Grain Size Of Grinding Wheel
Dec 25, 2021
1. Classification of granularity
Abrasive Grade 2000 - 40 μ M [micron]
Micro powder grade 40 - 0.5 μ M [micron]
For particle sizes greater than 40 μ M abrasive, called abrasive particles. It is classified by screening method. The particle size number is expressed by the number of holes within the length of inches on the screen through which the abrasive particles pass. For example, 60# of the abrasive particles mean that their size can just pass through the screen with 60 holes per inch. For the particle size less than 40 μ M abrasive, called micro powder. Grading by micrometric method, W and the following numbers represent the particle size number, and the value after w represents the actual size of the micro powder. For example, W20 represents that the actual size of the micro powder is 20 μ m。
2. Range of particle size
Rough grinding 80#-120#; Semi fine grinding 120#-180#; Fine grinding 180#-w40; Polishing w40-w1
← rough grinding (high efficiency, low surface finish)... 24 #, 30 #... 180 #, 240 #, W40... (good finish, low efficiency) polishing →
3. How to select grinding wheel size
It mainly depends on what kind of surface finish and dimensional accuracy the grinded workpiece wants to achieve, what kind of grinding efficiency it wants to achieve, and the hardness of the grinded object.
The choice of grinding wheel grain size affects the surface finish and grinding efficiency of workpiece machining; Generally, as long as the surface finish of the workpiece is satisfied, we can choose the one with relatively coarse particle size to save time
