![]() These are all solvents and as such will strip the lubricant out of the bearings and will void your saw warranty. Some old timers will argue that coolants like diesel, kerosene or fuel oil with a little bit of oil is fine. The thick oil and sludge acts like a shield between your blade and the rock resulting in high blade pressures and low cutting performance. It is basically is like hydroplaning of car tires on a road. The reason being is that the viscosity of the oil is too thick and the oil and sludge builds up and can't get out of the way of the blade so blade pressure goes way up but the cutting is poor because the pressure on the diamonds against the rock is low. Likewise if you run a high viscosity mineral oil like the TSC mineral oil for livestock or other food grade mineral oil (which we are not fans of) you saw will cut poorly. Your blade will immediately become dull and the blade pressure will increase with little to no results. If you are cutting hard material like Mookaite, petrified wood or other hard agates and jaspers, water based coolants will simply will not work. Our first question is always “what coolant are you using”. Usually these calls start happening in September. We sometimes get calls from people saying their saw is not cutting properly or not cutting at all. All this was accomplished by simply changing the coolant. Simply by changing out the coolant, the same drill with the same bit was able to drill 6 inch diameter 6 inch long cores in rose quartz in less than 8 mins. We shipped over 5 drums of coolant that we use which is a low viscosity, high flash point, commercial mineral oil used in cosmetics which has a viscosity close to that of water. The only difference was the type of coolant being used. We looked at all the mechanical issues, diamond core bit, and the overall functionality of the core drill and everything looked just fine and exactly the same as what we run our our China and Philippine cutting facilities. They had drilled for about 40 mins and only gone 1/2 inch deep. In this particular case they were using a 6 inch diameter bit attempting to drill 6 inch long cores in rose quartz. We were reminded of this recently when one of our customers in Madagascar was drilling rose quartz using our core drill they had purchased a mineral oil that had a higher viscosity that is very similar to the food grade oil that a large majority of our customers are attempting to use. ![]() The type of coolants you use to run your equipment in critically important to cutting performance.
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