ST

ST Drill (ST1221JD-A Standard)

ST1221JD-A標準直徑氣動工具專用刀具

background
tool-ST Drill ST1221JD-A Cutters For Standard Diameter Pneumatic Tool
  • Norm：accord with NAS poeing aerospace maintance cutter
  • Application：When maintance worker finishes boring, they need pneumatic tool to do counterbore so that the air screw maymatch the aerospace material tighly to avoid air resistance and decrease air accidents. Detailed dimension is as below chart ...
  • Material： in - HSS
unit:in
ST1221JD-A HSS Piloted 100° Countersink
Order Code Flute Pilot
DIA.		 Body
DIA.		 Pilot
Length		 Body
Length		 Cutter
Path
Angle		 Threded
Shank		 Threded
Length		 THD.
Relief		 Locating
Angle
Z A B C F α1 THD D(in) -- α2
ST1221JD-A-065 3 0.0650 0.250 0.093 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-096 3 0.0960 0.250 0.108 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-126 3 0.1260 0.500 0.123 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-145 3 0.1450 0.500 0.140 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-158 3 0.1580 0.500 0.140 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-190 3 0.1900 0.500 0.155 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-203 3 0.2030 0.500 0.162 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-224 3 0.2240 0.500 0.170 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-238 3 0.2380 0.500 0.170 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-252 3 0.2520 0.625 0.188 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-266 3 0.2660 0.625 0.193 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-285 3 0.2850 0.625 0.204 0.75 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-314 3 0.3140 0.750 0.217 0.95 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-346 3 0.3460 0.750 0.233 0.95 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-375 3 0.3750 0.750 0.248 1.15 100° 1/4-28 0.312 0.03 120°
ST1221JD-A-411 3 0.4110 0.750 0.266 1.15 100° 1/4-28 0.312 0.03 120°
unit:inch
ST1221JD-A HSS Piloted 100° Countersink
Axial Rake Angle 5°
Tip Radial Rake Angle 4°
Prinary Clearance Angle 8°
Tip Gash Radian 0.01
Body Hole 0.13

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