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| Brand Name: | XRTOOLS |
| Model Number: | 24MM |
| MOQ: | 100pcs |
| Price: | $1.45-30.68/pcs |
| Delivery Time: | 30-35days |
| Payment Terms: | T/T, L/C, D/P, Western Union |
When drilling heavy steel on-site, the biggest headaches are tool "walking" (slipping off center) and the metal slug getting stuck inside the cutter. For operators in the USA and Canada, using non-standardized tools often leads to bolt-hole misalignment, which can compromise the structural integrity of a project and waste hours of labor.
Standard drills lack a dedicated centering mechanism, causing them to wander under pressure. Furthermore, without a high-precision internal taper, the metal slug expands from heat and seizes against the cutter walls. If the pilot pin doesn't engage perfectly with the spring-loaded arbor, the slug won't eject, forcing the operator to stop and manually pry it out.
Our Fractional HSS Annular Cutter is engineered for the American industrial standard. As shown in the image, the cutter works in perfect synergy with a precision Pilot Pin. This pin centers the tool exactly on the mark and triggers a spring-loaded ejection the moment the hole is finished. The 7/8"diameter is precision-ground to ensure a perfect fit for standard heavy-duty bolts used in North American construction.
| Feature | Specification |
| Material | Premium HSS-M2 (High-Speed Steel) |
| Diameter (Ø) | 7/8" (0.875 inches) |
| Cutting Depth | 1" (25.4 mm) |
| Shank Style | 3/4" Weldon Shank (Standard Dual Flat) |
| Sizing Standard | Fractional Imperial (North American Standard) |
| Manufacturing | 100% Fully CNC Ground |
| Hardness | HRC 63-65 |
Steel Building Fabrication: The 7/8" size is the "workhorse" for drilling holes for standard 3/4"and 13/16" structural bolts.
Bridge & Highway Repair: Ideal for thick-plate drilling where portability and speed are required on-site.
Oil & Gas Refineries: Heavy-duty performance in alloy steels and structural components.
Truck & Trailer Repair: Perfect for chassis modification where precision hole diameters are mandatory.
Pilot Pin Synergy: Always use the high-strength pilot pin included/recommended; it centers the cutter and controls internal coolant flow.
Speed & Feed: For 7/8" HSS cutters, maintain a steady RPM and constant lubrication to prevent "blueing" the cutting edges.
Laser Marking: Check the laser-etched shank (as seen in the image) to verify size (7/8" * 1") before installation to prevent setup errors.
Q: Why is the 7/8" size so popular in the US market?
A: It is the standard clearance size for 3/4" bolts, providing the exact 1/8" of play required by many American building codes for structural steel connections.
Q: Can I use this cutter with a Nitto One-Touch machine?
A: This specific cutter has a Weldon Shank (two flats). To use it with a One-Touch system, you will need a Weldon-to-One-Touch adapter.
Q: Does the pilot pin come included with the cutter?
A: We offer them both individually and as sets. For the best performance, we recommend purchasing our high-strength pins to match the 1" depth of cut.
Q: How many holes can I expect from one M2 cutter?
A: With proper lubrication and steady pressure on mild steel, you can typically achieve 200–500 holes before needing a professional re-sharpening.
Q: What is the benefit of the fully ground flutes seen in the photo?
A: The smooth, ground surface reduces friction and allows chips to "slide" out effortlessly,
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