What is called gear closed drive, open drive?
The gear open drive is the gear form that the gear is exposed to the air and is not sealed.The gear closed drive is the gear form in which the gears are all enclosed in the gear box.
In the relatively closed space, the gear drive is called closed transmission, and the opposite is open transmission.
Gear transmission: installed in the box body, for example, machine tool headstock gear box, drag machine.Open transmission: exposed outside, such as cement mixing machine on the site, transmission, winding machine, transmission, etc.
