Power Operated High Speed Chucks with Through Bore (3 & 4 Jaw)

PHNC – Power Operated Three Jaw Chuck with Through Bore

Microturners Power-Operated Hollow High-Speed Chucks have been specifically engineered for high-speed rotation on CNC lathes. The streamlined design of the PHNC Chucks provides additional benefits such as reduced weight and minimal inertia, both of which significantly enhance the dynamic performance of CNC machine spindles. These chucks boast a substantial through bore, making them particularly well-suited for bar machining applications. Furthermore, the weight of the base jaws and top jaws has been minimised in these chucks, resulting in not only reduced mass but also a lowered center of gravity, thereby minimising centrifugal losses.

In CNC machining, it’s essential for chucks to deliver substantial initial gripping force, and Microturners addresses this requirement by designing the chuck to operate with a high drawbar pull. Consequently, the wedge is designed to establish a substantial contact area with the base jaws.

Furthermore, the chuck body, base jaws, and hard jaws have been meticulously engineered to reduce weight without compromising other essential criteria.

Notably, the chuck body is forged from steel, and the guideways are hardened and ground for optimal performance.

Additionally, in larger sizes ranging from 250 mm to 500 mm, the chuck body has been recessed to remove a significant amount of material, further reducing its weight.

Four Jaw Hand Operated Independent Chuck

The GMT four-jaw chuck boasts several key attributes that set it apart from other four-jaw independent chucks on the market.

To begin with, the chuck body is meticulously crafted from forged medium-carbon steel, a material that undergoes a process of hardening and tempering to ensure both longevity and structural integrity. The base jaw slots within the body are precision-ground to exacting tolerances, enabling a snug sliding fit.

This precision engineering guarantees a play-free operation, remarkable load-bearing capability, and optimal wear resistance.
What truly distinguishes GMT’s independent four-jaw chuck system is the provision of separate jaws and reversible hard jaws. This design feature grants the flexibility to employ specialized hard jaws tailored to specific components.

The hard jaws are affixed to the base jaws via a tongue-and-tenon arrangement, enabling them to securely grip a wide range of components, whether on their outer diameter or inner diameter.

Furthermore, the base jaws are meticuously fashioned from alloy steel and subjected to case hardening. They are designed to be deeper and wider, thereby providing substantial bearing areas with reduced unit bearing pressure. This design enhancement significantly extends the chuck’s operational lifespan.

Another notable feature is the incorporation of square threads on the screws and the undersides of the base jaws. These threads engage more extensively, resulting in efficient transmission and conversion of applied torque. The screws themselves undergo heat treatment to prevent breakage, addressing a common concern in commercial-quality chucks.