Harmonic Gearbox CSF-50-120-2UH

Harmonic Drive Reducer CSF-50-120-2UH

The purpose of lubrication in the Harmonic Drive reducer CSF-50-120-2UH is to reduce friction loss and wear on contact surfaces and to remove wear debris. In addition, lubrication cools the parts, prevents corrosion, and the oil film on the contact surfaces can cushion impacts.  Furthermore, by reducing friction on the lubricated surfaces, it can reduce noise and vibration during reducer operation.

Gears and bearings in the reducer can be lubricated by a common lubrication system or by two separate lubrication systems. A common lubrication system is a circulating lubrication system with a common oil tank and intermediate cooling device, but the gears and bearings are lubricated by separate circulating circuits with different oil pressures.

Immersion lubrication is only used for reducers with a gear circumferential speed less than or equal to 12.5 m/sec. When the speed exceeds 12.5 m/sec, the oil is agitated and foams, which deteriorates lubrication and cooling, and causes rapid aging of the lubricating oil, resulting in significant oil loss. Increased foaming will increase the oil temperature and reduce the viscosity of the lubricating oil.

If the lubricating oil is not regularly checked for quality, the lubricating oil should be replaced after 1 to 2 years of operation, but this replacement period does not include the oil change after the reducer's run-in period.

If the cantilevered bevel gear shaft is very short, and the effect of thermal deformation of the shaft on the gear position is negligible, a simple bearing cup can be used at the free end of the Harmonic Drive reducer CSF-50-120-2UH shaft, while the radial roller bearing or spherical roller bearing near the gear can be directly installed in the bore of the housing. For rolling bearings with non-separable outer rings, the outer ring does not require fixing within the shaft. Because this support has no cup, its radial rigidity can be improved, because the cup needs to move axially during the process of adjusting the gear meshing position. Therefore, a relatively loose fit is usually selected. The bearing away from the gear bears radial and axial forces and is installed in the cup. The axial position of the bevel gear is adjusted using a bearing sleeve.

In Harmonic Drive Systems CSF-50-120-2UH reducers, when the radial dimensions of the support components for the bearing without a seat ring are limited, roller bearings and needle bearings without inner or outer rings can be used. In this case, the bore of the shaft, gear, or planetary gear can directly serve as the bearing raceway.

The surface hardness and finish of the parts used as raceways should meet the standards in the bearing industry. The shafts and gears used in this type of structure are often made of carburized steel.