Cutting Tools

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How are hardened cutting tools manufactured?

For example, diamond tipped drills or cutters. If diamond is the hardest substance on Earth, what substance can possibly be employed to machine it?

Also, how are hardened lathe/drill bits manufactured?

Diamond tip tools are used in a fashion that grinds like sandpaper. The diamonds are small bits and dust that is on the surface of the substrate (cutting tool). The diamonds are not machined to a specific shape, but are selected by size. There are a few technologies for keeping the diamonds on the surface, but the basic idea is glue. Different substrates and glues are used depending upon what you are cutting.

Another technology for tools is carbide tips. Carbides are salt-like compounds formed from carbon and a metal. Carbides comes in many forms, but the most common for cutting tools is tungsten carbide and titanium carbide. Carbide is almost as hard as diamond, but much cheaper since it can be manufactured instead of mined. Again, the difficulty of using it on cutting tools is how to attach chunks of carbide to the business end of the cutting tool. Carbide can be shaped to fit and brazed in place. See link with picture. You can see the tip of a saw blade shaped and sharpened. The blade tip is bonded to the wheel with brazing.

The oldest technology is high carbon steel. In this case, the entire tool is made of steel with between 0.5% and 1% carbon content. The steel can be made soft through heat treatment process called annealing. The steel is heated to a high temperature and then cooled very slowly over many hours. Once annealed, the steel can be machined and worked to the shaped desired. Afterward, the steel is put through another heat treatment to re-harden by heating the steel and then cooling very quickly by quenching in oil or air. After the hardening, the cutting edge is sharpened and honed to the desired cutting edge.

Discover Cutting Tools On eBay Below:

24 mm 094 Manual Hand Shear Rebar ROD SQUARE FLAT Steel Metal Cutter Cutting
24 mm 094 Manual Hand Shear Rebar ROD SQUARE FLAT Steel Metal Cutter Cutting
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INTERNATIONAL CUTTING TOOLS HSS End Mill 7 16 DIA 4 Flutes New 22263 5519601
INTERNATIONAL CUTTING TOOLS HSS End Mill 7 16 DIA 4 Flutes New 22263 5519601
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Ingersoll Cutting Tools V MAX 3040457 6K5V 04R01 Lathe Carbide Inserts Mill USA
Ingersoll Cutting Tools V MAX 3040457 6K5V 04R01 Lathe Carbide Inserts Mill USA
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Champion Cutting Tools RB32 1 3 8 Mini Brute Magnetic Drill Press New
Champion Cutting Tools RB32 1 3 8 Mini Brute Magnetic Drill Press New
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Champion Cutting Tools AC50 2 1 8 RotoBrute Annular Cutter Magnetic Drill New
Champion Cutting Tools AC50 2 1 8 RotoBrute Annular Cutter Magnetic Drill New
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Champion Cutting Tools AC35 1 3 8 RotoBrute Magnetic Drill Press New
Champion Cutting Tools AC35 1 3 8 RotoBrute Magnetic Drill Press New
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Metal Cutting Tools Metcut N 1758 14370 Counterbore
Metal Cutting Tools Metcut N 1758 14370 Counterbore
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1 pc NEW NORTON SPG 424 PCD DIAMOND TIPPED INSERT MACHINE SHOP CUTTING TOOLS
1 pc NEW NORTON SPG 424 PCD DIAMOND TIPPED INSERT MACHINE SHOP CUTTING TOOLS
$17.49
New SCIENTIFIC CUTTING TOOLS TM14 2MM H New B12
New SCIENTIFIC CUTTING TOOLS TM14 2MM H New B12
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Regal Cutting Tools 017217AS 7 16 20H3 RGL L H Plug Tap
Regal Cutting Tools 017217AS 7 16 20H3 RGL L H Plug Tap
$25.49
Thd MillStraightIntSCTiALN7 16 18 SCIENTIFIC CUTTING TOOLS TM345 18A
Thd MillStraightIntSCTiALN7 16 18 SCIENTIFIC CUTTING TOOLS TM345 18A
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Cutting Tools Inc Carbide Step End Mill 5 8 Shank Dr00703 306 555 TiAIN 4OA
Cutting Tools Inc Carbide Step End Mill 5 8 Shank Dr00703 306 555 TiAIN 4OA
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10pcs 32mm Resin Fiber Cutting Discs Wheel Discs For Rotary Tools Grindeing NiJB
10pcs 32mm Resin Fiber Cutting Discs Wheel Discs For Rotary Tools Grindeing NiJB
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Task Tools 32043B 4 1 2  by 1 16  Metal Cutting Wheel 7 8 Inch Arbor Set of 2
Task Tools 32043B 4 1 2 by 1 16 Metal Cutting Wheel 7 8 Inch Arbor Set of 2
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10PCS SPKN1203 EDTR lathe turning cutting inserts carbide inserts cutting tools
10PCS SPKN1203 EDTR lathe turning cutting inserts carbide inserts cutting tools
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10PCS 16IR 15 ISO BP010 groove cutting inserts carbide inserts cutting tools
10PCS 16IR 15 ISO BP010 groove cutting inserts carbide inserts cutting tools
$9.90
10PCS 16IR 10 ISO BP010 groove cutting inserts carbide inserts cutting tools
10PCS 16IR 10 ISO BP010 groove cutting inserts carbide inserts cutting tools
$9.90
HD PRO Grade 40PC Tap Die Set Metric Cutting Create Threads Screws Metal Tools
HD PRO Grade 40PC Tap Die Set Metric Cutting Create Threads Screws Metal Tools
$64.88
1212 Inner Thread welding Carbide Lathe Tool Lathe Cutting Quick Change Tools
1212 Inner Thread welding Carbide Lathe Tool Lathe Cutting Quick Change Tools
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10pcs 3175mm22mm 2 flutes straight slot end mill CNC cutting tools router bit
10pcs 3175mm22mm 2 flutes straight slot end mill CNC cutting tools router bit
$19.89
10pc 4mm shank 22mm 2 flutes straight slot end mill CNC cutting tools router bit
10pc 4mm shank 22mm 2 flutes straight slot end mill CNC cutting tools router bit
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10 Pcs Ingersoll Cutting Tools SDLT120608TR IN5015 5801249 Lathe Carbide Inserts
10 Pcs Ingersoll Cutting Tools SDLT120608TR IN5015 5801249 Lathe Carbide Inserts
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10 Pcs Ingersoll Cutting Tools RHKW1605MOTN IN2005 5866460 Lathe Carbide Inserts
10 Pcs Ingersoll Cutting Tools RHKW1605MOTN IN2005 5866460 Lathe Carbide Inserts
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10 Pcs Ingersoll Cutting Tools RHKW1204MOTN IN2005 5805732 Lathe Carbide Inserts
10 Pcs Ingersoll Cutting Tools RHKW1204MOTN IN2005 5805732 Lathe Carbide Inserts
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1983 FIELD TOOL SUPPLY CO INDUSTRIAL CUTTING TOOLS CATALOG  5 PRICE LISTS
1983 FIELD TOOL SUPPLY CO INDUSTRIAL CUTTING TOOLS CATALOG 5 PRICE LISTS
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8 Pcs Ingersoll Cutting Tools RHKW1204MOTN IN2005 5805732 Lathe Carbide Inserts
8 Pcs Ingersoll Cutting Tools RHKW1204MOTN IN2005 5805732 Lathe Carbide Inserts
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10pcs CCMT120404 NN CCMT431 turning inserts carbide inserts cutting tools
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10 CCMT060204 NN CCMT 2151 lathe turning inserts carbide inserts cutting tools
10 CCMT060204 NN CCMT 2151 lathe turning inserts carbide inserts cutting tools
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5PCS Indexable Carbide Tipped Lathe Cutting Tools 3 8 10mm Facing Boring Tools
5PCS Indexable Carbide Tipped Lathe Cutting Tools 3 8 10mm Facing Boring Tools
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5PCS Indexable Carbide Tipped Lathe Cutting Tools 3 8 10mm Facing Boring Tools
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VICTOR Type Gas Welding  Cutting Kit Oxygen Oxy Acetylene Torch Welder Tools
VICTOR Type Gas Welding Cutting Kit Oxygen Oxy Acetylene Torch Welder Tools
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11pcs Hole Saw Kit Cutting Drilling Tools Set Wood Metal Cutter 19 64mm TA X8D8
11pcs Hole Saw Kit Cutting Drilling Tools Set Wood Metal Cutter 19 64mm TA X8D8
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Electric Cloth Cutter Fabric Leather Cutting Machine Round Scissors knife
Electric Cloth Cutter Fabric Leather Cutting Machine Round Scissors knife
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Thd MillInt ExtSCTiALN3 814 40 TPI SCIENTIFIC CUTTING TOOLS SPTM290LA
Thd MillInt ExtSCTiALN3 814 40 TPI SCIENTIFIC CUTTING TOOLS SPTM290LA
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Lot of 23 Machinist Tools Starrett Inside MIC Lufkin 0 1 MIC Cutting tools More
Lot of 23 Machinist Tools Starrett Inside MIC Lufkin 0 1 MIC Cutting tools More
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HQ 5pcs Single Flute CNC Router Cutting Arcylic PVC PCB Bits Tools 3175mm 28mm
HQ 5pcs Single Flute CNC Router Cutting Arcylic PVC PCB Bits Tools 3175mm 28mm
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MADISON CUTTING TOOLS Duodex Spade Indexable Inserts 0968 T 15 HSS Series II
MADISON CUTTING TOOLS Duodex Spade Indexable Inserts 0968 T 15 HSS Series II
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MADISON CUTTING TOOLS Duodex Spade Indexable Inserts 0984 T 15 HSS Series II
MADISON CUTTING TOOLS Duodex Spade Indexable Inserts 0984 T 15 HSS Series II
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11 PCS CARBIDE TIP TIPPED CUTTER TOOL BIT CUTTING SET FOR METAL LATHE TOOLING
11 PCS CARBIDE TIP TIPPED CUTTER TOOL BIT CUTTING SET FOR METAL LATHE TOOLING
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