Drill bit manufacturers have substantially improved polycrystalline diamond (PCD) cutters and drag bit designs since their introduction in 1972. PCD drill bits are now approaching the rolling cone ...

Throughout the history of drilling, “Heavy Metal” (not to be confused with the music genre) has been the preferred cutting element for grinding/crushing/chipping formations on literally the leading ...

Engineering giant Costain has given traffic cones a hi-tech makeover in a bid to reduce road congestion and improve safety for workers. The remote-controlled bollards, dubbed “robo-cones”, can be ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This solid wooden model is stained ...

Threaded penetration cone draws cutting blades down into stumps and gear-reduction drive allows a compact utility loader to effectively cut stumps of any size The low speed auger leaves sites easy to ...

"A good lightweight design that a beginner can build uses a tubular steel tailpipe and intake welded to a combustion chamber," Cottrill says. "The chamber is a long cone (the chamber wall) and a blunt ...