--- --- APWORKSHOP.COM.AU EDGE FORMING BITS BULL NOSE RADIUS A time saving bit for rounding over both sides of a board in one pass. Part # Description A inch A mm B1 inch B1 mm B2 inch B2 mm C inch C mm A$ TBN 2 B BULL NOSE RADIUS BIT W/BRG 1/4 25/32 19.8 1/2 12.7 5/32 4 2 50.8 48.00 TBN 2 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 25/32 19.8 1/2 12.7 5/32 4 2-1/2 63.5 48.00 TBN 4.5 MB 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 51/64 20.4 1/2 12.7 11/64 4.5 2-1/2 63.5 49.00 TBN 5 MB 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 53/64 20.9 1/2 12.7 13/64 5 2-1/2 63.5 49.00 TBN 3 B BULL NOSE RADIUS BIT W/BRG 1/4 27/32 21.4 1/2 12.7 7/32 5.5 2 50.8 49.30 TBN 3 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 27/32 21.4 1/2 12.7 7/32 5.5 2-1/2 63.5 49.30 TBN 4 B BULL NOSE RADIUS BIT W/BRG 1/4 29/32 23 3/4 19 9/32 7.1 2-3/8 60 50.50 TBN 4 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 29/32 23 3/4 19 9/32 7.1 2-3/4 70 50.50 TBN 6 B BULL NOSE RADIUS BIT W/BRG 1/4 1-1/32 26.2 3/4 19 13/32 10.3 2-3/8 60 54.10 TBN 6 B 1/2 BULL NOSE RADIUS BITW/BRG 1/2 1-1/32 26.2 3/4 19 13/32 10.3 2-3/4 70 54.10 TBN 8 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 1-5/32 29.4 1 25.4 17/32 13.5 3 76 56.40 TBN 10 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 1-9/32 32.6 1-3/32 27.8 21/32 16.7 3-1/4 82 59.50 TBN 12 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 1-13/32 35.8 1-1/4 31.8 25/32 19.8 3-1/4 82 63.00 TBN 15 B 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 1-21/32 42 1-1/2 38.1 1-1/32 26.2 3-5/8 92 66.40 TBN 32 MB 1/2 BULL NOSE RADIUS BIT W/BRG 1/2 1-57/64 48 1-39/64 40.6 1-17/64 32 3-7/8 98.4 70.00 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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CARBIDE TIPPED
TWO FLUTES WITH BALL BEARING GUIDE TB 8
Shank: 1/2 inch (12.7 mm) is shown in the part number, otherwise is 1/4 inch (6.35 mm ) 
Note: B2 = Diameter of cut, so cut radius = 1/2 of B2