Top 8 Best 4mm Drill Bit

Features Cutting Edge Diameter 4mm 0.16 Shank Diameter 4mm 0.16 Cutting Edge Length 44mm 1.73 Total Length 75mm 2.95. High Speed Steel Tool High-speed steel straight shank tool is good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Reduced Shank Reduced shank drill expands the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Black Gold Oxide Finish Premium gold titanium and black nitride dual coating can apply lubricant better for smoother drilling and is more durable and corrosion resistant. Versatile Uses For use in a wide range of stainless steel, aluminum alloy, iron, copper, brass and metal materials.

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.. 135SPLIT POINT - the 135quick-cut split point are self-centering and able to penetrate metals quickly with less pressure, prevent bits from walking and wanding. Easy cutting without need of center punch.. 10PC METRIC BITS - The set includes 10pcs of 4mm 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 metalshardness 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..

Specification - 10Pcs 4mm cobalt drill bits, each kit contains a total of ten drill bits in the same size, Blade length 43mm1.7inch, 118 degree point, straight shank.. Material - HSS Cobalt high speed steel for super abrasive resistance in tough metals, improve much higher heat resistance because of cobalt steel's high red hardness.. Durable - HSS Cobalt Drill Bit provide strong durable performance compared to typical hss drill bits.. Easy to Carry - The twist drill bits are housed in plastic case for easy storage, easy to carry out homework.. Multi-purpose Use - HSS Drill Bits are successful in cutting hard metals such as stainless steel, copper, aluminum alloy, and also can be used for softer materials..

Size74 x 4mm2.91 x 0.16LW.. Made of high speed steel for durability and extra long life. Precise cutting edges to reduce splintering,Engineered flutes for clean effective chip removal.. Suitable for drilling precise holes in wood, and great for use in doweling. Package included5pcs x Wood Drill Bit..

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. Real 532. 532 equals to 3.97mm. Exact size is 3.97mm, tolerance 0.02mm.

Cemented Carbide Tip 4mm twist drill bits are made of cemented carbide tip for long service life, more sharp and durable than others. Features Milled U-flutes with deep-cut spiral delivers fast material removal. Suitable for drilling in tough metal, including heavy-duty abrasive alloy and hardened steel. Use For Drilling clean, accurate holes in sheet metal, steel, copper, brass, aluminum, plastic, wood, stainless steel and cast iron. Use Note Please use low speed when drilling and note the temperature of carbide tip is not too high for extending drill bit life. Round Shank Design Round shank twist drill bit can work with a electric drill Excluding in the item..

4mm Dia25mm Flute Length50mm Full LengthStraight shank118 Degree PointT.I.R.Total Indicator ReadingMaximum 10um0.01mm. Made of Solid Micro carbideTungsten Steel,HRC55,High quality TiAlN coating,getting long tool life.. Suitable for profiling Alloys,Aluminium,Copper,Stainless steel,Iron and Hard steel.... High hardness,High Performance.Good surface roughness.can be high-speed machine processing.. Package1Pc Carbide Router Drill Bit..

Size- Bit Diameter 4mm0.16inch Total length71mm2.8inch Cutting Edge Diameter4mm0.16inch. Feature- Flutes form helps clear chips and debris away from the bitdecreasing friction and heat for a fastercooler drilling process.. Advantage- Cobalt high speed steel for super abrasive resistance in tough metalsimprove much higher heat resistance because of cobalt steel's high red hardness. Wide Applications-Drill Bits are successful in cutting hard metals such as stainless steelcopperaluminum alloyand also can be used for softer materials. Special Design-The twist drill bits for easy storageeasy to carry out homeworktwist drill bits Must be used and operated at 1501 RPM or greater for maximum efficiencyStraight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks.

HIGH SPEED STEEL -- Twist drill bit are made of high speed steel for high hardness and durability.The length of each bit in the set is approximately 150mm 160mm.. 5 SIZES -- This drill bit set includes 5 bits in different sizes of the most popular bits.Diameter is 2mm, 3mm, 3.5mm, 4mm, 5mm, you can use them for different purposes.. EASY TO DRILL DEEPER -- Extra long cutting edge allows you to use these bits to drill deep holes, sharp and twisted bits will make drilling easier and effortless. WIDE APPLICATION -- They are ideal for most drilling jobs and materials such as aluminum, wood, plastics.. 100 SATISFACTION GUARANTEE -- This extra long drill bits kit has a complete after-sales service, If you have any questions about the product or you are not satisfied,please contact us at any time, we will provide you with the best solution.Your satisfaction is our main concern.

HIGH EFFICIENCY AND FAST CUTTING--Sharp twisted drill bits flute will make the drilling easier and more effortless. STRAIGHT SHANK DESIGN MAKES IT EASIER FOR ELECTRIC DRILLS--Straight shank design is more suitable for many electric drills and drilling machines here is not included. HIGH STANDARD MATERIAL ENSURES LONG LASTING PERFORMANCEThis Extra Long Drill Bit is made of high quality material, and it is finished with fine polish to offer a good durability. WIDELY APPLICATIONS--It is widely used in the drilling of wood, aluminum, plastic, etc. LONG LENGTH FOR CONVENIENT USE--The length of the bit is 4mm, and the whole length is 200mm.