Blue Spot Tools 115mm 4.5" 40 Grit Flap Sanding Grinding Disc 19681 Bluespot

Blue Spot Tools 115mm 4 1/2 inch 40 Grit Aluminium Oxide Flap Sanding Grinding Disc – 19681 Bluespot

MPN: 19681

Barcode: 5028734196818

Size: 115mm 4-1/2"

Grit Grade: 40g Coarse

Grit Type: Aluminium Oxide

Product Overview:

The Blue Spot Tools 115mm Coarse 40 Grit Aluminium Oxide Flap Disc is engineered for efficient stock removal, smoothing, and surface prep on a wide range of metals. Designed for use with standard 4½ inch angle grinders, this heavy-duty Type 29 conical disc provides a more aggressive cutting angle, making it ideal for grinding flat surfaces, contours, and edges.

Constructed with premium aluminium oxide abrasive material, this flap disc maintains consistent performance while delivering excellent durability and long-lasting life. Best used between 15 to 25 degree angles for optimum results. Suitable for alloy and low-alloy steels.

Key Features:

• High-performance 40 grit aluminium oxide abrasive

• Type 29 conical profile for edge and contour grinding

• Ideal for grinding, blending, and surface preparation

• Suitable for alloy steel and low-alloy steel

• Depressed centre for stability and controlled cutting

• Delivers consistent stock removal across large surfaces

Specification Main Points and Applications:

• Disc Diameter: 115mm (4½ inch)

• Bore Size: 22.2mm

• Grit Rating: 40 (coarse)

• Disc Type: Type 29 (conical)

• Material: Aluminium Oxide

• Max Safe Speed: 13,280 RPM (80 m/s)

• Compatible Tools: All standard 115mm angle grinders

  Applications:

  • Smoothing welds

  • Edge and bevel grinding

  • Surface conditioning on steel and alloy components

  • Removing rust, paint, and scale

  • Preparing metal before priming or painting

How The Grit Grades Work:

• 40 grit being coarse 120 grit being the finest.

Frequently Asked Questions:

• What materials can I use this flap disc on?
  It’s ideal for alloy steels, mild steel, and low-alloy metals.

• What does Type 29 mean?
  Type 29 refers to a conical-shaped disc, which is great for working at an angle and getting into edges or contours.

• Is this disc reusable?
  Yes, it has a long service life—just stop when the abrasive flaps wear down.

• Can it be used for polishing?
  Not polishing — this is a 40 grit coarse disc best for grinding and shaping, not finishing.

• What angle should I use it at?
  For best results, use between a 15° to 25° angle when grinding.

• Will this fit my grinder?
  As long as your angle grinder takes 115mm discs with a 22.2mm bore, it will fit perfectly.