Double-sided 406 mm silicon carbide sanding discs for floor sanders

Double-sided grinding wheels, 406 mm diameter — professional-grade silicon carbide

At Riwo Commerce, you’ll find high-quality double-sided sanding discs with a diameter of 406 mm and a 25 mm bore —compatible with all standard single-disc machines and floor sanders. Our double-sided sanding discs come directly from the manufacturer-importer with no middlemen, and thanks to our in-house production, they are often 30% cheaper than those from German brand manufacturers —while offering comparable or even better quality.

What makes double-sided grinding wheels so efficient?

The biggest advantage of these sanding discs is right there in the name: both sides are fully coated and ready for use. When one side is worn out, simply flip the disc over—and keep working at full sanding power. This effectively cuts your material usage in half and saves time when changing discs. Ideal for large surfaces, renovation projects, and industrial floor restoration.

Premium silicon carbide — the right choice for hard materials

Our discs use open-grit silicon carbide on a sturdy fabric backing with a synthetic resin bond. Silicon carbide has exceptional edge retention and is particularly suitable for:

• Mineral-based materials: stone, concrete, screed, granite, marble
• Building materials: plaster, joint compound, Styrofoam
• Versatile: Also suitable for wood, paint, varnish, and coatings
• Renovation: Removal of old maintenance layers, wax, and sealants

Compatible with all standard floor sanders

Our 406-mm dual grinding discs fit all single-disc machines with a drive plate diameter of 406 mm and a 25-mm bore. A selection of compatible machines:

• MENZER: ESM 406 and other single-disc machines
• Bona: FlexiSand, single-disc pad sander
• Lägler: Single-disc machines
• Wolff: Tango and similar models
• FG, Kuenzle & Tasin, Janser, and other professional machines

The screw fastening through the 25-mm center hole ensures a vibration-free, secure fit on the drive plate—even at high speeds and under high pressure.

Complete range of grit sizes from K16 to K100

The right grit for every step—from rough grinding to fine sanding:

• K16 (Extra Coarse): Maximum material removal — old screeds, wax and varnish coatings, thick layers of filler
• K24 (Coarse): Coarse grinding of concrete and stone floors; removal of old coatings
• K36 (Coarse): Standard coarse grit for concrete restoration and screed work
• K40 (Coarse–Medium-Coarse): Pre-sanding for parquet renovation and initial sanding of wood floors; removes varnish residue and evens out the coarser sanding marks left by K24/K36 sanding; ideal preparation for K60/K80
• K60 (medium-coarse): Intermediate sanding after K16/K24 — removes coarse sanding marks
• K80 (Medium): Preparation for the final finish, uniform sanding pattern
• K100 (Fine): Fine sanding before sealing or coating

Direct from the manufacturer — wholesale prices even for small quantities

As a manufacturer and importer, we produce our products in our own factories and ship directly to Germany— with no middlemen and no markups. This has consistently made us 30% cheaper than German brand manufacturers. We already supply well-known specialty retailers in southern Germany—a clear sign of confidence in our quality.

Packaging units — from single-pack to bulk containers

We offer our double-sided sanding discs in flexible packaging options—suitable for projects of any size:

• Pack of 5: Ideal for small renovation projects and DIY enthusiasts
• Pack of 10: Standard size for floor installers and medium-sized projects
• 20-pack: Professional bulk pack offering the best unit price for professionals and large-scale projects

Who are our double-sided grinding wheels designed for?

• Floor Restoration & Installation: A complete range of products for every stage of the sanding process, all from a single source.
• Screed & Concrete Contractors: Coarse grit for effective material removal.
• Parquet & Renovation Professionals: Finer grits for high-quality results.
• Industrial facilities & cleaning companies: Bulk containers for regular use.
• Home Improvement & DIY: Professional-quality products, even in small quantities — no minimum order.
• Wholesalers & Resellers: Attractive B2B terms available upon request.

Frequently Asked Questions About Double-Sided Grinding Wheels

What does "double-sided" mean when referring to grinding wheels?

With a double-sided grinding wheel, both sides of the wheel are coated with abrasive grit. When one side is worn out, simply flip the wheel over and use the other side—this effectively doubles the service life of each wheel and saves on material and costs.

What grit size do I need for my application?

For removing screed or thick layers, start with K16 or K24. K36 is sufficient for standard concrete grinding. Then gradually move to finer grits: K60 → K80 → K100/K120 for the final grind before sealing or coating. For wood floors, K24/K36 is usually used for the initial sanding, followed by K60/K80 for the intermediate sanding.

Which machines are these discs compatible with?

Our double grinding discs fit all single-disc machines and floor grinders with a drive plate diameter of 406 mm and a 25-mm center hole—for example, the MENZER ESM 406, Bona single-disc machines, Lägler Single-Disc, Wolff Tango, FG, Kuenzle & Tasin, and many others. If you have any questions about compatibility, please feel free to contact us.

How do I install the window properly?

Secure it using the central 25-mm hole and the screw from your single-disc sander. Make sure it is tight—a loose disc causes vibrations, premature wear, and uneven sanding results.

Are the discs also suitable for hardwood floors?

Yes, our silicon carbide double-sided sanding discs can also be used on wooden floors—especially for removing old varnishes, waxes, and sealants. However, for sanding bare wood (parquet renovation), we recommend our special hook-and-loop sanding discs or sanding belts with corundum or zirconium grit.

How quickly will my order be delivered?

All standard sizes are in stock at our Taufkirchen warehouse (near Munich) and are typically shipped within 24 hours.

Do you also offer custom sizes or custom grit sizes?

For large-scale projects and special requests, please feel free to contact us directly—as a manufacturer and importer, we can respond flexibly to your specific needs.