Name: 10mm Metric Twist Drill Bit Set of 3pcs - Jobber Length Fully Ground Straight Shank ?M?5% Cobalt M35 Grade HSS-CO, Extremely Heat Resistant ?M?Perfect for Stainless Steel Cast Iron
SKU: YC6QGDJ70B
Availability: InStock

10mm Metric Twist Drill Bit Set of 3pcs – Jobber Length Fully Ground Straight Shank ?M?5% Cobalt M35 Grade HSS-CO, Extremely Heat Resistant ?M?Perfect for Stainless Steel Cast Iron

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 – The 135??quick-cut pilot split points are self-centering and can penetrate quickly with less pressure. The bits will not “walk” or “wander”. Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.
3PC SET – The set includes 3pcs of 10mm diameter fractional inch size M35 grade cobalt steel twist drill bits. Manufactured to German DIN338 standard. Packed in a plastic bag and a flat paper box.
FOR METALWORKING – Particularly successful in cutting through hard metals(hardness less than HRC38??) such as stainless steel and cast iron, although they can be used for softer materials like copper and aluminium, too. Not for hardened steel / high carbon steel. Try to adjust the RPM when it fails to penetrate.
DOWNLOADABLE USER GUIDE – We’ve summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the internet. In most cases, our customers would get a much better result with these tips. Welcome to download.

Drill Bit for Metalworking

Tech Tip 1: You shouldn?M?? drill deeper than 1/2 of the drill bit?M?? fluting length to have the best drilling performance.
Tech Tip 2: Don’t use M35 cabalt bits on hardened steel, high carbon steel and heat treated steel.
Please wear safe clothing and eye protection for your safety.

M35 5% Cobalt Steel Twist Drill Bits Set

A nice-to-have metric twist drill bit set for repeated drilling in metals

M35 Grade Cobalt Steel

Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with certain percent cobalt. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant.

Lowest Cost Per Hole Drilled

Cobalt bits are more expensive than ordinary HSS drill bits. But if you regularly drill metals, they are a good investment since they tend to last longer. With an extended life, you can lower the cost per hole drilled.

The package includes: 3pcs of 10mm M35 cobalt twist drill bits, packed in a transparent plastic storage case.

Key Features


135 Degree Split Point 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.	Twist Drill Bit Body Heavy-duty, fully ground body construction. High flow spiral design for the fastest removal rate and for thick material.	Straight Shank Straight shank for standard drill chuck, less “walk?M?or ?M??ander?M? The end of shank is chamfered to allow easy and firm holding. Special bronze SST heat and surface treatment.

Make Most of Cobalt Drill Bits with These Tips


Be Vertical 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.	Do It Slow Drilling 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.	Stay Cool Friction between bit and metal will accumulate an amount of heat. It’s necessary to use cooling liquid during drilling to keep the bit cool. Otherwise, the bit may fry(melt) or only last a short time. It’s both ok to use lubricant oil and to pour water.	Right Drilling Device It’s highly recommended that you use a drill press to drill thick metals. It’s stable, powerful and (RPM) adjustable. If a drill press isn’t available, electric drill or charging drill will do the job, too. However, it’s more likely you’ll meet problems unless you’re really experienced.

		$13pc cobalt fractional inch twist drill bit set 1/16 - 1/4$
	13PC SET	13PC SET	15PC SET	15PC SET	29PC SET	19PC SET
Measurement System	Metric	Fractional Inch	Fractional Inch	Metric	Fractional Inch	Metric
5% Cobalt Steel	???/span>	???/span>	???/span>	???/span>	???/span>	???/span>
Organizer	Metal Index Case	Metal Index Case	ABS Plastic Index Case	ABS Plastic Index Case	ABS Plastic Index Case	Metal Index Case
Size Range	1.5mm – 6.5mm	1/16″ – 1/4″	1/16″ – 3/8″	1.5mm – 10mm	1/16″ – 1/2″	1.0mm – 10mm
135?? Split Point	???/span>	???/span>	???/span>	???/span>	???/span>	???/span>
Manufacturing Standard	German DIN338	SAE	SAE	German DIN338	SAE	German DIN338
Manufacturing Technology	Fully Ground	Fully Ground	Fully Ground	Fully Ground	Fully Ground	Fully Ground