龙彩国际|彩票

                                  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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