The screw and helical gear wheel together form the helical gear. Both axes are placed at an angle of 90° to each other.
The screw is a single- or multiple-run gear, with the tooth being wound spiralling around the cylinder. It therefore is very similar to a screw.
Hardened and polished screw shaft with helical gear of GBZ 12
Multiple-run screw with helical gear with trapezoidal thread
Screw drive with hardened and polished screw, helical gear of GBZ 12
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