Copper 90%, lead 5%, tin 5%

Copper 94%, lead 4%, tin 2%

Copper 88%, zinc 2%, tin 10%

Copper 85%, lead 5%, zinc 5%, tin 5%

Aluminium

Gunmetal

Brass

Bronze

G.I sheet

Copper sheet

Steel sheet

Aluminium sheet

To maintain the tension

To decrease the tension

Keep the belt centralised

Allow free rotation of pulley

Rope drive

Gear drive

Pulley drive

Chain drive