N Nickel-Coated Diamond (HDY-N)
N Series / Grain size W7 and coarser / Monocrystalline
N Nickel-Coated Diamond (HDY-N)
N Nickel-Coated Diamond (HDY-N) is a monocrystalline grade from the N series, produced factory-direct at our own base in Zhengzhou, Henan - the Diamond Capital of China. Standard grain size range: W7 and coarser. Particle morphology: Ni-coated monocrystalline (electroless). Each batch is checked for particle size distribution before packing, and can be supplied in trial quantities for process validation.
Advantage
- Electroplated or electroless nickel layer, 30 percent or 56 percent weight gain
- Rough, spiky layer keys mechanically into the bond
- Tool life typically improves 20 to 35 percent against the uncoated grade
- Electroless (N) deposits uniformly in all directions for even holding force
- Resin-bond wheels, electroplated burrs, diamond wire and glass cutting tools
- Ships in 7 to 10 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
N Nickel-Coated Diamond (HDY-N) is monocrystalline diamond with a nickel layer applied either by electroplating or electroless deposition. Nickel coating works mechanically rather than chemically: the layer is deliberately rough and spiky, so the bond grips the particle instead of relying on surface adhesion.
The effect is measurable. Holding force improves, pull-out drops and tool life typically rises 20 to 35 percent against the same uncoated grade. Electroless nickel (the N grade) deposits evenly in all directions rather than only where the current reaches, so coating weight is more uniform across the batch.
Weight gain is specified as 30 percent or 56 percent, in both electroplated and electroless versions. Typical use is resin-bond wheels for carbide, glass and ceramic, electroplated diamond burrs and engraving tools, diamond wire, and grinding and cutting tools for plastics, silicon and glass. Supplied from W7 and coarser, with finer grades from W3 available on request.
Standard Grain Size Chart
Coated diamond is supplied from W7 and coarser. Below that the coating is a large share of the particle mass, so finer grades are quoted separately.
| GradeChinese standard | Size range (µm)International standard | Sieve no. / meshMesh no. | Coating route |
|---|---|---|---|
| Micron gradesW7 – W40Resin-bond wheels, diamond wire, electroplated burrs | |||
| W7 | 4–8 | 3,000 | Electroplated and electroless |
| W10 | 4–9 / 6–12 | 2,500 / 1,800 | Electroplated and electroless |
| W14 | 7–14 / 8–16 | 1,500 / 1,300 | Electroplated and electroless |
| W20 | 12–22 | 1,000 | Electroplated and electroless |
| W28 | 20–30 | 700 | Electroplated and electroless |
| W40 | 30–40 | 450 | Electroplated and electroless |
| Mesh gradesD46 – D213 (325# – 70#)Metal-bond saw segments, drills, electroplated tools | |||
| D46 | 325/400 | 325# | Electroplated and electroless |
| D54 | 270/325 | 270# | Electroplated and electroless |
| D64 | 230/270 | 230# | Electroplated and electroless |
| D76 | 200/230 | 200# | Electroplated and electroless |
| D91 | 170/200 | 170# | Electroplated and electroless |
| D107 | 140/170 | 140# | Electroplated and electroless |
| D126 | 120/140 | 120# | Electroplated and electroless |
| D151 | 100/120 | 100# | Electroplated and electroless |
| D180 | 80/100 | 80# | Electroplated and electroless |
| D213 | 70/80 | 70# | Electroplated and electroless |
Finer grades from W3 to W5 are available with electroless nickel on request. Coating weight gain, layer uniformity and the base diamond grade are confirmed against your bond system before production.
Nickel Coating Weight Gain
Nickel coating is specified by weight gain, and the two deposition routes land on different numbers for the same nominal gain. Electroless nickel (the N suffix) builds an even layer in all directions, so it adds more metal for the same specification than electroplating does.
| Coating typeDeposition route | Weight gainBy weight | 1 ct uncoated becomesCoated weight | Minimum orderPer coating batch |
|---|---|---|---|
| Standard nickel coating specificationsW7 and coarser | |||
| Electroplated nickel, 30% | 30% | 1.30 ct | 2,000 ct |
| Electroless nickel, 30%N | 30% (N) | 1.42 ct | 2,000 ct |
| Electroplated nickel, 56% | 56% | 1.66 ct | 2,000 ct |
| Electroless nickel, 56%N | 56% (N) | 2.27 ct | 2,000 ct |
Coating weight is quoted against the uncoated diamond weight, so a 56%N batch takes 2.27 ct of coated material to deliver 1 ct of diamond. Tell us the bond system and the target holding force and we will confirm whether 30% or 56% is the right specification. Finer than W7 is produced to order.
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.
Titanium Or Nickel Coating
The coating is chosen by the bond and the temperature the tool sees. Titanium protects the diamond from heat; nickel holds it in the bond mechanically.
| Coating | How it is applied | Weight gain | What it does | Typical tools |
|---|---|---|---|---|
| Titanium (Ti) | Dense titanium layer bonded to the particle surface | — | Isolates the diamond from oxidation and graphitisation during high-temperature sintering and reduces pull-out | Metal-bond stone tools: saw segments, blades and drills |
| Nickel, electroplated | Electroplated nickel layer | 30% (1.00 to 1.30) or 56% (1.00 to 1.66) | Spiky, rough layer that keys mechanically into the bond | Resin-bond wheels, electroplated burrs, diamond wire |
| Nickel, electroless (N) | Chemical nickel deposition | 30%N (1.00 to 1.42) or 56%N (1.00 to 2.27) | Uniform, non-directional layer for even holding force and better heat transfer | Same as above, with tighter coating control |
What To Include
Send the current product, particle size target and process problem. We will confirm the matching grade, sample route and packing option.