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Are HSS drill bits any good?
HSS bits are hardwearing and heat resistant. The large concentrations of chrome and nickel in stainless steel ensure that HSS bits are super strong and durable. HSS drill bits are capable of safely drilling through hardwood, some metals and plastic.
What is the best drill bit made out of?
Clearly the best drill bits for hardened metal or steel come with a cobalt blend. These cobalt drill bits use an alloy including 5\%–8\% cobalt. This cobalt makes up part of the steel blend, so the hardness of the bit doesn’t wear off with a coating (like titanium bits). It runs throughout the entire bit.
What drill bits stay sharp the longest?
Milwaukee Tool has introduced SHOCKWAVE™ titanium RED HELIX™ Impact Duty™ drill bits and cobalt RED HELIX drill bits. Engineered to stay sharp longer, the bits feature a Variable Helix™ flute geometry for fast material removal, a Chip Breaker™ to decrease heat buildup, and a 135-degree split point to prevent walking.
How hard is HSS?
16.1. The alloying elements raise the temperature at which tempering occurs, allowing HSS to be used at temperatures up to about 650°C. Their hardness is limited to 750 HV, adequate for machining most of the common metals, including alloy steels in their unhardened forms.
Can HSS drill bits be used for concrete?
High speed steel (HSS): High-speed steel is widely used for general purpose drilling. Carbide is also expensive, so tool manufacturers often use HSS for the shank, flutes and leads but add a piece of carbide to the point. Carbide tip bits are popular for masonry, concrete and tile drilling.
What grade of steel is HSS?
Combining molybdenum, tungsten and chromium steel creates several alloys commonly called “HSS”, measuring 63–65 Rockwell “C” hardness. M1 lacks some of the red-hardness properties of M2, but is less susceptible to shock and will flex more. M2 is the “standard” and most widely used industrial HSS.