Description
Klingspor 4-1/2 in. x 1/4 in. A24R Supra Grinding Wheel - 13401
Tackle heavy-duty weld dressing, edge chamfering, and stock removal with the Klingspor 13401 Kronenflex® A 24 R Supra 4-1/2" x 1/4" x 7/8" Depressed Center Grinding Wheel. Engineered in Europe for metal fabricators, weld shops, and structural steel erectors, this industrial disc delivers rapid bite and sustained wear resistance under high mechanical pressure.
Formulated with premium synthetic aluminum oxide grains in a durable resin bond, the A 24 R Supra offers an ideal balance of hardness and cutting aggression. The 1/4" (6.0 mm) thick Type 27 depressed center profile allows smooth, low-vibration grinding at standard 15° to 30° attack angles. Multi-layer woven fiberglass reinforcement ensures maximum shatter resistance up to 13,300 RPM, keeping operators safe across structural carbon steels, high-alloy steels, tool steel, and heavy cast iron.
Key Features:
- Aggressive A 24 R Grain Formulation: Coarse aluminum oxide blend delivers fast stock removal without glazing or premature edge crumbling.
- Type 27 Depressed Center Hub: Recessed arbor geometry allows comfortable 15° to 30° grinding angles for weld blending, root pass cleaning, and edge beveling.
- Long Service Life: Hard resin matrix releases fresh abrasive grain evenly to maintain peak grinding performance across the entire wheel life.
- Triple-Layer Fiberglass Reinforcement: High-tensile woven backing provides superior burst strength and lateral stability under heavy side load.
- Multi-Metal Capability: Excels on structural carbon steel, mild steel, weld seams, tool steels, and iron castings.
- Strict Safety Compliance: Tested and certified to European safety standard EN 12413 and stamped with the prestigious oSa safety seal.
Specifications
| Specification | Details |
| Brand | Klingspor Abrasives |
| Series | Kronenflex® Supra (High Performance Class) |
| Part / Item # | 13401 |
| Wheel Diameter | 4-1/2 in. (115 mm) |
| Wheel Thickness | 1/4 in. (6.0 mm) |
| Arbor / Bore Size | 7/8 in. (22.23 mm) |
| Wheel Shape | Type 27 / Form 27 (Depressed Center) |
| Abrasive Grain | Aluminum Oxide (A) |
| Grit Size | 24 Grit (Coarse) |
| Bond / Hardness | Synthetic Resin Bond, Fiber-Reinforced / Medium-Hard (R) |
| Max Operating Speed | 13,300 RPM (80 m/s) |
| Material Suitability | Carbon Steel, Mild Steel, Hardened Steel, Tool Steel, Castings, Stainless Steel |
| Safety Standards | EN 12413, oSa Certified |
Frequently Asked Questions
What is the difference between a grinding wheel and a cutting disc?
A grinding wheel (like this 1/4" thick 13401) is engineered for heavy side-load pressure at an angle (15° to 30°) for blending weld beads, chamfering edges, and removing metal stock. Cut-off wheels (.045" to 1/16" thick) are strictly designed for 90° straight peripheral cutting and must never be used for face grinding.
What angle grinder sizes are compatible with this wheel?
The Klingspor 13401 is engineered for 4-1/2" (115 mm) angle grinders equipped with a standard 7/8" arbor flange and rated for speeds up to or above 13,300 RPM.
What materials can I grind with the A 24 R Supra disc?
The A 24 R formulation is optimized for carbon and structural steels, alloy steels, tool steel, weld beads, and cast iron. It can also be used for general dressing on stainless steel.
What does the "A 24 R" designation mean?
"A" signifies Aluminum Oxide abrasive grain, "24" represents a coarse grit size for rapid material removal, and "R" indicates a medium-hard resin bond designed to deliver long wheel life without excessive glazing.
How do I safely mount this Type 27 wheel?
Mount the wheel onto your grinder spindle with the depressed center hub nesting over the inner raised flange. Tighten using the matching outer clamping lock nut with the raised recess facing down into the wheel depression.
Product Specifications
category_bullets: |
Professional A24R Supra depressed center grinding wheel optimized for high-performance stock removal on steel Aggressive abrasive grain formulation delivers rapid cutting action and an extended service life |
selling_points: |
✔ High Stock Removal: A24R abrasive grain delivers aggressive cutting performance on steel✔ Extended Service Life: Engineered bond ratio maximizes durability across demanding jobs |
