Worm gearboxes manufactured by Greenshpon are gearboxes designed for particularly difficult working conditions.

The snail is similar in shape to a moving screw. It can have a single start or multiple starts, allowing for a large range of transmission ratios at the same distance between the axles and the same wheel dimensions.

The helical wheel is similar in shape to a cylindrical gear with beveled teeth, adapted to the snail’s teeth. For the production of the snail wheel, materials with a low coefficient of friction and abrasion resistance are used.
Snail gears can be obtained with a large transmission ratio, they allow self-braking (the direction of movement transfer is only one) thanks to the similarity between the snail and the screw