NEMA MG.1:20.30 End Play and Rotor Float for Coupled Sleeve Bearing Horizontal Induction Machines.
20.30.2:Limits:Machine HP/Syn.Speed/Min.Motor Rotor End Float/Max.Coupling End Float:500hp and below/1800rpm and below/0.25"/0.09": 300hp and500hp/3600and3000rpm/0.5"/0.19" :500hp and higher/all speed/0.5"/0.19".