Milwaukee thunderbolt cobalt drill bits portable#
Milwaukee thunderbolt cobalt drill bits professional#

Milwaukee thunderbolt cobalt drill bits portable#

Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills. The MILWAUKEE RED HELIX Cobalt Drill Bit is engineered for extreme durability and longer life in hard metal applications. A precision start, 135 Split Point tip starts on contact to keep the bit from walking for fast accurate holes. A specially designed parabollic flute form clears chips and debris fast to keep the bit cool. The Thunderbolt web features a thicker core than a standard drill bit, which provides ultimate strength and protects against side-load breakage. With a thicker core than standard bits and a parabolic flute design that expels debris and chips quickly, these Thunderbolt Cobalt Drill Bits from Milwaukee are engineered to efficiently bore holes through high alloy steel, stainless steel and cast iron in addition to wood and plastic. The drill bits have QUADEDGE TIP to decrease heat buildup and drill. The Milwaukee Cobalt drill bits are designed with a VARIABLE HELIX that includes an aggressive 35 degree Helix Angle which ends at 15 degree. Milwaukee 48-89-2331 15-Piece Cobalt Red Helix Secure Grip Drill Bit Set w/ Hard Plastic Foldout Storage Case. Drill Bit are engineered for extreme durability and longer life in hard metal applications. 4.8 4.8 out of 5 stars (415) 100+ bought in past month. Milwaukee Thunderbolt Cobalt drill bits are designed for extreme durability and long life in specialty applications. Milwaukee 48-89-4680 18-Piece Shockwave Impact Duty Thunderbolt Titanium Drill Bit Set w/ Anti-Walking 135 Degree Angled Tip and Storage Case.

Milwaukee thunderbolt cobalt drill bits professional#

Some argue that the standard 118-degree point is wrongly assumed to be a good compromise for general-purpose drilling in a variety of different metals. Drawing from the professional drilling industry, Milwaukee has chosen to go with a more advanced split drill point and flatten the angle out to 135°.Product Description Milwaukee 48-89-2329 - Thunderbolt Cobalt Drill Bit 1/2' In the past, drill point standards have been accepted based on precedent, rather than logic and design innovation. Because all tested bits shared the same 135° split-tip, we attributed the speed gains to the chip breaker. With Milwaukee cobalt bits we drilled through 1/2-inch plate steel in 30% less time than with other cobalt bits. I was really impressed with the smooth cutting action. In a test of the variable helix design at the PTR Labs, we were able to repeatedly bore 1/2-inch holes over 5-inches deep in pressure-treated pine without any binding or argument from the bit. Quicker waste removal reduces friction and heat that dulls bits and leads to binding and the despicable experience of snapping off a drill bit in your workpiece.

The design pulls waste out of the hole at a quicker rate and with fewer rotations of the bit. Milwaukee Cobalt RED HELIX Drill Bits are engineered for extreme durability and long life in hard metal applications. (1) 5/32 Milwaukee Thunderbolt Cobalt drill bit, (1) 3/16 Cobalt Red Helix.

These bits start with a tight 35° twist on the helix at the tip and then spread out to 15° at the base. the Cobalt bits with Red Helix provide rapid Chip Removal limiting heat. Typical twist drills have a standard helix with the flutes being uniform all the way down the shaft. Not true of both the Titanium and Cobalt Red Helix bits. You can find other cobalt and titanium bits, but this feature is truly innovative. In my opinion, here lies the real genius of this tool. Milwaukee Red Helix Bits: Design and Innovation Variable Helix Sharpen these bits, and you lose the benefits of the titanium coating. Bits with a titanium coating are better for general purpose drilling in softer surfaces since the coating is only on the surface. This means you can sharpen these bits without losing any performance. Despite this, cobalt (really a steel alloy with 5-8% cobalt) works better for drilling metal due to its high resistance to the massive heat generated when drilling through highly abrasive materials.Ĭobalt bits are great for high production rates as the cobalt is found throughout the entire material. They also do better resisting to corrosion. It’s worth noting some pros and cons of both materials. TiN-coated drill bits are actually harder than cobalt and more slippery to reduce friction.