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