12 Inch Self Centering Machine Vise 300 mm

The Engeetech 12-Inch Self-Centering Machine Vise (300 mm) is a precision-clamping solution, engineered to deliver speed, accuracy, and repeatability for a wide variety of machining, metalworking, and workshop applications. Designed to securely grip workpieces and automatically centre them, this vise simplifies the setup process, reduces manual adjustments, and ensures consistent alignment — especially valuable when performing repetitive jobs or batch operations.

Key Features & Benefits

Self-centering Mechanism: All jaws move simultaneously when tightened or released — driven by an internal scroll mechanism — automatically centering the workpiece without the need for individual jaw adjustments.

300 mm (12-inch) Jaw Opening: Generous opening size accommodates larger workpieces — offering flexibility for a range of sizes and shapes.

Strong & Stable Grip: The synchronized movement of jaws ensures an even clamping force, minimizing deformation, slippage, or misalignment during machining.

Time-Saving & Efficiency: Automatic centering dramatically reduces setup time per job. Ideal for workshops, production runs, or tasks requiring frequent changeovers.

Versatile Use-Cases: Suitable for a variety of operations — from turning, drilling and milling to fixture work. Especially useful when multiple workpieces require consistent centering and alignment.

How It Works
At the heart of the self-centering design is a scroll-plate (or scroll gear mechanism) — a spiral groove cut inside the vise body. The jaws are mounted radially around the chuck and connected to this scroll. When you turn the vise-key (or clamp handle), the scroll rotates, causing all jaws to move radially inward or outward in unison. The result: the workpiece is automatically aligned along the centre axis without manual fiddling of individual jaws.

This ensures high repeatability: once the workpiece is placed and clamped, it remains concentric — which is especially beneficial for timed machining tasks or batch production where speed and precision matter.