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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