Operating with Fdrill - Short Introduction 
Necessary equipment: 
-  All you need is a column drilling machine or a CNC work station with sufficient power from 0.5 每 5.0 kW and spindle   speed from 1000 每 5000 Upm (see our practical guide page 14). 
-  Special tool holder MC 2 or MC 3 with cooling disk  and special collet should be used to avoid an overheating of the spindle and to assure, that the Fdrill is spanned correctly.  
Choice for the right Fdrill flow punch former: 
-  The diameter of the Fdrill flow punch former de pends on the size of the thread or bearing bush which shall be produced .To produce a M 8 in  mild steel, you need a 7.3 mm  centerdrill. In  stainless steel, a 7.4 mm flow punch former is needed. For all sizes bigger than M 6 you should always use a 0.1 mm thicker diameter of the centerdrill for stainless steel  (see our practical guide page 15). 
-  If the metal is thicker than 3 mm, it can be better for the life time of the thread former, to use a 0.1 mm thicker diameter of the Fdrill.  
-  According to the thickness of the metal, either a short or a long former (see our practical guide page 15) is preferred. 
-  If the surface of the metal shall be flat, you take a center drill flat, which cuts off the  rim or collar. If you want a surface with collar, use the standard Fdrill. 
The process: 
-  When the Fdrill is fixed in the tool holder and co llet and the machine runs at the requested speed, the  process is started by bringing down the spindle with the Fdrill smoothly and stopped at 0.1 每 0.5 mm above the metal piece.  
-  Then the spindle is pressed down with a feed rate  of approx. 150 mm per minute until the hole is formed. It takes only 2 每 4 seconds to form a hole for a M 8 in 2 mm thick material for example. 
-  When the hole is formed, the spindle with the Fdrill  is lifted and it can be continued with the next hole.
- If you form a hole with a collar, the Fdrill is pressed down smoothly during the last 0.8 每 1.8 mm and stops  according to the height of the collar.  If you want a flat surface without collar, the Fdrill is pressed down with a higher feed rate during the last 0.5 每 1.5 mm. The higher feed rate ensures that the collar flies away.
The process ends on the surface of the metal. 
-  The metal part must be clamped securely, so that it  cannot move either vertically or horizontally. 
-  After 5 每 10 holes. It is recommended to apply our paste,  which prevents metal build up on the Fdrill. 
- For thread-forming we recommend our lubrication oil, which should be applied after each thread forming  operation.  
-  To protect you against the collar that flies away, you s hould wear protective clothing or install a protection shield at the machine. 
-  Don*t touch the tool-holder or Fdrill without gloves after operating. These parts become very hot and you risk burning you. 
If you would like more information from our specialists, please don*t hesitate to contact us.  

Zhuzhou Fdrill Industry and Trade Co., Ltd. Address: Hetang District,Zhuzhou City, Hunan Province, China
Tel :+86-731-22960026 Fax :+86-731-22961166 Website:

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