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The King of Manual Lathes: The Herbert Capstan.

Vertical milling machine

A 190-ton haul truck front A-frame came in with a crack at the ball joint socket weld on the lower right arm. The ball joint socket is a forged insert welded into the fabricated A-frame, and the weld between the forging and the high-strength A-frame plate had cracked 210 degrees around the circumference — more than half the weld gone. The remaining 150 degrees was carrying the full suspension load and was showing fatigue pitting at the toe. The A-frame is T-1 equivalent high-strength plate and the socket insert is 4140 forged steel — a dissimilar joint that requires a careful buttering sequence before the filler rod can bridge the two materials. I removed the socket insert completely by cutting the remaining weld, cleaned both mating faces to bright steel, and ran PT on the A-frame socket opening to confirm no cracking had extended into the plate. Clean. I buttered the 4140 forging face with two layers of E309L MIG wire to provide a compatible buffer deposit, then refitted the socket with the correct gap and alignment. Preheat was 400°F across the full A-frame arm section, maintained with induction coils and thermocouple data logging. I welded the full circumference joint with E11018-M, GTAW root pass at 90 amps for maximum root control on the dissimilar joint, then E11018-M SMAW fill and cap in the 2G position, walking 90-degree segments. Post-weld PWHT was performed at 1,100°F for 2 hours using resistance heating pads, ramp rates controlled at 150°F per hour. Phased array UT on the completed circumferential weld showed full fusion at 360 degrees with zero indications. The A-frame was load tested on a ramp fixture at 120 percent of rated suspension load and held for 30 minutes with a load cell recording. No movement, no indication of distortion. The truck returned to haul duty loaded on the next shift.

Antique hand-operated drill press featuring cast-iron construction, exposed gear mechanisms, brass flywheel detailing, and a manually driven crank system mounted on a wooden support frame. The vintage engineering tool reflects exceptional mechanical craftsmanship, precision machining design, and historical industrial manufacturing techniques. Its decorative metalwork, functional gearing, and timeless workshop aesthetic showcase the durability, artistry, and mechanical innovation of early metalworking equipment and traditional fabrication technology.