Various bur drilling techniques #5 =>4 diagrams

Where would you place your HSS bur? The answer is in this essay. THERE COULD BE MANY ERRORS IF THE FOLLOWING STEPS ARE IGNORED.

  After you prepare the seat for your square stone, it obvious that you should remove the outside edge of the wall. This will allow you to hammer over the stone with much less metal. See my drawing!

                                       

  Allow the edge of the rotating bur to cut into the wall of the opening.

You are allowing both the 'upper and lower teeth' of the bur to cut into the metal. This will allow both the Crown and Pavilion facets to sit properly.

  When you are doing your burring for seats, do yourself a favour and make sure that the bearing is equal all around the opening. 

 The next important step is to taper the opening to accommodate the Pavilion of the stone; see my drawing for this important step.

 DO NOT (EVER) SPEED UP THE REVOLUTIONS OF YOUR BUR. If you do, you might lose control of the quickly rotating bur.