ST

ST Drill (ST1221JD-A Standard)

ST1221JD-A標準直徑氣動工具專用刀具

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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-CO4
unit:in
ST1221JD-A HSS Co 4-8% 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
Total
Length
Z A B C F α1 THD D(in) -- α2 L
ST1221JD-A-065 3 0.0650 0.250 0.093 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-096 3 0.0960 0.250 0.108 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-126 3 0.1260 0.500 0.123 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-145 3 0.1450 0.500 0.140 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-158 3 0.1580 0.500 0.140 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-190 3 0.1900 0.500 0.155 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-203 3 0.2030 0.500 0.162 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-234 3 0.2340 0.500 0.170 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-238 3 0.2380 0.500 0.170 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-252 3 0.2520 0.625 0.188 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-266 3 0.2660 0.625 0.193 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-285 3 0.2850 0.625 0.204 0.75 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-314 3 0.3140 0.750 0.217 0.95 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-346 3 0.3460 0.750 0.233 0.95 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-375 3 0.3750 0.750 0.248 1.15 100° 1/4-28 0.312 0.03 120° 0.375
ST1221JD-A-411 3 0.4110 0.750 0.266 1.15 100° 1/4-28 0.312 0.03 120° 0.375
unit:inch
ST1221JD-A HSS Co 4-8% Piloted 100° Countersink
Axial Rake Angle
Tip Radial Rake Angle
Prinary Clearance Angle
Tip Gash Radian 0.01
Body Hole 0.13

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