Coldsaw blades - also know as; HSS blades, HSS Circular Saws, Brobo saw blades, cold cutting blades are great blades for all metal cutting. The Coldsaw blade is old technology that has been used successfully for over half a century and is used on slow rpm circular machines primarily for tube cutting.

Although cutting on a coldsaw machine may seem simple - here are 7 things you must be aware of:
  1. Feeding speed and cutting speed depends on the cutting material section and toughness. For stainless steel, which is difficult to cut and has high toughness, the consequent reduction of feeding is very favourable to improve the service life of the saw blade.
  2. In order to ensure a longer service life of the newly installed high-speed steel
     (HSS) saw blade, it is best to let the circular saw machine and the new blade (replacing or re-sharpened HSS saw blade) have a sufficient running-in process, it is necessary to reduce the normal feed rate by 50% in the first 10 minutes of the cutting, and then slowly back to normal feed rate in following 10 minutes of use. When the material section is small, it can appropriately increase the machine speed. 
  3. If the cutting speed is increased for same materials, better to select a corresponding blade with coarser teeth. 
  4. It always requires an effective cutting angle and effective pitch during cutting, re-grinding the saw blade correctly and timely can help the high-speed steel saw blade to maximize its effectiveness.  Check out our CBN wheels for grinding.
  5. By observing the metal swarf, you can find the current cutting state of the saw blade 
    1. Cutting pressure is high while swarf is tiny or powdery. 
    2. Swarf are thick but soft, indicating overloaded cutting. 
    3. Swarf are long and rolling means good cutting condition. 
  6. Keep cutting area clean of swarf by using compressed air, a swarf remover or a thread- free cloth. 
  7. Last but not least - Use Flood coolant! This should probably be point number one as it is very critical for 3 reasons:
    1. Cooling - It keeps the cutting cool which reduces friction, wear and also chip welding.
    2.  Lubrication - due to oil content in the coolant (make sure you add this - see here) the blade will be lubricated which will reduce friction and extend blade life
    3. Chip removal - the coolant helps wash away the swarf which is critical to extending the blade life. 

I hope these help you overall with using coldsaw blades - to learn more

By Jason Thomas

Published Sep 4, 2020 07:35 AM