9/2/2014

Power Drawbar Features Intense, Spring-Force Mechanism

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Advanced Machine & Engineering introduces the OTT-JAKOB power drawbar for toolholding, which features power-off clamping and zero load on spindle bearings during tool change.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Related Suppliers

Advanced Machine & Engineering introduces the OTT-JAKOB power drawbar for toolholding, which features power-off clamping and zero load on spindle bearings during tool change.

The cutting tool is held securely in the spindle taper with gripper fingers that are pulled into the taper with the spring pack of the drawbar. The pull-in force multiplies from the intensified spring force mechanism and is applied to the clamping sleeve to push the balls outward. The compact angle design of the clamping ring and cylinder shoulder is said to increase the spring force 300 percent, and with minimal rotating mass. The cam inside the spindle then closes the gripper fingers and the tool is securely locked.

The power-off design requires pressure applied to the hydraulic piston for transmission through the rod to push the clamping sleeve down, which unlocks the intensifying mechanism. This means that a loss or reduction in hydraulic pressure will not release the tool. Only after clearing the cam, the gripper fingers open and the face of the holder ejects the tool with a controlled stroke.

Hand holding a crystal ball

We’d rather send you $15 than rely on our crystal ball…

It’s Capital Spending Survey season and the manufacturing industry is counting on you to participate! Odds are that you received our 5-minute Metalworking survey from Production Machining in your mail or email. Fill it out and we’ll email you $15 to exchange for your choice of gift card or charitable donation. Are you in the U.S. and not sure you received the survey? Contact us to access it.

Help us inform the industry and everybody benefits.

RELATED CONTENT

  • Consider a Systems Approach to Tooling

    How parts are processed is the key to reducing cycle times, especially when using Swiss-type and turn-mill machines.

  • Taking the Heat Off Live Tooling

    As live tooling becomes more popular in many CNC turning centers, the use of tooling with sealed bearing performance is becoming a challenge for shops that produce components in high volumes or with lengthy cycle times.

  • Chip Control

    I discovered that chip control actually means controlling chips as they are being cut off of a workpiece.

Resources