Coolant and lubrication in gun drilling machine

In multiple spindle drilling machine, the coolant &lubrication oil has a big influence towards the deep hole gun drilling machine processing quality and processing efficiency. According to the characteristic of internal chip removing deep hole drilling machine, the requirements are as follows:

1) use the low pressure big flow coolant and lubrication method when use the indexing gun drilling machine. Because of the big feed volume processing, the cutting chips will be more in a certain period, the cutting temperature will be high. So the remove of the chips and lubricating of the gun drill bits are very important. 

2) Use the grease cutting oil. When deep hole drilling, there is axis force and friction force of carbide drill bits’ guide sleeve, if the coolant is poor, the wearing capacity of the guide sleeve will be big. If choose the extreme pressure cutting oil, there will be a lubrication film to lubricate and support the guide sleeve. It will largely reduce the wearing capacity of guide sleeve and prolong the life service of the gun drilling tools.

3) Keep a clean lubricating oil. Because the dirty coolant and lubricating oil will break the lubricating film, or block the small hole diameter oil path. So the filtration of coolant oil is very important, and we can do the rough filtration at first, then precision filtration.

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