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Drill America 29 Piece M35 Cobalt Drill Bit Set in Round Case (1/16" - 1/2" X 64ths), DWDCO Series
Specifications for this item
|Brand Name||Drill America|
|Compatible Material||Steel , Stainless Steel , Metal , Inconel , Titanium|
|Cutting Angle||135 degrees|
|Exterior Finish||Gold Oxide|
|Finish Type||Gold Oxide|
|Global Trade Identification Number||00887861039055|
|Hand Orientation||Right Hand|
|Included Components||Drills: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64",|
|Item Weight||2.20 pounds|
|Lead Angle||135 degrees|
|Manufacturer Series Number||DWDCO|
|Number Of Flutes||2|
|Number of Items||1|
|Point Type||Split Point|
|Special Features||Round Drill Case|
|Tool Flute Type||Spiral|
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From the manufacturer
Drill America 29 Piece Drill Set in Rust Resistant, Water and Shatter Proof Round Case
All The Bits You Need
29 Piece Sets includes fractional sizes from 1/16" to 1/2" by 1/64" increments.
Hang for Quick Access
When all hands are on deck, hang the drill index on your belt whether you're in the shop or field.
Easy to Handle Plastic Case
Unique round drill index combines form and function into one beautifully designed, easy to carry drill set.
Fits Anywhere You Need It
Effortlessly grip the set in one hand as you would a travel coffee mug or leave it in the cup holder of your truck while on the way to a job.
Drill America Cobalt Drills
Drill America Cobalt Drills are are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium.
135 Degree Split Point Tip
Drill America Cobalt Drill Bits have a 135 degree split point tip for self-centering and reducing thrust. Compared to a conventional 118 degree tip, these drills wont go "walking" on you.
|KFD Black and Gold Drill Set||m35 Cobalt Drill Set||m42 Cobalt Drill Set|
|29 Piece Drill Set||✓||✓||✓|
|Sizes 1/16” - 1/2"||✓||✓||✓|
|Rust Resistant, Water and Shatter Proof Round Case||✓||✓||✓|
|Material||m2 High Speed Steel||m35 Cobalt||m42 Cobalt|
|Drill Bit Description||KFD Killer Force Drill Bits are manufactured from M2 premium grade high speed steel. For use in a wide range of materials in the iron and steel families such aluminum, iron, stainless steel and other hard metal drilling.||Drill America Cobalt Drills are are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. Made of m35 cobalt.||Drill America Cobalt Drills are are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. Made of m42 cobalt.|
|Finish||Black and Gold||Gold Oxide||Gold Oxide|
|135 Degree Split Point Tip||✓||✓||✓|
The Drill America DWD29J-CO-PC Qualtech jobber length drill bit set contains 29 cobalt steel drill bits with gold oxide finish in inch sizes 1/16" to 1/2" (1/64" increments). A self-centering 135-degree split point penetrates hard material without a pilot hole and produces smaller chips that reduce clogging compared to a 118-degree point. Cobalt steel provides extended tool life compared to high-speed steel drill bits, and maintains the tool's toughness and hardness in high drilling temperatures. A gold oxide finish acts as a lubricant and provides wear resistance, and the round shank accommodates most drill chucks. The set comes in a plastic index case with labeled compartments for identification and organization. Drill bits conform to American National Standards Institute (ANSI) standards.
Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach to work with the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with either a 1/2" or 3/4" drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra long twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.
Drill America manufactures cutting tools such as drill bits, taps, dies, counterbores, countersinks, end mills, and reamers. The company, founded in 1927, is headquartered in Miami, FL.
What's in the Box?
- (29) drill bits, sizes 1/16" to 1/2" in 1/64" increments
- (1) plastic case
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I've used onee of these bits top drill holes in annealed O1 tool steel plate, and it held up as well as you'd expect from Cobalt HSS, though maybe a little worse than I'd expect from the C-Ls. The C-L 550s are M42 Cobalt HSS, and it would be interesting to know if these are M42 or M35 - I suspect the latter.
Where the Drill Americas come up a bit short is in quality/precision of grinding, with two noticeable issues: The trailing face of a split-point bit should ideally meet the cutting edge at a point, though in reality all manufacturers leave a tiny chisel point to allow for machining tolerances (i.e. the split doesn't quite intersect the cutting edge). Those residual chisel points are noticeably (50-100%) larger on the Drill America bits than on the Chicago-Latrobes, though both are MUCH smaller than the chisel point on a conventional bit, and both are small enough to avoid wandering.
A more serious issue is that a couple of the smaller bits are mis-ground such that the trailing edge of the splitting edge is almost on top of the bit's cutting edge, leaving a very thin flute.
Both of the grinding issues are foregivable in my opinion both because of the low cost of the bits, and because the key benefits of cobalt bits is that they derive their hardness from bulk material properties rather than from a coating (oxide, TiN, TiAlN, etc). You can grind them over and over and they remain as durable as when new. If you have a Drill Doctor or drill-bit grinding fixture that can do split points then these are a no-brainer.
First impressions are very sturdy and they chewed through stainless steel like it was warm butter! These drill bits are awesome! Made building my brew system much easier.
Otra cosa muy mala es que no todas las brocas son para el mismo tipo de taladros,unas son delgadas que le quedan a cualquier taladro y otras las más grandes no entran en la boca de mi taladro, porque están muy gruesas.