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Precision Twist M40CO Cobalt Steel Short Length Drill Bit, Bronze Oxide Finish, Round Shank, Spiral Flute, 135 Degree Point Angle, 1/8" (Pack of 12)
- High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
- Gold oxide, retains cutting fluid and prevent chip to tool welding
- 135-degree split point angle is self-centering, reduces walking, good for hard material and reduces pressure on cutting edges
- Short-length, for better rigidity and increased strength
- Round shanks, for use on a variety of tool-holding systems
The Precision Twist M40CO jobber-length drill bit is a 135-degree split-point, heavy-duty, round shank drill bit made of high-speed steel and cobalt with a bronze oxide finish. For best use drill with hardened, tempered alloy steel, stainless steel, nodular graphite, malleable cast iron, titanium, nickel and hard material-cemets. It is suitable for drilling to a depth up to two-and-a-half times the diameter of the drill. The shank diameter is the same as the drill size.
The M40CO series has a type N flute form (a regular helix angle of 21 to 34 degrees). The bronze oxide is a low temperature heat treatment which reduces grinding stress within the tool, and has an appealing, easy-to-identify bronze color. Bronze oxide is commonly used to identify cobalt steel tools. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge.
Made of HSS with cobalt, which is many times harder/stiffer than HSS, will hold an edge longer, and will deflect less than HSS. These are also more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds.
Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to DIN 1897 industry standards (metric sizing), which helps ensure that drill bits around the world conform to the same specifications.
Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
DEWALT Titanium Drill Bit Set, 21-Piece (DW1342)
DEWALT’s titanium drill bits have a titanium coating that provides longer life when drilling in non-ferrous metals. These bits are also suitable for drilling in wood and plastic and are ideal for commercial and residential applications. The speed tip design reduces walking on start, and the no spin keeps the bit secure in the drill. Includes 21 bits sized from 1/16 to 1/2-Inch in a plastic tough case.
Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Inch, 29-piece, 1/16" – 1/2" in 1/64" increments
- Set of 29 jobber length drill bits includes inch sizes 1/16″ through 1/2″ in 1/64″ increments
- High-speed steel (HSS) provides hardness for wear resistance
- Black oxide finish reduces bit wear while promoting chip and coolant flow on ferrous material
- 118-degree conventional point for a range of drilling applications
- Jobber length drill bit has a midrange drilling depth suitable for general-purpose drilling applications
Jobber Drill Bit Set, Cutting Direction Right Hand, Material High Speed Steel, Dimension Type Fractional Inch, Number of Pieces 29, Sizes Included 1/16 In. , 5/64 In. , 3/32 In. , 7/64 In. , 1/8 In. , 9/64 In. , 5/32 In. , 11/64 In. , 3/16 In. , 13/64 In. , 7/32 In. , 15/64 In. , 1/4 In. , 17/64 In. , 9/32 In. , 19/64 In. , 5/16 In. , 21/64 In. , 11/32 In. , 23/64 In. , 3/8 In. , 25/64 In. , 13/32 In. , 27/64 In. , 7/16 In. , 29/64 In. , 15/32 In. , 31/64 In. , 1/2 In. , Point Angle 118 Degrees , Finish Black Oxide
HSS M35 Cobalt Twist Drill Bits, Pack of 10 (6.5mm, 1/4")
- Drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel
- High Quality Material. High Speed Steel Cobalt M35 Cobalt Steel Best Material.
- High Efficiency In Drilling Metals, and Stainless Steel.
- Reduce the processing cost per hole
Specially designed for drilling in hard steel,thick web helix delivers fast material removal combined with increased durability for maximum officiency and performance.
Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating,eliminating the need for a center punch.
Product Details:
Diameter: 1/4 inch
Flute length: 2.48 inch
Total length: 3.97 inch
Material: 5% Cobalt
Package: Plastic box
Drilling Reference:
Material: Automobile leaf spring steel plate
Drilling Speed(r/min): 450
Feed rate(mm/r): 4
Drilling depth: 10mm
Holes: 6
Drill Bit Set Twist Drill Bits Made of Cobalt Steel, M42 HSS 135 Degrees, Straight Shank and Metal Storage Case,for Drilling Metal, Wood and Plastics
- Cobalt Drill Bit Set is versatile drilling accessories to use, for a wide range of applications such as stainless steel, aluminum, plastic, wood, cast iron, and so on.
- KAVOL Cobalt Drill Bits are made from M42 Cobalt HSS steel for long-lasting strength and durability.
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging.
- 8% Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials.
- Packed in a Metal carry case, the index case indicates every size clearly, easy to organize and store, also protect the drill tip.
Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
- Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- 3 Steps Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic.
- This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- 135 Degree Split Point Prevents “Walking” .19Pcs Jobber Drill Bits Includes :1mm(length:3.4cm)\1.5mm\2mm\2.5mm\3mm\3.5mm\4mm\4.5mm\5mm(length:8.5cm)\5.5mm\6mm(length:9cm)\6.5mm\7mm\7.5mm\8mm(length:11.5cm)\8.5mm\9mm\9.5mm\10mm(length:13cm) [DIA 0.5mm Increments] .
- GUARANTEED：If you’re not satisfied with our product, please contact us. Refund or free replacement.
DeWalt. DWA1184 Black oxide drill bit set
- This refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box
Tired of drill bits that dull quickly and snap under the slightest pressure? Then step up to DEWALT Black Oxide Drill Bits. These industrial-grade twist-drill bits are cut from super-hard, resilient black
Precision Twist R18CO Cobalt Steel Jobber Drill Bit, Bronze Oxide Finish, Round Shank, Spiral Flute, 135 Degree Point Angle, 35 (Pack of 12)
- NAS 907 type B standards, used in the aerospace industry
- Gold oxide, retains cutting fluid and prevent chip to tool welding
- 135-degree split-point angles are self-centering, reduce walking, good for hard material, and reduce pressure on cutting edges
- High-speed steel (HSS) containing cobalt, for use on abrasive materials and high cutting temperatures
- Jobber-length drill bits and the most common length drill bit, suitable for a wide range of applications
The Precision Twist R18CO jobber-length drill bit is a 135-degree spilt-point, heavy duty, round shank drill bit made of high speed steel (HSS) and cobalt with a bronze oxide finish. They meet NAS 907 Type J, aircraft industry specifications for heat resistance and use for drilling hard, tough materials. Best performance with drilling into hardened, tempered alloy steel, nodular graphite malleable cast iron, titanium, and alloyed nickel. It is suitable for drilling to a depth up to four times the diameter of the drill. The shank diameter is the same as the drill size.
While the R18CO series was designed for aircraft industry, they also work well for drilling into a variety of materials. The 135-degree split point drill geometry help ensure an accurate hole by reducing walking when the hole is started. The finish retains lubricants to aid in wear resistance and chip flow.
The R18CO series has a type N flute form (a regular helix of 21 to 34 degrees). The bronze oxide is a low temperature heat treatment which reduces grinding stress within the tool, and has an appealing, easy-to-identify bronze color. Bronze oxide is commonly used to identify cobalt steel tools.
Made of HSS with cobalt which is many times harder/stiffer than HSS, it will hold an edge longer, and deflect less than HSS. These are also more resistant to heat than HSS. These qualities allow it to run at higher speeds and feeds. They are made to ANSI (fractional sizing) industry standards, which ensure that drill bits around the world conform to the same specifications.
Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge.
Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
Hymnorq Metric M35 Grade HSS-CO 7.5mm Twist Drill Bit Set of 10pcs – Jobber Length, Fully Ground and Straight Shank – 5% Cobalt Added and Extremely Heat Resistant -Drilling Stainless Steel and 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.
- 5PC METRIC BITS – The set includes 10pcs of 7.5mm M35 cobalt steel twist drill bits. Well packed in a plastic case for convinient storage. Manufactured to German DIN338 standard.
- 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.
HSS Titanium Coated Twist Drill Bit Set, High Speed Steel Jobber Length Drill, Split Point,13 PCS (For Wood Plastic and Soft Metal)
- 118° split point tip and twist design: increases cutting speed with self-centering and prevents walking, clears chips and particles faster
- Bit is constructed of high speed steel reduces friction and over-heated for the best combination of strength, heat resistance and wear resistance
- Includes 13 drill bits: each kit contains a total of thirteen drill bits in various sizes that fits into the power tools with clamping bits above 6.5mm more easily and securely, especially for locking into quick change chuck
- Drills accurate and clean holes in wood ,plastic and iron plate for home repairs and light jobs
- The twist drill bits are housed in metal box for easy storage, easy to carry out homework
13 PCS High Speed Steel Titanium Coated Twist Drill Bit Set By LU&MA (For Wood Plastic Aluminum Copper Steel )
Drill bits have a coating that provides longer life when drilling in non-ferrous metals.
These bits are also suitable for drilling in wood and plastic and are ideal for commercial and residential applications.
Specification:
- Material:4241 metal
- Packing: Metal box
Includes:
- 13 drill bits:1/16inch(1.5mm),5/64inch(2mm),3/32inch(2.5mm),7/64inch(3mm),1/8inch(3.2mm),9/64inch(3.5mm),
5/32inch(4mm),11/64inch(4.5mm),3/16inch(4.8mm),13/64inch(5mm),7/32inch(5.5mm),15/64inch(6mm),1/4inch(6.5mm)
Features:
- Drill bits are engineered with premium high-speed steel in a bright finish
- General purpose HSS wire gauge straight shank jobber length bits
- Each drill bit has a 118°split-point tip that’s designed for general purpose applications
- Drill bits drill exact-sized holes for tapping applications
Applications:
- Ideal for use when non-fractional-sized holes are required
- For automotive, maintenance and repair, portable drills and stationary drill press applications
- Use in wood, metal and plastic etc
- Suitable for most power tools，like Bosch GBM350RE,etc
Note:
- Due to the difference between different monitors, the picture may not reflect the actual color of the item.
- At the trepanning, please wear good protective measures, in case of chips splash damage eyes.
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