modified Cone Pulleys deliver stepped speed changes on lathes, drill presses and mills. See how they work, the speed formula, and worked examples from real...
Friction Pulley with Eccentric Arms
Friction pulley with eccentric arms explained — how the spring-loaded arms grip the belt under load, sizing math, and uses in textile and paper machinery.
Flanged Pulley for Flat Belt
Flanged pulleys keep flat belts tracking true on conveyors, line shafts, and packaging machines. Sizing rules, crown vs flange tradeoffs, and a worked example.
Expanding Pulley
Expanding Pulley explained — how variable-diameter sheaves change ratio on the fly, where they're used in CVT scooters, drill presses, and farm machinery.
Detachable Chain Link
Detachable chain links connect and disconnect drive chains without tools. See how they work, where they fail, and how to size them for conveyors and...