--- --- APWORKSHOP.COM.AU PILOT PANEL BITS COMBINATION FLUSH TRIMMING & DRILLING This bit is used extensively to drill and trim sheet aluminium. Part # Description A inch A mm B inch B mm C inch C mm A$ HSF 1508 COMBINATION 1/4 S/F 1/4 1/4 6.35 3/4 19 2-3/4 70 17.10 HSF 1512 3/8 COMBINATION 3/8 S/F 3/8 3/8 9.5 1 25.4 3 76 19.70 M= Metric Size, H= High Speed Steel, T= Carbide Tipped or Solid Carbide, A= Carbide Tipped on Nose (Pilot Panel Bits) B= Ball Bearing Guide, E/C = End Cutting, S = Single Flute, X= Long series bits not warrantied against breakage, XX= Extra long series bits not warrantied against breakage. Where bits are available in various arbor/shank diameters, suffix indicates: 5/16 inch, 3/8 inch, 1/2 inch, 10 mm (otherwise 1/4 inch). In diagrams, A= Cutting Width, B= Flute Length, C= Overall Length (includes bearing and screw), R, R1 or R2 = Radius of Cut, E= Pilot or Bearing Width, G= Depth of Cut, Bevel = Bevel, ID= Inside Diameter, T= Wood Thickness. ![]()
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Router Bits
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SPIRAL DOWNCUT ![]()

HIGH SPEED STEEL WITH PILOT
Shank: 3/8 inch (9.5 mm) is shown in the part number, otherwise is 1/4 inch (6.35 mm). 