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The VDI Hydraulic Driven Holder is a high-performance tool holding solution designed specifically for CNC turning centers and multi-tasking machines that use the VDI turret interface. As a subcategory under the broader VDI Driven Tool Holder & Static Tool Holder product line at Jiaxing XiRay Industrial Technology Co., Ltd, this holder combines the rigid and standardized VDI coupling system with hydraulic clamping technology to deliver superior runout accuracy and vibration damping in driven (live) tooling applications.
The VDI interface follows internationally recognized DIN standards, which ensures direct compatibility with a wide range of turret systems across major machine brands. XiRay's VDI product family includes VDI DIN 1809, VDI DIN 5480, VDI DIN 5482, VDI MT, and VDI DIN 69880 variants. The hydraulic driven holder sits at the top of this lineup in terms of clamping precision, making it the preferred choice when surface finish and dimensional accuracy are non-negotiable.
Unlike collet-based or mechanical clamping systems, the hydraulic chuck mechanism inside a VDI hydraulic driven holder uses an enclosed oil-filled chamber surrounding the tool shank bore. When the operator tightens a hex key screw, it pressurizes the chamber, causing the bore wall to contract uniformly around the tool shank. This 360-degree contact generates a consistent and balanced clamping force with no stress concentration points. The result is a runout accuracy of ≤0.003 mm, far superior to standard ER collet or power collet alternatives commonly used in live tool holders.
This design also provides inherent vibration damping. The hydraulic fluid layer between the bore wall and tool shank absorbs micro-vibrations generated during cutting, which directly improves workpiece surface quality and reduces chatter, particularly in finishing operations such as reaming, fine boring, and high-speed milling.
XiRay's VDI hydraulic driven holders are engineered to accommodate tool shanks in a clamping range of 3 mm to 32 mm depending on model. The balancing grade reaches G2.5 at 25,000 RPM, making them compatible with high-speed live tooling operations without inducing unacceptable centrifugal imbalance. The VDI shank sizes follow DIN 69880 standards, available in common sizes such as VDI 20, VDI 25, VDI 30, VDI 40, and VDI 50, covering most turret configurations on the market.
These holders support both radial and axial driven configurations. The radial type positions the tool perpendicular to the turret face, suitable for cross-drilling, radial milling, and thread tapping on cylindrical workpieces. The axial type positions the tool parallel to the spindle axis, used for face milling, face drilling, and center operations. XiRay's product range includes the Radial Axial Milling and Drilling Head, Axial Milling and Drilling Head, and Radial Milling and Drilling Head under this VDI hydraulic driven holder category, providing a complete solution for complex turning-milling compound operations.
In the automotive sector, VDI hydraulic driven holders are used in high-volume production of engine components and transmission parts where cycle time and repeatability are critical. In medical device manufacturing, the ≤0.003 mm runout guarantee ensures that implant surfaces and instrument geometries meet strict quality standards. Aerospace precision parts processing and electronics micro-machining also benefit from the stability this holder class provides.
For manufacturers looking to expand tooling capability beyond standard turning, the VDI hydraulic driven holder integrates seamlessly into the broader XiRay tooling ecosystem, which also includes CNC Numerical Control Tools, PSC Tool Holder Series, Angle Head solutions, and Precision Pneumatic Grippers. This cross-compatibility allows machine shops to standardize on a single supplier while covering a wide spectrum of machining requirements.
Jiaxing XiRay Industrial Technology Co., Ltd is headquartered at No. 693, Zhenyuan Rd, Economic Development Zone, Jiaxing, Zhejiang Province, China. For technical inquiries or product selection support, contact the team at sales@xiray-tools.com or call +86-573-83996043.
