How to modell a through coolant drill bit in solidworks?

what are the design criteria should i have in order to model a drill bit in solid works. Im doing a project on it, it would be so helpful for me to know it.

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I think first is inflexibility. but you should think about material what you drill

 
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It's ideal that you determine a quantity of coolan fluid for specified diameter of drill bit.
Usually you must drill a small hole thru drill bit , best thru drill bit axis but if you have a long drill bit it can be problem.
Pressure and quantity of coolant fluid must be sized that you have not a reminding a cutted parts in a hole - as people do in offshore industry.
Also you must have a special head for connecting that kind of drill bit.

 
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