Insulation class  Class B 130 C
Insulation resistance  100M¦¸minimum under normal temperature and humidity, when measured by a 500VDC megger between the motor coils and casing
Insulation voltage  Sufficient to withstand 1.0kv, 60Hz applied between the motor coils and casing for 1 minute, under normal temperature and humidity
Temperature  Ambient temperature  - 10C ~ + 50C
 Ambient Humidity  85% or less
 Gas medium  No corrosive gas and dust, can not directly contact water and oils(expect special airproof motor)
Temperature rise  Resistance Method is 80 oC or less (at standstill, two phase energized)
Shaft Runout  0.05mm(T. I. R) at top of output shaft
Axial Play  0.025mm Max. Of 1.12 1b. (5N)
Redial Play  0.075mm Max. Of 2.2 1b. (10N)