Global Supply Chain
Diamond on the Grind: Two Chinese Toolmakers Feeding the Floor-Coating Boom
From Fujian’s stone-and-concrete tool belt to Hebei’s certified exporters, Quanzhou Sunny Superhard Tools and Shijiazhuang Corediam are putting PCD shoes and planetary grinding plates into the hands of epoxy crews worldwide.
Every polyaspartic garage floor starts the same way: dust, diamonds, and a planetary that refuses to forgive a soft bond. Before the flake broadcast and the glossy topcoat, contractors live or die on coating removal and surface prep — and that means diamond tooling. For EpoxyMagazine.com readers building international supply lists, two Chinese manufacturers keep showing up where aftermarket shoes meet major machine platforms: Quanzhou Sunny Superhard Tools Co., Ltd. in Fujian, and Shijiazhuang Corediam Tools Technology Co., Ltd. in Hebei.
This is a dual business profile grounded in what each company publishes — websites, product pages, and exhibition news — not invented quotes or phantom SKUs. Compatible-with language below means tooling marketed for popular grinder systems; it does not claim an official OEM partnership unless those brands say so.
Sunny Superhard Tools: Fujian specialty in PCD and planetary shoes
Tangxi Industrial Zone, Luojiang District, Quanzhou, Fujian 362013, China
Founded 1993 (company About / FAQ) · Factory footprint stated at 15,000 m²
sunnydiamondtools.com · sunnytools.biz
Sunny’s public story is longevity in China’s diamond-tool industrial corridor. The company dates itself to 1993 and positions a Quanzhou factory for OEM and ODM work — logo, color, and custom design offered for distributors and brand partners. For floor-coating contractors, the catalog that matters is the grinding line: metal-bond shoes and discs, bush hammers, and especially PCD coating-removal shoes and plates aimed at epoxy, paint, resin, and glue.
Product pages explicitly market tooling for platforms familiar on Western jobsites — HTC, Lavina, Husqvarna, ASL, Scanmaskin, Klindex-style grinders — including examples such as a Lavina quick-change PCD plate (published model SYF-P11, two half-round PCDs) and split PCD HTC shoes for coating removal. That is the EpoxyMagazine.com angle: a Fujian maker that speaks coating-strip language, not only stone fabrication.
Sunny markets internationally and invites global contractors and distributors. A country-by-country export table is not published on the About page, so we treat reach as “exports internationally” without inventing market-share claims. Internal QC language (PDCA / 7S) appears in company materials; a dedicated, independently verified ISO certificate page was not found in our review — so we do not assert ISO for Sunny.
On the trade-show trail, Sunny announced participation in the Xiamen International Stone Fair 2026 (Booth B3049, March 16–19, 2026, XICEC), showcasing wire saws, blades and segments, concrete grinding discs, bush hammers, and OEM/ODM capability — a useful signal that the floor-grinding line sits inside a broader stone-and-concrete diamond business still courting overseas buyers.
Corediam: Hebei exporter with ISO/EN credentials and a global booth calendar
No. 695 Tianshan Street, Hi-Tech Zone, Shijiazhuang, Hebei, China
Founding year: not stated on official About — third-party dates conflict; omitted here
corediamtools.com
If Sunny’s public identity leans Fujian specialty and PCD epoxy strip, Corediam’s published identity leans certified multi-line exporter. The company states an export network to more than 50 countries, naming regions that include North America, Europe, the Middle East, Southeast Asia, and South America. June 2025 news highlighted factory visits from customers in Iran, the Czech Republic, France, Egypt, and Kazakhstan — visit examples, not a complete market census.
On credentials, Corediam’s site states ISO 9001, ISO 14001, and production to the EU EN13236 standard, with additional references to SGS/BV on certification pages, plus claims of “national high-tech enterprise” status and 10+ patented technologies. Those are company-stated; contractors should still ask for current certificates when qualifying a supplier.
Floor-relevant catalog depth is real: diamond grinding shoes and plates for concrete grinding, surface prep, and coating removal — including Redi-lock, HTC, trapezoid, and round formats, PCD trapezoid and crushed PCD options, Lavina-style shoes, Contec/Airtec-style plates, and diamond cup wheels, alongside a broader construction line of laser-welded blades, core drills, wire, and polishing pads. OEM work for “many top industry brands” is claimed without naming those brands — we leave the claim as published, unnamed.
Recent booth activity is unusually concrete for a dual-profile piece: the Corediam team at BIG5 Saudi in Riyadh (February 2025), international customer hosting in June 2025, and a February 2026 announcement for Eisenwarenmesse 2026 in Cologne. For distributors building Asia sourcing trips, that calendar is a practical reason to put Corediam on the shortlist.
What coating contractors should notice
- Chemistry of the job: PCD plates for ripping epoxy and glue; metal-bond shoes for opening the slab; resin pads later in the polish path — both companies publish into that sequence.
- Machine interface: Aftermarket Redi-lock / HTC EZ-change / Lavina quick-change style tooling is how many crews keep grinders running without waiting on OEM-only shoes.
- Two sourcing personalities: Sunny as a long-running Quanzhou floor-tool specialist with explicit epoxy-removal products; Corediam as a Hebei exporter with stronger public ISO/EN and trade-show documentation.
- Diligence still required: bond hardness for your local concrete, segment life vs. price, warranty on PCD loss, and freight lead times matter more than brochure photography.
Why EpoxyMagazine.com is watching
International magazine readers — franchise operators, independent coating companies, and equipment dealers — are hunting the same invisible layer of the industry: reliable diamond that strips yesterday’s floor without chewing tomorrow’s budget. Sunny Superhard Tools and Corediam sit in that layer from different Chinese industrial cities, both marketing planetary-compatible grinding and coating-removal tooling into global channels.
If you are building a vendor map for EpoxyMagazine.com’s supply-chain coverage, start with their product pages, ask for current certificates and sample shoes for your machine plate, and — when the calendar lines up — meet them where they already go: Xiamen for Sunny’s stone-and-concrete showcase, Cologne or regional hardware fairs for Corediam’s export push. Good diamond suppliers usually look as sharp off the booth as they do on the catalog.