Please read before use:

• Load condition
• Speed of rotation or speed ratio (combination with combined speed reducer can get extra low outputting rotational speed )
• Work circumstance (temperature, humidity, corrosion, etc.)
• Space of installation

Ensure coefficient of work condition K1 and coefficient of revise K2

• According to the table 1, choose machinery loading type A, B, C
• According to the working time(h/d) and f「equency (times/h ) get the coefficient of work condition K1 from table 1
• According to Table 2, pick up the coefficient of the revised K2

Table 1 Machinery load classification selection

Table 2 Working condition coefficients K2

Diagram 1 working condition coefficient K1

How to select

• At first, to ensure the value of input machinery load T(torque), multiple K1 and K2 by T, then you can get the value of output torque, on the basis of which, also consider the speed of output rotation or speed ratio, then you can choose a specification
• You can calculate the output torque based on the known input power, reasonable ratio or speed of output rotation, then you can choose specification.

Example for model selection
Ex1. General conveyor belt (uniform load)

• Torque: 19N.m
• Turning time: 8hs/day
• Speed of rotation: about 55r/min
• start frequency: 1 Otimes/h
• Ratio:1/25
• Temperature:25°C (indoor) Connect with motor direct

1.  According to Table 1, ensure the type of load
      Type of load: load-bearing uniform without impact, choose A;
2. According to diagram 1, choose the point 1 Otimes/h on the intersection A, we can get the K1 =1 of turning time 8hs/d;
3. According to the table 2, get the K2=1;
4. The value of torque is 19 x K1 x K2=19 x 1 x 1=19N.m,choose the closest 19N.m reducer.
Choose selection: NMRV30-1/25
Input power = 0.18kw, the speed of output rotation is= 56r/min，
the value of output torque is 21 N.m

Ex2.con conveying belt( moderate load)

• Torque: 65N.m
• Turning time: 16hs/d
• Speed of rotation: about 21 r/min
• Start frequency: 1 OOtimes/h
• Ratio: 1/60
• Temperature: 35°C (indoor) Connect with motor direct

1 . According to Table 1, ensure the type of load
    Type of load: light load-bearing, choose B; 
2. According to diagram 1, choose the point 1 OOtimes/h on the intersection B, then you can get the K1 =1.65 of turning time16hs/d; 
3. According to the table 2,get the K2= 1.15; 
4. The value of torque is 65 x K1 x K2=70 x 1.65 x 1.15=123N.m, choose the closest 123N.m reducer ..
Choose selection: NMRV63-1/60.
Input power = 0.55kw, the speed of output rotation =23.3r/min,the value of output torque is 140N.m