The vises are available in 4-in. and 6-in. sizes, and produce a clamping pressure of 4,000 lb. Each vise can hold two parts, and the jaws have a total clamping travel of 0.25 in. to 0.125 in. per clamping station. Twin Vises are available individually or in turnkey automated systems with several vises mounted on Bock locator plates with all tubing and valving installed.
Block Workholding Inc., Ford City, Pa., (www.bockworkholding.com) says its hydraulic Twin Vises shorten loading times and reduce operator fatigue in high-production, short-cycle applications. The manual or machine-programactivated systems are single acting with a spring return. The company says that the systems' activation simplifies connections, increases reliability and makes the system compact. All hydraulic elements are contained within a clamping mechanism that the company says can be exchanged in minutes.