Piece Cobalt Drill
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Drilling through quarter inch thick hardened stainless.?
I have went through 3 cobalt drill bits trying to drill through a quarter inch thick piece of what I assume to be stainless. The reason I think it is stainless is because i know it has been exposed for at least a year with no rust or discoloration and it is also very heavy (rules out titanium). The band of steel is ¼ thick x 1 ½ wide. Any suggestions as to speed, type of bit, lubrication, etc., will be greatly appreciated!
the cobalt bits are the best. drill small pilot holes and cool your bitt by spraying anti-freez on it.
Here are some excellent bargains on ebay for Piece Cobalt Drill
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Forney 29 piece Cobalt Industrial quality drill bit set $99.99 |
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New DeWalt DD4069 Industrial Cobalt Drill Bit Set – 29-Piece $159.99 |
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NEW 13 Piece COBALT Drill Bit Set with Huot Index USA! $18.99 |
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NEW Dewalt DW1263 14-Piece Cobalt Pilot Point Drill Bit $29.99 |
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Irwin 15 Piece, Cobalt Pro Drill Bit Set $24.99 |
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NEW Dewalt DW1263 14-Piece Cobalt Pilot Point Drill Bit $19.99 |
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High Quality Cobalt Drill Bits 29 Piece Set USA $130 $66.99 |
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Triumph 29 Piece Cobalt Drill Bit Set $79.99 |
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Hanson 29 Piece Cobalt Drill Bit Industrial Set Case $113.51 |
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NEW 13 Piece COBALT Drill Bit Set with Index! Tools $14.99 |
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Vermont American 12645 29-Piece Cobalt Drill Bit Set $304.13 |
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ATD-9260 13-Piece Cobalt Drill Bit Set $26.13 |
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ATD-9261 29-Piece Cobalt Drill Bit Set $110.39 |
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Irwin 15 Piece Cobalt Drill Bit Set $34.00 |
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DRILL BIT #30 COBALT 12 PIECES POP RIVET SIZE $9.95 |
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115 Piece Cobalt Drill Bit Set $115.99 |
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29 Piece 135° Degree Split Point Cobalt Drill Bit Set $56.99 |
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New DeWalt DW1263 Cobalt Pilot Point Twist Drill Bit 14-Piece $29.99 |
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Grip 35357 21-Piece Cobalt Drill Bit Set $31.99 |
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New DeWalt DW1269 29-Piece Cobalt Pilot Point Metal Drill Bit Index Set $99.99 |
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FOUR NEW 13 PIECE COBALT DRILL BITS SETS tools/shank $31.88 |
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Bosch Pro CO18 18 Piece Cobalt Twist Drill Bit Assortment in Plastic Case $66.83 |
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COLUMBIAN 13 PIECE COBALT PENETRATED DRILL BIT SET $11.49 |
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GRIP 35357 COBALT DRILL BIT SET – 21 PIECES $23.79 |
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DeWalt DW1269 29-Piece Cobalt Drill Bit Set $160.38 |
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Bosch CO18 18-Piece Cobalt Twist Drill Bit Assortment i $65.43 |
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Irwin Cobalt HSS Fractional Bit Sets -15 piece cobalt drill bit set 316015 $32.99 |
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11119 10 Piece Screw Extractor Set With Cobalt Lh Drill Bits $48.71 |
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DeWalt DW1263 13 Piece Cobalt Drill Bit Set $41.03 |
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Cobalt High Speed Steel Drill Bit Sets -29 piece cobalt drill bit set w/case $106.99 |
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Milwaukee 14-Piece Cobalt Drill Bit Set 48890026 $69.99 |
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29 Piece 135° Degree Tips Split Point M35 Cobalt Drill Bit METAL CASE NEW $79.99 |
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Irwin 15 Piece, Cobalt Pro Drill Bit Set $26.06 |
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NEW HITACHI 13 PIECE PC COBALT DRILL BIT SET 728088 $49.95 |
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Irwin 15-Piece High Speed Steel Cobalt Drill Bit Set 316015 $48.99 |
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COBALT 115 PIECE PREMIUM DRILL BIT SET AGGRESSIVE 135 DEGREE TIPS METAL CASE NEW $167.99 |
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NEW 13 Piece COBALT Drill Bit Set with Index! Tools $16.99 |
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NEW 13 Piece COBALT Drill Bit Set with Huot Index USA! $19.99 |
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Mountain 29 Piece Cobalt Reduced Shank Twist Drill Bit Set $78.85 |
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29-Piece Cobalt Drill Bit Set ATD-9261 $99.95 |
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Cleveland cobalt drill bits, 2 ,10 piece sets & additional bits unused $44.95 |
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Bosch CO18 18-Piece Cobalt Twist Drill Bit Assortment in Plastic Case $66.81 |
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NEW MOUNTAIN 29 PIECE HIGH SPEED COBALT DRILL BIT MECHANIC SHOP TOOL SET $99.99 |
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NEW MOUNTAIN 29 PIECE DRILL BIT SET HSS COBALT REDUCED SHANK SHOP WORL TOOL $89.99 |
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ATD-9260 ATD Tools 13-Piece Cobalt Drill Bit Set $27.39 |
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ATD-9261 ATD Tools 29-Piece Cobalt Drill Bit Set $110.22 |
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Irwin 3018002 29-Piece Cobalt M-35 Metal Index Drill Bit Set $116.52 |
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Vermont American 12687 13-Piece Cobalt Drill Bit Set $56.50 |
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Vermont American 10 Piece Cobalt Drill Bit Set 12686 $20.38 |
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DeWalt DD4069 Cobalt Fractional Jobber Drill Set, 29 Piece $159.56 |
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COBALT 115 PIECE PREMIUM DRILL BIT SET AGGRESSIVE 135 DEGREE TIPS METAL CASE NEW $169.99 |
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Irwin 15 Piece, Cobalt Pro Drill Bit Set 316015 $31.99 |
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Irwin 63137 15-Piece Cobalt High Speed Steel Drill Bit Set $80.91 |
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Ridgid 6765 14-Piece Cryo Cobalt Drill Bit Set $19.00 |
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Vermont American 12687 13-Piece Cobalt Drill Bit Set 1/16″ to 1/4″ $20.00 |
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COBALT 115 PIECE PREMIUM DRILL BIT SET AGGRESSIVE 135 DEGREE TIPS METAL CASE NIB $179.95 |
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COBALT 29 PIECE PREMIUM DRILL BIT SET AGGRESSIVE 135 DEGREE TIPS METAL INDEX NIB $89.95 |
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115 Piece Cobalt Drill Bit Set Cobalt Lasts Longer $159.99 |
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Bosch CO10 10 Piece Cobalt Twist Drill Bit Assortment in Plastic Case NEW!! $16.49 |
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Mountain 29 Piece Cobalt Drill Bit Set $86.17 |
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Vermont American 12687 13-Piece Cobalt Drill Bit Set $54.15 |
And a few more great deals on Amazon:
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Hanson 29 Piece Cobalt M-42 Metal Index Drill Bit Set – HAN3018002B $126.35 Features and Benefits: Cobalt steel extends cutting edge life and largetains cutting life after resharpening Extra hard drill for greater wear 135 degree split point tip starts on contact, cuts with less force Rubber overmolded case protects kit if dropped Tap and Drill selection chart for convenience reference Automatic indexing for easy bit access and identification. Removable cartridges: easy… |
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13-Piece Cobalt Drill Bit Set $21.99 ATD-926013-Piece Cobalt Drill Bit SetCobalt steel extends the life of the cutting edgeOffers the best heat resistance for drilling in extremely hard & abrasive materials including stainless steel, titanium & cast ironBits 1/8″ & larger feature a 135Ë split point for easier starts & minimal bit walkingPacked in a metal drill index box:1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 11/64″, 3/16″… |
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Dewalt DW1263 14-Piece Cobalt Pilot Point Twist Drill Bit Set $19.99 The DeWalt DW1263 14 Piece Cobalt Split Point Bit Assortment includes a selection of commonly used bits that have been precision crafted to provide improved durability and faster cutting. Featuring a pilot point tip design that reduces walking at startup to provide you with more precise performance, these industrial-strength Cobalt bits make quick work of tough tasks like drilling through stainles… |
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DEWALT DW1269 29-Piece Cobalt Pilot-Point Metal Drill Bit Index Set $89.99 The DEWALT DW1269 29-piece cobalt pilot-point metal drill bit index set comes with pilot-point tips for starts on contact that result in clean, accurate holes. With an industrial-grade cobalt finish for drilling in stainless steel and other abrasive metals, these bits are designed to reduce lock-up on breakthrough, and also feature a no-spin shank that eliminates the frustration of bit spinning in… |
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Irwin Industrial Tools 3041006 Speedbor Max Spade Bit Set, 6-Piece $20.06 Tri-Flute design allows for faster chip ejection, making this woodboring bit the fastest Speedbor bit ever! Max Life cutting spurs have 3 cutting edges for added durability. Grooved hex shank prevents slipping in drill chuck or bit extension (fits all standard 1/4in. quick-change chucks). Max Ease full screw tip allows bit to self feed. Includes (qty.): 6, Chuck Size (in.): 1/4… |
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GearWrench 3887 Tap and Die 75 Piece Set – Combination SAE / Metric $148.24 Patented Twist Lock Guide System reduces backwalk of die guide and keeps dies centered while cutting threads. Reversible lever with 5deg ratcheting arc eliminates hand-over-hand turning. Ideal for working in tightly confined areas. SAE Set: Yes, Metric Set: Yes, Pieces (qty.): 75, Dies (qty.): 34, Taps (qty.): 34… |
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Mibro 492470 17-Piece Cobalt Metal Master Set, 1/6-Inch to 3/8-Inches $34.88 … |
.223 Case Preparation – RCBS Case Prep Center