| OCR Text |
Show 26 These pairs of major group and minor group form separate tool tables. Mor tool groups may be added to the library later. Tool table for each pair of major group and minor group is represented as a list of tool records. Each tool record is represented as a list of tool data. The tool data are pairs of tool parameters and their values which specify dimension of a tool. A typical record for a twist drill is as follows: ((Material HSS) (Finish Black) (Dia 0.375) (ShDia 0.375) (Len 3.625) (OvLen 5.0) (Point 135-Split)) This refers to a twist type drill made of high speed steel with a black oxide finish with inch dimensions and a cutting diameter of 0.375, a shank diameter of 0.375 , a flute or cutting length of 3.625, an overall length of 5.0 inches and a slit point with an included angle of 135 degrees. As most cutters have a right hand spiral for the flutes, are right hand cutting, have the standard spiral angle, and are made to inch dimensions, these fields could be omitted and replaced with default values. A typical record for a counterbore is as follows: ((Material HSS) (Finish Bright) (Measure Inch) (FlNum 3) (Dia 0.5937) (ShDia 0.500) (Len 1.25) (OvLen 5.125)) This refers to a counterbore made of high speed steel with a bright or polished finish with inch dimensions and having 3 flutes, a cutting diameter of 0.5937 inch, a flute or cutting length of 1.25 inches, a shank diameter of 0.5 inch, and an overall length of 5.125 inches. Optional fields include a cutter radius and either a diameter for an integral pilot or the diameter of the hole for an interchangeable pilot. A typical record for a counterbore with an integral pilot is as follows: ((Material HSS) (Finish Bright) (Measure Inch) (FlNum 2) (Dia 0.3125) (Pilot 0.265) (ShDia 0.312) (Len 0.875) (OvLen 4.5)) |
