Silverline Zirconium HD Flap Disc Sanding Grinding 115mm 60G 868821

Silverline Premium Zirconium HD Flap Disc Sanding Grinding 115mm 60 grit 868821

Barcode: 5055058198631

MPN: 868821

Overview:

The Silverline Premium 60 grit Zirconium HD Flap Disc 115mm 868821 a heavy-duty sanding and grinding disc designed for fast, controlled material removal with a cleaner finish than a standard grinding wheel. Ideal for dressing welds, removing parting lines on castings and working carbon steels, it uses zirconium abrasive with high grain adhesion for long wear and consistent cutting. The self-renewing flap design exposes fresh abrasive as it works, helping maintain performance and extend disc life. Suitable for steel, stainless steel, cast iron and many alloys, it also handles a wide range of general sanding and grinding tasks on materials such as paint and fibreglass. Fits directly to a compatible angle grinder with no additional backing disc required.

Key Features

• 60 grit grade for rapid removal with improved control and blending

• Zirconium abrasive for strong cutting action and long disc life

• High grain adhesion and self-renewing flap design for consistent performance

• Ideal for grinding, finishing, stock removal and weld dressing

• Suitable for steel, stainless steel, cast iron and many alloys

• Mounts directly to an angle grinder (no backing pad required)

• Semi open coat helps reduce loading and keeps the disc cutting effectively

Specifications

• Brand: Silverline

• MPN: 868821

• Barcode: 5055058198631

• Disc Diameter: 115mm

• Grit: 60 grit

• Abrasive Material: Zirconium

• Abrasive Connection: Resin

• Surface Finish: Semi open coat

• Max Speed: 13,300rpm

• Tool Type: Hand-held angle grinders (compatible size/mounting)

• Construction: Abrasive segments bonded to fibreglass disc with steel reinforcing ring

• Backing Disc Required: No

Applications

• Weld dressing and blending

• Stock removal and surface clean-up

• Removing parting lines on castings

• Deburring edges and preparing metal for coating

• General sanding/grinding on paint, fibreglass and similar surfaces (task dependent)

How to Use

• Check your angle grinder and guard are suitable for a 115mm disc

• Ensure your grinder’s RPM does not exceed the disc’s 13,300rpm rating

• Fit the flap disc securely following the grinder manufacturer instructions

• Allow full speed before contacting the workpiece

• Use steady, controlled pressure and keep the disc moving to reduce heat build-up

• Step up to finer grits (80/120) if a smoother finish is required

Silverline 115mm Zirconium Flap Disc 60 Grit – Key FAQs

• What is 60g best used for on a flap disc?
  60g is a strong all-round choice for grinding and blending—ideal for weld dressing, stock removal and surface preparation where you want fast cutting without the harshness of 40 grit.

• Can this flap disc be used on stainless steel?
  Yes. It’s suitable for stainless steel as well as mild steel, cast iron and many alloys. Use controlled pressure and keep the disc moving to help reduce heat and discolouration.

• Do I need a backing pad with this disc?
  No. This flap disc fits directly to a compatible angle grinder, making it quicker to set up and reducing the need for extra accessories.

• What does “self-renewing” mean on a flap disc?
  As the flaps wear, new abrasive is exposed, helping maintain cutting performance over the working life of the disc compared with flat abrasive discs.

• What does the 13,300rpm rating mean?
  It’s the maximum safe operating speed for the disc. Always check your grinder’s no-load speed is at or below this rating before use.

• How do grit grades work for flap discs?
  Lower grit numbers (e.g., 40) are coarser for faster removal, while higher numbers (up to around 120) are finer for finishing and surface refinement.

How The Grit Grades Work 40 grit being coarse 120 grit being the finest