Specifications include, but are not limited to: 9.1The 3’ underbody blade shall be a shielded carbide inserted underbody blade 7/8"x5"x3'x1-1/2 ga with 5/8" punched counter sunk square holes, backside beveled. Shielding should be made with a hardened material like Hard Ox 100 or equal. 9.2The 4’ underbody blade shall be a shielded carbide insert underbody blade 7/8"x5x4'x1-1/2 ga with 5/8" punched counter sunk square holes, backside beveled. Shielding should be made with a hardened material like Hard Ox 100 or equal. 9.3Tungsten carbide inserts must be grade YG11C-N 100% virgin tungsten carbide. 9.4Blade shall be SAE 1020 flat hot rolled steel. 9.5Carbide insert-bolt holes 1.5" from top. 9.6Tolerance for hole spacing be (+/-) 1/16", non-accumulative, from center to center, across full length of blade. 9.7The groove for the carbide inserts shall be milled in the center of blade edge. 9.8The tungsten carbide insert shall be trapezoidal in design, with the following dimensions: Length: 1"nominal Width: .365" (+/-) .005" Height: .635" (+/-) .005" Top Angle: 25 degree (+/-) 1 degree with nose radius of 1/16" minimum. 9.9Tungsten carbide insert shall be of a grade containing 11-13% cobalt. Tungsten carbide shall be made of virgin material.
