Recent Blogs
Four-pulley Two-speed Drive: Ideal Ratio Comparison
Compare two ideal no-slip speed ratios and their paired pitch-diameter sums. Equal diameter sums alone do not establish that the same belt fits both positions.
Cone-drive Ratio: One-point Pitch-diameter Comparison
Compare one pair of effective pitch diameters and an entered target sum. Calculate ideal ratio and reciprocal torque factor; cone profiles, belt length and sheave...
Curved Cone Pulleys Mechanism: How It Works, Parts, Formula, and Uses Explained
Explore opposed curved cone pulleys and calculate speed ratio, output speed, driver surface speed and ideal torque ratio at one selected belt station.
Shaft Step Adjustment Mechanism Explained: How Stepped Cone Pulleys Change Shaft Speed
Shaft Step Adjustment explained — how mill operators tune stepped-pulley and stepped-cone drives to hit target spindle speeds without slipping belts or grinding gears.
Belt Drive Power Transmission: Speed Ratio, Torque and Power
Compare two pulleys using effective diameters, driver speed and torque. Apply an entered efficiency to power while retaining the ideal no-slip speed ratio.
Stop Driving and Reversing Motion: Belt Selector and Bevel Drive
Explore a single-belt forward, neutral and reverse selector. Compare ideal output speed and belt speed for Hiscox movement 95.
Evans Friction Cones: Ring-Belt Ratio Calculator | FIRGELLI
Move a leather ring between opposed friction cones and compare mean contact diameters and ideal speed ratio. Finite ring width introduces slip.
Variable-speed Belt Drive: Ideal Ratio, Speed and Torque
Calculate an ideal belt-drive ratio from effective pitch diameters, plus output speed, pitch-line speed and torque from assumed transmitted power. Belt selection and sheave actuation...
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.