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As shown in the figure, tightening the bolt results in a wedge being driven up against a sleeve, which expands it and causes it to compress against the material it is being fastened to. displacement controlled: usually consist of an expansion sleeve and a conical expansion plug, whereby the sleeve is internally threaded to accept a threaded ...
Powder-actuated tools come in high-velocity and low-velocity types. In high-velocity tools, the propellant charge acts directly on the fastener in a process similar to a firearm. Low-velocity tools introduce a piston into the chamber. The propellant acts on the piston, which then drives the fastener into the substrate.
A hydraulic torque wrench is a power tool designed to exert torque on a fastener to achieve proper tightening or loosening of a connection through the use of hydraulics. A torque wrench is applied to the nut either directly or in conjunction with an impact socket. Hydraulic torque wrenches apply a predetermined, controlled amount of torque to a ...
A bush-hammered concrete surface. Bush hammers exist in many forms, from simple hand-held hammers to large electric machines, but the basic functional property of the tool is always the same – a grid of conical or pyramidal points at the end of a large metal slug.
A nutdriver or nut driver is a hand tool for tightening or loosening nuts and bolts. It essentially consists of a socket attached to a shaft and cylindrical handle and is similar in appearance and use to a screwdriver. [1] They generally have a hollow shaft to accommodate a shank onto which a nut is threaded.
Unimog pushing a "Spindle Precision Wrenching Unit" used for automatic and synchronous tightening and loosening of rail fastening systems. Concrete sleepers are made upside down in moulds, several sleepers long. Pandrol clip bases or other fittings are inserted into the moulds. Pre-stressed steel reinforcing bars are installed in these moulds ...