Coffee utensils | Fine Coffee Bean Grinder hand shakes electric which is better? what's the difference between hand-ground and motor-ground coffee beans

Before brewing, coffee beans will be ground into powder with grinding utensils. Bean grinders on the market are divided into two categories, one is hand grinding, the other is electric bean grinder, and the two have different grinding efficiency.

The main difference between the two kinds of bean grinders is the grinding speed, and the effect of speed on coffee powder is the uniformity of grinding particles and the volatilization speed of aromatic substances. The efficiency of the hand bean grinder is lower than that of the electric bean grinder, and under the condition of manual control, it is difficult to achieve uniform force. it is easy to grind the beans unevenly when grinding some shallow baked beans with low carbonization degree of coffee fiber. on the other hand, the electric bean grinder is easy to cut the beans quickly because of the high torque and fast speed of the electric motor.

In terms of the retention of aromatic substances, the manual bean grinder is better than the electric bean grinder. When the knife head of the bean grinder rotates, it is heated because of the friction between the coffee bean and the knife head. The speed is fast, the heat generation is fast, the speed is low, and the heat decay time is faster than the heat generation time. Coffee beans contain more than 1000 kinds of volatile aromatic substances, in the case of heat, the molecular activity of these aromatic substances becomes active, and the volatilization efficiency is improved, so if you want to retain more aromatic substances, you will generally choose a hand grinder.