EXOPRO® WHO-Ni Drills (5950Ni)

The Ultimate in Drilling Performance for Hardened Steels and Nickel Alloys


The EXOPRO® WHO-Ni drill series is OSG's premium performance drilling line for processing Ni-Alloys and Heat Resistant Super Alloys like Inconel 718. With the addition of the new DUROREY coating uniquely engineered for high-hardness steels, high chipping resistance is made possible even in work materials exceeding 60 HRC, allowing long tool life and high speed milling. Lower helix angles increase point rigidity while internal coolant holes further aid in heat resistance and stable chip evacuation in holes up to 5X diameter.



Outstanding performance in high-hardness steels

Lower helix angle

Lower helix angles create stronger cutting faces, essential when cutting Ni-Alloys and hardened steels.

Internal coolant holes

Coolant delivery at the cutting edge reduces heat and improves chip evacuation, thereby increasing tool life and enabling faster drilling speeds.



List 5950Ni - EXOPRO-WHO-NI View Offering >   View Overview >

List 5955Ni - EXOPRO-WHO-NI View Offering >   View Overview >



Nickel Alloys (Inconel, Waspaloy), Heat Resistant Super Alloys, Hardened Steels 40-55HrC


Holes up to 3X diameter in depth, where coolant-through is an option.


Any application where productivity and the lowest cost-per-hole is the goal.

Application Guide

ISO Work Material Recommended
P Low Carbon Steel : 1010, 1018
P Medium Carbon Steel : 1035, 1045
P High Carbon Steel : 1065
P Alloy Steels : 4140, 4340
P Die Steels
M Stainless Steels : 300
M Stainless Steels : 400
M Stainless Steels : 17-4PH
K Cast Iron
N Aluminum : 6061, 7075
N Aluminum : Casting
S Nickel Alloy : Inconel
S Titanium : 6AL4V (30HRC)
H Hardened Steels : ~35 HRC
H Hardened Steels : 35-45 HRC
H Hardened Steels : 45-50 HRC
H Hardened Steels : 50-70 HRC

good best

Speed & Feed Calculator

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