Manufacturer of CBN and diamond tools: grinding, honing and dressing tools as well as PCD/PCBN cutting tools for series production.

EHWA Europe GmbH

Eschborn-Niederhöchstadt (DE) · Osan (KR) · Dongtan (KR) · Pyeongtaek (KR) · Seocheon (KR) · Weihai (CN) · Shanghai (CN) · Fujian (CN)New on Amplifa

1975Founded (Ehwa Diamond, Seoul)

2004EHWA Europe established with headquarters in Germany

3Tool families: grinding/honing, dressing, cutting

Ø 650 mmMax. grinding wheel diameter (process examples)

5Technical sales contacts in Europe

About EHWA Europe

EHWA Europe GmbH, founded in 2004, is the European sales company of the South Korean Ehwa Diamond Co., Ltd., which has been manufacturing CBN and diamond tools since 1975. The product range comprises three tool families: CBN and diamond grinding and honing tools (cylindrical, profile, plunge and double-disc grinding wheels, honing stones), dressing tools (diamond dressing rolls, top dressers, static single-grit, form and multi-grit dressers) as well as PCD, PCBN and diamond cutting tools for turning, milling, drilling and reaming. The tools are custom-designed to match the machine concept, workpiece geometry and process requirements, with bond and grit individually matched – from resin, ceramic and metal bonds to hybrid and electroplated bonds. Key applications include camshaft, crankshaft, bearing and CV joint grinding, tool and insert grinding, cylinder crankcase honing, brake disc machining, as well as wafer and glass processing. The European headquarters with technical sales is located in Eschborn near Frankfurt; production takes place at the EHWA Group sites in Korea, China, Thailand, Indonesia and the USA.

Site: Eschborn-Niederhöchstadt
Processes: CBN and diamond grinding tools (cylindrical, profile, plunge, double-disc grinding), Tool grinding (flute, profile and cylindrical grinding of drills, end mills)., Camshaft grinding (CBN profile grinding), Crankshaft grinding, Plunge grinding of transmission parts, Bearing grinding (OD, ID and raceway grinding; horseshoe face grinding), Grinding of cutting inserts (peripheral, clearance and face surfaces), Honing stones for cylinder block / connecting rod honing (roughing, finishing, fine
Materials: PCD (polycrystalline diamond), PCBN (CBN), Natural diamond, Monocrystalline diamond, CVD diamond, Carbide (HSS-E solid carbide), Cermet, 100Cr6 (bearing steel)
Certificates: ISO 9001, ISO 14001, OSA (Organisation for the Safety of Abrasives)
Founded: 1975
Industries: Automotive, Drives technology, Rolling bearings, Tool industry, Medical technology, Aerospace

01
Raw material selection: industrial diamond and CBN from renowned sources
02
Tool design tailored to machine, workpiece and process
03
Manufacture of the grinding, dressing and cutting tools (sintering,
04
Coating of cutting tools (TiN, TA, AC, EL, TNP)
05
Process verification from approved customer processes
06
Resharpening and re-coating service

Abrasives, bonds and cutting materials

CBN

CBN (cubic boron nitride)

Grit B46–B252 for grinding hardened and high-alloy steels, e.g. camshaft and bearing grinding.

Diamond (natural, mono, CVD, PCD)

Abrasive and cutting material for carbide, ceramics, glass, silicon, as well as PCD cutting tools for aluminium and composites.

VEWN

Ceramic bond

Shape-stable sintered bond for camshaft, crankshaft and bearing grinding with excellent dressability.

BA–BP / PAE

Resin bond (phenolic, polyimide)

High cutting performance and low grinding forces, among other things for tool and insert grinding.

MB–MX

Metal bond (bronze-based)

Very high wear resistance for honing stones, glass grinding and top dressers.

BX–BMX

Hybrid bond

Combination of metal and resin bond for high material removal rates and easy dressing in tool grinding.

Electroplated bond

Single-layer nickel bond with high grinding performance, for complex profiles and re-coating.

PKD/PCBN

PCD and PCBN inserts

Machining of aluminium, cast iron and hardened steel in series and large-scale production.

K20–K40

Carbide

Workpiece material when grinding cutting inserts with Ra 0.15–0.25 µm.

TiN/TA/AC/EL/TNP

Tool coatings

Coatings with 2300–3500 Hv for cast iron, hardened steel and bearing shells.

Locations

Eschborn-Niederhöchstadt

EHWA Europe headquarters and sales office

Osan

Ehwa Diamond headquarters and production

Dongtan

Research and development center

Pyeongtaek

Production site

Seocheon

Production site (since 1993)

Weihai

Production site (since 1997)

Shanghai

Production site (since 2002)

Fujian

Production site (since 1993)

Tools and components

**CBN/diamond grinding wheel**Ceramic/resin bond · Automotive / tool industry

Industries

AutomotiveDrives technologyRolling bearingsTool industryMedical technologyAerospaceOpticsSemiconductorsGlassSolar/LEDE-mobility

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
CBN and diamond grinding tools (cylindrical, profile, plunge, double-disc grinding)Surface	Ra 0.15 – 0.25 µm (process example).	up to Ø 650 mm (grinding wheel)	–	Series / large-scale series	CBN, Diamond, Resin bond, Ceramic bond (VEWN, VBTM), Metal bond, Hybrid bond
Tool grinding (flute, profile and cylindrical grinding of drills, end mills).Surface	±0.01 mm (flute width, process example) · Ra 0.4 – 0.6 µm	60 mm (tool length example) × Ø 75 – 400 mm (wheel)	–	Series	Solid carbide K30 – K40, HSS, PM steels, high-alloy tool steels, Diamond, CBN
Camshaft grinding (CBN profile grinding)Surface	–	Ø 650 mm (grinding wheel)	–	Series	Nodular cast iron (FCD), forged steel
Crankshaft grindingSurface	–	–	–	–	high-alloy quenched and tempered steels, cast materials with hardened surface zone
Plunge grinding of transmission partsSurface	–	Ø 350 mm	–	Large-scale series	Hardened steels
Bearing grinding (OD, ID and raceway grinding; horseshoe face grinding)Surface	–	up to Ø 650 mm	–	Series	100Cr6, high-alloy steel grades, nickel-based superalloys, non-ferrous metals, glass
Grinding of cutting inserts (peripheral, clearance and face surfaces)Surface	Ra 0.15 – 0.25 µm	Ø 75 – 400 mm, special dimensions on	–	Series / automated production lines	Carbide K20 – K40, Cermet, PCD/PCBN, Diamond, CBN
Honing stones for cylinder block / connecting rod honing (roughing, finishing, fineSurface	–	Cylinder block bore diameter 75 – × Connecting rod 40 – 55 mm	–	Series	Grey cast iron, CGI, Steel, PM materials, quenched and tempered steel
CBN grinding pins – seat and bore grinding of injector componentsSurface	–	Workpiece diameter 4 – 8 mm	–	Series	Hardened steel for diesel injection valves (> 60 HRC)
Honing and grinding of brake discs (CBN segments, ZAPEX-G, Mevious)Surface	–	–	–	–	Cast iron (friction ring), coated brake discs (TiC 250 µm, SUS 100 µm)
Brake pad grinding (BSL and electroplated wheels)Surface	–	–	–	–	Brake pad, friction surfaces
Flute and thread grindingSurface	–	–	–	–	Drills, end mills, CBN, Diamond
Glass edge grinding (metal bond M series)Surface	–	–	–	–	Automotive glass, appliance glass, optical glass, quartz, ceramics, stone, ferrites
Lapping and polishing of hard materialsSurface	–	–	–	–	hard materials, G45/G30/G15 grit
Turning with PCD/PCBN/CBN inserts (OD, ID, grooving/contouring)Cutting	–	–	–	Series / large-scale series	Ferrous materials, cast alloys, hardened steel, high-alloy steels, non-ferrous metals, aluminium alloys, copper alloys, Composites, Wood
Milling with PCD/PCBN cutting tools (cartridge milling cutters, monoblock milling cutters, endCutting	–	–	–	Series / large-scale series	Aluminium alloys (vc = 800 – 3,000 m/min), Aluminium alloy (cylinder heads), Cast iron (cylinder block), PCD/PCBN, Carbide
Drilling with PCD/PCBN tools (EDHHE, EDHDD, EDDS, EDTMS thread milling cutters)Cutting	–	–	–	–	Aluminium alloys, PCD, PCBN
Reaming (EDRS, EDRS + chip breaker, step reamer)Cutting	–	–	–	–	Aluminium alloys, PCD
Diamond dressing rolls (RR, RP, IP1, IP2, NP) and static dressers (single-grit, form, multi-grit)Surface	Tight tolerances in the few-µm range	Roll diameter approx. 120 – 200 mm	–	Series	Natural diamond, Monocrystal, CVD, PCD
Metal-bonded top dressers for ceramic bonds (20,000 – 30,000 dressing operations)Surface	–	–	–	–	Diamond, Metal bond
Custom products: OKD circular saws, support rulers, diamond probesCutting	–	–	–	–	PCD, Diamond
Wafer processing (back grinding, dicing, microblades, CMP pad conditioners, dry polishing)Surface	–	–	–	–	Silicon, SiC, Glass, Display
Diamond tools for glass, display, LED and solar (cutting, drilling, grinding, polishing)Surface	–	–	–	–	Glass, Ceramics, Silicon, SiC
Coating of cutting tools (TiN, TA, AC, EL, TNP)Surface	–	–	–	–	Hardness 2300 – 3500 Hv

1 Anlagen & Maschinen

Machine	Manufacturer / model	Quantity	Working area	Year built	Site
Insert grinding machine	Agathon 400 PENTA	–	–	–	Customer process (reference statement)

Additional services

Custom tool designTechnical consulting and process designProcess verification from approved customer processesResharpening and re-coating service for cutting toolsTool coatings (TiN, TA, AC, EL, TNP)Electroplated bond / re-coatingDownloads of technical catalogs and data sheets without registration

Reference customers

General Motors (Supplier of the Year 2010, 2011, 2012)Schaeffler AG (Preferred Supplier 2016, 2018)

Quality and certification

Production has been certified to ISO 9001 since 1993; ISO 14001 has applied since 2002 and OSA certification (Organisation for the Safety of Abrasives) since 2003. Process evidence and measurement data come from approved customer processes.

Evidence	Osan
ISO 9001
ISO 14001
OSA (Organisation for the Safety of Abrasives)