diamond grinding wheel wear problems

Diamond Wheel inevitable after prolonged use wear and damage , this time we need to staff promptly replaced , here we sds hammer drill bits  come briefly under diamond wheel replacement note:
Wear problems :
Any wheel has its use wear certain requirements to achieve a certain degree of wear must be re- replacement of the grinding wheel . Not in order to save material , it requires the use of masonry drill bits  ultra- wear , which is a very unsafe violations . General rule, when the wheel wear to chuck diameter than the diameter of 10mm, it should be replaced with new wheel .
Valid question: from the Treasury brought out a new wheel is not necessarily qualified wheel, or even buy a new wheel from the factory are not necessarily qualified wheel . Any wheel has its certain expiration date, the expiration date of use, it is qualified wheel ; than valid to use , it is not necessarily qualified wheel . Statutes provides that " wheel should be used within the validity period , resin and rubber bonded grinding wheel storage after one year must be approved by rotation test , those  bandsaw blades who pass before using ."
Texture questions:
During use , if found partial wheel cracks should immediately stop using and re- replacement of the grinding wheel , grinding wheel to avoid crushing injury accident .