Bandsaw Coolant Mixtures and how to extend the life of a bandsaw blade include such things as the proper handling of saw blades, using the correct operating procedures, and more specifically, choosing the right coolant. These will all work to result in a smooth, more satisfying cutting process.
Metal Working Fluid (MWF) — also referred to as cutting fluid, cutting oil, cutting compound, coolant, or lubricant — can range from straight oils (petroleum oils) to water-based fluids including soluble oils and semi-synthetic/synthetic fluids.
MWFs may be complex mixtures of oils, emulsifiers, anti-weld agents, corrosion inhibitors, extreme pressure additives, buffers (alkaline reserve), biocides, and other additives. Also things like animal fats, plant oils, water and air, or other raw ingredients.
The type of coolant used should be one that is designed specifically for the metalwork machining process to be implemented.
Most metalwork machining processes benefit from the use of cutting fluid. The choice of fluid will depend upon the material being worked. Common exceptions to this are when cast iron or brass are to be machined. Neither of these materials need fluid for smooth operation since both are machined dry.
The properties of a good cutting fluid are meant to help keep the work piece at a stable temperature — a critical issue when working at close tolerances. Very warm is okay, but extremely hot or alternating hot-and-cold are what need to be avoided.
In order to maximize the life of the bandsaw blade cutting tip, it is vital to lubricate the working edge and reduce tip welding. It also aids in the prevention of rust build-up on machine parts and the saw blade.
There are four main groups of coolant available in different formulations.
Oil Soluble
This type of coolant contains 60-85% mineral oil and emulsifies in water
Semi-Synthetic
A type of coolant that contains 5-50% mineral oil and also emulsifies in water
Full Synthetic
This type of coolant is of the highest quality and does not contain any mineral oil
Straight Oils
A coolant with about 70-85% mineral oil and does not emulsify in water.
Using the right MWF will guarantee a successful cutting process by keeping the bandsaw blade cool and lubricated during use, which helps to maintain and prolong the life of the saw blade.
