Product Overview

When machining tight-tolerance parts on a CNC mill or surface grinder, standard machine vises often fall short due to "jaw lift"—the tendency of the movable jaw to lift the workpiece slightly as clamping pressure is applied. The GT Precision Modular Vise is specifically designed to solve this problem. Utilizing a unique angled slide mechanism, the clamping force is directed both horizontally (against the part) and vertically (downward toward the vise bed). This guarantees that the workpiece remains perfectly seated against the parallels. Furthermore, the "modular" design means these vises are precision-ground to exact matching dimensions, allowing you to seamlessly gang multiple vises together to hold exceptionally long parts or to maximize the number of parts on your machine table.

Key Features & Advantages

• Anti-Lift (Pull-Down) Mechanism: The movable jaw features a specialized internal wedge design. As you tighten the screw, the jaw is actively pulled downward, securely seating the workpiece against the vise bed or parallels and eliminating Z-axis errors caused by part lift.

• Extreme Precision & Squareness: Manufactured from premium 20CrMnTi alloy steel, case-hardened to HRC 58-62, and precision-ground on all critical surfaces. We guarantee parallelism of 0.005mm/100mm and squareness of 0.005mm/100mm, ensuring your parts are machined perfectly true.

• True Modular Design: The fixed jaw, movable jaw, and vise body are all precisely matched. Multiple GT vises of the same size can be mounted side-by-side or end-to-end on a machine table, tombstone, or grid plate, acting as a single, massive clamping system for long extrusions or multi-part setups.

• High Clamping Force: The robust lead screw and thrust bearing design provide immense, consistent clamping pressure, securely holding tough materials during aggressive heavy-duty milling without distortion.

• Versatile Mounting Options: The vise body features precision-ground side slots and bottom keyways, allowing for rapid, accurate alignment and secure mounting using standard T-slot nuts and toe clamps.

Why Partner with Pingyuan Zhenghao Machinery?

• Direct Manufacturer Savings: Bypass trading companies and source premium CNC workholding solutions directly from our factory for highly competitive wholesale pricing.

• Comprehensive Size Range: We manufacture the full spectrum of GT modular vises to suit any machine size:

• GT100 (100mm / 4" Jaw Width)

• GT125 (125mm / 5" Jaw Width)

• GT150 (150mm / 6" Jaw Width)

• GT175 (175mm / 7" Jaw Width)

• GT200 (200mm / 8" Jaw Width)

• GT300 (300mm / 12" Jaw Width)

• Matched Sets Available: We can supply matched pairs or sets of vises that are ground together at the factory to guarantee identical bed heights, perfect for ganged setups.

• Strict Quality Control: Every vise undergoes rigorous inspection using 3D CMMs, granite surface plates, and dial indicators to verify all geometric tolerances before packaging.

Frequently Asked Questions (FAQ) - Selection Guide

Q1: What does "Modular" mean in a GT vise?

A: "Modular" means the vise is designed as a building block. Because the sides and ends are precision-ground perfectly square and parallel to the bed, you can place two or more GT vises right next to each other on a machine table. If you buy a "matched set," the bed heights will be identical, allowing you to clamp one long piece of material across multiple vises simultaneously without inducing stress or bending in the part.

Q2: How does the "Pull-Down" jaw work?

A: Inside the movable jaw assembly, there is a hardened steel wedge or hemispherical segment. When the lead screw pushes the jaw forward to clamp the part, this wedge forces the jaw face slightly downward at an angle. This downward vector counteracts the natural tendency of the jaw to lift under pressure, keeping your workpiece firmly seated on the parallels.

Q3: Can I use a GT vise on a surface grinder?

A:Yes, absolutely. Because GT vises are hardened and ground to such high tolerances (typically within 5 microns for parallelism and squareness), they are frequently used as toolmaker's vises on precision surface grinders, as well as on CNC milling machines.

Q4: How do I mount the GT vise to my machine table?

A: GT vises do not have the traditional mounting "ears" or flanges found on standard Kurt-style vises. Instead, they have precision slots machined into the sides of the body. You use standard toe clamps (strap clamps) that fit into these slots to secure the vise to your machine's T-slots. This design saves space and allows vises to be mounted directly adjacent to one another.

Eliminate workpiece lift and maximize your CNC machine's capacity with our High-Accuracy GT Precision Modular Vises.

Contact our sales team today for a complete catalog and bulk pricing.