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Twist drill bits. Especially in steel thicker than ¼ ... When energized, the magnet attaches the drill to smooth steel or iron surfaces. Mag drills can drill holes up to 6" in diameter in ...

But when a drill bit breaks off flush in a hole, there aren’t a lot of options, especially for a small bit. If the stars align, though, you may follow this video guide to dissolve the drill bit ...

whereas cobalt is typically used for harder materials like cast iron or stainless steel. Tungsten-carbide tipped (TCT) and ...

Iron roughnecks of today are fed pipe mechanically ... Pipe is strung together by twisting the box and pin pieces together. When a drill bit needs replacement or the well has been completed ...

If you choose, you can tin all the traces with solder and a soldering iron now. This actually makes drilling much easier because it helps to center the drill bit. Make sure to clean off excess ...