Specifications
Precision grade JIS quality N9 (JIS B1702-1: 1998) ＊ JIS quality 5 (JIS B1702: 1976)
Reference
portion of gear Normal plane
Gear teeth Standard Plastic Screw Gears complete depth
Normal
pressure angle 20°
Helix angle 45°
Material Acetal Acetal is a stable plastic material with inherent self-lubricating properties which can be improved with lubricating fillers.
Delrin Delrin is an engineered plastic-type material with a good combination of toughness, stiffness, wear and abrasion level of resistance, and low frictional characteristics.
Nylon Nylon, comprising many grades of polyamides, is a general-purpose material in wide make use of. It is tough and resistant and offers great pressure ratings.
Polycarbonate Polycarbonate can be an extremely challenging 
polymer which can be machined to close tolerances. Lubrication is sometimes needed, as the use properties of polycarbonate are not as good as some other polymers.
Other Plastic Other unlisted or specialized polymers or plastic components.