Some models will also shut off automatically when the grind is complete. Grind in short bursts no more than a few seconds. To get the grind you need, you might buy a small amount of coffee from your specialty coffee shop like Wild Goats and request the grind that would be right for your brewing equipment. Then you can go home and grind beans in your propeller grinder to match that grind. Remember, grind times will vary based upon the amount of beans you use at any given time so keep this amount constant.
Many people use their propeller grinder for spices in addition to coffee.
This will help remove extract residues from both spices or flavored coffees. However, it would be better to have a different grinder for each. Residues from either can still remain behind and affect the flavor of your drink. The fineness of the grind of your coffee increases the time of your brewing cycle. The finer the grind, the more slowly water passes through the coffee.