Wrench

Spanner - Hand tools, widely used during fitting and assembly work for wrap and unscrew bolts, nuts and other screw connections. The wrench has a throat or contour protrusions and recesses, which can capture products. The main varieties: simple wrenches with one-sided and two-sided heads, lever, socket, sliding, rozhkovy, combined, cap, radius, pipe. The most convenient ones are torque wrenches, controlled and limit, used to assemble critical screw connections (instruments, motors, machine tools). Controlled wrenches have a torque value indicator, when you reach a predetermined value, you will observe a light or sound signal. To prevent threading, the limit wrench is automatically turned off when the specified torque is reached. Wrenches are widely used to automate assembly as well as increase productivity (see Wrench).