The ZBot Power Draw Bar （ZBot电力拉杆）.pdf

The premier source of tooling, parts, and accessories for bench top machinists. The Z-Bot Power Draw Bar The Z-bot Power Draw Bar for mini mills is designed to work with the popular Tormach tooling system. This system employs an R8 or MT3 collet which remains in the spindle and accepts a ¾” straight shank undercut tool holder. It is designed for a high degree of repeatability and is particularly suited to CNC milling. However, it can also be used as a manual quick change tool system to great effect. The Tormach system is further enhanced by the use of a power draw bar which minimizes tool change time and effort. Driven by a shop compressor, and installed in less than an hour, the Z-bot Power Draw Bar brings a new level of convenience to milling and tool changing. Although a manual system, the Z-Bot Draw Bar can be easily upgraded to serve as a computer controlled component of the Z-Bot Automatic Tool Changing System for Tormach tooling by replacing the manual air valve with automatic solenoid controls. For more information on the Tormach Tooling System, visit www.LittleMachineS/Tormach Z-bot Power Draw Bar incorporates a stack of Belleville spring washers that preload the drawbar into the tightened position. The force of the Belleville spring washers draws the collet into the spindle and retains the tool holder. To release the tool holder, air from the compressor is directed through a four way valve to a double acting air cylinder. When the control handle is pushed downward, the air cylinder pushes the piston rod down, thereby moving the lever arm so that it bears on the top of the drawbar. The lever action multiplies the force of the air cylinder to provide more than 1000 lbs of force to overcome the action of the Belleville spring washers. This action releases the Tormach tool holder. Conversely, when the control handle is moved up, the piston rod is pulled up, which allows the lever arm to clea