Product Advantages
High-Precision Clamping
With no intermediate clamping components between the tool holder and the cutting tool, cumulative errors are eliminated. Radial runout precision typically remains ≤0.003 mm, while select high-end models can achieve precision as high as ≤0.001 mm. This exceptional concentricity effectively enhances the surface quality of the machined workpiece.
01
High Rigidity
Featuring a monolithic structure combined with uniform 360° circumferential clamping-devoid of weak points or moving parts-this design offers rigidity far superior to that of traditional ER collet-style tool holders. The optimized design integrates high rigidity with vibration-damping characteristics, effectively suppressing vibration during high-speed cutting to protect the machine spindle and extend tool life. Its performance is particularly outstanding during heavy-duty cutting operations and processes involving high metal removal rates.
02
Superior Dynamic Balance Performance
Featuring a compact and symmetrical structure devoid of extraneous sources of imbalance, standard models achieve a dynamic balance grade of G2.5 (at 25,000 rpm), while high-speed variants reach G1.0 (at 50,000 rpm), making them ideally suited for high-speed, precision machining applications.
03
Powerful Clamping Force
The thermal contraction of the tool holder during the cooling process generates immense radial clamping force, ensuring exceptional holding stability under high-speed and heavy-load conditions while effectively preventing tool slippage.
04
Exceptional Durability:
Constructed from specialized materials-such as stainless steel-characterized by a high coefficient of thermal expansion, the tool holder can withstand thousands of thermal clamping and unclamping cycles without compromising precision, thereby ensuring a long and reliable service life when operated correctly.
05
Manufacturing Process
Material Selection
Special stainless steel or heat-resistant tool steel with a high coefficient of thermal expansion is selected to ensure that the bore expands sufficiently during heating, generates adequate clamping force upon cooling, and withstands repeated thermal cycling without degradation.
Precision Machining
The components are shaped through processes such as turning and drilling; all functional surfaces undergo precision finishing to ensure high accuracy and high torque output. Heat treatment is applied to achieve a typical hardness of 50–54 HRC, thereby guaranteeing wear resistance.
Hot Mounting Process
The clamping section at the front of the tool holder is rapidly heated to 250–400°C using specialized shrink-fit heating equipment (electromagnetic induction heater). Once the bore expands due to thermal expansion, a clean, cylindrical-shank cutting tool is quickly inserted to the correct depth.
Cooling and Shrinkage
The tool holder is allowed to cool naturally or is cooled with the aid of compressed air; as the metal contracts, it generates a radial clamping force that securely grips the cutting tool. High-quality tool holders undergo an optimized, five-stage process-encompassing temperature-controlled preheating, constant-temperature holding, and directional cooling-to ensure long-term precision stability.
Hot Tags: shrink fit chuck, China shrink fit chuck manufacturers, suppliers, factory
