1. home
  2. preface
  3. razor parts
  4. blade points
  5. razor identification
  6. the edge
  7. grinds
  8. grinds, why
  9. sharpening introduction
  10. stones
  11. strops
  12. using stones, introduction
  13. blade - stone geometry
  14. first stroke on stone
  15. last stroke on stone
  16. using the strop, introduction
  17. first stroke on strop
  18. last stroke on strop
  19. preparation for shave
  20. numbered shaving paths
  21. face, right side
  22. face, left side
  23. chin
  24. coup de maitre
  25. throat
  26. second over
  27. preface to archives
  28. La pogonotomia I
  29. La pogonotomia II
  30. La pogonotomia III
  31. La pogonotomia IV
  32. the razor I
  33. the razor II
  34. the razor III
  35. the razor IV
  36. the razor V
  37. the razor VI
  38. references
  39. summary
  40. guestbook

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     ©1998-2003 Arthur E. Boon



























































































The Razor IV

The grinding wheels

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The cutting stones have diameters of 110-120 mm, 140-150 mm, and 170-180 mm for 3/8", 4/8", and 5/8" blades, respectively. Their function is to create the straight edge, the back, and parallel back-edges. The pre-grinders have diameters of 75-80 mm, 95-100 mm, and 105-110 mm, respectively. Their function is to create the concave thinning of the blade between the belly and the edge. This represents the � hollow grind phase. The post-grinders have diameters of 50-55 mm, 60-65 mm, and 75-80 mm, respectively. Their function is to strengthen the edge and the thin part directly above it, and to creat the belly. The hollow grinders have diameters of 26-30 mm; 32-35 mm; and 36-41 mm, respectively, and they have a half round profile. Their function is to dig into the blade. The blade is put on the half round profile, in the length direction of the blade, about 2/3 next to the back.

Rule: the position of the sole determines the grade of hollow grind (1/4, �, � or 1/1, for positions directly above the edge to halfway towards the back, respectively - of course, between sole and edge there is always the wall).

After using the cutting stone to create the edge, the edge is honed under a direction of 45 degrees, to strengthen the edge and prevent any further forming of burr. The 45 degree angle is reset later at the sharpening hone.


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