Recent Blogs
Crossed Belt Drive Mechanism: How It Works, Diagram, Belt Length Formula, Parts and Uses
Explore crossed-belt geometry and opposite pulley rotation. Calculate ideal centerline length, speed ratio, wrap angle and center-distance-to-width ratio.
Belt Engage/disengage/reverse for Upright Shaft Mechanism: How It Works, Diagram & Parts
Explore a single-belt reversing drive with concentric shafts, a loose centre pulley and opposed bevel gears. Compare pulley spacing, fork opening and force units.
Shifting Device for Cone Pulleys: How It Works, Parts, Diagram, and Speed Ratio Calculator
How a shifting device for cone pulleys works on lathes, drill presses, and line-shaft machinery — belt fork geometry, ratio steps, and worked sizing example.
Right Angle Shaft Transmission Mechanism: How It Works, Bevel Gear Parts, Uses & Calculator
Calculate speed, torque and power for a right-angle bevel pair from tooth counts and input conditions. Explore reduction, speed increase and assumed efficiency.
Friction Clutch in a Bevel Drive: Torque Comparison | FIRGELLI
Explore a friction-coupled bevel drive and compare ideal flat-interface torque with demand, including a fixed 1.4× preload scenario.
Belt Shipper Mechanism Explained: How It Works, Parts, Diagram, Animation, and Fast/Loose Pulley Uses
Explore a belt shipper’s fork, guided rod and lever. Calculate the ideal force component from equal belt-span tensions and compare lever ratios.
Suspended Swing Treadle: Hiscox Linkage and Joint-Arc Calculator
Explore the Hiscox suspended swing treadle and an animated suspension-joint arc calculator. The calculator does not simulate the complete foot path.
Spherical Step Bearing Mechanism: How It Works, Parts, Diagram and Uses in Mills and Line Shafts
Spherical step bearings carry vertical shafts in mills and factories. Learn how they work, load math, failure modes, and real applications in flour and textile...
Simple Friction Pulley Mechanism: How It Works, Capstan Equation, Parts, and Uses Explained
How a simple friction pulley transmits torque through belt grip in mill and factory drives. Includes the capstan equation, worked example, and selection guide.
Hanging Shaft: Overhead Belt Drive and Shaft-Span Calculator
Explore overhead line-shaft bearings and belt take-offs. Compare a chosen span reference and the first bending frequency of an ideal bare steel shaft.
Friction Clutch: Torque Capacity and Mean Radius | FIRGELLI
Calculate ideal plate-clutch torque from clamp force, coefficient, effective radius and active faces, then compare an entered load torque.
Collar Bearing and Step Mechanism Explained: Parts, Diagram, Formula, and Uses
Explore rotating collars, a fixed thrust sleeve and a footstep. Calculate an assumed axial-load split in short ton-force; actual sharing and capacity require bearing data.
Clutch and Gear Mechanism: How It Works, Parts, Diagram, Formula and Industrial Uses
Explore a single-surface friction clutch driving an external gear pair. Calculate ideal torque capacity, locked output speed and power at the entered capacity.
Belt Holder: Fixed Roller Support, Belt Speed and Roller Loads
Explore a fixed roller belt holder beside a disengaged machine pulley. Calculate belt speed, roller speed and ideal support loads from diameter, speed and tension.
Adjustable Universal Sheave Mechanism Explained: How It Works, Parts, Diagram, and Uses
Explore a variable-pitch V-belt sheave and calculate ideal driven speed from pitch diameter and adjustment turns. Understand the separate groove-centerline assumption.
Fly-wheel or Pulley Governor: Force and Spring Calculator | FIRGELLI
Learn how a shaft governor adjusts valve gear. Compare centrifugal force and an ideal direct spring displacement without claiming engine regulation or tuning.