Hydraulic gear pumps and hydraulic piston pumps are used to transform mechanical energy into working fluid energy - pressure and flow. Hydraulic pumps can be driven directly or through an additional gear (gear, chain, belt). In both cases, axial or radial loading of the pump shaft must not be allowed. Hydraulic pumps are designed with a displacement of generally 0.25 to 140 cubic centimeters and provide a pressure of up to 250 bar.

More popular types of gear pumps are: 20А(С)...Х006, 20А(С)...Х007, 20А(С)...Х016, 20А(С)...Х022, 10А(С)...Х001, 10А(С)...Х026, 10А(С)...Х017, 30А(С)...X002, 30А(С)...X013, 30А(С)...X068, 30А(С)...X146, 30А(С)...X160, 30А(С)...X169, 30А(С)...X190, 30А(С)...X197

НШ10..., НШ32..., НШ50..., НШ100, А72Х, С72Х, А94Х, С94Х, С43ХТ, А280ХТМ, А165Х, С165Х, А54Х, С54Х, А10Х8N, С10Х8N