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Bosch Grinding Wheels EXPERT R781 Prisma Ceramic Fibre Disc 125 mm - X-LOCK - 22.23

Bosch Grinding Wheels EXPERT R781 Prisma Ceramic Fibre Disc 125 mm - X-LOCK - 22.23

Up to 4x faster than standard fibre disc - Grinding down welds on fabricated metal workpieces is t...

Best current price£62.63from B&Q

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B&QB&Q - Expert X-Lock Prisma Ceramic Fibre DiscR781 Metal125mm22.23mmG36
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£62.63
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eBayBosch X-LOCK Ceramic Discs 125mm Grain 36 25pieces
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Tooled UpBosch Professional Bosch Expert Prisma Ceramic X Lock Fibre Disc 125Mm
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Rapid Online - Rapid Electronics Ltd.Bosch 2608621794 X-LOCK Ceramic Discs 125mm Grain 36 25pieces
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Product Information

Full details

This Bosch EXPERT R781 Prisma Ceramic Fibre Disc is designed for professionals who need to quickly grind down welds on fabricated metal workpieces. Its key benefit is significantly faster stock removal, up to 4x that of standard fibre discs, thanks to its advanced Prisma Ceramic technology. A potential caveat is that its specialized nature might be overkill for very light-duty grinding tasks.

All features

Model Part Number2 608 621 794
BrandBosch

Extended Product Information

FAQs

What is Prisma Ceramic technology?

Prisma Ceramic technology uses specially shaped, highly sharp ceramic grains in a triangular form. This design allows the grains to cut more effectively and efficiently into the material, leading to faster stock removal and a longer-lasting, self-sharpening effect.

How much faster is this disc compared to standard fibre discs?

The Bosch EXPERT R781 Prisma Ceramic Fibre Disc can achieve stock removal up to 4x faster than standard fibre discs.

Can I use this disc on a standard angle grinder without X-LOCK?

Yes, while it features the X-LOCK system for quick changes, the disc also fits standard angle grinders with a 22.23 mm bore diameter when used with a standard rubber backing pad and securing nut.

What materials is this disc suitable for?

This disc is specifically designed for grinding metal, including steel and stainless steel sheet (thin).

What are the main applications for this disc?

Its primary applications include grinding welds, weld preparation and removal, scale removal, blending, and removing discoloration from metal workpieces.

How does the self-sharpening effect work?

The unique structure of the Prisma Ceramic grain causes it to fracture in a way that continuously exposes new, sharp cutting edges, maintaining its efficiency and speed over its lifespan.

What is the diameter and bore size of this disc?

The disc has a diameter of 125 mm and a bore diameter of 22.23 mm.

Troubleshooting

Disc not cutting efficiently

Ensure the disc is correctly mounted and the angle grinder is operating at the appropriate speed. Check if the Prisma Ceramic grains have worn down significantly, indicating it's time for a new disc.

Excessive vibration during use

Check that the disc is properly seated on the backing pad and securely fastened. Inspect the backing pad for damage or wear. Ensure the angle grinder itself is in good working order.

X-LOCK attachment not engaging

Verify that the angle grinder has the X-LOCK interface and that both the disc and the grinder interface are clean and free from debris. Ensure the disc is fully aligned with the X-LOCK system before pressing.

Premature disc wear

Confirm you are using the disc for its intended application (grinding metal). Excessive pressure or grinding on inappropriate materials can lead to faster wear. Ensure correct RPM and angle of attack.

Pros and Cons

Pros

  • Significantly faster stock removal compared to standard discs.
  • Longer lifespan due to self-sharpening ceramic grain.
  • Reduced heat buildup allows for more comfortable and extended use.
  • X-LOCK system enables quick and tool-free disc changes.
  • Consistent grinding performance over time.

Cons

  • May be overly aggressive for very fine or delicate grinding tasks.
  • The full benefit of X-LOCK requires a compatible angle grinder.
  • Requires proper safety precautions due to its high-speed grinding capability.

Setup, Compatibility & Care

Setup: The EXPERT R781 disc features the X-LOCK system for quick attachment. Simply align the disc with the X-LOCK interface on compatible angle grinders and press until it clicks into place. For standard angle grinders with a nut and thread interface, the disc can be mounted using the standard backing pad and securing nut.

Compatibility: This disc is designed for use with angle grinders. It is fully compatible with Bosch angle grinders featuring the X-LOCK system. It also fits standard angle grinders that use a 22.23 mm bore diameter and a conventional nut and thread mounting system. Ensure your angle grinder's RPM rating is suitable for this type of abrasive disc.

Care: Always wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and hearing protection. Inspect the disc for any damage before mounting. Store discs in a dry environment away from extreme temperatures. After use, allow the disc to cool down before removal. Clean any dust or debris from the backing pad and grinder interface.

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