Whenever you go into a machine shop, look at the emery wheel.
Basils for gaiters are dyed in paddle and fluffed over the emery wheel.
In Fig. 677 let a represent a reamer and b a segment of an emery wheel.
The emery wheel should be of a grade of not less than 60 or more than 70.
If it is at all tight, grind it on the rim by means of an emery wheel or a grindstone.