Gear module selection
National standards for the gear module GB1357-78.
Preferred module: 0.1mm, 0.12mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 1mm, 1.25mm, 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, 25mm, 32mm, 40mm, 50mm;
Optional modules: 1.75mm, 2.25mm, 2.75mm, 3.5mm, 4.5mm, 5.5mm, 7mm, 9mm, 14mm, 18mm, 22mm, 28mm, 36mm, 45mm;
Seldom used modules: 3.25mm, 3.75mm, 6.5mm, 11mm, 30mm