Klingspor 322778 SMT 624 Flap Disc, 150 mm, P40, Convex, 10 Pack

For aggressive stock removal and edge grinding on steel and stainless steel, the Klingspor SMT 624 flap disc stands apart through its convex shape and zirconia alumina abrasive. Unlike flat discs, the curved profile concentrates pressure on a smaller contact zone, letting you grind faster with less effort. The P40 grit is coarse enough to remove material quickly, yet the resin-bonded flaps wear evenly for consistent performance throughout the disc's life.

Highlights

• Convex (gewölbt) design for high-pressure grinding and better access to corners
• Zirconia alumina abrasive with self-sharpening effect for long life
• Fiberglass backing plate for stability and safety at high speeds
• 10 discs per pack — ready for demanding workshop use
• Complies with EN 13743 safety standard

In daily use

Mount the SMT 624 on a standard angle grinder with a 22.23 mm bore. The disc is rated for a maximum rotational speed of 10200 RPM, so it works with most common grinders. Use it for weld seam removal, deburring, surface preparation, and coarse finishing on steel and stainless steel. The convex shape allows you to reach into fillets and tight areas that flat discs cannot. As the flaps wear, fresh abrasive is continuously exposed, maintaining a high cut rate throughout the disc's service life.

Full specifications

• Brand: Klingspor
• Model: 322778
• MPN: 322778
• EAN: 4014855209477
• Product type: Flap disc
• Series: SMT 624
• Disc diameter: 150 mm
• Bore diameter: 22.23 mm
• Grit size: P40
• Disc shape: Convex (gewölbt)
• Abrasive material: Zirconia alumina
• Backing plate material: Fiberglass
• Max. rotational speed: 10200 RPM
• Application area: Metalworking, stainless steel, steel
• Bonding agent: Synthetic resin
• Quantity per pack: 10 pieces
• Tool compatibility: Angle grinders
• Safety standard: EN 13743
• Aggressiveness: High
• Durability: High
• Recommended use: Coarse grinding, stock removal, edge grinding

Final note

When you need to remove material fast without sacrificing control, the Klingspor SMT 624 convex flap disc delivers the aggressive performance professionals expect from a zirconia alumina abrasive.