Concrete Floor Grinding Disc 30/40 Grit Soft Bond - Pack of 9

In this review of the Concrete Floor Grinding Disc pack, the bottom line is simple: these are budget-conscious replacement diamond metal grinding shoes aimed at contractors and concrete preparers who need durable segments for heavy surface work. The pack of nine single-round segments is built for use with Lavina and similar onfloor grinders, and the 30/40 grit, soft bond configuration is optimized for preparing and profiling harder concrete before polishing or coating. For teams that run frequent prep cycles, the discs balance cutting aggression and life at a practical price point.

Key Features

• 30/40 Grit: Delivers aggressive stock removal to remove laitance, glue residues, and minor toppings efficiently on harder concrete surfaces.
• Soft Bond: The softer bond helps expose diamonds faster on hard concrete so the segment maintains cutting performance instead of glazing over.
• Compatibility: Designed for Lavina and onfloor grinders, the round single segments fit common holders used in concrete preparation workflows.
• Single Seg Design: The 25 x 12.5 mm single segment footprint concentrates force for consistent grinding and easier dressing on rough floors.
• Pack of 9: Supplied as a nine-piece set so operators can replace worn segments during a job without delay, reducing downtime.

Who It's For

These grinding discs suit professional floor contractors, prep crews, and maintenance teams that work on hard concrete and need a product focused on aggressive material removal prior to polishing or coating. The 30/40 grit and soft bond pairing is aimed at jobs where exposing aggregate, removing adhesives, or evening rough patches is the primary goal.

Less suitable are users looking for final polishing discs or very fine finishing grits; if the task is fine polishing of terrazzo or a gloss finish, a finer grit or polishing puck would be more appropriate.

Pros & Cons

Pros

• Good stock removal on hard concrete thanks to the 30/40 grit and aggressive segment geometry.
• Soft bond helps sustain cutting on hard slabs, reducing glazing compared with harder bonds.
• Pack of nine provides ready replacements to keep a job moving without repeated reordering.

Cons

• Not intended for fine polishing or finishing work; users will need finer grits for final surface sheen.
• Fitment is squarely for Lavina and similar onfloor grinders, so confirm holder compatibility before purchasing.

Specifications

Brand	ComeFloor (product listing)
Grit	30/40
Bond	Soft bond for hard concrete
Segment size	25 x 12.5 mm (0.98 x 0.49 in)
Compatibility	Lavina, onfloor grinders
Pack quantity	9 pieces

Our Verdict

For contractors who need reliable, aggressive concrete preparation on hard slabs, this nine-pack of 30/40 grit diamond grinding shoes is a practical value. They are not a finishing product, but as replacement segments for Lavina-style onfloor grinders they deliver predictable cutting and reduced downtime when multiple spares are needed on site.

Frequently Asked Questions

Are these discs compatible with my Lavina grinder?
They are designed for Lavina and similar onfloor grinders; verify your holder uses single round segments of the same dimensions before purchasing.

What surface results should I expect?
Expect aggressive stock removal and surface profiling on hard concrete; these are not intended to produce a polished finish.

How many pieces are included and how are they used?
The package contains nine single round segments, intended as replacement grinding shoes for continued concrete preparation during a job.