Tech Support

 
TROUBLE SHOOTER - END MILLS
 
PROBLEMS

Poor Workpiece Finish
Chatter or Similar Noises
Splintering of Workpiece
Edge
Non Parallel or
 Uneven Surfaces
Poor Chip Clearance /
 Chip Clogging
End Mill Breakage
Extreme Flank Wear
Extreme Crater Wear
Breaks and Shelling Due to Thermal Shocks
Built up Edge
Lack of Rigidity
SOLUTIONS
Increase cutting speed
     
     
 
Reduce cutting speed  
       
   
Increase feed rate        
 
   
 
Reduce feed rate
 
 
 
Reduce cutting depth
 
 
 
 
Change cutter dia. And cut width        
       
Check the use of cutting oil, wash swarf away
   
 
 
 
Increase clearance angle (radial relief)    
Increase wedge angle (rake angle)    
       
   
Increase no. of teeth
 
               
Reduce no. of teeth      
       
Select Larger Chip Space        
           
Change shape of minor cutting edge
 
   
 
   
Change radial run-out      
       
   
Change cutter stiffness, flute length (I/D ratio)    
 
 
 
Select Machine with higher power and stiffness    
       
 
Increase Helix Angle
                   
Check workpiece setup  
     
 
   
Check Tool setup  
     
 
   
Reduce Overhang  
     
 
   
Check spindle play  
     
 
   
Try climb milling  
         
     
 

TROUBLE SHOOTER - DRILLS
 
PROBLEMS

Breaking of Drill
Outer Corner Break Down
Cutting Edge Chips
Lands Chip
Drill splits up centre
Drill will not enter work
Hole surface is rough
Oversized Hole
REASONS
Dull Point
Drill has front taper due to wear
Insufficient lip clearance on point
Lip clearance too high
Drill point incorrectly ground
Chip clogging
Spring or Backlash in drill press, fixture or work
Feed too heavy
Cutting speed too high
Improper cutting oil flow on cutting edges
Hard spots in worpiece material
Oversize jig bushing
Drill core dia. too big
Fixture / Clamping not rigid
Unequal angle / Unequal length of cutting edges
Spindle run out

 

   
 

End Mills

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