HI,(adsbygoogle = window.adsbygoogle || []).push({});

please help me... I am thirsty for any insights to my problem.

I have a motor:

Output: 60W

VOLT:12V DC

AMP: 7.5A

RPM:1800

TORQUE: 3.5kgcm

I have a motor reducer:

for converting rotation movement of motor to up and down motion(for lifting heavy load)

look like this http://www.yhcdsb.com/Eweb/uploadfile/20120405235504775.jpg [Broken]

It has a speed reduction ratio of 12:1.

Based on theory, if I have a 3.5kgcm input torque to the motor reducer,I will get 3.5kgcm x 12= 42kgcm from the motor reducer. It means that I will have no difficulties in lifting loads less than 30kg without damaging the motor, right???

The problem is I tried both AC and DC motors. Both of them have difficulties lifting the 30kg loads and generate high heat which cause the motors to slowly die out.

I have checked the circuitry and no problem was found on the power supply.

I am really confused about the gear ratio stuff... I get my speed reduced by a factor of 12. Does it mean that my torque is multiplied by a factor of 12 too??? It seems not to be the case. Does the efficiency of the motor reducer places an important part on it???? how significant is it?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Motor and Reducer relationship

**Physics Forums | Science Articles, Homework Help, Discussion**