Erwin Junker Machinery, Inc.

2541 Technology Dr.
Ste. 410
Elgin, IL 60124 US

Company Overview

The JUNKER Group

The companies which make up the JUNKER Group develop, produce and sell precision grinding machines for the metalworking industry, as well as air filters for industrial air purification. A global workforce of 1400 employees is actively working to secure the success of the JUNKER, ZEMA and LTA brands.

JUNKER has been instrumental in shaping today's grinding industry with high-speed grinding machines and ground-breaking inventions since 1962. Today, JUNKER is the world market leader in the manufacturing of CBN grinding machines. Their fields of application range from crankshafts to screw taps. The Group's customers are located anywhere ultra-precise metal grinding is vital – predominantly in the automotive engineering and tool industries.

ZEMA, founded in 1953, employs a workforce of over 80 and produces CNC grinding machines with corundum grinding wheels. The traditional Brazilian company draws on ingenious machine concepts for grinding transmission, turbocharger and cardan shafts as well as grinding the flange and journal on crankshafts. Its customers come predominantly from the automotive engineering industry and its suppliers, as well as from tool building. ZEMA has been part of the JUNKER Group since February, 2015 and utilizes the Group's worldwide sales and service network accordingly.

LTA Lufttechnik GmbH is a technological leader in filtration solutions. The air flow specialists research, develop and manufacture filtration systems for industrial air purification.

A Message from Erwin Junker Machinery, Inc.

The JUNKER Group:  Your Partner for Precision

The JUNKER Group is a global leader in the market for high-speed CBN grinding machines.

Meet The JUNKER Group

An introduction to The JUNKER Group

As Seen In Modern Machine Shop

Erwin Junker Grindstar

Grinding Machine Replaces Turning for Difficult Materials
IMTS 2018: Erwin Junker’s Grindstar grinding machine replaces turning with dressing-free, high-speed, plunge-cut grinding.

Junker Group corundum grinding machine

Corundum Grinding Machines Have Different Specialties
Junker corundum grinding machines fulfill the requirements of series production for a wide range of different workpieces.

Kellenberger Varia

February 2016 Product Spotlight Slideshow: Grinding
This month’s Modern Equipment Review Spotlight focuses on grinding machines of various capacities.

Advances in steady rest and in-process measurement technologies enable large crankshafts to be ground complete in one setup.

Large-Part Grinding: Two Key Technologies
Developments in steady rest and in-process measurement technologies enable effective grinding of huge crankshafts.

Star SU NTG-4L tool and cutter grinder

February 2015 Product Spotlight Slideshow: Grinding
Click through this slideshow for a sampling of grinding equipment, ranging from hand tools and abrasives to complete grinding systems.

straight plunge-cut grinding

Faster Setup for Centerless Grinders
The new series of Jupiter centerless cylindrical grinding machines from Erwin Junker Machinery (Elgin, Illinois) addresses the limitations to applying this process to small- to medium-sized batches.

Junker all-round machine

Cylindrical Grinding Machine Features Three Spindles
Junker’s all-round machine series features a high-precision B axis with automatic stepless positioning for versatility, while three high-performance spindles enable ID and OD grinding operations.


When Does Hard Turn/Grind Make Sense?
Combining different operations on a single machine tool platform is an attractive and increasingly popular idea. It is in practice, however, not always a plug and play substitution. Optimizing distinct metalcutting operations into a single cycle takes planning and a good understanding of the pluses and minuses of each.

Gang tool carrier design

One Stop Milling, Drilling, Turning And Grinding
Many shops, in an effort to reduce the handling of workpieces and get takt times (time spent in the cut) as low as possible, are looking to streamline this traditional hurry-up-and-wait process scheme.

Junker's Quickpoint system

What Is Single Point OD Grinding?
Two enabling technologies -- superabrasive wheels and high precision servo control -- come together to provide a contour grinding process that resembles an OD turning operation. For many medium volume OD grinding applications, this method may be a means to consolidate several manufacturing steps into a single setup.

Product Categories of Erwin Junker Machinery, Inc.

Dust Collectors & Air Filtration
Grinding Machines, Centerless
Grinding Machines, Cylindrical OD
Grinding Machines, Disc, Single or Double
Grinding Machines, Internal Cylindrical
Grinding Machines, Profile
Grinding Machines, Thread
Grinding Machines, Tool, Cutter & Drill Point
Grinding Machines, Universal (ID/OD)
Superabrasive Machining Systems

Trade Names

Lean Selection allround
Lean Selection cam
Lean Selection speed