INDUSTRAIL AGRESSIVE COBALT DRILL BIT SET 115PC 135 DEGREE SPLITCUT WithSTEEL CASE
115 PIECE PREMIUM QUALITY COBALT DRILL BIT SET. THESE ARE NOT COATED DRILL BITS. THE REAL McCOY COBALT DRILL BITS. CUTS CAST IRON-HEAT TREATED STEEL-STAINLESS STEEL- OTHER HARD METALS THESE METALS ARE NO THREAT. EXTREMELY AGGRESSIVE 135 DEGREE SPLIT TIPS. COBALT DRILL BITS ARE MADE TO CUT AT LOW RPM DRILLING. COBALT HARDNESS TO 1000 DEGREES FAHRENHEIT. SPLIT POINT NO SKATING NO CENTER PUNCH NEEDED IN MOST CASES. Each of these 115 cobalt drill bits comes organized in a metal indexed storage case for easy transport to your worksite. These cobalt drill bits retain their hardness up to 1000 degrees Fahrenheit making them ideal for drilling cast iron, heat-treated steel, stainless steel and other hard materials. With aggressive 135 degree tips, these cobalt drills bits not only last longer but also cut faster than your standard high speed steel bits at a lower RPM! Cobalt steel bits last longer, cut faster than high speed steel Cobalt drill bits lasts longer than regular HHS 29 fractional sizes: 1/16 in. By 64ths 26 letter sizes: A-Z 60 numbered wire gauges:1 to 60 Metal storage case Retains hardness at temperatures up to 1000° F Cutting speeds can be increased by 10% over standard HSS with less RPMs Abrasion resistant feature makes it ideal to use on cast iron, cast steels, and heat-treated steel. How do I know if I need cobalt drill bits? A recent question asked to. Different types of drill bits are used to cut holes in different types of materials. Diamond drill bits are used for materials such as glass and tile; black oxide bits are common for plastics and carbon. Cobalt drill bits are particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 to 8 percent cobalt. The 5-percent alloy is known as M35 grade, and the 8-percent alloy is M42. The cobalt increases the strength of the steel and makes it more heat-resistant; this is an important factor in drilling hard materials because the friction of metal against metal can produce high temperatures that damage the material or the drill bit. On the other hand if there is too much cobalt it would make the bit too brittle and the tip would continue to break off. New cobalt drill bits are a dull gold color, making them distinctive on the shelf (or in your toolbox). The color occurs when the drill bits are baked in the process of production; its not a paint or plating — cobalt drill bits are cobalt alloy through and through. For this reason, they can be sharpened relatively easily with cutting fluid while retaining their strength and durability (although the gold color may wear off). Important to remember that the tips are cut at a radical 135 degree angle and that means this will prevent skating. It is suggested to use a slower speed and this will let the cutting edge do its work. Cobalt drill bits are often more expensive than other drill bits and all cobalt bits are made from Chinese manufactures. These cobalt bits can be stamped with any name the retailer wants for example. The price will go up drastically but the quality of the cobalt bit will not. But if you regularly drill through metal, they are a good investment since they tend to last longer. 29 FRACTIONAL SIZES: 1/16″ to 1/2″ by 64ths. 26 LETTER SIZES: A to Z. 60 NUMBERED WIRE-GAUGE SIZES: 1 to 60 by 64ths. STEEL INDEXED STORAGE CASE. Fractional sizes: 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, 5/64 in, 13/32 in, 27/64 in, 7/16 in, 29/64 in, 15/32 in, 31/64 in, 1/2 in; Letter sizes: A 0.234 in. , B 0.238 in. , C 0.243 in. , D 0.247 in. , E 0.250 in. , F 0.257 in. , G 0.260 in. , H 0.266 in. , I 0.271 in. , J 0.275 in. , K 0.281 in. , L 0.289 in. , M 0.295 in. , N 0.301 in. , O 0.313 in. , P 0.321 in. , Q 0.332 in. , R 0.339 in. , S 0.347 in. , T 0.356 in. , U 0.367 in. , V 0.382 in. , W 0.388 in. , X 0.398 in. , Y 0.403 in. , Z 0.412 in. ; Numbered sizes:1 0.228 in. , 2 0.220 in. , 3 0.213 in. , 4 0.209 in. , 5 0.205 in. , 6 0.204 in. , 7 0.201 in. , 8 0.199 in. , 9 0.196 in. , 10 0.194 in. , 11 0.191 in. , 12 0.188 in. , 13 0.185 in. , 14 0.182 in. , 15 0.180 in. , 16 0.176 in. , 17 0.173 in. , 18 0.169 in. , 19 0.167 in. , 20 0.162 in. , 21 0.159 in. , 22 0.156 in. , 23 0.154 in. , 24 0.153 in. , 25 0.149 in. , 26 0.147 in. , 27 0.144 in. , 28 0.140 in. , 29 0.136 in. , 30 0.128 in. , 31 0.120 in. , 32 0.116 in. , 33 0.113 in. , 34 0.112 in. , 35 0.110 in. , 36 0.106 in. , 37 0.104 in. , 38 0.101 in. , 39 0.099 in. , 40 0.098 in. , 41 0.096 in. , 42 0.093 in. , 43 0.090 in. , 44 0.086 in. , 45 0.083 in. , 46 0.081 in. , 47 0.079 in. , 48 0.076 in. , 49 0.073 in. , 50 0.070 in. , 51 0.067 in. , 52 0.064 in. , 53 0.058 in. , 54 0.054 in. , 55 0.052 in. , 56 0.046 in. , 57 0.043 in. , 58 0.042 in. , 59 0.041 in. , 60 0.040 in. “Joe’s suggestion” Cobalt drill bits can be kept sharp longer by observing proper drilling techniques. When using a cobalt drill bit on metal, reduce the speed at which you drill. Pumping the trigger of the drill will allow the drill bit to cut and keep the RPM, revolutions per minute, low. Using a cutting and tapping fluid will keep the drill bit cooler while drilling. The cutting fluid acts as a lubricant between the drill bit and the work piece. This reduction in friction lowers the temperature of the drill bit and keeps the tip of the bit sharper for a longer time. REVIEWS FROM PAST BUYERS. Drill Master 115 Piece Cobalt Drill Bit Set. I Use these bits to drill 1/4 to 1/2 inch steel. They stay sharp both at high speed and low speed. I have not had to sharpen one yet. Don’t need center punch. Yes, I would recommend this to a friend. I’ve been a machinist for over 40 years so I know a little about drill bits and drilling. I bought these for home use and have been very impressed with how they hold up. Snap-on only has their name & red paint on theirs-they do not make them you’re paying for that name with no replacement guarantee on S-O bits. I picked these up thinking that if they didn’t perform up to cobalt steel standards I can at least use them in place of HSS. I was quite surprised to see how well they held up against regular abuse with stainless steels (mostly 304). They’re a much better value than TiN coated bits because they can be resharpened / reconditioned. Try to find a better value anywhere. This also includes our friends and good neighbors in Canada, Africa, South America, United Kingdom, Europe, and Australia. Please take a few moments to visit my feedback. PLEASE understand this: I only charge. , I won’t include 8 mile drives’ to the Post Office since most of my packages, not all, are picked up by the carrier. If for ANY reason this charge of. Thank you Dr Joe Burdek. PERSONALLY INSPECTED and FIELD TESTED. On many of my items I will consider your BEST OFFER also. Please don’t be afraid to ask, I just may accept you offer. If I don’t then the counter offer will be rock bottom. We were Retail Dealers at Wildwood Peddlers Fair in Pittsburgh and decided to retire to Florida just two weeks before their devastating 100 year flood. We are constantly shopping for new ideas and great deals and will pass them on to you. If you would be so kind to put me down as one of your favorite sellers also: “Visit my store often ” Pittsburgh Joe’s Pants N’at so not to miss out on the great deals. We are a smoke-free home. PROCEEDS OF SALES HELP PUT THROUGH A STUDENT AT U. We have a cat, “lazee duckee”. Please don’t drink and drive. MAY GOD BLESS AMERICA AND WATCH OVER ALL OF OUR TROOPS OVERSEAS. Bookmark Me First Then Please- Take A Minute To Visit The Vietnam Memorial Wall. Sit back-see the Wall and listen to George Jones sing a very moving Tribute country song. But this may change without notice. The item “INDUSTRAIL AGRESSIVE COBALT DRILL BIT SET 115PC 135 DEGREE SPLITCUT WithSTEEL CASE” is in sale since Wednesday, May 14, 2014. This item is in the category “Home & Garden\Tools\Power Tools\Drill Bits”. The seller is “burdfrenzy” and is located in Tampa, Florida. This item can be shipped worldwide.
- Type: COBALT STEEL DRILL BITS
- Brand: PITTSBURGH DM
- Model: 115 piece industrail set
- Country/Region of Manufacture: Unknown
- MPN: Does Not Apply