CUTTING INSTRUCTIONS
Fig A
Recommended: high-pressure water-jet cutting. Not recommended: thermal cutting with an oxyacetylene torch, arc-air, or plasma. Abrasive disc cutting is acceptable for blocks with less than 1” section thickness. • Secure the block in vise or clamp. • Notch the backing plate (Fig A) and the white iron a 1.25” depth opposite the plate (Fig B) . • Wrap the block in a rag, then carefully hit it with a soft-face hammer. Block should easily break at the notch.
Fig B
Fig C
WELDING INSTRUCTIONS
Make sure that the surface to which you’ll attach the block is clean and flat. • Clamp and tack-weld the block into position. • Stitch-weld, laying no more than 2” lengths per run, alternating ends or sides to minimize heat penetration. Do NOT deposit-weld within 0.25” from the joint (Fig C) . • Do NOT weld continuously. Such activity could cause warpage, delamination, or cracking. Do not exceed 400° F (200° C) temperatures. • Use low-hydrogen welding rods or gas-covered cored wire.
Fig D
Fig E
FORMING PROCEDURE
Fig F
For curves with a radius less than 12” or for inside curves, notch the steel backing plate opposite the “V.” This assists with forming (Fig D) . ( NOTE : JADCO HardChoc may crack during bending… this is normal.) • Thoroughly clean the surface to which you’ll weld HardChoc. • Tack-weld one end of the bar by a minimum of 0.75” in length per weld (Fig E) . • For outside curves, softly hammer the unwelded end to bend the bar to match the mating radius (Fig F) . • For inside curves, softly hammer the bar (starting at the center)
Fig G
to bend the piece to match the mating radius (Fig G) . • Stitch-weld as noted in the Welding Instructions.
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