Drilling Inconel 718
Drilling Inconel 718
(OP)
I have to drill 1.0 mm dia. holes x 4 mm deep in clean faced Inconel 718.
The drill will be held in a driven tool station on a CNC lathe.
Could anyone advise a suitable drill type with cutting data.
The Wormturner.
The drill will be held in a driven tool station on a CNC lathe.
Could anyone advise a suitable drill type with cutting data.
The Wormturner.





RE: Drilling Inconel 718
This size hole is extremely tough but doable. It is best to use coated carbide drills with a 150 degree included angle and a split point. Use a TiAlN coating or better for this material. Speed 35-45 SFPM, .002/.003 ipr. If you cannot get a good quality carbide, M42 will work and this must be coated with TiAlN.
RE: Drilling Inconel 718
We had tried a few suppliers. The best quality and price we found were the drills made by Guhring. They have a large selection of types and sizes.
Check with your local distributor for a Guhring catalog.
When it comes to small diameter holes, it will take also lots of patience, trial and error, until you find the right parameters for your application. The general guidelines from the books don't seem to apply for those small holes.
RE: Drilling Inconel 718
RE: Drilling Inconel 718