GENERAL INFORMATION
————————————————————————————————————————————
Truing and Dressing
   If the periphery runout is severe when the grinding wheel is mounted, or if profile wear of the straight wheel or cup wheel is found, the runout and profile of the wheel must be adjusted.
 
   Truing is the procedure of adjusting the runout and profile of the wheel. If involves shaving off the diamond grits and the bond to correct the runout and the profile of the wheel.
 
    The diamond grinding wheel cannot be use immediately after the turing procedure as the diamond grits are not properly exposed: therefore, the wheel is not in prime condition to be used.
 
    To improve free-cutting ability, the bond must be dug out and the diamond grits exposed onto the surface of the wheel. This process is called "Dressing".
 
    Diamond grinding wheels cannot satisfactorily perform unless the above procedures are followed correctly.
 
 
Selection of Silicon Carbide Wheel for Truing
   In order for the truing of the diamond grinding wheel to be effectively performed a timely manner, the grit size of the silicon carbide truing wheel must be 2 grades coarser than that of the diamond grinding wheel. As shown below, the grade of the silicon carbide wheel must be relatively hard.
 
 
Truing Methods
Grit size of diamond grinding wheel
Stick for dressing
   There are four truing methods
   (1) Brake dresser
#80 or coarser
C46-M
   (2) Abrasive stick
#100 ~ #200
C60-M
   (3) Mild steel
#230 ~ #325
C80-M
   (4) Tool post grinder
#400 or finer
WA200-G
 
 
Selection of Dressing Stick
   Since the purpose of dressing the diamond grinding wheel is to expose the diamond grit by removing the bond only the grit size of the stick should be 2 grades finer than that of the diamond grinding wheel.
 
   
This table is a guide for dressing stick selection. One dressing stick or lapping stick is supplied with purchase of a grinding wheel
Grit size of diamond grinding wheel
Stick for dressing
#80 or coarser
WA120-G
#100 ~ #200
WA200-G
#230 ~ #325
lapping stick
#400 or finer
lapping stick
 
 
Dressing with Stick
   A diamond wheel is dressed by pushing the stick on the surface of the diamond grinding wheel by hand. Coolant must be used. In case of dry dressing, a wet stick should be used. When using a lapping stick, dry dressing is recommended.
 
Untitled Document