Cylindrical horizontal two-stage gearbox GD

General purpose horizontal two-stage helical gearboxes. Type GD are used in
drives of various machines and mechanisms to change the torque and speed.
Conditions of application:
operation for long periods of up to 24 hours per day or with periodic stops;
operation in continuous and repeated-short-term modes, i.e. under alternating loads with
periodic stops;
single direction and reversible loads;
shaft rotation in any direction;
non-aggressive environment, atmosphere of types I and II according to GOST 15150 with air dustiness not more than 10 mg/m3;
climatic versions - ?1, ?2, ??, ???-4, ?1, ?2, ?? and ?4 according to GOST 15150-69.
Assembly variants
Designation
GD-III-31.36-21(A)-U1, where
GD-III - gearbox standard size,
31.36 - gear ratio,
21 (A) - assembly variant (21 - new designation, A - old designation),
U1 - climatic execution and placement category.