New design flap disc with plastic backing
1. Type 29 Conical Design
2. For Angle Grinder Use
3. Arbor Size: 5/8”-11
4. Grit: 40 / 60 / 80
5. Application: Metal & Stainless Steel
6. Good Quality Long Life Abrasive
7. zirconia Alumina Abrasive Cloth (Heavy-duty polyester/cotton backing cloth)
8. RPM rating Max - 12000
1. Trimmable Backing (The "Extendable" Life Function)
The biggest modern innovation for plastic-backed flap discs is that the backing is engineered to be trimmable (shaved down) as the abrasive flaps wear out.
How it works: On standard fiberglass discs, once the outer abrasive edge wears down to the rigid backing, the disc must be thrown away—even if there is still plenty of usable abrasive grain left closer to the center. With a trimmable plastic backing, the operator can push the edge of the spinning disc against a sharp metal piece to safely shave down the plastic overhang.
The Benefit: This exposes a completely new layer of fresh abrasive cloth, doubling or tripling the useful lifespan of a single flap disc and drastically reducing waste.
2. Non-Marring Surface Protection
Fiberglass backing is highly abrasive. If an operator accidentally tilts a traditional flap disc too far during precision work, the exposed fiberglass edge will deeply gouge, scratch, or mar the metal workpiece.
The Benefit: Plastic backing is inherently softer. If it accidentally makes contact with the metal surface, it will flex or slide without causing severe gouges. This is a crucial function for fabricators working on expensive materials like stainless steel, aluminum, or automotive body panels where surface finish is critical.
3. Vibration Dampening and Flex Control
Modern plastic formulations allow manufacturers to dial in specific flex profiles for different applications.
How it works: High-grade plastics absorb operational harmonics much better than rigid, brittle fiberglass.
The Benefit: This built-in shock absorption significantly reduces hand-arm vibration (HAV) for the tool operator, cutting down on physical fatigue during long shifts and leading to a smoother, more consistent finish on contoured surfaces.
4. Built-in Threaded Hubs (Eco-friendly Integration)
Instead of requiring a separate metal 5/8"-11 or M14 nut adapter, new plastic backings are molded with the threaded hub integrated directly into the plastic matrix.
The Benefit: It streamlines manufacturing, lowers the overall weight of the tool (reducing angular momentum stresses on the angle grinder motor), and makes changing out discs a tool-free, 3-second process without risking cross-threading.
💡 Summary Comparison
Feature | New Plastic Backing | Traditional Fiberglass Backing |
Material Usage | 100% Usable (Trimmable down to the core) | ~50% Usable (Discarded once edge wears out) |
Workpiece Safety | Non-marring / Forgiving edge | Abrasive / High risk of gouging |
Vibration | Low (Absorbs shock) | High (Rigid transfer) |
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