![JB-H308 [BLANK]](https://cdn11.bigcommerce.com/s-69ah84/images/stencil/1280x1280/products/1279/5912/368350__29814.1775860613.png?c=2 "JB-H308 [BLANK]")
![JB-H308 [BLANK]](https://cdn11.bigcommerce.com/s-69ah84/images/stencil/500x659/products/1279/5912/368350__29814.1775860613.png?c=2 "JB-H308 [BLANK]")
8" Built-In Jaw Boring Open-Center Hydraulic Chuck | BLANK
Application:
The JB-H308 is purpose-built for turning operations that require fast, repeatable soft jaw boring with high clamping accuracy. Ideal for CNC lathes and turning centers running high-mix production, tight tolerances, or frequent part changeovers, the JB-H308 reduces setup time by allowing jaws to be bored directly in the chuckwithout removing the chuck or changing the setup. Its open-center body supports bar work and through-spindle machining, making it a versatile solution for both production and precision environments.
Product Features:
The JB-H308 features Samchully integrated JB-CORE jaw boring system, enabling controlled soft jaw boring in 0.1mm increments for precise gripping diameters and repeatable results. By shaping the jaws after clamping, the chuck minimizes soft jaw wear, improves part accuracy, and extends jaw service life. Designed as a true first-of-its-kind solution, the JB-H308 remains 100% compatible with standard power chuck operationdelivering advanced jaw boring capability without changing familiar processes. Built from high-strength alloy steel with precision-hardened internal components, the JB-H308 is engineered for reliable clamping performance and smooth, balanced rotation at elevated spindle speeds.
