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My 12 speed press has been set to its slowest speed, about 200 rpms, for 20 years. That works for any type of drill, for wood, plastic, carbon steel or stainless and I rarely use any type of cutting fluid. All those charts that say thousands of rpms are made for manufacturing environments. They have reasons for specifying different speeds for different materials that have nothing to do with how we use a drill press. So, follow their guide lines if you want to but you'll break or wear out many more drills if you do it that way. Slow is safe and it works just fine if you use fresh sharp drills ...
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