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| Brand Name: | XRTOOLS |
| Model Number: | 20pc hole saw set |
| MOQ: | 500set |
| Price: | $0.8-20/pc |
| Delivery Time: | 25-35days |
| Payment Terms: | L/C, T/T, D/P, Western Union, MoneyGram |
The Problem: In industrial maintenance or large-scale construction, the center pilot drill is the most frequent point of failure due to the high thermal stress of centering in stainless steel. When a pilot bit snaps or dulls mid-shift, a high-value technician's work stops entirely.
The Result: Significant labor loss, missed deadlines, and the hazard of using improvised centering methods that can damage expensive tungsten carbide teeth.
Lack of Redundancy: Most sets provide only one spare pilot, which is insufficient for multi-day field operations.
Missing Sizes: Skipping specific diameters like 14mm or 57mm forces operators to use "near-fit" tools, compromising the precision required for high-pressure seals or structural fasteners.
14-Diameter Professional Range: This collection spans from 13mm (1/2") to 57mm (2-1/4"), providing the most complete sizing coverage in the industry. It ensures absolute compatibility with major international industrial standards, including PG glands, M-series conduits, and heavy-duty sensors.
4X Pilot Redundancy: The kit includes 4 high-grade spare center drills with integrated ejection springs. This 4-piece backup ensures that even on the most demanding stainless steel projects, the crew remains operational without returning to the tool crib.
YG8 Triple-Edge Milling Technology: The carbide tips are engineered with a precision-ground triple-edge geometry. This divides the cutting path into three distinct stages, reducing the torque required by 35% and preventing the "bit-snapping" kickback common in large-diameter metal boring.
Enterprise Organization: Housed in a reinforced Aluminum Storage Box, the set is designed for mobile fleet use. The custom-fit foam interior protects the precision-ground carbide teeth from impact and provides instant inventory verification.
| Specification Type | Details (Ascending Order) |
| Boring Diameters (Metric) | 13, 14, 16, 19, 22, 25.5, 29, 32, 35, 38, 45, 51, 54, 57mm |
| Boring Diameters (Imperial) | 1/2", 9/16", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8", 1-1/2", 1-3/4", 2", 2-1/8", 2-1/4" |
| Effective Cutting Depth | 25mm (1 inch) |
| Tip Material | YG8 Tungsten Carbide (HRA 90+) |
| Shank Type | 10mm (3/8") Anti-Slip Triangular Shank |
| Accessories Included | 4x Pilot Drills & Springs, 2x Hex L-Wrenches |
| Storage Solution | Reinforced Enterprise Aluminum Case |
Heavy Structural MRO: Precision boring in thick-walled I-beams and U-channels where high-tensile structural steel requires carbide penetration.
Marine & Petrochemical Engineering: Specifically designed for repetitive boring in 316 Stainless Steel piping and high-pressure alloy manifolds.
Industrial Electrical MEP: The complete solution for installing the full range of M12 through M50 connectors and high-capacity electrical conduit transitions.
Material Versatility: Optimized for Stainless Steel (≤ 10mm), Cast Iron, Iron Plate (≤ 25mm), Aluminum Alloys, and Fiber-Reinforced Plastics (FRP).
RPM Optimization Protocol:
13mm – 25.5mm: 400 - 600 RPM
29mm – 38mm: 250 - 400 RPM
45mm – 57mm: 100 - 180 RPM (Maintain low speed and high pressure for carbide longevity).
Cooling Logic: Although the YG8 tips can withstand temperatures exceeding 1000°C, the use of a specialized cutting lubricant is essential to facilitate chip flow and prevent the ejection spring from binding.
Q: Why is the 57mm size included in this 20pc set?
A: 57mm (2-1/4") is a critical clearance size for large-bore heavy industrial piping and specialized manifold fittings where standard 50mm or 54mm sizes are insufficient.
Q: Are the 4 spare pilots the same grade as the originals?
A: Yes. All 4 spare bits are industrial-grade 135° split-point center drills, specifically ground to center the tool instantly without "walking" on polished stainless steel.
Q: Will the triangular shank fit my existing drill?
A: Absolutely. The 10mm triangular (three-flat) shank is designed for maximum compatibility with all standard 10mm and 13mm 3-jaw chucks, providing a zero-slip interface.
Vacuum-Fired Brazing: Every carbide tip undergoes a multi-stage vacuum brazing process to ensure a permanent bond that survives high-impact industrial environments.
Concentricity Standards: Manufactured to strict engineering tolerances to ensure a Total Indicator Runout (TIR) ≤ 0.10mm, providing the highest precision in the category.
Industrial Compliance: This kit is manufactured for professionals who require consistent, safe, and repeatable results in 24/7 industrial fabrication settings.
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