Industrial Home Use Food Grinder Spice Dry Chilli Mill Grinder Pepper Spice Grinding Machine

The working time is depending on the material. 

when you put the material into the cabin, please put it to half of the cabin. The effect will be better. 

And you should let the material cover the blade at least. If you feel the machine is a little hot. Please let it have a rest.

5. about the nuts,  and other things with oil. It' better to grind 2-3 seconds, then stop. again, grind 2-3 seconds, then stop. again.... It's to prevent the powder stick to the cabin. Because when the machine working, the speed of the motor is very quickly, and the material will collide with blade and cabin , then it will generate heat. And the material is oily, it will stick to the cabin easily.