Compared with the old ones, the new standard NGW type planetary gear reducers have the following advantage: 

Their main spare parts such as gears, shafts are made of high-strength alloy steel and treated with cementite, quencher, and milling gear. 
Large range of load-bearing capacity from less than 1kw to more than 20 thousand Kw. 
Various mounting mode. 
Smooth running, low noise. 
Light weight, compact design.

Specifcation	Nominal speed ratio	Input speed(rpm)	Input power (kw)
NAD200-NAD2000 NAF200-NAF560 NAZD200-NAZD1600 NAZF200-NAZF560	4-18	600-1500	10-28842 10-3108 7.9-7582 7.9-641
NBD250-NBD2000 NBF250-NBF560 NBZD250-NBZD1600 NBZF250-NBZF560	20-125		7.6-11899.5 7.6-404 2.6-2315 2.6-210
NCD315-NCD2000 NCF315-NCF560	112-400		2.2-2860 2.2-118
NCZD315-NCZD2000 NCZF315-NCZF560	450-1120		0.6-871 0.6-40.6