MBDS Spherical Diamond Grit
MBDS Series / Grain size Coarser than 30 um / Monocrystalline
MBDS Spherical Diamond Grit
MBDS Spherical Diamond Grit is a monocrystalline grade from the MBDS series, produced factory-direct at our own base in Zhengzhou, Henan - the Diamond Capital of China. Standard grain size range: Coarser than 30 um. Each batch is checked for particle size distribution before packing, and can be supplied in trial quantities for process validation.
Advantage
- Rounded, near-spherical morphology instead of a crushed blocky shape
- High specific surface area for the same mass
- Packs and fills more evenly, with fewer voids between particles
- Lower interfacial thermal resistance in composites and thermal interface materials
- More uniform load per particle in a bonded tool
- Supplied from 30/40 mesh and finer
Send your workpiece material, target surface finish and order quantity — we confirm the matching grade and sample route within 24 hours.
Product Overview
MBDS Spherical Diamond Grit is MBD put through a shaping route that rounds the crystal instead of leaving the blocky crushed shape. Rounded particles pack and flow differently, which matters wherever the diamond is a filler or where the bond has to hold a dense, evenly distributed layer.
The shape gives a high specific surface area for the same mass, easier and more uniform filling, fewer voids between particles and therefore lower interfacial thermal resistance in a composite. In a tooling context it means more uniform loading and less localised load per particle.
Typical use is thermal interface materials and diamond-metal composites, high-load metal-bond tools and applications where packing density or thermal path matters more than cutting edge sharpness. Supplied from 30/40 mesh down to 325/400 — 30 µm and coarser.
Standard Grain Size Chart
Spherical diamond grit is MBD taken through a shaping route that rounds the crystal instead of leaving the blocky crushed shape. Because the shape work is done on coarse feed, the range starts at the 30 µm floor and runs up the coarse end of the MBD ladder — the mesh equivalents, ISO 6106 codes and micron windows are shown together below.
| Grade (mesh)Trade standard | D codeISO 6106 | Size range (µm) | Sieve no.Mesh no. |
|---|---|---|---|
| Coarse30/40 – 70/80Saw segments, drill crowns, heavy stock removal | |||
| 30/40 | D602 | 602 – 426 | 30# |
| 40/45 | D426 | 426 – 356 | 40# |
| 45/50 | D356 | 356 – 301 | 45# |
| 50/60 | D301 | 301 – 251 | 50# |
| 60/70 | D251 | 251 – 213 | 60# |
| 70/80 | D213 | 213 – 180 | 70# |
| Medium80/100 – 170/200Metal-bond wheels for glass, ceramic and stone | |||
| 80/100 | D180 | 180 – 151 | 80# |
| 100/120 | D151 | 151 – 126 | 100# |
| 120/140 | D126 | 126 – 107 | 120# |
| 140/170 | D107 | 107 – 91 | 140# |
| 170/200 | D91 | 91 – 76 | 170# |
| Fine200/230 – 325/400Fine metal-bond tools — the 30 µm floor of the spherical range | |||
| 200/230 | D76 | 76 – 64 | 200# |
| 230/270 | D64 | 64 – 54 | 230# |
| 270/325 | D54 | 54 – 46 | 270# |
| 325/400 | D46 | 46 – 38 | 325# |
Supplied from 30/40 mesh down to 325/400 — that is, 30 µm and coarser. Fractions below 30 µm are supplied as the standard crushed MBD ladder instead. Tell us the target mesh band and the packing density you need and we will confirm the shaping route.
Recommended Applications
Factory Checks Behind This Grade
HNHONGXIANG has produced synthetic diamond powder since 1990 in Henan, China. The factory covers about 124,000 square meters and supplies micron powder, diamond grit, coated diamond and functional diamond materials for global abrasive and precision processing customers.
Batch particle-size inspection
Laser diffraction PSD checked before packing, for stable batch-to-batch performance.
Factory-direct processing
Grading, washing, drying and packing handled in our own plant.
Custom grades available
Grade selection and private-label packaging to your specification.
Export support
Samples, trial orders and bulk shipments with full batch documents.
Packing And Export Options
Standard packing includes sealed bottles, bags or drums according to particle size and order quantity. Inner packaging is moisture-resistant and clearly labeled with product model, grain size, batch number and net weight.
Multiple package options
Sample, kilogram and bulk orders.
Moisture-resistant packing
Sealed bottles, bags or drums.
Clear labeling
Model, grain size, batch no. and net weight.
Export ready
Cartons or drums for air, express or sea.
Bottle package
50 / 100 / 150 / 200 / 300 / 500 / 1000 / 2000 / 3000 / 5000 / 10000 ct
Bag package
100 ct – 10000 ct sealed foil bags, labelled per batch.
Shipping methods
Air, express or sea freight according to order quantity.
Spherical MBDS Against Standard MBD
MBDS and MBD are the same diamond family at the same strength class. The difference is shape, and the shape decides which one wins in a given application.
| Property | MBDS (spherical) | MBD (blocky crushed) | Why it matters |
|---|---|---|---|
| Particle shape | Rounded, near-spherical | Blocky, angular, sharp-edged | Rounded particles pack; angular particles cut |
| Packing density | Higher, fewer voids between particles | Lower, more voids | Fewer voids means a better thermal path in a composite |
| Specific surface area | High for the same mass | Lower | More contact area with the bond or matrix |
| Edge sharpness | Blunted | Sharp | Sharp edges cut faster; rounded particles hold a bond better |
| Typical use | Thermal interface materials, diamond-metal composites, dense bonded tools | Saw segments, drill crowns, metal-bond grinding wheels | Choose by whether the problem is heat or stock removal |
What To Include
Send the current product, particle size target and process problem. We will confirm the matching grade, sample route and packing option.