Holes that qualify as âdeep-hole drilling are three or more drill bit diameters. deep. When drilling this deep, the speed and feed rate must be adjusted to. reduce friction. Friction creates heat, and heat build-up in the drill bit can cause. failure and breakage. Lubricants help dissipate heat from the tip of the drill bit, prolonging drill life, and should always be used when deep-hole drilling.
A common misperception is that this peak is the highest in Arizona because you unable to see Humphry's Peak behind it from Flagstaff, Arizona. It's summit is 12,356 feet above sea level. The mountain is closed to climbers in winter due to snow and protecting the fragile tundra enviroment.
Pikes Peak is NOT the highest mountain in Colorado. It is 31st out of the 54 mountains in the state over 14,000 ft, the highest being Mt. Elbert at 14,433 ft. In fact, the altitude of Pikes Peak has changed many times over the years.