Development and production of high-precision high-speed grinding machines as well as filtration technology for industry.
Erwin Junker Maschinenfabrik GmbH (JUNKER Gruppe)
Nordrach · Achern · Mělník · Holice · Čtyřkoly · Středokluky · Shanghai · Brazil · India · Mexico · Russia · Turkey · USANew on Amplifa
Grinding technology and filtration from a single source
The JUNKER Group, headquartered in Nordrach (Black Forest), develops, produces and distributes high-precision grinding machines for metalworking as well as filtration systems of the LTA brand for industrial air purification. The company was founded in 1962 by Erwin Junker and, according to its own statements, is considered the world market leader in CBN grinding; over 80 patents document its development strength, including the QUICKPOINT peel-grinding technology invented in 1984. The machines cover processes such as cylindrical/non-circular, internal cylindrical, longitudinal, plunge, profile, face and thread grinding, and machine workpieces ranging from crankshafts and camshafts to rolling bearings and thread taps through to heavy wind-turbine gear shafts up to 5,000 mm in length and 5,000 kg. In addition to machines, JUNKER offers automation with gantry loaders, its own grinding spindles, software and digital services as well as worldwide 24/7 service. Customers come from the automotive and tool industries, aerospace, wind power and robotics; users include, for example, Saarstahl.
- Site
- Nordrach
- Processes
- Corundum grinding (GRINDSTAR profile grinding machine, prototype and small-series production), CBN grinding (world market leader according to own statement), Cylindrical/non-circular grinding, Internal cylindrical/internal non-circular grinding, Longitudinal grinding, Plunge and angled plunge grinding, Profile and face grinding, Surface and thread grinding
- Materials
- Metal (high-precision metalworking), Plastic, Carbide (hard metal), Corundum (abrasive), CBN (abrasive), Diamond (abrasive), CBN (cubic boron nitride), Steel / metal
- Certificates
- ISO 9001
- Founded
- 1962
- Employees
- over 1,100
- Industries
- Automotive industry, Tool industry, Aerospace, Wind power industry, Humanoid robotics, Tier 1–3 suppliers and OEMs
- 01
Consulting and concept development
- 02
In-house development and design of the machines
- 03
In-house production of grinding spindles
- 04
Assembly of the grinding machines on the modular Platform 3
- 05
Integrated automation (gantry loaders) and peripheral equipment
- 06
Commissioning, software and digital services
- 07
24/7 spare parts and service network worldwide
Materials and grinding processes
Corundum (abrasive)
Conventional corundum grinding, among other things with the GRINDSTAR profile grinding machine for prototype and small-series production.
CBN (cubic boron nitride)
High-speed grinding with CBN tools, the core business of the group, which according to its own statement is world market leader.
Diamond (abrasive)
Diamond grinding tools for high-precision high-speed machining.
Steel / metal
Main material of the ground workpieces such as crankshafts, camshafts, rolling rings and rolling bearings.
Carbide (hard metal)
Materials machinable with QUICKPOINT grinding, from plastic to carbide.
Locations of the JUNKER Group
Nordrach
DEHeadquarters, production and technology center
- Lot size
- Prototypes to large series
- Materials
- Metal (steel)
- GRINDSTAR profile grinding machine
- Platform 3 machine series
- In-house grinding spindle production
Mělník
CZProduction (Erwin Junker Grinding Technology a.s.)
Holice
CZProduction and Erwin Junker Technical Academy
Čtyřkoly
CZProduction
Středokluky
CZProduction
Achern
DELTA Lufttechnik GmbH – filtration systems and electrostatic air purification
- Electrostatic filter systems
- Central systems for shop-floor air purification
Typical workpieces and applications
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Corundum grinding (GRINDSTAR profile grinding machine, prototype and small-series production)Machining | – | – | – | Small series/prototypes | Metal (corundum grinding) |
| CBN grinding (world market leader according to own statement)Machining | – | – | – | – | Metal |
| Cylindrical/non-circular grindingMachining | – | max. 1,600 mm (clamping length/grinding | max. 250 kg (JUNICOR 3S/3L), max. 80 kg | – | Metal |
| Internal cylindrical/internal non-circular grindingMachining | – | – | – | – | Metal |
| Longitudinal grindingMachining | – | – | – | – | Metal |
| Plunge and angled plunge grindingMachining | – | – | – | – | Metal |
| Profile and face grindingMachining | – | – | – | – | Metal |
| Surface and thread grindingMachining | – | – | – | – | Metal |
| QUICKPOINT grinding / peel grindingMachining | – | – | – | – | Metal (almost any material from plastic to carbide |
| High-precision grinding of rolling bearings (aerospace)Machining | – | – | – | – | Bearing steel (not specified in detail) |
| Complete machining of rolling rings (Lean Selection shaft at Saarstahl)Machining | – | – | – | – | Steel (rolling rings Saarstahl) |
| Grinding of crankshafts (JUCRANK)Machining | – | – | – | – | Metal |
| Grinding of heavy gear shafts (wind power) up to 5,000 mm and 5,000 kg (KARGO)Machining | – | 5,000 mm | 5,000 kg | – | Metal |
| High-speed grinding with diamond grinding toolsMachining | – | – | – | – | Metal, Carbide (possible) |
| Electrostatic filtration / industrial air purification (LTA Lufttechnik GmbH)Other | – | – | – | – | – |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Profile grinding machine | JUNKER GRINDSTAR | – | – | – | Nordrach (group) |
| Grinding machine for rolling rings / shaft grinding machine | JUNKER Lean Selection shaft | – | – | – | – |
| High-speed grinding machine (corundum) | JUNKER JUNICOR 3S | – | Max. swing diameter 290 mm; max. center height 230 mm; max. clamping/grinding length 800 mm; | – | – |
| High-speed grinding machine (corundum) | JUNKER JUNICOR 3L | – | Max. swing diameter 450 mm; max. center height 230 mm; max. clamping/grinding length 800 mm; | – | – |
| High-speed grinding machine (CBN/diamond) | JUNKER JUMAT 3S | – | Max. swing diameter 450 mm; max. center height 230 mm; max. clamping/grinding length 1,600 mm; | – | – |
| High-speed grinding machine (CBN/diamond, camshafts) | JUNKER JUCAM 3S | – | Max. swing diameter 450 mm; max. center height 230 mm; max. clamping/grinding length 1,600 mm; | – | – |
| QUICKPOINT grinding machine / peel grinding machine | JUNKER QUICKPOINT 3S | – | Max. swing diameter 290 mm; max. center height 230 mm; max. clamping/grinding length 800 mm; | – | – |
| Crankshaft grinding machine | JUNKER JUCRANK 3S | – | Max. swing diameter 290 mm; max. center height 230 mm; max. clamping/grinding length 800 mm; | – | – |
| Grinding machine for heavy shafts | JUNKER KARGO | – | Shafts up to 5,000 mm in length and 5,000 kg | – | – |
| Industrial air filter / filtration system (central systems, retrofitting, first installation on | LTA (JUNKER Group) | – | – | – | Achern |
Additional services
Reference customers
Quality and precision
The Platform 3 machines achieve dimensional accuracy through thermal stability and high stiffness of the robust design; configurable guidance systems and drive variants cover different accuracy requirements.
| Evidence | Nordrach |
|---|---|
| ISO 9001 |
Company history
- 1962
Foundation of Erwin Junker Maschinen- und Apparatebau by Erwin Junker in Nordrach (Black Forest)
- 1977
First own sales locations in Germany and the USA
- 1980
Foundation of LTA Lufttechnik GmbH in Achern
- 1984
Invention of the QUICKPOINT grinding technology
- 1992
Acquisition of three Czech grinding machine manufacturers, formation of the Junker Group
- 1995
Integration of LTA Lufttechnik GmbH into the Junker Group; opening of the technology center in Nordrach
- 2003
Foundation of the branch in Shanghai
- 2007
Merger of the Czech locations into Erwin Junker Grinding Technology a.s. headquartered in Mělník
- 2009
Opening of a sales and service location in India
- 2011
Opening of a sales and service location in Brazil
- 2012
Opening of the branch in Russia
- 2014
Opening of the branch in Mexico
- 2015
ZEMA Zselics Ltda. (Brazil) joins the group; founding of the Erwin Junker Technical Academy in Holice
- 2016
Foundation of LTA Industrial Air Cleaning in the USA; establishment of the Fabrikant Erwin Junker Foundation
- 2017
Foundation of LTA Industrial Air Cleaning Systems s.r.o. in the Czech Republic
- 2018
approx. 1,500 employees at 14 locations
- 2024
Death of the founder Erwin Junker on 13 July 2024