Precision Self-Centering Vice

Product Description

A precision self-centering vice is a workholding device for machine tools, like mills and grinders, that automatically positions a workpiece at the center of the jaws. This differs from a standard vice, where one jaw is fixed and the other moves, requiring the operator to manually align the workpiece. The self-centering mechanism is ideal for high-precision, repetitive tasks where the centerline of the workpiece must align perfectly with the machine's spindle.

How It Works

A self-centering vice typically features a unique screw mechanism. When the handle is turned, a single lead screw with opposing left-hand and right-hand threads simultaneously moves both jaws in equal and opposite directions. This ensures the workpiece is gripped precisely in the center of the vice's body, eliminating the need for manual alignment. Some models have a master jaw and an opposing movable jaw, which are synchronized to maintain the center position.

Key Features and Benefits

• Automatic Centering: The primary benefit is the automatic centering of the workpiece, which saves significant setup time and eliminates the need for manual adjustment and referencing for each part.

• High Repeatability: Precision self-centering vices offer exceptional repeatability, often within 0.0002" to 0.0006". This is crucial for production runs where every part must be identical.

• High Clamping Force: Made from materials like ductile iron or hardened steel, these vices provide a strong, secure grip that prevents workpiece lift or movement during heavy cutting operations. The jaws can often be reversed to accommodate a wider range of sizes.

• Versatility: They are available in various configurations, including models with different jaw types (smooth, serrated, or soft jaws that can be machined for custom shapes). They are especially beneficial for 4th and 5th-axis CNC machining and for holding round, square, or irregular-shaped workpieces.