difference between i and rpm

[SAEEDGH]

hi. i want to buy a new motor.in the nameplate there is difference between i and rpm.
in the available motor i:105.28 and rpm is 1300/12
why 1300/12=108.33 is different from i=105.28

do i should buy a gearmotor with i=105.28 or i=108.33

 

[mfgenggear]

Asadeedgh

We have no clue with the information provided.
Please contact the manufacture of the motor or the equipment manufacture for that advice.

Gear boxes are designed for the RPM input
, the torque rating. Duty cycle. The out put of the gear box is based on the input with the desired gear ratios. Output torque, and rpm.
A puley setup would be the same. Which is unknown here.

 

[PersonalProfile]

1. I speculate that 105.28 is the reducer's precise ratio, and the ratio that you calculated is an "approximate" e.g. a practical motor's angular speed will not be 1300 RPM etc, due to various reasons, including slip, and
2. A ratio of 105.8 exists according to the catalogues available following:

https://www.sew-eurodrive.com.au/pr...elical_gear_units_r/helical_gear_units_r.html