Belt and Chain Drives

These tools size belt and chain drives from the pulley or sprocket sizes and the centre distance. They give belt or chain length, drive ratio and belt speed, and the chart looks up ANSI and ISO roller chain dimensions.

Tools in this group

• Belt Length Calculator — Enter both pulley diameters and the centre distance to get the belt length, or a belt length to get the centre distance, with wrap angle and speed ratio.
• Chain Length Calculator — Enter the sprocket teeth, chain pitch and centre distance to get the number of links, or use the bicycle mode for a derailleur chain.
• Conveyor Belt Speed Calculator — Enter the drive pulley diameter and its rpm, or the motor speed and gearbox ratio, to get the belt speed, or find the rpm for a speed you need.
• Roller Chain Size Chart — Look up the pitch, roller diameter and inner width of ANSI and ISO roller chain, decode a chain number, or identify a chain you measured.
• Sprocket Calculator — Get the ratio, sprocket diameters and chain speed of a roller chain drive, or see how changing a motorcycle sprocket changes gearing and speed.
• Timing Belt Calculator — Pick the belt pitch and enter the pulley teeth and centre distance to get the belt size, or enter a belt to get its exact centre distance.
• V Belt Calculator — Choose the belt section and enter the pulley pitch diameters and centre distance to get the belt length and the nearest standard size.