SAN JOSE – The Santa Clara Valley Transportation Authority said Monday it authorized the purchase of the transit tunnel boring machine to complete the five-mile underground section of the VTA BART ...

The state-of-the-art boring machine will dig the largest single-bore transit tunnel in the world, nearly 54 feet in diameter. It's capable of digging 30 to 40 feet a day, according to VTA. "There's no ...

ALLIED MACHINE AND ENGINEERING reported the expansion of its Wohlhaupter boring tools offering with the launch of the 465 (464) series of fine boring heads. These internally balanced fine boring heads ...

Kennametal’s asymmetric line-boring system increases machining robustness, process speeds, and bore quality, and reduces tool maintenance and handling. Precision is vital in manufacturing many ...

Dialing in fine boring heads with just a Vernier dial screw can be tricky. When you’re trying to hold a bore to a few tenth’s, it can often take multiple test cuts before getting the ID tolerance just ...