The EZ-PULLER self adjusting bar puller is used in CNC turning centers to provide automatic operation of the machine. The design of the EZ-PULLER allows the programmer or set-up person to change bar sizes in the machine without having to manually adjust the tool. The tool functions by means of polyurethane springs that provide force through a cam action of pivoting arms. These arms in turn apply force to friction-loaded circular grippers at the end of the arms.
The grippers rotate only under extreme load and have a unique serration geometry that is said to generate minimal stock penetration while providing maximum grip for a more accurate pull. To set the tool for gripping and pulling bar stock, the tool is moved in the “Z” axis until the grippers are at least .180” past the end of the stock, then moved in the “X” axis until the grippers are on centerline with the material being pulled. A standard pull cycle is then initiated. The manufacturer claims that pulls are more consistent due to the design of the tool.
The EZ-PULLER can accommodate the following bar stock sizes:
- Round Stock .125” to 1.625”
- Hexagonal Stock .125” to 1.375”
- Square Stock .125” to 1.000”
