Compact Drawbar Enables Power-Off Clamping
Advanced Machine & Engineering offers the OTT-Jakob power drawbar for toolholding.
Share
Takumi USA
Featured Content
View More
Advanced Machine & Engineering offers the OTT-Jakob power drawbar for toolholding. Designed for power-off clamping in a compact design with minimal rotating mass, the drawbar is said to provide increased spring force while requiring lower tool-release force. According to the company, there is no load on the spindle bearings during tool change.
The cutting tool is held securely in the spindle taper with gripper fingers, which are pulled into the taper with the spring pack of the power drawbar. The pull-in force is multiplied by an intensifying mechanism, and the spring force applied to the clamping sleeve pushes the balls outward. The angle design of the clamping ring and cylinder shoulder increase the spring force by as much as 300 percent, the company says. The cam inside the spindle closes the gripper fingers to securely lock the tool, and according to the company, the tool will not come loose if there is a loss or reduction in hydraulic pressure. The power-off design requires pressure applied to the hydraulic piston and transmitted through the rod to push the clamping sleeve down to unlock the mechanism. After clearing the cam, the gripper fingers open and the face of the holder ejects the tool with a controlled stroke.
Related Content
-
Simulation and Tooling Secure High-Value Work
Simulation software and careful attention to tooling parameters have enabled Major Tool to take on ambitious projects with its complex machinery.
-
How to Troubleshoot Issues With Tool Life
Diagnosing when a tool is failing is important because it sets an expectation and a benchmark for improvements. Finding out why gives us a clue for how to fix it.
-
Five Common Mistakes Shops Make with ER Collets (And How to Prevent Them)
Collets play a crucial role in the machining process, so proper tool assembly and maintenance is important. Here are five potential pitfalls to avoid when using ER collets.
