Steel screws
The screws are made of case-hardened steel, flanks and bore are ground.
Worm wheels made of brass
The worm wheels are made of a special alloy (copper-zinc alloy) with additives of aluminum, silicon and manganese. It is a special quality developed for sliding purposes.
The chemical resistance is very high due to the aluminum content.
Worm gears made of brass have good corrosion resistance, high strength, good sliding properties and high wear resistance.
Note:
The lead content in worms and worm wheels made of brass is ≤0.1 percent by weight
Plastic worm gears
Owing to their poor thermal conductivity, plastic worm gears are only suitable for low sliding speeds of < 1.5 m/s and medium tooth flank loading. The worm must be hardened and must have ground flanks.
Plastic worm gears have around 60% of the torque capacity of comparable bronze worm gears (this applies for use with mineral grease).
Bronze worm gears
Cu Sn 12 DIN 1705
Relatively soft material with good wear resistance: suitable for high sliding speeds.
Cu Sn 12 Ni DIN 1705
Relatively soft material with very high wear resistance: suitable for very high sliding speeds.
CuAl10Fe3 Mn2 DIN 17665 / 17672
Relatively hard anti-friction materials for high loads and relatively low rotational speeds.
Please find more details at our Worm gear set catalog.
The screws are made of case-hardened steel, flanks and bore are ground.
Worm wheels made of brass
The worm wheels are made of a special alloy (copper-zinc alloy) with additives of aluminum, silicon and manganese. It is a special quality developed for sliding purposes.
The chemical resistance is very high due to the aluminum content.
Worm gears made of brass have good corrosion resistance, high strength, good sliding properties and high wear resistance.
Note:
The lead content in worms and worm wheels made of brass is ≤0.1 percent by weight
Plastic worm gears
Owing to their poor thermal conductivity, plastic worm gears are only suitable for low sliding speeds of < 1.5 m/s and medium tooth flank loading. The worm must be hardened and must have ground flanks.
Plastic worm gears have around 60% of the torque capacity of comparable bronze worm gears (this applies for use with mineral grease).
Bronze worm gears
Cu Sn 12 DIN 1705
Relatively soft material with good wear resistance: suitable for high sliding speeds.
Cu Sn 12 Ni DIN 1705
Relatively soft material with very high wear resistance: suitable for very high sliding speeds.
CuAl10Fe3 Mn2 DIN 17665 / 17672
Relatively hard anti-friction materials for high loads and relatively low rotational speeds.
Please find more details at our Worm gear set catalog.
