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bandsawparts.com

Coolants, Lubricants and Cutting Fluids

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Band saw cutting fluid or lubricants can make band saws even more useful than they are. Saw blades can quickly overheat, distorting whatever we are cutting and even damaging it. Cutting fluids can be applied while cutting the material to avoid blades getting too hot so blade teeth stay cool and prevents the chips from welding to the tooth. Fluids also lubricate the chips, allowing them to be removed from the gullets and move easily through the cut.

 

If cutting fluid is unable to cool the blade teeth, the teeth will soften and become dull. If the cutting fluid is distributed to only one side of the blade, the opposite side will become dull too. This will cause the blade to move toward the side which has the most cutting fluid and the cut will be crooked. The chip must lodge in a small place between the teeth and be carried smoothly out of the cut. Without proper cutting fluids, either one of two things will happen.  First, the chip may become welded to the tooth and this will result in a change of the shape of the tooth, which in turn, will change the amount of force required for our blade to cut.  This also results in an unbalanced blade which will produce a crooked cut. The second possibility is that the chip will wedge in the cut.  Since the chip is work-hardened and harder than the stock from which it came, the blade will cut into the stock beside the chip.  Again, the result is a crooked cut and a dull blade.

 

Cutting fluid is important and it cannot be stressed enough.  A good quality cutting fluid in a band saw is one of the most important factors in straight cutting. Choose the right cutting fluid to help you improve the cut and also improve the life of your saw blades. It is necessary and is a must for you to use the cutting fluid whenever you are cutting through metal.

 

When selecting a cutting fluid, pick one which is of high quality you can find.

 

There are four main types of cutting fluids which are available in the market today. These feature different properties which make them ideal for cutting through different materials.

 

Synthetic Fluids - These fluids do not contain any oil based products and are actually made from compounds. They include additives which prevent corrosion and are normally used diluted. Synthetic fluids offer the best cooling when compared to any other cutting fluid but they are some of the most expensive.

 

Example: 5250 Blue Star Synthetic Sawing Fluid which is translucent blue, water soluble, synthetic sawing fluid; designed to be a moderate to heavy duty sawing fluid where long life of the coolant is desired. 5250 can also be used in all machining operations.

Dilution

  • 1:7 for sawing applications
  • 1:20 for general machining
  • 1:10 for grinding uses

Semi-synthetic cutting fluids – These are a mixture of both synthetic and soluble cutting fluids and share some of the characteristics with these. They are also cheaper than synthetic fuels.

 

Example: 5030 is translucent, water soluble, sawing fluid designed to be a general purpose sawing fluid. 5030 can also be used in all machining operations. This one is good sump life and operator acceptance and is also easy to maintain and control. Waste treatable using standard fluid treatment procedures and systems.

Dilution

  • 1:7 for sawing applications
  • 1:20 for general machining
  • 1:10 for grinding uses

And 5040 Semi-Synthetic Sawing Fluid which is a translucent pink, water soluble, sawing fluid designed to be a general purpose sawing fluid where long life of the coolant is desired. 5040 is also able to be used in all machining operations.

Dilution

  • 1:7 for sawing applications
  • 1:20 for general machining
  • 1:10 for grinding uses

By Ylaina and Jen Gitgano

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  • Jim Goldsbrough

    Very interesting and informative.
    We at Magnus Chemicals develop and manufacture high end coolants, I would agree with most of the comments above, however I would say that a lower concentration could be used for grinding compared to general machining. Grinding typically requires more cooling that slip additives, as a general rule I would say you could go as low as 30:1 for grinding applications.

    • Gadbois

      Thanks for the information Jim. Good to know and we appreciate your time to share your knowledge and experience.