Abstract: Apparatus and methods associated with a center finder and marking tool are disclosed. A center finder and marking tool device includes a base that is configured to be positioned on a work piece surface. The base includes a bore hole. A body is disposed inside the bore hole and rotationally coupled to the base, wherein the body includes a first bore tunnel and a second bore tunnel. An optical center finder is disposed inside the first bore tunnel, and a marking tool is disposed inside the second bore tunnel.

Abstract: Apparatus and methods associated with a center finder and marking tool are disclosed. A center finder and marking tool device includes a base that is configured to be positioned on a work piece surface. The base includes a bore hole. A body is disposed inside the bore hole and rotationally coupled to the base, wherein the body includes a first bore tunnel and a second bore tunnel. An optical center finder is disposed inside the first bore tunnel, and a marking tool is disposed inside the second bore tunnel.

Abstract: In a valve disposed between a fluid supply and a socket of a chuck and configured to regulate the flow of the fluid to the socket. There is a seal screw for modulating a preload tension. This seal screw has a first sealing surface. The valve further includes a second sealing surface in opposing relation to the first sealing surface and an elastomer seal ring disposed between the first sealing surface and the second sealing surface. The valve is configured to form a seal between the first sealing surface, the second sealing surface, and the elastomer seal in response to a force less than or equal to the preload tension being exerted in line with the seal screw. In this manner, the valve is configured to allow the flow of the fluid between the first sealing surface and the second sealing surface in response to a force exceeding the preload tension being exerted in line with the seal screw.

Abstract: A fluid inducer having an inducer valve operable to open in response to a load is evaluated by an evaluation device. This device includes a fluid conduit for pressurizing the fluid inducer with a fluid and a pressure sensor that senses the pressure in the fluid conduit. In addition, the device includes an actuator for applying the load to the fluid inducer and a load sensor that determines the load in response to the sensed pressure.