Concrete floor preparation
The primary application. Removing coatings, adhesive and surface laitance before a new floor goes down.
Floor grinding series
QZ / FLOOR
Floor Grinding Blocks
Diamond grinding blocks for concrete floor preparation and polishing — a grit sequence from coarse to fine, with the bond matched to the floor hardness.
A floor is ground in steps, not in one pass. Coarse grit removes the surface and flattens; each finer step removes the scratches of the one before it. Skip a step and the scratches stay visible under the sealer. The bond, meanwhile, has to suit the floor: a hard floor needs a soft bond, and a soft, green floor needs a hard one. Hubei Qianzhao Diamond Tools Co., Ltd (Ezhou, Hubei) produces 3 million diamond segments a year and exports to 14 countries.
- Format
- Grinding block
- Grit
- Coarse–fine
- Bond
- Matched to floor
- MOQ
- On quotation
11 / FLOOR
Grit sequence
- CoarsegritSurface removal, levelling, coating removal
- MediumgritScratch removal after the coarse step
- FinegritDensifying and pre-polish
- PolishgritFinal finish before sealer
Grit numbers, block dimensions and the mounting format are confirmed on quotation against your grinder and the floor.
4
Grit steps, coarse to polish
3M
Segments produced per year
100%
Bond matched to floor hardness
HF
Produced in-house
02
Overview
How many grit steps does a floor need?
At least four for a polished finish, and more if the floor is rough or coated. The rule is simple: each step must remove the scratches of the previous one, so the jump between grits has to stay small.
| What you are cutting | What to ask for |
|---|---|
| Coating and adhesive removal | Coarse bond, aggressive — remove the layer without gouging the concrete |
| Flattening a rough or uneven slab | Coarse to medium, with a rigid block so the machine cuts flat rather than following the dips |
| Densifying before sealer | Fine grit — the surface is closed up before the densifier goes on |
| Polished concrete finish | Full sequence, coarse to polish, with even step spacing |
The most common mistake is jumping from a coarse grit straight to a fine one to save time. It does not save time: the fine block has to remove deep scratches, so it wears out fast and the finish still shows them. Step through the grits.
03
Technical specifications
What are the specifications of the grinding blocks?
Grit, bond and block dimensions are set per floor and per machine. They are confirmed on your quotation.
| Product name | Floor Grinding Block diamond, concrete floors |
|---|---|
| Grit range | Coarse to polish full sequence on quotation |
| Bond hardness | Matched to floor hardness hard / standard / soft |
| Block dimensions | Confirmed on quotation matched to your plate |
| Mounting format | Confirmed on quotation send a photo of your plate |
| Cutting method | Wet or dry bond matched to the method |
| Primary materials | Concrete, terrazzo, screed |
| Compatible equipment | Floor grinder, edge grinder, hand-held grinder |
| Minimum order | Confirmed on quotation |
03A
Full series
Which grit for which stage?
The stage of the job decides the grit. The bond is set separately, from the floor hardness.
| Stage | Grit | Purpose | Note |
|---|---|---|---|
| Stripping | Coarse | Remove coating, adhesive, surface laitance | Aggressive bond, rigid block |
| Flattening | Coarse–medium | Level the slab, remove high spots | Rigid block so the machine cuts flat |
| Refining | Medium–fine | Remove the scratches of the previous step | Keep the step spacing even |
| Polishing | Fine–polish | Close the surface before densifier and sealer | Even passes, overlapping |
Grit numbers, block dimensions and mounting format are confirmed on the quotation. Send the plate photo with your inquiry.
05
Applications
Where are these blocks used?
Built for concrete floor preparation and polishing. Selection should account for the floor hardness, the finish required and the machine plate.
Polished and densified concrete
A full grit sequence, stepped evenly, is what produces a finish that reads as polished rather than painted.
Terrazzo and screed
Softer and more abrasive than concrete, so a harder bond is used to avoid wearing the block out before the surface is closed.
06
Customization
Can the logo and packaging be customized?
Logo
Blocks can be marked to match your brand. Marking is confirmed against the block size.
Packaging
Skin packaging, colour boxes and neutral export cartons — including cartons with no branding for distributors.
Specification
Grit, bond hardness, block dimensions and mounting format are set per order, subject to a minimum order quantity.
07
Manufacturing
What is Hubei Qianzhao's manufacturing capability?
Qianzhao has been making diamond tools in Ezhou, Hubei for seven years. The plant produces 100,000 blades and 3 million diamond segments a year, and exports to 14 countries.
Blocks are pressed and sintered in-house alongside the segment line. Producing 3 million segments a year is what allows grit and bond to be set per order.
08
FAQ
What should I confirm before ordering grinding blocks?
How do I know which bond to use?
From the floor. A hard, dense, old floor needs a soft bond so the metal wears and exposes diamond; a soft, green floor needs a hard bond so the block does not disappear. Tell us the floor age and hardness.
How many grit steps do I need?
At least four for a polished finish, and more on a rough or coated floor. Each step has to remove the scratches of the previous one — the jump between grits should stay small.
Can I grind dry?
Wet grinding gives longer block life and no dust, but many site jobs are done dry with extraction. Confirm the method when you order — the bond is matched to one or the other.
Which mounting format do you supply?
It depends on your machine plate. Send a photo of the plate with the inquiry and we will quote the matching format.
What is the minimum order quantity?
Confirmed on quotation, normally by grit set rather than by single block.
09
Request a quote
How can I request a quote?
Share the order quantity, cutting machine, material and destination market so your inquiry can be reviewed clearly.
Manufacturer
Hubei Qianzhao Diamond Tools Co., Ltd
Email
[email protected]
WhatsApp
+86 158 7152 3058
Phone
+86 139 7199 8582
Lead time
By order