Product Overview

When working with miniature components, standard machine vises are often too bulky and lack the necessary "feel" for delicate clamping. The Small QGG Precision Vise series is specifically designed for toolmakers, watchmakers, and precision machinists. These screw-type mini vises provide a smooth, controlled clamping force, preventing distortion or crushing of fragile parts. Their fully ground, perfectly square bodies allow them to be used on their base, sides, or ends, making them incredibly versatile for multi-axis grinding, complex wire EDM setups, or high-magnification optical inspection.

Key Features & Advantages

• Ultra-Compact Design: Available in jaw widths of 25mm (QGG25), 33mm (QGG33), and 38mm (QGG38), these vises easily fit into tight machine envelopes, under microscope lenses, or onto small rotary tables.

• Extreme Precision: Precision-ground on all external surfaces to achieve a squareness and parallelism of 0.005mm/100mm (0.0002"). This allows the vise to be flipped onto its sides without losing the part's reference datum.

• High-Hardness Alloy Steel: Constructed from premium tool steel (such as 20CrMnTi) and deep case-hardened to HRC 58-62. This ensures the vise maintains its geometric accuracy and resists wear even in highly abrasive grinding environments.

• Smooth Screw Mechanism: The fine-pitch lead screw provides excellent mechanical advantage and precise tactile control over clamping pressure, which is crucial for holding thin-walled or delicate workpieces securely.

• V-Groove Jaws (Optional): The movable or fixed jaws can feature precision V-grooves (horizontal and vertical) to securely hold small cylindrical pins, micro-shafts, or round stock perfectly parallel to the base.

Why Partner with Pingyuan Zhenghao Machinery?

• Direct Manufacturer Savings: Buy premium toolmaker vises directly from the source, ensuring the best wholesale prices without middleman markups.

• Extensive QGG Range: We manufacture the complete line of QGG vises, from these micro sizes up to large 150mm models, ensuring we have the exact size for your application.

• Strict Quality Control: Every mini vise undergoes rigorous 3D CMM and optical comparator inspection to guarantee its dimensional accuracy and clamping parallelism before it leaves our facility.

Frequently Asked Questions (FAQ) - Selection Guide

Q1: What does QGG stand for?

A: QGG is an industry-standard designation for a manual, screw-type precision toolmaker vise (often referred to as a grinding vise). It distinguishes it from QKG (which is a pin-type/screwless toolmaker vise) or hydraulic CNC vises.

Q2: Can I use these mini vises on a magnetic chuck?

A:Yes, absolutely. Because they are made of ferromagnetic alloy steel and have perfectly flat, precision-ground bases, they mount exceptionally well and securely on magnetic chucks used in surface grinders or EDM machines.

Q3: Are they rust-proof for use in submerged wire EDM?

A: While they are made of high-quality steel, they are not inherently rust-proof (like 400-series stainless steel). For submerged wire EDM use, we highly recommend applying a light coat of rust preventative when not in use, drying them thoroughly after cycles, or inquiring about our specialized stainless steel EDM vise options.

Q4: How do I hold round parts in these flat jaws?

A: Many of our QGG vises come with V-grooves machined into the face of the jaws specifically for holding round stock. If you require V-grooves, please specify this when requesting a quote, as some models feature completely flat jaws designed for maximum surface contact on square or rectangular parts.

Secure your smallest, most critical parts with absolute confidence using our Small QGG Precision Mini Vises.

Contact our sales engineering team today for a complete catalog, dimensional drawings, and bulk pricing.