Is it necessary to drill pilot holes in advance for deep hole drilling by sharp work?

Recently some friends are asking

Is it necessary to drill pilot holes in advance for deep hole drilling?

Pilot hole: As the name suggests, it means "to lead and guide".

Simply put, it is to guide the drilling position correctly!

The traditional drilling method, because the drill is affected by the force of the workpiece at the beginning, it is easy to shift, resulting in a large drilling error, which can't meet the design tolerance range requirements.

Therefore, it is necessary to pre-drill a small hole in the center of the drilling position, so that the head of the drill can be drilled along the hole, to ensure that the force around the drill bit is uniform, to reduce the deviation.

This is one of the most important roles of the "guide drill"! 

Our deep hole drills are different from traditional drilling methods in that they are characterized by high precision, high efficiency and high consistency!

Both gun drilling and U-drilling can be done directly on the workpiece without the need for a center drill to make pilot holes!

Why is there no need for a center drill to drill pilot holes on a LeeGong Deep Hole Drilling machine?

That's because LEGO deep hole drilling machines use tungsten steel guide bushings, which function as a guide and stabilizer when drilling into the workpiece until the drill bit enters the workpiece completely, perfectly replacing the role of the guide drill!

Vertical deep hole drilling is also installed on the spindle of the machine tool with a practical U-shaped bracket developed by Ligong, whose function is to securely fit the workpiece, reduce the drill bit deflection, and make the machining more stable and more accurate!

The U-type bracket structure and the guide sleeve are compatible with each other, so that the positioning accuracy and repetitive positioning accuracy of the deep hole drilling can reach ±0.005!

Adhering to the business philosophy of "benefit oneself and born, benefit others and long, benefit the people and strong", Ligong equipment continues to research and develop high-efficiency, high-precision equipment required by the industry, with advanced manufacturing technology, perfect service system, to create greater value for customers.