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| Brand Name: | XRTOOLS |
| Model Number: | 4 inch |
| MOQ: | 200pcs |
| Price: | $1.2-15/pcs |
| Delivery Time: | 25-30days |
| Payment Terms: | L/C, D/P, T/T, Western Union, MoneyGram |
The Problem: When grinding rough concrete, the extreme vibration transfers directly into the angle grinder. If using a standard unthreaded cup wheel, this heavy vibration can cause the standard locking nut to loosen, creating a severe safety hazard. Furthermore, cheap grinding wheels use thin steel backing plates that flex and warp when pressed hard against uneven masonry.
The Result: Dangerous working conditions, operator fatigue from fighting a wobbling grinder, and uneven "gouged" floors caused by a distorted grinding wheel.
Indirect Fastening: Relying on a separate flange and locking nut to secure a heavy grinding wheel introduces multiple points of potential failure under intense harmonic vibration.
Insufficient Plate Mass: Stamped steel cores thinner than 2mm cannot absorb the brutal impact of double-row diamond segments colliding with cured concrete and granite.
Integrated 5/8"-11 Threaded Hub: This 4-inch cup wheel completely eliminates the need for loose flange nuts. It features a precision-machined 5/8"-11 female thread built directly into the core. It screws directly onto the angle grinder's spindle, locking itself tighter as the motor spins. This guarantees 100% power transfer and absolute safety, while allowing for tool-free, 10-second wheel changes on the job site.
3mm "Strong Steel" Core: The foundation of this wheel is a massive 3mm thick hardened steel plate. This industrial-grade thickness provides absolute structural rigidity. It completely eliminates flexing and vibration, ensuring the wheel remains dead-flat for a perfectly level concrete grind.
5mm "Workable" Double Row Segments: Armed with two concentric rings of high-concentration diamond segments. With a full 5mm of workable thickness, this aggressive double-row profile is engineered for rapid, deep material removal, chewing through thick epoxy and high-spots faster than single-row designs.
| Technical Pillar | Imperial Specification | Metric Specification | Industrial Benefit |
| Diameter | 4" | 100mm | Compact size ideal for edge work and tight spaces. |
| Connection Type | 5/8"-11 Female Thread | 5/8"-11 Female Thread | Tool-free, spin-on mounting; eliminates loose nuts. |
| Segment Design | Double Row | Double Row | Highly aggressive for maximum material removal. |
| Workable Thickness | 0.2" | 5mm | Extended lifespan for heavy commercial grinding. |
| Core Thickness | 0.12" | 3mm | Extreme rigidity; prevents warping and vibration. |
| Application | Dry or Wet | Dry or Wet | Versatile operation for all surface prep environments. |
Edge & Corner Detailing: The compact 4-inch (100mm) diameter makes this the ultimate tool for grinding concrete edges, tight corners, and stairs where larger 5-inch or 7-inch wheels cannot reach.
Heavy Coating Removal: Aggressively stripping away thick mastics, cured thinset, heavy epoxy floor coatings, and industrial glues.
Concrete Surface Leveling: Rapidly grinding down high spots, uneven expansion joints, and trip hazards on commercial concrete slabs and sidewalks.
Installation Protocol: Simply thread the cup wheel onto the 5/8"-11 spindle of your angle grinder by hand. Do not use a wrench to overtighten it prior to use; the rotational torque of the grinder will securely lock the wheel in place during the first few seconds of operation.
Mandatory Dust Extraction: Grinding dry concrete produces hazardous respirable crystalline silica dust. This tool features integrated air-holes specifically designed to work in conjunction with a vacuum-assisted angle grinder dust shroud.
Angle of Attack: Hold the grinder at a slight 5 to 15-degree angle. Do not press the wheel perfectly flat against the ground, as this traps the dust and prevents the double-row segments from effectively biting into the material.
Q: Why choose a 4-inch (100mm) wheel over a 4.5-inch (115mm) wheel?
A: A 4.5-inch or larger wheel covers more surface area and is better for the center of a large room. However, a 4-inch wheel is lighter, more maneuverable, and absolutely essential for doing detailed edge work against walls, grinding stairs, and fitting into tight corners where larger shrouds get blocked.
Q: Will the 5/8"-11 thread fit my European angle grinder?
A: The 5/8"-11 thread is the absolute standard for professional angle grinders in North America. Many European or Asian grinders use an M14 threaded spindle instead. Please verify your angle grinder's spindle thread before mounting.
Q: How do I remove the threaded cup wheel when I'm done?
A: Because the wheel self-tightens during use, you will need to engage the spindle lock button on the back of your angle grinder. Once locked, use a standard wrench on the machined flats of the cup wheel's hub to break the tension and spin it off.
Q: Can I use this cup wheel to polish a concrete countertop?
A: No. This double-row wheel is designed for aggressive, heavy material removal and leveling. It will leave visible scratches on the concrete. For polishing, you must start with this tool to level the surface, then switch to a series of resin-bonded diamond polishing pads.
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