New Pack of 10 HSS Wire Gauge Twist Drill Bits #78 For Metal Working & Drilling

Product Description-

    • 10pc high speed twist drill bits great for metal smiths, metal working & drilling
    • Ideal for drilling ferrous metals, tough casting sand forgings, working hardened stainless steel and other hard steels and tough high tensile strength nonferrous metals like titanium
    • These will not lose their hardness with excessive heat build up
    • Estimate shank size: 0.42mm/0.0165in
    • Size #78
    • Pack of 10 in a plastic tube
    • Part #8278HDB
    • Reference chart for all bits size range (#50-#80) - 
    #50       1.71mm/0.067in
    #51       1.54mm/0.061in
    #52       1.50mm/0.059in
    #53       1.37mm/0.054in
    #54       1.32mm/0.052in
    #55       1.27mm/0.050in
    #56       1.13mm/0.044in
    #57       1.06mm/0.0415in
    #58       1.01mm/0.040in
    #59       1.01mm/0.040in
    #60       0.95mm/0.0375in
    #61       0.94mm/0.037in
    #62       0.93mm/0.0365in
    #63       0.92mm/0.036in
    #64       0.89mm/0.035in
    #65       0.88mm/0.0345in
    #66       0.81mm/0.032in
    #67       0.79mm/0.031in
    #68       0.76mm/0.030in
    #69       0.72mm/0.0285in
    #70       0.69mm/0.0275in
    #71       0.62mm/0.0245in
    #72       0.61mm/0.024in
    #73       0.58mm/0.023in
    #74       0.56mm/0.022in
    #75       0.52mm/0.0205in
    #76       0.49mm/0.019in
    #77       0.44mm/0.0175in
    #78       0.42mm/0.0165in
    #79       0.37mm/0.0145in
    #80       0.30mm/0.012in


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