What Lach Diamond does

Lach Diamond Inc. (LACH DIAMOND INC.) is the US operating subsidiary of German family enterprise LACH DIAMANT (Jakob Lach GmbH & Co. KG), headquartered in Grand Rapids, Michigan since 1982. The company manufactures polycrystalline diamond (PCD) and cubic boron nitride (CBN) cutting tools, including turning inserts, milling cutters (cartridge, copy, end, monoblock), drills (hollow, spiral, step), dressing tools, and electroplated grinding tools, alongside universal sharpening machines such as the Dia-2200-mini and mini contour. Its technology platform rests on Electrical Discharge Grinding (EDG/spark erosion) — a method for machining PCD invented by Horst Lach in 1978 and patented — which enabled efficient production of rotating diamond tools and remains a structural differentiator.

The company serves industrial customers in automotive (primary), wind power, woodworking, electric motor manufacturing, electronics/PCB, printing, and aerospace verticals, addressing use cases from engine block and chassis machining to composite rotor blade processing and grinding wheel dressing. Distribution is direct enterprise field sales with technical consultation spanning need identification through production implementation; pricing is quote-based and not publicly disclosed. Revenue is generated primarily through hardware sales of custom-specified cutting tools and sharpening machines, supplemented historically by licensing of EDG technology to international partners.

The business is privately held by the Lach family across three generations, with Horst Lach serving as President/CEO and Annabelle Lach appointed Vice President in April 2024 alongside her continuing CMO role at the German parent. The US entity celebrated 40 years in 2022, coinciding with the parent company's centennial, and operates as a niche specialty manufacturer anchored by a patent portfolio and long-tenured application engineering rather than scale.

Name

Lach Diamond

Legal name

LACH DIAMOND INC.

Website

https://lach-diamond.com

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

11–50 employees

Short description

Lach Diamond Inc. is a US B2B manufacturer of PCD and CBN precision cutting tools, sharpening machines, and dressing equipment, serving automotive, aerospace, wind power, and woodworking industrial customers through direct enterprise field sales and custom-engineered solutions.

Ownership category

akta.pro rank

Product category

Precision Cutting Tools (PCD and CBN)

NAICS

Cutting Tool and Machine Tool Accessory Manufacturing (333515), Machine Tool Manufacturing (333517), Saw Blade and Handtool Manufacturing (332216)

SIC

Machine Tools, Metal Cutting Types (3541), Abrasive, Asbestos & Misc Nonmetallic Mineral Prods (3290)

akta.pro primary industry

Metal Cutting Tools, Tooling & Workholding (Cutters, Inserts, Chucks, Fixtures) (IMAHADAB)

akta.pro secondary industries

EDM & Electrochemical Machining (Wire/Sinker EDM, ECM) (IMAHADAF), Grinding, Honing & Superfinishing Equipment (IMAHADAE)

Keywords

• PCD cutting tools
• CBN cutting inserts
• Diamond tooling solutions
• Precision grinding wheels
• Industrial sharpening machines

Headquarters

HQ city

Grand Rapids

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Diamond and CBN Cutting Tools: Manufacturing and sale of PCD and CBN cutting tools including turning inserts, milling cutters, drills, saw blades, and dressing tools. Tools are sold with custom specifications for industrial applications with pricing based on complexity and materials. Service offerings include resharpening and re-tipping capabilities.
2. Grinding and Sharpening Machines: Production and sale of EDG (electrical discharge grinding) machines for sharpening and manufacturing PCD tools, including the Dia-2200-mini and mini-contour models.
3. Custom Solutions and Licensing: Development and licensing of proprietary technologies and custom tool designs. Historical licensing of EDG technology to international partners including Israel and Japan.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Lach Diamond manufactures premium polycrystalline diamond (PCD) and cubic boron nitride (CBN) precision cutting tools, including turning inserts, milling cutters, drills, dressing tools, and electroplated grinding tools, as well as EDG-based sharpening machines (Dia-2200-mini, mini contour). The company produces both standard catalog items and custom-tailored tooling solutions for high-volume industrial machining in automotive, aerospace, woodworking, wind power, electric motors, electronics, and printing. It also offers resharpening and re-tipping services for its PCD/CBN tools.

Product overview

Lach Diamond Inc. is a manufacturer of premium diamond and CBN (cubic boron nitride) cutting tools, offering what it claims is the only complete product portfolio worldwide covering turning, drilling, milling, and grinding tools. The company provides both standard PCD (polycrystalline diamond) and CBN tools as well as custom-tailored solutions primarily for automotive, aerospace, woodworking, wind power, and electronics industries. The product line centers on PCD cutting inserts including the patented IC-plus chip breaker for aluminum machining, CBN tools like CBN-DUO-power for hard steel turning, and a comprehensive range of PCD milling cutters (cartridge, copy, end mills, monoblock designs), drilling tools (hollow drills, spiral drills, step drills), and dressing/grinding solutions including Dia-Fliese-perfect dressing plates, precision diamond dressing rolls, and electroplated grinding tools. Supporting the tool portfolio are proprietary EDM-based sharpening machines including the Dia-2200-mini universal sharpening system and mini contour profiling machine, along with the dia-ToolNet database management system for tool data across machines. The company operates as the US subsidiary of German parent LACH DIAMANT (over 100 years old) with manufacturing and service in Grand Rapids, MI since 1982.

Differentiator

Problem solved

Functional benefit

Brands

• IC-plus: PCD cutting insert with world's best chip breaker for turning tough non-ferrous metals, internationally patented.
• dreborid
• dreborid-B
• CBN-DUO-power
• EDG (Electrical Discharge Grinding)
• Dia-Fliese-perfect
• Dia-2200-mini
• mini contour
• Dia-2200-mini

Products and services

• PCD Cutting Inserts Polycrystalline diamond cutting inserts for precision turning of non-ferrous metals, aluminum, and composites, offered in ISO-conforming geometries available ex-stock from Grand Rapids, MI, for industrial turning applications.
• IC-plus Chip Breaker Internationally patented PCD cutting insert with an active chip breaker geometry for process-reliable turning of low-silica aluminum alloys, lead-free copper, and brass, eliminating long-chip machine stoppages.
• CBN-DUO-power Two-tipped CBN cutting insert for hard turning of hardened high-alloy steels from 58 to 62 HRC, delivering double efficiency and tool life versus single-tipped CBN inserts.
• PCD Cartridge Milling Cutters Replaceable cartridge milling cutters tipped with polycrystalline diamond for high-precision face milling and profiling operations in production milling.
• PCD Copy Milling Cutters PCD copy milling cutters for complex contour machining in automotive and aerospace production applications.
• PCD End Mills Polycrystalline diamond end mills for high-speed milling of aluminum, composites, and wood materials with extended tool life.
• PCD Monoblock Milling Cutters Monoblock design PCD milling cutters with soldered cutting edges for maximum rigidity and precision in high-volume production milling.
• PCD Hollow Drills PCD-tipped hollow drills for delamination-free drilling with low cutting forces and minimal vibration, available in bore diameters from 30 to 150mm.
• PCD Spiral Drills Polycrystalline diamond spiral drills for precision drilling of aluminum, composites, and wood materials with extended service life.
• PCD Step Drills (Dreboform) PCD step drills for multi-diameter drilling operations in composite and non-ferrous materials.
• Dia-Fliese-perfect Dressing Plates Diamond dressing plates that imitate a natural diamond tip for repeatable dressing of conventional grinding wheels in mass production.
• Single and Multi-Point Diamond Dressers Natural diamond dressers including single-point, multi-point, grit dressers, and triangular dressers for dressing conventional and diamond/CBN grinding wheels.
• Precision Diamond Dressing Rolls HiTech rotary-dress diamond profile rolls for automated dressing of grinding wheels in series production, providing high repeatability for components like valves, gears, bearing tracks, and turbochargers.
• Electroplated Diamond and CBN Grinding Tools Single-layered electroplated grinding wheels, pins, and files with diamond or CBN grit embedded in nickel bond, including CBN precision grinding pins G-MX 500 for internal grinding of HSS and hardened steels.
• Contour Profiled Deep Feed Grinding System Deep feed grinding systems using metal-bond diamond and CBN grinding wheels with contour profiling technology for precision grinding applications.
• PCD Wear Protection Parts Polycrystalline diamond wear protection components for machine tools, including prisms, bearing shells, centre points, steady rest blocks, sliding blocks, work rest blades, and punching knives.
• Dia-2200-mini Universal Sharpening Machine Universal automatic spark erosion (EDG) sharpening machine for production and service of PCD tools. Supports routerbits, jointing cutters, profile tools, and saw blades up to 530mm diameter with multiple production capability.
• mini contour Profiling Machine Specialized profiling machine for metal-bond diamond and CBN grinding wheels based on the Dia-2200-mini platform, achieving grain protrusions up to 70% with a 0.1mm reprofiling removal rate.
• Wind Power PCD Tooling Solutions Specialized PCD tooling solutions for wind turbine manufacturing, including patented drills with internal exhaustion for dust extraction, PCD-tipped cutting saws, and monoblock face milling cutters for rotor blade processing of GRP and CFRP composites.
• Woodworking PCD Tooling Solutions Complete PCD tool portfolio for woodworking applications including panel sizing saw blades, hoggers, jointing cutters, edge trimming cutters, profile cutters, mitre saws, and through-feed processing tools for kitchen cabinet, flooring, and furniture manufacturers.
• drebojet PCD Mill-Dressing Rolls PCD mill-dressing roll that uses spark-erosion-produced cutting edges with chip chambers for profile milling/dressing of grinding wheels in series production, allowing higher removal rates than conventional dressing.
• Custom Tooling Solutions and Resharpening Services Custom-designed PCD and CBN tools with dimensions, geometries, and specifications per customer requirements, plus resharpening and re-tipping service for owned tools, for high-volume industrial machining customers.

Quantifiable outcome

• Tool life up to 350x longer than carbide tools
• +2 more outcomes

Named customers1 record

Segments7 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered notable, minor and core.

• HEIAN CorporationnotableStrategic or Co-development Partner · 1 September 1982Japanese machine manufacturer HEIAN collaborated with LACH from early 1980s for demonstration of diamond tools on numerically controlled routers. HEIAN secured LACH's assistance for demonstrating diamond tools on their machines at trade shows.
• WesflexminorChannel Partner/ Reseller/ Distributor · 15 July 1982US company representing HEIAN machines in America, interested in LACH diamond tool demonstrations for woodworking applications.
• Asahi Diamond (Japan)notableOEM/ Whitelabel/ Licensing Partner · 23 March 1982License and know-how contract with Japanese diamond tool manufacturer Asahi Diamond for production of PCD-tipped diamond mill-dressing rolls according to LACH patents.
• General Electric (GE Superabrasives)coreTechnology or Integration · 22 September 1981Foundational partnership initiated in 1981 for market launch of PCD tools in the USA. GE provided polycrystalline diamond materials (compax) and technical support for development of larger diamond cutting edges. Partnership enabled LACH to expand PCD tool applications and contributed to development of spark erosion technology.
• Israeli Start-up CompanynotableOEM/ Whitelabel/ Licensing Partner · 30 March 1981Multi-million know-how and license contract for production of electro-plated diamond needle files and PCD wood/plastic cutting tools using LACH EDG technology.

Scale indicators6 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Mapal: Mapal is a German family-owned precision tooling manufacturer specializing in PCD, CBN, and carbide tools for reaming, drilling, milling, and turning — closely matching LACH's family-owned heritage and focus on automotive precision machining.
• Walter Tools (Walter AG): Walter AG produces a comprehensive line of precision tooling including PCD and CBN inserts for turning, milling, drilling, and grooving — directly comparable to LACH's product scope with strong automotive and aerospace customer overlap.
• Iscar (IMC Group): Iscar, part of IMC Group, supplies carbide, ceramic, PCD, and CBN metal-cutting tools globally across turning, milling, drilling, and grooving — competing head-to-head with LACH in precision machining of automotive and industrial components.
• Sumitomo Electric Hardmetal: Sumitomo Electric Hardmetal manufactures CBN inserts (Sumiboron) and PCD tooling for hard turning and non-ferrous machining — directly comparable to LACH's dreborid-B and IC-plus product lines in automotive and industrial applications.
• OSG Corporation: OSG Corporation is a Japanese manufacturer of taps, drills, end mills, and PCD tooling for automotive, aerospace, and mold-making — directly comparable in product portfolio to LACH with strong presence in EV motor and aluminum machining.
• Mitsubishi Materials: Mitsubishi Materials' cutting-tools business produces a broad PCD/CBN insert range alongside carbide tooling for turning, milling, and drilling — directly competing with LACH, especially in automotive and aerospace applications.
• Kennametal: Kennametal manufactures PCD and CBN cutting tools, milling inserts, drills, and tooling solutions for automotive, aerospace, and general metalworking — directly overlapping with LACH's product portfolio and customer base.
• Ceratizit: Ceratizit (Plansee Group) produces PCD, CBN, and carbide cutting tools covering turning, milling, drilling, and grooving — competing with LACH across the same industrial and automotive customer base, with broader European market reach.
• Sandvik Coromant: Sandvik's tooling division is the global market leader in metal-cutting tools, including PCD and CBN inserts, milling cutters, drills, and tooling systems — directly competing with LACH across all four core operations and serving the same automotive and aerospace customers.

Emerging players

• Element Six: Element Six (De Beers Group) manufactures synthetic diamond and CBN superabrasive materials and tooling — comparable to LACH as an upstream/adjacent PCD supplier with deep materials expertise relevant to LACH's tool manufacturing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/lach-diamond-inc
• Xx.com/lachdiamant

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lach Diamond