Drilling Oil and Air-Bleed Holes

Engine, transmission and drive train components must be extremely robust yet as small and lightweight as possible.

To get the most from these components they need proper lubrication and fluid flow properties. Holes around 0.5mm diameter in iron and aluminum alloys do the job very well. However, these hole sizes can’t be produced economically and consistently with conventional twist drills because they break too easily.

4mm machined steel and high-strength steels parts, castings, forgings, hardened steel parts, and even parts with polymer-seal coatings are all easily Laser drilled using a simple redPOWER CW Fiber Laser to maintain good hole quality and drilling speeds.

Most of these holes use a technique called percussion drilling. The Laser’s focus spot is set so it produces the correct hole diameter and a burst of Laser pulses produce the hole without any motion.

For holes larger than about 0.7mm, a technique called trepan drilling is needed to perform a static pierce followed by the motion to ‘cut’ out holes.

redPOWER CW Lasers produce the pulse energy and peak power for efficient drilling. Coaxial air or oxygen is used to aid in the drilling process and to keep the optics clean.


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