Achieve Flawless Bolt Root Cuts with FUJI T27 Precision Technology
In industrial construction, shipyard maintenance, and heavy metal fabrication, removing protruding bolts or concrete anchors flush to the ground is a notorious challenge. When using a standard flat cutting wheel, the angle grinder's locking nut protruding from the center physically prevents the blade from lying flat. Operators are forced to cut at an awkward angle, inevitably leaving a metal stub that requires secondary, time-consuming grinding.
Introducing the ultimate solution: The FUJI Depressed Center Bolt Root Cutting Disc (Shirasagi Series). By rethinking the geometry of abrasive tools, we have created a specialized disc that ensures a perfect, 100% flush cut at the absolute root of the bolt.
Most cutting wheels on the market are Type 41 (T41), which are completely flat. The FUJI Bolt Root Disc utilizes a Type 27 (T27) Depressed Center design—a shape traditionally reserved exclusively for grinding wheels.
By recessing the center hub, the angle grinder's fixed flange and locking nut sit entirely within the depression. This brilliant structural modification allows the cutting edge of the disc to lay completely flush against the workpiece surface. The result? Clean, orthogonal cutting with zero interference, eliminating angled stubs and completely bypassing the need for secondary grinding steps.
Understanding that different projects have varying demands, FUJI offers this specialized 105mm (4-inch) disc in two distinct thickness profiles to maximize your operational efficiency:
Cutting flush to a surface often introduces lateral (side-to-side) stress on a thin abrasive wheel. Safety is non-negotiable. Whether you select the 1.0mm or the 2.4mm variant, every FUJI Bolt Root Disc is reinforced with a double-layer fiberglass mesh structure. This premium reinforcement guarantees structural integrity, entirely eliminating the risk of the disc shattering during intense operations.
To extract the absolute best performance from your abrasives, the power tool driving it matters immensely. With over 70 years of industrial manufacturing excellence, FUJI holds a unique global position: we are the only Japanese enterprise that manufactures both power tools and grinding wheels.
Because we design the industrial angle grinders alongside the consumables, we intimately understand the perfect RPM, torque ratios, and physical mating requirements. Pairing the Shirasagi Bolt Root disc with a FUJI grinder guarantees a seamless, vibration-free fit that maximizes cutting power while minimizing operator fatigue.
| Feature | Standard Flat Disc (T41) | FUJI Bolt Root Disc (T27) |
|---|---|---|
| Hardware Clearance | Locking nut hits the floor | Nut is recessed; zero interference |
| Cutting Angle | Must angle upward | 0° Flat (Perfectly flush) |
| Secondary Work | Grinding the remaining stub | None (One-step cut) |
| Safety Structure | Often single-net (Fragile on side loads) | Double-net fiberglass (Shatter-proof) |
The T27 depressed center design hides the grinder's locking flange inside the wheel's contour. This allows the disc to lay completely flat against the workpiece, enabling the flush cutting of bolts and rivets without the nut getting in the way.
If your priority is cutting speed and minimal heat, the 105x1.0mm is ideal. If you are cutting thicker, stubborn bolts and need the disc to last longer across multiple cuts, opt for the heavy-duty 105x2.4mm version.
No. Both thicknesses are built with a rigorous double-layer fiberglass mesh structure. This design provides exceptional safety and prevents fragmentation under heavy stress.
Stop wasting time grinding down leftover stubs. Upgrade to true flush-cutting precision today! Contact FUJI Grinding Wheel to request samples or find a distributor in your region.
