Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
HP <strong>Solid</strong> <strong>Carbide</strong> Deep-Hole <strong>Drills</strong><br />
for Steel, Cast Iron, and Non-Ferrous Materials<br />
Primary Application<br />
B27_HPG Series <strong>Solid</strong> <strong>Carbide</strong> <strong>Drills</strong> are the optimum platform for drilling holes up to 30 x D in steel,<br />
cast iron, and stainless steel materials. Drill deep holes up to 4x faster than conventional HSS<br />
and gun drills. Application of MQL is possible.<br />
The B27_HPS in the new uncoated KN25 grade now offers the same advantages for drilling in non-ferrous<br />
materials such as aluminium, copper, and brass. These series are now available from 2,3–16mm (.09–.63")<br />
diameter and in lengths from 15–30 x D.<br />
Features and Benefits<br />
HP Drill-Point Design<br />
• Low thrust.<br />
• Excellent centring capabilities.<br />
• Highest possible feed rates.<br />
Four-Margin Lands<br />
• Improves hole straightness.<br />
• Improves hole alignment when drilling through cross holes.<br />
Unique Flute Design<br />
• Drastically improved chip evacuation.<br />
• Better hole surface quality.<br />
KC7425 Grade (B27_HPG)<br />
• A multilayer, AlCrN-TiSiN PVD coating provides outstanding wear resistance.<br />
• New ultra-fine-grain carbide ensures process reliability at high feed rates.<br />
KN25 Grade (B27_HPS)<br />
• The uncoated grade helps to prevent built-up edge when drilling aluminium and high-temp alloys.<br />
• The highly polished surfaces of both grades ensure superior chip evacuation, even when low-pressure<br />
coolant or MQL is applied.<br />
Customisation<br />
• Intermediate diameters available as semi-standards.<br />
• Length variations — including even longer versions — available as engineered solutions.<br />
www.kennametal.com G51
Change language