Cutting Tools Jobber Drill Bits Buying Guide
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Cutting tools driller bits are ideal for general purpose drilling applications. They can be used on a variety of materials including ABS, nylon, steel, aluminum, copper, brass, pine, oak, maple, MDF, PVC, polycarbonate, acrylic, composite materials, and common stainless steel.
Different Types of Drill Bits
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Metric drill bit sizes:Metric drill bit sizes propose the diameter of the bit in terms of standard metric lengths. Organizations that upkeep standards like British Standards use metric drill bit sizes.
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letter gauge drill bit sizes: Unlike standard measurements here you have to refer the table of gauge sizes every time you handle a drill bit.
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Center drill bit sizesare common in the US but metric sizes are preferred.
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Jobber length Drill Bits with titanium coating last six times longer than black oxide.
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Helix flute designs penetrates the material much faster (say three times) than standard bits.
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Special 135 degree split points begin cutting immediately upon contact. Thus, it eliminates the need for center punching. It also reduces feed pressure thereby enabling easier penetration without work hardening.
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Jobber length drill bits manufactured of cobalt high speed steel are ideal for abrasive resistance in tough metals.
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Drill bits with heavy duty spiral flute design generate faster chip ejection.
* Shorter cutting lips - they decrease torque for drilling in high tensile strength materials.
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Split point drills eliminate walking and also reduce thrust.
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Bosch cobalt drill bits offer great heat resistance. They are also the best for drilling into extremely abrasive as well as hard materials.
Quick Picks
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