MBD High-Strength Diamond Grit
MBD Series / Grain size 18/20 - 70/80, 80/100 - 325/400, 400/500 - 500/600 mesh / Monocrystalline
MBD High-Strength Diamond Grit
MBD High-Strength Diamond Grit is a monocrystalline grade from the MBD series, produced factory-direct at our own base in Zhengzhou, Henan - the Diamond Capital of China. Standard grain size range: 18/20 - 70/80, 80/100 - 325/400, 400/500 - 500/600 mesh. Each batch is checked for particle size distribution before packing, and can be supplied in trial quantities for process validation.
Advantage
- Blocky, dense crystals selected for strength rather than surface gloss
- Impact toughness (TI) and thermal impact toughness (TTI) measured mesh by mesh
- Compressive strength recorded in newtons for every grade
- Grades MBD2 to MBD12, mapped to GE, De Beers, Element Six and ZND equivalents
- Supplied from 30/40 mesh down to 400/500 mesh
- Ships in 5 to 7 working days
Send your workpiece material, target surface finish and order quantity — we confirm the matching grade and sample route within 24 hours.
Product Overview
MBD High-Strength Diamond Grit is our metal-bond grade: the particle that goes into a saw segment, a drill crown or a metal-bond grinding wheel and has to survive the load without shattering. The crystals are blocky and dense, selected for strength rather than for the gloss of the surface.
Grades run from MBD2 to MBD12, and every mesh range is measured for impact toughness (TI), thermal impact toughness (TTI) and compressive strength in newtons rather than being released on a visual inspection alone. Because MBD is routinely specified by the competitor code a tool maker already runs, the equivalent GE, De Beers, Element Six and ZND designations are listed further down this page.
Supply runs from 30/40 mesh down to 400/500 mesh. Stone saw segments and rope saws typically take the coarse cuts (30/40 to 45/50); metal-bond glass and ceramic wheels take the medium cuts; fine metal-bond wheels take 200/230 and finer. For low-price markets where tool life is traded for cost, RVD or MBD4 to MBD6 grades are the usual choice instead.
Standard Grain Size Chart
MBD high-strength diamond grit is the metal-bond grade: selected for crystal strength and blocky shape so it survives the load inside a saw segment or a drill crown instead of fracturing on first contact.
| 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 – 400/500Fine metal-bond wheels and finishing tools | |||
| 200/230 | D76 | 76 – 64 | 200# |
| 230/270 | D64 | 64 – 54 | 230# |
| 270/325 | D54 | 54 – 46 | 270# |
| 325/400 | D46 | 46 – 38 | 325# |
| 400/500 | — | — | 400# |
The table above is the standard stock ladder, 30/40 to 400/500 mesh. The full MBD range is 18/20 to 70/80 mesh (coarse cut) and 80/100 to 325/400 (fine cut), with 400/500 to 500/600 available to order. Impact toughness (TI), thermal impact toughness (TTI) and compressive strength are measured mesh by mesh — the measured values sit in the table below.
Measured Impact Toughness And Ash Content
The values below are measured on our own batches, not catalogue figures. Impact toughness (TI) is the unbroken fraction after ball-mill impact and is reported in percent; ash content is the non-diamond residue after combustion, reported in percent by weight. Both are measured mesh by mesh, which is why the same grade shows a different number at 30/35 and at 230/270.
| Mesh sizeFEPA / US mesh | Impact toughness, TI (%)Unbroken fraction after impact | Ash content (%)Residue after combustion |
|---|---|---|
| SMD30Premium, near-isotropic4 mesh ranges tested | ||
| 30/35 | 90.2 | 0.0013 |
| 40/45 | 90.1 | 0.0004 |
| 140/170 | 83.84 | 0.001 |
| 230/270 | 79.78 | 0.0017 |
| SMD25Premium2 mesh ranges tested | ||
| 30/35 | 88.38 | 0.0012 |
| 40/45 | 88.2 | 0.0007 |
| MBD12Highest standard strength15 mesh ranges tested | ||
| 20/25 | — | 0.0005 |
| 25/30 | — | 0.0002 |
| 30/35 | 85.2 | 0.0019 |
| 35/40 | — | 0.0008 |
| 40/45 | 86.3 | 0.0002 |
| 45/50 | — | 0.0002 |
| 60/70 | 77.95 | 0.0017 |
| 80/100 | 72.5 | 0.0003 |
| 100/120 | 81.98 | 0.0007 |
| 120/140 | 78.86 | 0.0003 |
| 140/170 | 82.34 | 0.0005 |
| 170/200 | 83.37 | 0.0012 |
| 200/230 | 81.85 | 0.0017 |
| 230/270 | 78.71 | 0.0017 |
| 270/325 | 82.25 | 0.0018 |
| MBD10High strength2 mesh ranges tested | ||
| 30/35 | 82 | 0.0028 |
| 40/45 | 83.5 | 0.0006 |
| MBD8High strength6 mesh ranges tested | ||
| 30/35 | 73.88 | 0.0049 |
| 40/45 | 80.08 | 0.0003 |
| 100/120 | 69.48 | 0.003 |
| 120/140 | 74.33 | 0.0006 |
| 140/170 | 77.98 | 0.0014 |
| 230/270 | 77.29 | 0.0026 |
| MBD6Medium strength2 mesh ranges tested | ||
| 30/35 | 65.55 | 0.0093 |
| 40/45 | 67.8 | 0.0043 |
| MBD4Economy strength5 mesh ranges tested | ||
| 30/35 | 47.03 | 0.0082 |
| 40/45 | 46.7 | 0.0094 |
| 60/70 | 43.85 | 0.002 |
| 140/170 | 61.24 | 0.0062 |
| 230/270 | 68.63 | 0.005 |
MBD2 and other grades outside this table run through the same inspection regime; ask for the values on the mesh range you are buying and they are issued with the batch documents. Higher TI at a given mesh means the crystal survives longer in the bond; lower ash means less non-diamond material entering the matrix.
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.
MBD Grade Equivalents Across Suppliers
Buyers routinely specify MBD by the grade code they already run. The table below maps the MBD and SMD strength classes to the equivalent GE, De Beers, Element Six and ZND designations, so you can quote us the code you know.
| HNHONGXIANG | GE (MBS) | De Beers (SDA) | Element Six (SDB) | ZND |
|---|---|---|---|---|
| MBD2 | MBS-910 | SDA-25 | — | 10 |
| MBD4 | MBS-915 | SDA-35 | SDB1025 | 15 |
| MBD5 | MBS-920 | SDA-45 | SDB1045 | — |
| MBD6 | MBS-930 | SDA-55 | SDB1055 | 20 |
| MBD8 | MBS-940 | SDA-65 | SDB1065 | 30 |
| MBD10 | MBS-950 | SDA-75 | SDB1075 | 40 |
| MBD12 | MBS-955 | SDA-85 | SDB1085 | 60 |
| SMD25 | MBS-960 | SDA-100 | SDB1100 | 80 |
| SMD30 | MBS-970 | — | SDB1125 | 90 |
What To Include
Send the current product, particle size target and process problem. We will confirm the matching grade, sample route and packing option.