Blue Spot Tools 40 Grit Grinder Flap Sanding Grinding Disc 115mm 19690

Blue Spot Tools 40 Grit Flap Aluminium Oxide Sanding Grinding Disc 115mm 4 1/2 inch - 19690 Bluespot

Compatibility: All standard 115mm angle grinders

MPN: 19690

Barcode: 5028734196900

Grit Grade: 40g Coarse

Material: Aluminium Oxide

Diameter: 115mm 4-1/2"

Product Overview:

The Blue Spot Tools 40 Grit Aluminium Oxide Flap Disc is engineered for high-performance sanding, grinding, and finishing tasks on metal, wood, paint, and other tough surfaces. Featuring a coarse 40 grit abrasive, this disc is ideal for rapid material removal, rust elimination, weld blending, and surface shaping.

With its Type 29 conical profile, this flap disc allows excellent contact on edges and curved surfaces, while the depressed centre ensures optimal control and balance during use. Designed for use at a grinding angle of 15 to 25 degree, this disc is a go-to solution for both workshop professionals and DIY users tackling demanding metalwork jobs.

Built with durable aluminium oxide abrasive, it offers long-lasting performance and is best suited for alloy steel, mild steel, and low alloy materials. Compatible with all major brands of 115mm angle grinders.

• Coarse 40 Grit for aggressive grinding and fast material removal

• Type 29 Conical Flap Disc: Ideal for edge and contour work

• Depressed Centre for improved stability and safety

• Durable Aluminium Oxide Abrasive for extended lifespan

• Suitable for metal, wood, paint, rust, welds, and surface prep

• Fits all 115mm (4½") angle grinders with a 22.2mm bore

• Designed for use at 15 to 25 degree grinding angles

Specification and Main Points:

• Disc Diameter: 115mm / 4½"

• Grit: 40 – Coarse

• Abrasive Type: Aluminium Oxide

• Disc Type: Type 29 Conical Flap Disc

• Centre: Depressed – 22.2mm bore

• Max Safe Speed: 13,280 RPM / 80m/s

• Applications: Grinding, sanding, surface preparation

• Suitable Materials: Metal, wood, paint, alloy steel, low alloy steel

Also Available In:

• 60 Grit – Medium Grinding

• 80 Grit – Fine Grinding

• 120 Grit – Extra Fine Finishing

Understanding the Grit Grades:

• 40 Grit: Coarse – Best for heavy-duty material removal and rust stripping

• 60 Grit: Medium – Ideal for general-purpose metal grinding

• 80 Grit: Fine – Great for surface smoothing and paint prep

• 120 Grit: Extra Fine – Perfect for final finishing and polishing

Health & Safety Guidance:

• Always wear protective gloves, goggles, ear defenders, and a dust mask

• Ensure your angle grinder is in good working order and matches disc speed ratings

• Do not use if the disc is cracked or damaged

• Store discs in a dry, cool environment to preserve integrity

Frequently Asked Questions:

• What tools can I use this flap disc with?
  It’s designed for use with any standard 115mm (4½") angle grinder with a 22.2mm bore.

• What materials is 40 grit suitable for?
  Ideal for metal, welds, rust, paint, and heavy sanding on wood.

• What’s the difference between Type 27 and Type 29 flap discs?
  Type 29 (conical) provides better edge contact and is best for contoured or angled workpieces.

• Can I use it for paint removal?
  Yes – 40 grit is excellent for stripping paint and rust from metal or wood surfaces.

• Does it need a backing pad?
  No backing pad is needed – it mounts directly onto the angle grinder.

All Sanding Flap Discs