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VMD & VMC Large Drill Introduction
Created on 2025.08.11
The right image shows the typical appearance of the VMD Large-Diameter Deep-Hole Drill.
This is the representative image of this series of tools.
Material: Mainly using the CHUAN RUN brand, drill rod material 42CRMO,
The blade and center drill are made of hard alloy (such as TiN-H coating), and their structure is sturdy and durable.
VMD large drill bit is a type of indexable, modular design large diameter deep hole machining tool, commonly used for processing holes with a diameter of Φ45–Φ180 mm and above (for larger diameter needs, please consult), and can complete high efficiency drilling tasks with a depth of 3–10 times the diameter in one processing.
Its core advantages lie in the replaceable blades, reusable tool bodies, and internal cooling, significantly reducing the unit processing cost per hole and improving processing efficiency.
And Chuan Run (CHUAN RUN) is to address the customer's concerns about the center drill's wear resistance.
Based on the original VMD drill bit
Replace the drill bit center drill with a shovel drill blade
More wear-resistant
Carbide shovel drill blade, wear resistance increased by 30~50%
It also enhances the stability of the blade holder, allowing the blade to process stably -- known as VMC deep hole large drill bit
Structural Characteristics
1. Modular Design
*The blade and the blade holder can be separated, allowing for flexible combinations to meet different depth requirements.
*Only the blade or cutter head needs to be replaced during wear, saving overall tool costs.
2. Indexable Inserts
*Blades are often made of hard alloy (with coatings such as TiAlN, TiCN, etc.).
*The cutting edge is sharp, has high wear resistance, and is suitable for various materials such as steel, cast iron, and stainless steel.
3. Centered Design
*The center blade and the outer blade work together to ensure hole position accuracy and straightness.
*Suitable for scenarios with high requirements for hole accuracy.
Application Advantages
- High efficiency: Taking the processing of Φ105 mm × 550 mm deep holes as an example, traditional twist drill + rough boring takes 150 minutes, while VMD large drill bit only takes 18 minutes, achieving it in one step.
- Low cost: The tool body can be reused, requiring only regular replacement of the blades and the central tool holder, significantly reducing the processing cost per hole.
- Strong adaptability: capable of handling various materials (steel, cast iron, stainless steel, aluminum alloy, etc.), and suitable for various CNC lathes, machining centers, and special machine tools.
- High safety: Long chips are not easy to tangle, reducing safety hazards caused by chip handling.
Applicable industries
- Mold manufacturing (large mold cooling water channel holes)
- Energy equipment (wind power, nuclear power component deep holes)
- Railways and Ships (Large Shaft Components, Sleeve-Type Parts)
- Heavy machinery (supporting components, bearing seats)
VMD large drill bits have become an efficient solution to replace traditional multi-step processes in large hole and deep hole machining. By selecting the right brand and optimizing tool parameters, it can not only improve production efficiency but also significantly reduce processing costs, bringing long-term competitive advantages to enterprises.
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