MODEL UM – RM 165 1. Rotary mower was designed with 8 blades. 2. The biggest benefits of design are fuel and time savings. Number of rotors 2 Working width 160 Number of blades 8 Weight 380 kg Matched power 25- 30 HP 1. Rotary mower was designed with 8 blades. 2. The biggest benefits of design are fuel and time savings.