38mm TCT Boring Bit | 25mm Effective Depth and Anti-Resonance Triangular Shank

1. Problem: Mechanical Resonance and Chip Saturation

• The Problem: When boring 38mm holes, the cutting edge travels at a higher linear velocity, which can trigger high-frequency mechanical resonance (whistling/screeching). This vibration creates micro-cracks in the carbide tips. Additionally, the large volume of chips produced at 38mm often leads to "clogging," which stalls the boring process.

• The Result: Irregular, oval-shaped holes that prevent tight gasket seals, and premature tool failure due to excessive vibration-induced chipping.

2. Cause: Harmonic Frequency and Restricted Evacuation Space

• Harmonic Vibration: When a 38mm body rotates against non-homogeneous materials (like stainless steel pipes with weld seams), a lack of structural rigidity causes harmonic waves that shatter the cutting edge.

• Chip Build-up: If the metal shavings aren't ejected within milliseconds, they form a "chip weld" inside the hole, increasing friction and generating localized heat spikes.

3. Solution: Anti-Resonance Variable Pitch and U-Slot Technology

• Variable Pitch Anti-Resonance Technology: The carbide teeth on the 38mm circumference are arranged in an asymmetrical "Variable Pitch" pattern. This disrupts the harmonic frequency during the cut, suppressing vibration and ensuring stable operation even at higher torque levels.

• Ultra-Deep Dual U-Slots: We have engineered extra-deep U-shaped evacuation ports specifically for the 38mm model. These utilize centrifugal force to sling large-volume metal chips away from the cutting path, keeping the track clean even when boring through 20mm steel plates.

• 10mm Reinforced Triangular Shank: The integrated 10mm triangular (three-flat) shank provides a larger contact surface for the chuck compared to standard hex shanks. This manages the peak torque generated by the 38mm diameter, preventing rotational slip and accuracy deviation.

4. Technical Specifications

5. Professional Industry Applications

• Heavy Fluid Systems: Boring 38mm port entries in thick-walled alloy pipes or manifolds for 1.5-inch flange installations.

• Large-Scale Electrical Installations: Creating precision mounting for M38/M40 heavy-duty glands in stainless steel distribution boards to ensure IP67 seals.

• Shipbuilding and Chemical Maintenance: Handling 316 stainless steel bulkheads or alloy vessels where long-life boring solutions are required in corrosive environments.

6. Operation and Maintenance Guidelines

• Material Versatility: Optimized for Stainless Steel (10mm or less), Iron Plate (25mm or less), Cast Iron, and Aluminum.

• RPM Strategy:

  • Stainless Steel: 200 - 300 RPM

  • Carbon Steel / Iron Plate: 300 - 450 RPM

• Pressure Logic: Maintain a steady downward feed. Reduce pressure slightly when the 38mm teeth are about to break through the exit side to protect the carbide edges from "shock-chipping."

7. FAQ: Expert Technical Support

Q: Can the 38mm saw fit into a standard 10mm drill chuck?

A: Yes. Our triangular shank is 10mm in diameter, making it compatible with almost all standard 10mm and 13mm 3-jaw chucks. However, due to the high torque, we recommend using a drill with at least 750W of power.

Q: Why is there a screeching sound during 38mm boring?

A: Screeching is usually caused by excessive RPM or a lack of lubrication. For 38mm, reducing the speed below 300 RPM and adding cutting oil will immediately eliminate resonance and can triple the tool's lifespan.

Q: Is the ejection spring mandatory for 38mm holes?

A: Yes. At this diameter, the "slug" or core is heavy. The high-tension spring ensures that the core is automatically ejected upon breakthrough, preventing the waste material from becoming jammed inside the carbide cup.