Description
Klingspor 317819 4-1/2" x .045" x 7/8" Kronenflex Edge Depressed Center Cutting Wheel
Execute precise, flush, and burr-free cuts with the Klingspor 317819 Kronenflex® Edge 4-1/2" x .045" x 7/8" Depressed Center Cut-Off Wheel (A 646 R). Engineered specifically for professional metal fabricators, pipefitters, and welders, this high-performance abrasive disc combines rapid slicing action with the recessed hub geometry needed for tight clearances and flush-to-surface cutting.
Featuring an ultra-thin .045" (1.0 mm) profile with a Type 27 (depressed center / depressed hub) design, this disc protects your workpiece by recessing the grinder spindle nut below the cutting plane. It minimizes friction and material loss, enabling fast, cool cuts that eliminate blue heat tinting and post-cut distortion on thin-walled tubing, sheet metal, and solid bar stock. Formulated free of iron, sulfur, and chlorine contaminants (Fe-S-Cl < 0.1%), it prevents ferritic contamination and post-weld corrosion on all stainless steel (INOX) fabrications.
Key Features:
- Type 27 Depressed Center Design: Recesses the grinder lock nut below the cutting rim, allowing clean, flush-to-surface cuts without spindle interference.
- Ultra-Thin .045" Cutting Kerf: Reduces contact friction and motor load while increasing cut speed and cuts-per-disc yield.
- Stainless Steel & Steel Versatility: Specially formulated bond excels across sheet metal, angle iron, structural steel, and stainless steel (INOX).
- Contaminant-Free Formulation (Fe-S-Cl < 0.1%): Prevents chemical cross-contamination, pitting, and oxidation on sensitive stainless alloys.
- Minimal Thermal Discoloration: Cool-cutting grain technology limits heat buildup, preventing material warping and reducing secondary deburring operations.
- High-Strength Fiberglass Reinforcement: Multi-layer woven fiberglass reinforcement ensures high lateral stability and maximum operator safety at top speeds.
- Universal 7/8" Bore: Standard unthreaded arbor compatible with all leading 4-1/2" angle grinders.
Specifications
| Specification | Details |
| Brand | Klingspor Abrasives |
| Series | Kronenflex® Edge (Special Class / A 646 R) |
| Part / Item # | 317819 |
| Wheel Diameter | 4-1/2 in. (115 mm) |
| Thickness | .045 in. (1.0 mm) |
| Arbor / Bore Size | 7/8 in. (22.23 mm) |
| Wheel Shape | Type 27 / Form 42 (Depressed Center) |
| Abrasive Grain | Premium Aluminum Oxide (A) |
| Bond / Hardness | Resin Bonded with High Reinforcement (Hard) |
| Max Operating Speed | 13,300 RPM (80 m/s) |
| Material Compatibility | Stainless Steel (INOX), Carbon Steel, Structural Steel, Sheet Metal |
| Purity Grade | Iron, Sulfur, and Chlorine-Free (Fe-S-Cl < 0.1%) |
| Origin | Engineered & Manufactured in Germany / Europe |
Frequently Asked Questions
What is the difference between this wheel (317819) and the flat version (317818)?
The 317819 is a Type 27 depressed center cutting wheel with a recessed center hub, while the 317818 is a Type 1 flat wheel. The depressed center allows the grinder spindle nut to sit below the abrasive face, enabling flush cuts against surfaces and improved clearance at slight angles.
Can this wheel be used safely on stainless steel (INOX)?
Yes. The Kronenflex Edge A 646 R formulation is certified free of iron, sulfur, and chlorine contaminants (Fe-S-Cl < 0.1%), ensuring zero cross-contamination and preventing future rust spots or corrosion on stainless steel welds and workpieces.
Can I use a Type 27 cutting wheel for grinding or weld blending?
No. Even though it features a depressed center, this disc is only .045" thick and is strictly engineered for 90-degree peripheral cutting. Applying heavy side-load pressure for face grinding can damage the fiberglass mesh and cause wheel failure. Always use a dedicated 1/4" Type 27 grinding disc for grinding tasks.
What is the maximum rated speed for this wheel?
This 4-1/2" cutting disc is certified for maximum operating speeds up to 13,300 RPM (80 m/s), complying with international EN 12413 and oSa safety standards.
Does this wheel require a specialized mounting flange?
No. It mounts onto any standard 4-1/2" angle grinder using the standard 7/8" inner flange and outer lock nut intended for Type 27 depressed center wheels.
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Product Specifications
category_bullets: |
Depressed center design allows flush cutting and clearance when working near surfaces Professional 4-1/2" Kronenflex wheel engineered for rapid cutting in metal and stainless steel |
selling_points: |
✔ Flush Cutting Clearance: Depressed center hub allows flat, unobstructed cuts ✔ Ultra-Thin Profile: 0.045" thickness ensures fast cuts with minimal burrs |
