Seven controlled stages — raw material, production, quality control, packaging, dispatch, transport and customs clearance. Every diamond saw blade, drill bit and hole saw we export passes through all seven before it leaves our gate.
A batch number is issued at material intake and follows the goods through to the bill of lading. That single thread is what lets us answer a quality question three years after delivery — with data, not a guess.
Nothing goes into the mixer on trust. Every incoming batch of diamond grit, metal bond powder and steel substrate is sampled, measured and logged against our incoming-inspection standard. A lot without a certificate, or outside tolerance, is rejected at the gate.
HPHT-grown monocrystalline grit, screened to a narrow mesh band and matched to the material you actually cut — granite, reinforced concrete, asphalt, porcelain tile or green concrete.
Cobalt, carbonyl iron, copper, tin and nickel blends with tungsten-carbide additions and porosity regulators. Chemistry is verified per lot, because the bond decides whether a segment glazes or keeps cutting.
Laser-cut, stress-relieved 65Mn and 75Cr1 cores for diamond blades, supplied across the full 100–600 mm diameter range. Every blank is checked for hardness, flatness and bore runout before it is accepted into stock.
Hardness of the diamond is a given — every supplier has the same crystals. What separates a blade that cuts 120 m of reinforced concrete from one that glazes at 40 m is the metal bond holding those crystals, and the porosity that lets the matrix wear back exactly fast enough to keep fresh diamond exposed.
So we treat the bond as a formulation, not a commodity. Freight-cost-driven substitution of cobalt with iron is exactly the corner we refuse to cut, and it is the first thing a customer notices when they compare our blade against a cheaper one on the same wall.
| Material | What we measure | Instrument | Acceptance |
|---|---|---|---|
| Diamond grit | Mesh size distribution, impact toughness, thermal stability after 1,100 °C | Ro-Tap sieve shaker, friability tester, stability furnace | ±3 % mesh tolerance; strength index ≥ 45 |
| Metal bond powder | Chemical composition, particle size D10 / D50 / D90, oxygen content | Spectrometer, laser particle sizer, LECO O/N analyser | Mill certificate required; O₂ within spec |
| Steel core / blank | Hardness, thickness, flatness, centre-bore runout | Rockwell tester, micrometre, dial gauge | 42–48 HRC; flatness ≤ 0.10 mm |
Pressing, sintering, laser welding, grinding, heat treatment and coating all happen in-house. Process parameters stay in our hands instead of a subcontractor's, and cycle data is logged per furnace load and per welding program — which is the only reason a QC report means anything later.
Steel cores arrive from the mill with rolling oil and an anti-rust film on them. They go straight through the washing line — degreased, rinsed and dried — before anything else touches them, so welding, grinding and painting all start from clean, bare steel.
Diamond grit and metal powders are ball-milled to a homogeneous mix, then granulated into a free-flowing granulate so a uniform matrix surrounds every crystal. Mixing ratio is recorded against the segment type — a batch is never "topped up" from another drum.
Hydraulic presses and CNC-machined moulds compact the granulate into segment geometry — straight, turbo, roof-type or corrugated. Green density is verified batch by batch, because a segment that is not dense when it is cold will never be dense when it is hot.
Segments are sintered in graphite moulds under vacuum or inert gas on a controlled ramp / soak / cooling curve — typically 700–900 °C with pressure applied to density. The cooling rate is part of the recipe: rush it and you buy micro-cracks that only show up in the field.
A focused fibre-laser beam fuses segment to steel core, creating a metallurgical bond rather than a glued joint — in practice, a joint stronger than the segment itself. Unlike brazing it puts very little heat into the core, so the blade does not warp and does not need re-tensioning afterwards.
Welded blades go back into the high-pressure furnace for a consolidation sinter. Under heat and pressure the segment bond densifies further and grips the diamond crystals tighter — which is what keeps the cutting edge sharp — while the steel core is hardened and stress-relieved so it stays flat at working temperature.
Cores are rolled to a controlled tension and the faces and sides ground flat, so the blade runs true at full RPM instead of wobbling the cut open. Axial runout is read on a dial gauge before the blade is allowed to move on.
Segments are ground to their final tooth profile — rake, clearance and gullet geometry per drawing — and the flutes between segments are opened so slurry and debris clear the cut. This is where a sintered blank becomes a cutting edge: sharpness is ground in, not baked in.
Blade bodies are spray-painted in the family colour and cured, sealing the steel against rust through storage, ocean transit and time on your customer's shelf. Colour is also functional: it identifies the application line at a glance.
Every blade is laser-marked with diameter, bore, maximum RPM, rotation direction and your part number — the last operation on the line, and the one that ties the physical blade back to its batch record.
Inspection is spread across the whole line rather than saved for the end, when it is too late to do anything except scrap the batch. Twelve checkpoints sit inside production, five guard final release — and failing any one of them stops the lot.
| Characteristic | Method | Release criterion |
|---|---|---|
| Segment hardness | Rockwell B on a polished segment face | Within ±5 HRB of the approved bond spec |
| Weld shear strength | Destructive shear on a sampled blade | No joint failure below the specified shear load |
| Axial runout (TIR) | Dial gauge, blade mounted on a test arbor | ≤ 0.05 mm for precision blades; ≤ 0.20 mm general purpose |
| Tooth profile & edge quality | Profile projector / toolmaker's microscope | Rake and clearance angles per drawing; edge sharp, no grinding burrs |
| Paint adhesion & marking | Cross-cut tape test; visual against the approved sample | No flaking after tape pull; marks complete and legible |
| Cutting performance | Bench cut on the intended material | Meets the reference cut-rate and life for that SKU |
Test blades are scrapped, not shipped. If you want the numbers for your own order rather than the specification, ask — the batch file travels with the shipment.
Steel tools rust, and a container crossing the Indian Ocean in July is a humid place. Our packing spec starts from that fact: every tool is dried, rust-inhibited and sealed before it is boxed, and every master carton is dimensioned to your pallet and your container rather than to ours.
Tools are degreased, dried and protected with vapour-phase inhibitor paper, a light oil dip, or a dry-film coating depending on the product family. What we manage is the humidity inside the transit pack, not just what sits on the surface.
Blister card, skin pack, colour box, display box or PVC pouch. Barcodes, multilingual text and warning pictograms are printed to your market's requirement — we proof the artwork with you before the first run, not after.
Individual pack → inner box → master carton, or a single-layer bulk carton if your warehouse prefers it. Board grade, dimensions and case marks are agreed before the first shipment and then kept identical on reorders.
Export pallets are heat-treated and ISPM 15 marked, cartons are stretch-wrapped, and corner boards are added for LCL consignments that will be handled more than once. Pallet height is kept to the container's usable clearance.
| Product family | Unit pack | Inner / master carton | Protection |
|---|---|---|---|
| Diamond saw blades | Blister card or colour box, 1 pc | 10–50 pc per master carton | VCI paper + cardboard divider |
| Drill bits | PVC pouch, skin pack or plastic tube | 50–200 pc per master carton | VCI paper, tip-protected |
| Hole saws | Colour box with pilot bit | 20–50 pc per master carton | Foam or board insert |
| Abrasive discs & cups | Shrink sleeve, 5–10 pc | 100–200 pc per master carton | Edge-protected, flat-stacked |
| Bulk / OEM | Poly bag per piece | Carton or pallet box, your spec | Per agreement |
Before we book a container we build a loading plan for your exact mix of cartons and confirm the cubic metres against your quote. You approve that plan together with the packing list; we load to it. If a pallet has to be re-stacked on the dock, you hear it from us the same day — not from your forwarder three weeks later.
Finished goods are picked against your order line by line, and any shortfall is flagged before booking rather than discovered at the loading bay. Mixed-SKU orders are staged by carton mark.
Cartons are palletised to the loading plan, weighed, and measured per pallet. Net and gross weights on the packing list come off this scale, not from a theoretical calculation.
We match the shipment to a 20'GP, 40'GP, 40'HQ or an LCL consolidation, then produce a top-view loading layout showing pallet positions and residual space. You get it as a PDF you can forward straight to your warehouse.
Container doors are photographed empty, during loading and fully loaded; the seal number is recorded and the seal photographed in place. That photo set travels with the shipping documents, so there is a shared record if anything is ever disputed in transit.
A typical mixed order of blister-carded blades, boxed hole saws and pouched drill bits loads with the heavy blade cartons low and forward, and the light retail cartons high and aft. Nothing is packed so tight that your warehouse needs a crowbar.
| Container | Internal dimensions | Usable volume | Typical payload | Best for |
|---|---|---|---|---|
| 20' GP | 5.90 × 2.35 × 2.39 m | ≈ 28 CBM | ≈ 21,000 kg | Single-family orders, first trial container |
| 40' GP | 12.03 × 2.35 × 2.39 m | ≈ 58 CBM | ≈ 26,000 kg | Mixed orders with heavy cartons |
| 40' HQ | 12.03 × 2.35 × 2.69 m | ≈ 68 CBM | ≈ 26,000 kg | Mixed or light retail-packed orders |
| LCL | Consolidated at forwarder | By cubic metre | — | Trial orders, mixed SKUs, low volume |
Our plant sits roughly 150 km from Ningbo-Zhoushan and 190 km from Shanghai, so we can take a late cut-off and still make the sailing. Sea, air, rail and express are all booked through forwarders we have shipped with for years — and we tell you the real transit window, not the one that wins the order.
| Mode | Best for | Typical transit | Notes |
|---|---|---|---|
| Sea freight — FCL | Full-container orders | 12–40 days port to port | Lowest cost per kg. Direct sailings from Ningbo and Shanghai to most hubs. |
| Sea freight — LCL | Trial orders, mixed SKUs | FCL transit + 5–10 days | Consolidated at the forwarder's warehouse; cartons must be pallet-friendly. |
| Air freight | Urgent restock, samples | 3–8 days door to door | Chargeable weight from 45 kg. Ex Hangzhou Xiaoshan or Shanghai Pudong. |
| Rail — China / Europe | Central & Eastern Europe | 18–22 days | A middle option between sea and air; capacity is booked early. |
| Express courier | Sample parcels, small spares | 3–6 days | DHL / FedEx / UPS. DDP available for samples. |
| Destination | Port of discharge | Typical transit |
|---|---|---|
| Japan | Tokyo · Yokohama · Osaka | 5–8 days |
| South Korea / Singapore | Busan · Singapore | 4–8 days |
| Middle East | Jebel Ali · Dammam | 18–25 days |
| Australia / New Zealand | Sydney · Melbourne · Auckland | 18–22 days |
| US West Coast | Los Angeles · Long Beach | 14–18 days |
| US East Coast | New York · Savannah · Houston | 30–35 days |
| North Europe | Rotterdam · Hamburg · Felixstowe | 30–35 days |
| Mediterranean | Genoa · Valencia · Piraeus | 28–34 days |
| South America | Santos · Buenos Aires · Callao | 32–40 days |
| Africa | Durban · Lagos · Mombasa | 25–35 days |
Transit times are indicative, exclude destination customs clearance, and shift with the sailing schedule and season. We confirm the actual schedule against your required-on-board date before booking, and send you the booking confirmation and vessel details in writing.
We export under our own licence and issue the full document set within two working days of the bill of lading. Where a destination needs a preferential certificate of origin, we apply for it ourselves rather than leaving your broker to chase us for it.
| Product family | HS code | Description |
|---|---|---|
| Diamond circular saw blades | 8202.3910 |
Circular saw blades with working part of natural or synthetic diamond, or cubic boron nitride |
| Circular saw blades, other | 8202.3990 |
Other circular saw blades including slitting or slotting blades |
| Drill bits (non-rock) | 8207.5090 |
Tools for drilling, working part of other materials — HSS twist, step and core drills |
| Diamond milling / grinding tools | 8207.7010 |
Tools for milling, with working part of natural or synthetic diamond or CBN |
| Diamond grinding wheels | 6804.21 |
Grinding wheels and the like of agglomerated synthetic or natural diamond |
| Hole saws & core bits | Per working part | Classified by the working part — diamond, carbide or bi-metal HSS edge |
These are our standard China export lines. The binding classification for your import is your own customs authority's decision — we confirm the code on the commercial invoice before shipment, and can supply a pre-classification note for your broker if you need one.
Quoted in USD and EUR, with the Incoterm written into the contract rather than settled by habit. Production lead time starts from the date we receive your deposit and approved artwork.
| Order type | Lead time | Notes |
|---|---|---|
| Stock items | 3–5 working days | Standard diameters and bores held in the Hangzhou warehouse. |
| Sample order | 5–7 working days | Sent by express at our cost for qualified buyers. |
| OEM / ODM branded order | 20–30 days | Counted from artwork approval, not from PO. |
| Custom formulation or new mould | 30–45 days | Includes mould fabrication and a pre-production sample for your sign-off. |
Fifteen minutes is enough. We walk a camera through the laser welding cell, the QC bench and your packed cartons on the day they load — before you commit to the order, not after.