oil-hole drill

oil-hole drill

[′ȯil ‚hōl ‚dril]
(design engineering)
A twist drill containing holes through which oil can be fed to the cutting edges.
References in periodicals archive ?
Insert Bar Single-point Threading Process Coolant Flood RPM 900 Tool Life 55 parts Cycle Time 16 seconds Drill .15 [phi] x .60" deep Solid-Carbide Oil-hole drill 1500 psi CTS 3000 .0032 IPR none 2100 holes 4 seconds Drill l/2" [phi] x 1.4" Solid-Carbide deep Oil-hole drill 1000 psi 1500 .0065 IPR none 1100 holes 10 seconds 9/16-18 x .65" deep Internal Threading Internal Thread.
Solid carbide oil-hole drills and boring tools were implemented causing up to 1000 percent cost increase per tool, but due to longer tool life, the overall tooling cost per workpiece stayed about the same, while cycle times and part quality improved dramatically.
While more costly on initial purchase than solid drills, oil-hole drills can achieve 4X reductions in cycle time, making them highly cost-effective on a unit basis.