Professional 35mm Tungsten Carbide Tipped Hole Saw | 1-3/8 Inch Carbide Series for Thick Metal

1. Problem: High Torque Reaction and Material "Grabbing"

• The Problem: When boring medium-to-large 35mm holes, the cutting resistance increases significantly. Standard bits often "grab" or "bite" into the material unevenly, causing the drill to kick back (recoil) suddenly.

• The Result: Potential wrist injury for the operator, chipped carbide teeth, and jagged hole perimeters that fail to meet industrial inspection standards.

2. Cause: Uneven Load Distribution and Heat Saturation

• Point Loading: In standard hole saws, the cutting load is often concentrated on a few teeth. In 35mm bores, this leads to massive torque spikes if one tooth hits a hard spot in the alloy.

• Chip Entrapment: Larger diameters produce higher volumes of metal shavings. If these are not ejected, they cause "thermal friction," which can weaken the silver-brazed joints holding the carbide tips.

3. Solution: Triple-Edge Geometry and Reinforced Stability

• Triple-Edge Cutting System: Our 35mm series utilizes a specialized tooth arrangement divided into Outer, Middle, and Inner edges. This divides the 35mm cutting path into three manageable stages, reducing individual tooth load and eliminating the "grabbing" effect for a smooth, milling-like finish.

• Enhanced Chip Evacuation Ports: We have widened the side evacuation slots specifically for the 35mm model. These utilize centrifugal force to eject hot chips instantly, protecting the carbide tips from heat-related failure during continuous production runs.

• Anti-Slip Triangular Shank: The 10mm triangular (three-flat) shank provides a mechanical lock within the drill chuck. This ensures 100% torque transfer and prevents the tool from spinning in the chuck during high-load boring in 20mm steel plates.

4. Technical Specifications

5. Professional Industry Applications

• Heavy Machinery Fabrication: Ideal for mounting 35mm hydraulic sensors and heavy-duty grease fittings in thick-walled equipment frames.

• Large-Scale Electrical MEP: The standard size for installing M32/M35 cable glands in stainless steel distribution boards and industrial control hubs.

• Structural Engineering: Reliable boring through thick-walled I-beams, channel steel, and alloy plates where standard HSS bits fail instantly.

6. Operation and Safety Guidelines

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

• RPM Command Strategy:

  • Stainless Steel: Maintain 250 - 350 RPM.

  • Mild Steel / Cast Iron: Maintain 350 - 500 RPM.

• Operator Safety: For 35mm boring, it is mandatory to use a drill with a side auxiliary handle. Maintain steady, consistent pressure and let the carbide "mill" the material.

7. FAQ: Expert Technical Support

Q: Can this 35mm saw be used with a standard cordless drill?

A: Yes, but only if the drill has a low-speed high-torque gear (Setting 1) and a side handle. High speeds will burn the carbide tips, while the side handle is necessary to manage the torque.

Q: Why is TCT better than Bi-Metal for 35mm holes?

A: Bi-metal saws use "scraping" teeth that blunt quickly in hard metals. TCT saws use "milling" carbide tips that stay sharp 10x longer and provide a much higher degree of circular accuracy and edge cleanliness.

Q: Does the 35mm slug get stuck in the cup?

A: No. The kit includes a high-tension ejection spring that exerts constant pressure against the metal core. Once the cut is complete, the slug is automatically ejected from the carbide cup.