Phone number
Terms
Premium carbide grade provides excellent wear resistance when cutting cast aluminum, bronze, cast and ductile irons, titaniums, graphite, fiberglass, hard plastics and non-ferrous metals. Not recommended for soft steels.
  • Aircraft extension drills are used principally for the drilling of holes in inaccessible places which cannot be reached with regular length drills.
  • 135° split point per NAS-907-P3 improves accuracy and decreases power consumption.
  • 2 to 2.5 times faster speed than standard high speed steel with better hole finish.
  • 6” overall length, threaded shank adapters and eight facet point available upon request.
  • Right hand spiral, right hand cut, heavy duty high speed steel bodies.
  • Allow 2.5 x Ø up to 1/4” (6.35mm), 2 x Ø up to 7/16”) 11.1mm) and over 7/16” allow 1.5 x Ø of flute for chip exit.
  • Fractional sizes are double margin. Letter/wire are single margin.
  • Shank Ø = Cutting Ø
76 - 82 of 82 | Results Per Page | View | Unit of Measure
1 2 3 4 

Item #

Cutting Ø "D" (Inch/Wire)

Cutting Ø "D" (mm)

Dec. Equiv. (Inch)

Flute Length "B" (Inch)

Flute Length "B" (mm)

Usable Flute at Full Regrind "F" (Inch)

Usable Flute at Full Regrind "F" (mm)

12904130 N/A Z N/A 10.49 N/A 0.4130 N/A 4 1/16 N/A 103 N/A 3.2000 N/A 81
12904219 N/A 27/64 N/A 10.716 N/A 0.4219 N/A 4 1/16 N/A 103 N/A 3.2000 N/A 81
12904375 N/A 7/16 N/A 11.113 N/A 0.4375 N/A 4 1/16 N/A 103 N/A 3.2000 N/A 81
12904531 N/A 29/64 N/A 11.509 N/A 0.4531 N/A 4 5/16 N/A 110 N/A 3.4000 N/A 86
12904688 N/A 15/32 N/A 11.908 N/A 0.4688 N/A 4 5/16 N/A 110 N/A 3.4000 N/A 86
12904844 N/A 31/64 N/A 12.304 N/A 0.4844 N/A 4 1/2 N/A 114 N/A 3.5000 N/A 89
12905000 N/A 1/2 N/A 12.7 N/A 0.5000 N/A 4 1/2 N/A 114 N/A 3.5000 N/A 89
76 - 82 of 82 | Results Per Page | View | Unit of Measure
1 2 3 4