betvlctor伟德国际

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          Contact Us
          Hammond & Company Ltd
          Finway Road
          Hemel Hempstead
          Hertfordshire
          HP2 7PT
          England
          +44 (0)1442 212 211
          +44 (0)1442 252 003
          Send a Message
          We'll respond within 48 business hours

          Drill Part Number System


          Diagram

          Field 1 Drill Type


          G Gun drill
          E? Gun reamer
          F? Speedfeed
          S? Speedbit
          V? Ventec
          P? Proten
          X? Special

          Field 2 Standard or Coated


          M? Standard metric
          C ? Coated metric
          I? Standard imperial
          K ? Coated imperial

          Field 3-7 Diameter


          Decimal point between fields 4 & 5, size to 3 decimal places

          Fields 8 Contour (Gun drills only. All other drills are A)


          A - C1? Standard
          C - C2? Grey Cast Iron
          D - C3? Gun boring
          E - C4? Crankshafts, Aluminium > dia ? 4.0
          X - Special

          Fields 9-12 Length (No decimal point)


          Gun Drills - Overall length
          Speedfeed -?Flute length
          Ventec?- Flute length
          Speedbit?- Flute length

          Fields 13&14 Driver Type (See separate list for driver codes)


          ND? No driver
          RT? Re-tip
          RD? Reduction
          RG? Re-grind
          MO? Modification

          Fields 15 Workpiece Material


          A? Steel/Non ferrous/Cast Iron
          H? Grey Cast Iron
          T? Cast Iron (high phosphorus content)
          M? Stainless Steel, High Si content aluminium

          Field 16 Nose Grinds


          A? NG6/NG8 Standard
          B? NG4 Aluminium
          E? NG13 Grey Cast Iron
          F? NG73 Stack
          G? NG80 Flat bottom
          H? NG82 Inconel
          J? NG83 Crankshaft
          K? NG86 Wood
          X? Special


          Diagram

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