What Onejoon does

Onejoon (ONEJOON GmbH) is a German-Korean industrial furnace and kiln manufacturer headquartered in Bovenden, Germany, operating as a wholly owned subsidiary of Korean parent ONEJOON Co. Ltd. since the January 2020 acquisition of Eisenmann Thermal Solutions. The company designs, engineers, and builds custom thermal processing equipment operating across the 100°C to 3,000°C temperature range, with five core kiln platforms (Rotary Kiln, Hybrid Kiln, Pusher Slab Kiln, Retort Kiln, Roller Hearth Kiln) configurable for continuous and discontinuous operations under controlled atmospheres including nitrogen, hydrogen, CO2, water vapor, and reactive gases. The company has delivered more than 1,000 plants to customers worldwide across its 125+ year operating history.

Onejoon serves six primary market verticals: Battery Materials (cathode active material including LFP and NMC; anode materials including natural/synthetic graphite and silicon-carbon composites); Powders & Advanced Materials (catalysts, pigments, nanomaterials, hard metals); Technical Ceramics (SOFC/SOEC fuel cells, thin-film ceramics, oxide ceramics); Heavy Clay Ceramics (bricks, tiles, including the world's largest electric kiln co-developed with Wienerberger); Blade Strips & Saw Bands (razor blades, scalpel blades, bimetal saw bands with PTFE coating capability); and Carbon Fiber & Felts (full PAN oxidation through graphitization lines).

The business model is project-based enterprise sales of custom-engineered equipment, supplemented by after-sales service contracts, spare parts supply, software/controls, reconstruction/modification work, and a 24/7 emergency service hotline. Specialized account managers are organized by industry vertical (battery materials, advanced materials, ceramics, carbon fiber, blade strips), and the company operates dedicated test centers in Germany and Korea supporting the productized L2P (Lab-to-Production) scaling program and CFD simulation services. Geographic footprint includes wholly owned subsidiaries in Germany, South Korea, China, Poland, and the USA, with the website supporting 16 languages.

Name

Onejoon

Legal name

ONEJOON GmbH

Website

https://onejoon.de

Company type

Private

Founded year

1896

Operating status

Operating

Headcount range

251–500 employees

Short description

Onejoon is a German-Korean industrial furnace manufacturer with 125+ years of experience designing custom kilns and heat treatment equipment operating from 100°C to 3,000°C for battery materials, ceramics, carbon fiber, and precision metal components globally.

Ownership category

akta.pro rank

Product category

Industrial Furnace Equipment

NAICS

Industrial Process Furnace and Oven Manufacturing (333994), Metal Heat Treating (332811)

SIC

Industrial Process Furnaces & Ovens (3567), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE)

akta.pro secondary industries

Heat Treatment & Thermal Processing Furnaces (Hardening, Annealing, Induction) (IMAHADAI), Boilers, Furnaces & Process Heating Equipment (IMAHAKAD), Refractory, Furnace & Kiln Maintenance Services (IMAIACAG), Industrial Electrified Kilns & Calcination Solutions (Cement/Lime/Glass Specific) (EUABAJAL)

Keywords

• Industrial kilns
• Industrial furnaces
• Heat treatment equipment
• Thermal processing systems
• Battery material production equipment

Headquarters

HQ city

Bovenden

HQ country

Germany

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Industrial Furnace Equipment Sales: ONEJOON designs, manufactures, and sells custom industrial furnaces and kilns. Each system is tailored to customer specifications with project-based pricing. Revenue derived from equipment supply, engineering, installation, and commissioning services for turnkey furnace plants.
2. After-sales Services: Ongoing revenue from maintenance contracts, spare parts supply, software and controls services, reconstruction and modifications, and energy balancing services. 24/7 emergency service hotline available.
3. Process Development and Consulting: ONEJOON offers process development services including CFD simulations, test center trials, and process optimization consulting. These services support customers from laboratory scale to industrial production.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

ONEJOON designs, engineers, manufactures, and commissions custom industrial kilns and furnaces operating between 100°C and 3,000°C for thermal processes such as calcination, sintering, carbonization, graphitization, oxidation, reduction, pyrolysis, debinding, coating, and tempering. Its five core kiln platforms — Rotary Kiln, Hybrid Kiln, Pusher Slab Kiln, Retort Kiln, and Roller Hearth Kiln — are configured as turnkey thermal production plants for industrial manufacturers of battery materials (cathode and anode), technical ceramics, heavy clay ceramics, carbon fiber, and blade strips/saw bands. The company also provides CFD simulation services, test center trials, and ongoing maintenance, spare parts, and controls services.

Product overview

ONEJOON is a German-Korean industrial furnace manufacturer with over 125 years of experience, providing high-performance kilns and heat treatment equipment across multiple market segments. The core product portfolio consists of five main kiln types: Rotary Kiln, Hybrid Kiln, Pusher Slab Kiln, Retort Kiln, and Roller Hearth Kiln. These are complemented by service modules including the L2P Program (Lab-to-Production) for scaling support, CFD Simulation Services, Test Center facilities, and Service/Maintenance offerings. The company serves diverse markets including Battery Materials (cathode and anode production), Powders & Advanced Materials, Technical Ceramics, Heavy Clay Ceramics, Blade Strips & Saw Bands (hardening, tempering, and PTFE coating), and Carbon Fiber & Felts production. ONEJOON's furnaces operate in temperature ranges from 100°C to 3,000°C and support various atmospheric conditions including air, inert gases, reactive gases, and vacuum environments.

Differentiator

Problem solved

Functional benefit

Products and services

• Rotary Kiln Continuous rotary drum furnaces for thermal treatment of powders and granulates, featuring patented sealing systems for superior atmosphere purity and control. Used for industrial powder heat treatment including metal powders, catalysts, pigments, and battery precursors.
• Hybrid Kiln
• Pusher Slab Kiln Continuous pusher plate furnace technology with maximum oven lengths over 40m, high temperature sintering up to 2000°C, available with ceramic or metallic muffles for standard, aggressive, and special atmospheres. Suited for technical ceramics and high-temperature processes.
• Retort Kiln
• Roller Hearth Kiln
• Battery Materials Production Equipment (CAM Calcination)
• Anode Material Production Equipment
• Powder Heat Treatment Equipment
• Technical Ceramics Production Equipment
• Heavy Clay Ceramics Production Equipment
• Blade Strip Hardening & Tempering Systems
• Bimetal Saw Band Hardening & Tempering Systems
• Blade PTFE Coating Systems
• Carbon Fiber Production Lines
• Oxidized PAN Production Equipment (Oxidation Ovens)
• L2P Program (Lab-to-Production)
• CFD Simulation Services
• Test Center Services
• Service, Maintenance & Spare Parts

Quantifiable outcome

• 45% cycle time reduction with continuous vs batch processing
• +3 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• SylvatexcoreStrategic or Co-development Partner · 10 August 2026Strategic partnership to accelerate commercial production of cost-competitive domestic lithium iron phosphate (LFP) cathode materials in the United States. The collaboration integrates Sylvatex's precursor-free manufacturing platform with OneJoon's commercial-scale equipment and engineering expertise to reduce scale-up risks and capital expenditure for domestic battery material manufacturing.
• ALO Center ABcoreStrategic or Co-development PartnerPartnership with Swedish company ALO Center AB for the supply of hardening and tempering furnace plants for bimetal saw bands. Combines ONEJOON's furnace expertise with ALO's 80+ years of experience in saw blade industry equipment. Together they supply 'the best hardening and tempering furnace plants for bimetal saw bands in the world.'

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Ipsen (now part of Bodycote / independent furnace operations): Ipsen designs and manufactures industrial heat treatment furnaces for aerospace, automotive, and energy applications. Closely comparable in custom-engineered vacuum and atmosphere furnace technology and B2B enterprise sales model.
• Inductotherm Group: Inductotherm supplies industrial thermal processing equipment including induction melting and heat treatment systems. Comparable in B2B industrial thermal solutions for metals and materials processing.
• Carbolite Gero: Carbolite Gero produces laboratory and industrial furnaces up to 3,000°C for materials research, technical ceramics, and advanced materials. Comparable in high-temperature process equipment and target customer base.
• Nabertherm: Nabertherm is a German manufacturer of industrial and laboratory furnaces and kilns across similar temperature ranges and end markets. Directly competes with ONEJOON in heat treatment, ceramics, and advanced materials furnace supply.
• Linn High Therm: Linn High Therm is a German manufacturer of industrial furnaces, kilns, and heating systems for ceramics, metallurgy, and research. Direct peer in custom high-temperature thermal process equipment.
• Nutec Bickley: Nutec Bickley designs and manufactures industrial heat treatment furnaces, kilns, and thermal systems for ceramics, metallurgy, and advanced materials. Direct peer in custom engineered high-temperature furnace solutions.
• Harrop Industries: Harrop Industries manufactures industrial kilns and furnaces for technical ceramics, electronics, and advanced materials. Direct peer with overlapping customer base in ceramic and powder processing markets.

Broad incumbents

• Tenova (TAKRAF/Electrolytic/Solid Waste): Tenova is a broad industrial solutions provider including thermal processing, pyroprocessing, and heat treatment for metals and minerals. Larger incumbent with overlapping capabilities in rotary kilns and industrial furnace systems.
• Andritz (Separation / Metals Forming): Andritz is a large diversified industrial equipment group offering thermal processing, drying, and separation solutions. Operates in adjacent but broader process equipment categories than ONEJOON's specialty furnace focus.

Emerging players

• Thermcraft: Thermcraft is a US-based manufacturer of industrial ovens, furnaces, and thermal processing equipment for laboratory and production use. Comparable in custom high-temperature furnace offerings but smaller scale than ONEJOON.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries5 records

Funding overview

Funding rounds1 record

Investors1 record

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 Onejoon