Hollow Shank Drawbars & Grippers (HSK)
Optimized Clamping for Modern Machining
OTT-JAKOB’s Hollow Shank drawbars and grippers are specifically designed for modern toolholding standards, including HSK, KM, and Capto/PSC. With their lightweight construction and integrated force intensification, these systems ensure optimal tool retention with minimal impact on spindle dynamics. Perfect for shops looking to push the limits of speed and accuracy, OTT-JAKOB’s Hollow Shank solutions set the standard for reliable clamping in today’s high-performance environments.
Key Features
- Force Intensifying Mechanism | Integrated force intensifier delivers high clamping force while maintaining a lightweight, dynamic-friendly design.
- Lightweight Construction | Reduced mass minimizes the impact on spindle bearings and improves overall machine dynamics—ideal for high-speed machining.
- Precision Clamping | Ensures accurate tool retention and consistent performance across all major hollow shank standards (HSK, KM, Capto/PSC).
- Long Service Life | Maintenance-free components are built to last, even in demanding production environments.
- Optional Integrated Monitoring | Sensor packages available for tool presence detection and real-time clamping force monitoring.
Why Choose Hollow Shank Solutions from OTT-JAKOB?
Optimal Power and Torque Transmission
Thanks to the geometry of the OTT-JAKOB HSK-Clamping-Units, the gripper segments move in parallel, clamping the tool between two surfaces. This ensures optimal power and torque transmission.
Increased Pull-in Force
The design of the gripper segments and clamping cone enables reliable transmission and enhanced pull-in force.
Long Life Span
To provide maximum protection against wear, the surfaces of the gripper segments and clamping cone are coated with a high-quality material, ensuring low friction coefficients.
Hollow Shank Drawbar and Gripper Products
Type K
The Type K HSK is the most economical option among OTT-JAKOB's HSK-Clamping-Units. As a robust foundational model, it is ideal for typical applications. Its premium coating ensures durability and longevity.
Type B
Type B HSK was designed to fulfill the unique needs of the automotive sector. This high-efficiency clamping unit is engineered for rapid and frequent tool changes. The restricted guidance ensures parallel movement of the grippers even in challenging conditions. Its enhanced DLC coating provides maximum longevity, while the minimized friction results in a higher transmission ratio.
Type C
Type C HSK enables exceptionally quick tool-change times. The integrated holding function reduces waiting time during the tool-change process. Additionally, our top-grade, optimized DLC coating ensures a prolonged lifespan.
Type D
Similar to the Type B, this clamping unit offers an increased transmission ratio or pull-in force while maintaining the same internal contour.
Type BK
For the shortest possible spindle lengths, there are multiple options of Type B grippers but in a shorter format for the Type BK.