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【SIZE】- Shank / Cutting Edge Diameter:1.5mm/0.06-inch;Total length:40mm/1.57inch;Our Drill Bits Contain 5% Cobalt, Are Fully Grounded for a Precision Drilling Diameter
【COBALT STEEL】- Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit
【SELF CENTERING 】-Fully ground spiral flute discharge scraps quickly, reduce friction and heat, therefore provides a faster, cooler and more efficient drilling performance; 135° Split Point with straight shank prevents slippage and makes drilling stable and precise. No center punch is needed., fit for standard drill chucks and regular round collet chucks.
【WIDE APPLICATIONS】-Drill Bits are successful in cutting hard metals such as stainless steel;copper;aluminum alloy;and also can be used for softer materials
【SPECIAL DESIGN】- Cobalt high speed steel for super abrasive resistance in tough metals;improve much higher heat resistance because of cobalt steel's high red hardness
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Auniwaig company is a professional supplier of various tool accessories, such as cutting tools, grinding and polishing tools, repair tools, hole saws, sandpaper and many other precision tool supplies
Due to the light and screen difference, the item's color may be slightly different from the pictures.P
lease allow 0.1-0.2 mm differences due to manual measurement.
Material: High Speed Steel M35 with 5% Cobalt
Shank: Straight Round Shank
Split Point: 135 degree
M35 Grade Cobalt Steel:
Cobalt drill bits are made of high speed steel with certain percent cobalt.
The 5-percent cobalt is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant.
Cobalt drill bit's hardness is uniform throughout the entire material, so that can be repeatedly sharpened without damaging the cutting edge allowing it to drill more than hss drill bits.
How to Use Cobalt Twist Drill Bits?:
1.Hand drills are suitable for drilling low hardness materials.
2.Drilling Metal is recommended for use on bench drills.
3.Mini twist drill bit can NOT be used in the impact drill.
4.Ensure the left and right cutting edges of the drill are symmetrical when drilling.
5.Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit.
6.Please use with cooling liquid to prolong the working life of the drill bits and to avoid overheating and breakage.
135 degree means less force required to remove metal, compared with lower angles like 90° and 118°
Self-centering split point allows you to drill directly to the size needed without any pre-drilling.
Keep the drill bit vertical with the stuff's surface to be drilled.
Tilted bit is prone to break during drilling.
Be sure to make both the bit and the workpiece stable.
Keep Stay Cool
Friction will accumulate heat between bits and work piece.
Be aware of the heat, add water or coolant if necessary.
Drilling low hardness metal requires low RPM. Please use a device of which the drilling speed can be adjusted.
Be careful when you use an electric drill. The RPM could be set too high.
The thicker the bit, the slower speed should be.
If you're not sure, please start from the lowest RPM and pressure.
1.Heavy-duty, fully ground body construction;High flow spiral design for the fastest removal rate and for thick material.
2.Improve the cutting accuracy, improve the wear resistance of the surface of the object, and prevent the surface of the object from oxidation and corrosion
3.Suitable for hardened materials and hard metals, such as cast iron, hard plastics, and also suitable for soft materials. When it cannot penetrate, try to adjust the RPM\
Drill Bits are successful in cutting hard metals such as stainless steel;copper;aluminum alloy;and also can be used for softer materials
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