--- --- APWORKSHOP.COM.AU EDGE FORMING BITS ROUND OVER Gives extra smooth chatter-free cuts due to precise tool geometry. Except for the bearing (TB11) this bit is the same as the beading bit T 602-640 Series. To convert it to the beading bit use ball bearing TB 9. Part # Description A inch A mm B inch B mm C inch C mm R inch R mm A$ T 502 B ROUND OVER 1/16 W/BRG 1/4 5/8 15.9 5/16 7.9 1-7/8 47 1/16 1.6 43.30 T 502 MB ROUND OVER 5/64 W/BRG 1/4 21/32 16.7 11/32 8.7 1-7/8 47 5/64 2 43.70 T 504 B ROUND OVER 1/8 W/BRG 1/4 3/4 19 1/2 12.7 2 50.8 1/8 3.2 44.40 T 504 MB ROUND OVER 4MM W/BRG 1/4 13/16 20.6 7/16 11.1 2 50.8 0.157 4 44.90 T 505 MB ROUND OVER 5MM W/BRG 1/4 7/8 22.2 7/16 11.1 2 50.8 0.197 5 44.90 T 506 B ROUND OVER 3/16 W/BRG 1/4 7/8 22.2 1/2 12.7 2 50.8 3/16 4.8 45.70 T 506 B 1/2 ROUND OVER 3/16 W/BRG 1/2 7/8 22.2 1/2 12.7 2-1/2 63.5 3/16 4.8 45.70 T 508 B ROUND OVER 1/4 W/BRG 1/4 1 25.4 1/2 12.7 2 50.8 1/4 6.35 46.90 T 508 B 1/2 ROUND OVER 1/4 W/BRG 1/2 1 25.4 1/2 12.7 2-1/2 63.5 1/4 6.35 46.90 T 510 B ROUND OVER 5/16 W/BRG 1/4 1-1/8 28.6 1/2 12.7 2 50.8 5/16 7.9 48.10 T 510 B 1/2 ROUND OVER 5/16 W/BRG 1/2 1-1/8 28.6 1/2 12.7 2-5/8 67 5/16 7.9 48.10 T 512 B ROUND OVER 3/8 W/BRG 1/4 1-1/4 31.8 5/8 15.9 2-1/4 57.1 3/8 9.5 49.30 T 512 B 1/2 ROUND OVER 3/8 W/BRG 1/2 1-1/4 31.8 5/8 15.9 2-5/8 67 3/8 9.5 49.30 T 516 B ROUND OVER 1/2 W/BRG 1/4 1-1/2 38.1 3/4 19 2-1/4 57.1 1/2 12.7 50.50 T 516 B 1/2 ROUND OVER 1/2 W/BRG 1/2 1-1/2 38.1 3/4 19 2-3/4 70 1/2 12.7 50.50 T 520 B 1/2 ROUND OVER 5/8 W/BRG 1/2 1-3/4 44.5 7/8 22.2 3-1/4 82 5/8 15.9 53.90 T 524 B 1/2 ROUND OVER 3/4 W/BRG 1/2 2 50.8 1 25.4 3-1/4 82 3/4 19 61.60 T 528 B 1/2 ROUND OVER 7/8 W/BRG 1/2 2-1/4 57.1 1-5/64 27.4 3-1/2 89 7/8 22.2 67.10 T 532 B 1/2 ROUND OVER 1" W/BRG 1/2 2-1/2 63.5 1-1/4 31.8 3-5/8 92 1 25.4 72.60 T 540 B 1/2 ROUND OVER 1 1/4 W/BRG 1/2 3 76.2 1-15/32 37.3 3-3/4 95 1-1/4 31.8 82.50 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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WITH BALL BEARING GUIDE ![]()

CARBIDE TIPPED
TWO FLUTES WITH BALL BEARING GUIDE TB 11
Shank: 1/2 inch (12.7 mm) is shown in the part number, otherwise is 1/4 inch (6.35 mm ) 