Pilot Bit

• Before beginning the cut, place a piece of duct tape or masking tape
  
• over the area to be cut. This will keep the pilot bit from “dancing” across the porcelain.
  
• Be sure the size of the tape is smaller than the inside diameter of the finish saw
  
• being used.

Porcelain Saw

• For best results with the spring-loaded saw, use a slow RPM when
  
• scoring the porcelain. Typically a good range would be 300 RPM for
  
• the 7/8" diameter and 100 RPM for the 1-3/4" diameter.

   

• Be sure that all of the cutters are in contact with the porcelain. This will help
  
• eliminate chatter and help avoid chipping of the porcelain.

   

• For longer life, score the porcelain only deep enough to see a “ring of gray” in the kerf.
  
• Be sure the ring goes all the way around in the cut. Otherwise chipping may occur.

Finish Saw

• Never use water or oil when cutting through cast iron.
  
• The mud that develops will wear out the carbide inserts prematurely.

   

• Use fast speeds and light pressure when drilling through the cast iron.
  
• This will allow for longer life and faster cutting. 1000 RPM is good for the 7/8" diameter
  
• and 500 RPM for the 1-3/4" diameter. If vibration is a problem, try a slower speed.

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