Stone Grinding Disc
We refer to these disc-shaped tools—used for the coarse, medium, and fine grinding as well as the polishing of stone surfaces—as Diamond Grinding Discs, STone Grinding Discs, or Stone Polishing Discs. They are typically mounted on semi-automatic or manual handheld stone polishing machines and bridge-type single-head polishing machines, and can also be used on continuous stone polishing lines. Their primary advantages are low cost and operational flexibility; they can polish slabs of varying thicknesses without requiring a large footprint, offering great versatility.
These discs are generally categorized into metal-bond Diamond grinding discs, resin-bond Diamond grinding discs, and buffing discs.
The standard processing sequence is: metal grinding disc → resin grinding disc → buffing disc.
Applicable Machinery
Flexible application to various fully automatic/semi-automatic/manual stone polishing machine assembly lines
Hot Product
Cheefung metal‑bond diamond Grinding & Polishing Discs are intended for rough‑polishing granite slabs on either automatic grinding lines or single‑head polishers. They deliver both high efficiency and extended wear life. The complete disc features a strong round steel backing combined with fast‑cutting diamond segments that can be firmly attached to the polishing head for grinding and calibration work. These discs are designed for wet use only, with adequate water supply required throughout the process. Commonly supplied grit sizes include #30, #50, #100, #200, and #400.
2-Resin Bond diamond grinding Disc
Our resin‑bond diamond grinding & polishing discs feature a plastic base with resin segments attached. They're designed to deliver smooth polishing on granite, marble, and other stone surfaces, and they run on automatic grinding machines or single‑head polishers. To achieve a great overall finish, we recommend using them in combination with metal‑bond grinding discs for the initial roughing stage. The resin segments come in different formulations – you can choose a sharp type for faster cutting or a more durable type for extended use. These discs are for wet use only, so make sure there's enough water during operation. The disc body is plastic with screw holes for mounting. We typically supply grits #500, #800, #1500, and #3000.
This buff polishing disc is made from pressed abrasives with a proprietary bond. It's used for the final polishing or buffing stage on granite surfaces – from soft to hard grades – and works well on both automatic polishing lines and manual machines. It's particularly popular for polishing granite strips or tiles up to 1.2 meters wide. The disc gives you high processing efficiency, fast results, and a shine that lasts. With this buff, you can easily achieve a gloss reading of 85 to 110 degrees. For color matching, we offer black buffs for dark granites and white buffs for light granites. If you're working with red or brown granites, a red buff is sometimes preferred, and we can make that available on request. Just remember: this is for wet use only, so keep a steady water supply running during operation.
The magnesite grinding disc consists of a cast-iron base plate combined with magnesite grinding segments.
Key raw materials for the grinding segments:
Binder: Magnesium oxychloride cement (cured using magnesium oxide and magnesium chloride brine; commonly known as magnesite).
Cutting abrasive: Black or green silicon carbide (contains no diamond particles); grinding is achieved via the silicon carbide.
Manufacturing process: Formed through ambient-temperature curing and bonded to a heavy-duty handheld grinding disc holder (available in 250mm, 300mm, or 350mm sizes); compatible with handheld polishing machines used for large slabs and tombstones.
5-oxalic acid polishing disc
Oxalic acid grinding disc consists of cast iron hollow base and solid oxalic acid segments, without diamond grit. It is the final buff abrasive specially for marble, travertine and terrazzo slabs after resin diamond polishing disc. It combines physical fine grinding and chemical brightening to remove yellow stains, water marks and hazy surface, delivering transparent high mirror gloss for carbonate stone. Two grades available: 5 Extra for stain removal, 10 Extra for super high gloss finishing.
Service life of metal grinding disc
What is the service life of a metal-bond diamond grinding disc?.
1 Processing area by grit size
(total processed surface area for a complete set of grinding segments)
1) Extra-coarse grit #30 / #50 / #60
highest material removal rate, fastest wear
- Standard metal bond: 35,000–45,000 m²
- High-cobalt wear-resistant modified metal formula: 40,000–48,000 m²
2) Mainstream coarse grinding grits #80 / #120
highest factory usage; primary choice for slab leveling
- Standard metal bond: 38,000–48,000 m²
- High-cobalt wear-resistant modified metal formula: 43,000–52,000 m²
3) Coarse-to-fine transition grits #180 / #200
finishing the coarse grinding stage; refining deep scratch patterns
- Standard metal bond: 42,000–50,000 m²
- High-cobalt wear-resistant modified metal formula: 47,000–55,000 m²
2 Impact of Stone Material on Service Life
- Standard light-colored granite and standard marble blocks: Baseline service life remains unchanged
- High-hardness stone (e.g., Black Galaxy, Indian Black, quartzite, extra-thick headstones): Service life reduced by 15%–25%
- Slabs with extensive epoxy repairs or hardened cement deposits: Accelerated wear; service life shortened by 20%–30%
3 Key Factors Affecting Operating Conditions
1) Cooling Water Supply
- Insufficient water or low flow rates cause sustained high-temperature scorching of the metal matrix, leading to rapid diamond loss and a reduction in service life of over 40%; high-volume water cooling throughout the process is required to achieve the standard service life.
2) Head Downward Pressure
- Excessive pressure or forced, rapid cutting doubles the load on the grinding segments, reducing service life by more than 25%.
3) 24-Hour Continuous Production vs. 8-Hour Intermittent Production
- Continuous grinding around the clock leads to heat accumulation, shortening service life by approximately 15%; intermittent processing with machine downtime for natural cooling results in more stable service life.
4) Grinding Segment Formulation
- Standard low-cobalt metal matrices offer average cost-performance; high-cobalt, high-density sintered formulations provide 15%–20% greater wear resistance, making them ideal for processing hard stone in facilities operating 24 hours a day.
4 Comparative Reference (Grit #120)
| Grinding Disc Type | Service Life per Disc |
| Metal-bond diamond grinding disc | 38,000–52,000 m² |
| Resin-bond diamond grinding disc | 18,000–30,000 m² |
| Buffing sponge/fiber polishing disc | 10,000–20,000 m² |
Tips:
Located within a major industrial cluster for stone and diamond tools, Cheefung have leveraged local advantages to refine the formula for our traditional metal-bond diamond grinding discs, extending their service life by 12–20%. These discs deliver outstanding performance, particularly on high-hardness granite. Thanks to the region's cost efficiencies, our products are highly competitively priced, offering superior value in both domestic markets (such as Shuitou and Yunfu) and international markets across Southeast Asia and beyond. If you are involved in the processing of stone slabs, strips, thick blocks, or monuments, we invite you to try our grinding discs—offered via factory-direct sales, they ensure stable performance and excellent cost-effectiveness.
FAQ
Q: What’s the connection between metal bond disc, resin bond disc and buff polishing disc?
A: They are three matched abrasives for complete stone polishing sequence: metal bond for rough calibration, resin bond for medium & fine grinding, buff disc for final transparent mirror finishing. All fit the same heavy hand polishing machine with 250/300/350mm iron base.
Q: Can I use buff disc to grind deep scratches?
A: No. Buff disc has no coarse diamond particles, it cannot remove unevenness or deep saw marks, only works as last finishing step after resin diamond disc.
Q: What is the service life of metal bond diamond grinding disc?
A: Under sufficient water cooling and standard machine pressure for normal granite slabs: Coarse grit #30–#60: 35,000–48,000 sqm per set of segments Medium rough grit #80–#120: 38,000–52,000 sqm per set Fine rough grit #180–#200: 42,000–55,000 sqm per set High-cobalt metal formula extends lifespan by 15%–20%. Service life will drop sharply without enough cooling water or when polishing hard quartzite & black granite tombstones.
Q: Can magnesite disc replace metal bond disc for slab leveling?
A: No. Silicon carbide has weak cutting power, it cannot remove deep saw scratches and uneven slab surface, only for transitional fine grinding after rough calibration.
Q: Why magnesite segments wear out very fast?
A: Magnesite bond has poor water resistance, long-time wet grinding and excessive head pressure will accelerate powdering and segment loss. Intermittent production and proper water flow can extend service life.
Q: Can I use magnesite disc for luxury onyx polishing?
A: Not recommended. Hard silicon carbide particles will leave permanent scratches on fragile translucent onyx stone.
Q: Can oxalic acid disc polish granite?
A: No. Oxalic acid only reacts with calcium carbonate stone like marble & travertine, it has no polishing effect on siliceous granite and quartzite.
Q: Why white spots appear after oxalic polishing?
A: Insufficient cooling water or incomplete water rinse leads to residual oxalic crystal precipitation. Increase water flow and flush slabs fully after finishing.
Q: Can I skip resin diamond disc and use oxalic disc directly?
A: Absolutely not. Oxalic acid segment has no cutting capacity to remove scratches, it only works as last finishing step after full fine grinding by resin diamond abrasives.
As one of the most experienced stone grinding disc enterprises in China, we are able to meet the needs of the majority of our customers. Please feel free to wholesale advanced stone grinding disc made in China here from our factory. For price consultation, contact us.