Hymnorq M35 Grade HSS-CO 5/32 Inch Fractional Twist Drill Bit Set of 10pcs, J...

Description

Hymnorq M35 Grade HSS-CO 5/32 Inch Fractional Twist Drill Bit Set of 10pcs, Jobber Length Fully Ground Straight Shank, 5% Cobalt Heat Resistant, for Stainless Steel Cast Iron
Drill Bit for Metalworking Tech Tip 1: You shouldn’t drill deeper than 1/2 of the drill bit’s 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 imperial fractional inch 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: 10pcs of 5/32" jobber length M35 cobalt twist drill bits, packed in a transparent plastic storage case. Read more 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“ or ”wander“.The end of shank is chamfered to allow easy and firm holding.Special bronze SST heat and surface treatment. Read more 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. Read more 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 ✓ ✓ ✓ ✓ ✓ ✓ 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 135º Split Point ✓ ✓ ✓ ✓ ✓ ✓ 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
Features:
COBALT STEEL - Manufactured from M35 grade 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, ideal for repeated drilling in metalworking.
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.
SELF CENTERING - The 135quick-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.
10PC SET - The set includes 10pcs of 5/32 inch diameter M35 grade cobalt steel twist drill bits, packed in a convenient plastic case for easy taking to worksites. Manufactured to German DIN338 standard.
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.
Product Details:
Manufacturer: ‎Hymnorq
Item Weight: ‎3.98 ounces
Package Dimensions: ‎4 x 2.5 x 0.2 inches
Country of Origin: ‎China
Is Discontinued By Manufacturer: ‎No
Style: ‎5/32"(10pcs)
Finish: ‎Bronze Oxide
Material: ‎5% Cobalt Steel
Measurement System: ‎Inch
Batteries Included?: ‎No
Batteries Required?: ‎No
Date First Available: October 9, 2018
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