HY-PRO® CARB Drills (HP255)

Performance Carbide Coolant Drills for a Variety of Materials & Applications


The HY-PRO® CARB carbide drill series is an ideal blend of performance and cost-efficiency. Strong radial rake combined with precision point geometry and WD1 coating makes this drill extremely versatile in application. Be it solid or coolant-through, these drills yield incredible performance at depths from 3X to 8X Diameter.


Negative Radial Rake

Stronger cutting edge to resist chipping

Refined honing on cutting edge

Provides more consistent performance from the first hole to the last hole

WD1 Coating

Multiple layers provide superior resistance to thermal cracking from heat, versus other mono-layered coatings

DIN Shanks (6, 8, 10, 12, 14, 16, 18, 20mm)

Larger shank provides more rigidity and minimizes the number of holders/collets needed to accommodate all sizes

Internal coolant holes

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

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



List HP253 - 3xD Length, Coolant Thru View Offering >   View Overview >

List HP255 - 5xD Length, Coolant Thru View Offering >   View Overview >

List HP258 - 8xD Length, Coolant Thru View Offering >   View Overview >

Alternate Products

List HP243 - 3xD Length View Offering >   View Overview >

List HP245 - 5xD Length View Offering >   View Overview >



Cast Aluminum, Cast iron, Carbon Steels, Alloy Steel, Die Steel, Stainless Steel, Hardened Steel <45 HRC


Performs especially well in stainless steels


Any application where currently using a 2-flute coolant-fed drill


Additional Information

When grinding or regrinding industrial cutting tools, residual grinding dust may occur. This dust may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.P65Warnings.ca.gov