Sharpening Stone/Oil Stone/Abrasive Stone

Sharpening Stone/Oil Stone/Abrasive StoneThe combination sharpening stone with one thick-grit-size face for rough grinding and the other fine-grit-size for finishing,such an sharpening stone is made of the black and green silicon carbide,brown Alumina oxide and white Alumina oxide with the Vitrified bond.The combination sharpening stone has got the advantages of easy carrying,quick sharpening, suitable hardness and long life, it can be used for grinding all of various manual cutting tools. Information providedOur factory has obtained ISO9001 Quality Certificate and we empoly an engineer which retired from Norton Company to control the producing and quality.1. The temperatureof burning the sharpening stones in the kiln:1300 degrees Celsius.2. Providing the range of grain size: From 16# to 600#.3. The finest grain could be producted: 600#.4. The steps of produce hardness andthe tolerances are allowed:The softest is F and the most hardness is Y. The tolerances of the hardness is 1.5. measure hardness?:Use hardness tester.6. The tolerance of hardness from F to E is 1°,and it can’t be accepted more than 5°7. Test hardness with grits coarser than 100 (FEPA grit size):Use Rockwell hardness Testing machine.8. Compare the hardness of our sample :Tested by the hardness tester.9. Finishing procedures: cutting, face grinding, grinding10. The way of packing:The packing method is carton.We can according to your requestment to pack.