About Junker

Used Junker CBN Grinding Machines for Sale

Resell CNC is your Simple. Reliable. and Trusted.® source for used Junker CBN grinding machines — including the JUMAT external cylindrical grinders, JUCRANK crankshaft grinding systems, JUCAM camshaft and non-circular grinders, JUCENTER dual-station grinding machines, QUICKPOINT peel/point grinding machines, JUPITER cylindrical grinders, EJ-series external cylindrical grinders, Lean Selection versatile grinders, TITAN through-feed grinders, GRINDSTAR plunge-cut grinders, FLUTEMAT and JUMAXIMAT tool grinders, JUMINIMAT small-tool grinders, and ZEMA NUMERIKA cylindrical grinding machines.

Erwin Junker Maschinenfabrik GmbH was founded in 1962 by Erwin Junker in an old grain mill in the Kinzig Valley of Germany's Black Forest. The company is headquartered in Nordrach, near Offenburg, and is recognized as the world market leader in CBN (cubic boron nitride) high-speed grinding. A pivotal shift came in 1978 with the introduction of CBN high-speed grinding machines, and in 1984 Junker invented the QUICKPOINT peel grinding process, which enabled a variety of contours to be ground in a single clamping. In 2003, the JUCRANK became the first CBN machine for complete crankshaft machining in one setup, and in 2008 the JUCENTER combined two grinding stations under one hood. The Junker Group employs over 1,200 people across 11 global locations, holds 80+ patents, and operates production facilities in Germany and the Czech Republic. The group includes ZEMA (Brazilian cylindrical grinding, acquired 2015) and LTA Lufttechnik (industrial air filtration, since 1995). US sales and service operate through Erwin Junker Machinery Inc. in Elgin, Illinois.

Looking to sell your Junker? Resell CNC buys used Junker machines nationwide — any model, any generation, any condition. Free appraisal within 24 hours, competitive offers, and we handle all rigging and transportation. Call (844) 478-8181 or email sales@resellcnc.com.

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Junker Cylindrical, Crankshaft & Camshaft CBN Grinding

The JUMAT series is Junker's external cylindrical CBN grinding platform, available for individual or combined operations in straight or angular plunge-cut configurations. The JUMAT 3S (Platform 3, launched 2024) advances speed, accuracy, and energy efficiency. The JUCRANK is the first CBN machine for complete crankshaft machining (roughing, finishing, non-circular grinding) in a single clamping, handling crankshafts up to 4.5 meters for diesel power generation. The JUCAM provides CBN non-circular grinding for complete camshaft machining across all cam shapes. The JUCENTER combines two grinding stations under one hood for camshafts, crankshafts, and gear shafts with integrated loading gantry. The EJ series covers external cylindrical and plunge-cut grinding with an optional HSG (high-speed grinding) technology package.

Junker QUICKPOINT, Through-Feed, Tool Grinding & ZEMA

The QUICKPOINT uses patented peel/point grinding where the computer-controlled wheel follows a programmed contour, machining a variety of shapes in a single clamping from plastic to carbide. JUPITER combines cylindrical grinding with CBN for significant productivity advantages. The TITAN 500 delivers through-feed grinding with a wide CBN wheel for dressing-free, polish-quality finishing in continuous sequence. The GRINDSTAR replaces turning with dressing-free high-speed plunge-cut grinding for large production volumes. The Lean Selection offers versatile, easy-to-use CBN and diamond grinding for contract manufacturers and medium-sized shops. FLUTEMAT grinds flutes in HSS cutting tools, JUMAXIMAT handles complete tool grinding (6 to 32 mm), and JUMINIMAT grinds small cutting tools (1 to 8 mm). ZEMA NUMERIKA cylindrical grinders feature hydrostatic guideways for wear-free, high-accuracy series production of shafts up to 3.7 meters.


Founded	1962 by Erwin Junker in Nordrach, Black Forest, Germany; world market leader in CBN high-speed grinding
Headquarters	Nordrach (near Offenburg), Germany; 1,200+ employees, 11 global locations, 80+ patents
US Operations	Erwin Junker Machinery Inc., Elgin, Illinois (sales, service, applications support)
Group Brands	JUNKER (CBN grinding machines), ZEMA (cylindrical grinding, Brazil, acquired 2015), LTA Lufttechnik (industrial air filtration, since 1995)
Best Known For	CBN high-speed grinding (since 1978), QUICKPOINT peel grinding (1984), complete crankshaft grinding (JUCRANK, 2003), dual-station grinding (JUCENTER, 2008), Platform 3 (2024)
Popular Models	JUMAT (1S, 2S, 3S, 6S), JUCRANK, JUCAM, JUCENTER, QUICKPOINT, JUPITER, EJ, Lean Selection, TITAN 500, GRINDSTAR, FLUTEMAT, JUMAXIMAT, ZEMA NUMERIKA
Controls	Fanuc CNC with Erwin Junker Operator Panel (pictogram programming); Teleservice remote diagnostics
Industries Served	Automotive (crankshafts, camshafts, gear shafts, transmission), diesel power generation, tool manufacturing, aerospace, compressor, medical, general manufacturing

What to Look for When Buying a Used Junker

Verify the CBN grinding wheel, spindle, and dressing system. Junker machines are built around CBN and diamond abrasives. Confirm wheel condition, spindle runout, bearing noise, and thermal stability. On machines with dressable wheels, verify dressing system function and diamond dresser condition. On dressing-free platforms (TITAN, GRINDSTAR), confirm the CBN wheel is in spec and the wheel change mechanism operates. Test workpiece spindle (C-axis) and tailstock for clamping and concentricity.

Test the axis system, loading, and dual-station function. On JUCRANK, verify X/C-axis interpolation for non-circular grinding of pins and journals. On JUCAM, test non-circular interpolation across all cam shapes. On JUCENTER, confirm both stations operate independently and the transfer mechanism is reliable. On machines with integrated loading gantries, cycle the loader and verify blank pickup, part removal, and conveyor integration.

Check the Fanuc CNC, Junker Operator Panel, and Teleservice. Junker machines run Fanuc CNC with the Erwin Junker Operator Panel featuring pictogram-based programming. Confirm the control boots, grinding programs are accessible, and the interface is functional. On Lean Selection machines, verify simplified programming for quick changeover. Confirm Teleservice remote diagnostics and that parts are available through Erwin Junker Machinery in Elgin, Illinois.

Junker Cylindrical CBN Grinding

JUMAT Series (External Cylindrical)

The JUMAT series (JUMAT 1S, 2S, 3S, 6S and additional variants) is Junker's core external cylindrical CBN grinding platform for individual or combined operations in straight or angular plunge-cut configurations. The JUMAT 3S (Platform 3, launched 2024) delivers advances in speed, accuracy, and energy efficiency. JUMAT machines are workhorses in automotive, power generation, and general manufacturing for grinding shafts, journals, and bearing seats.

EJ Series, JUPITER & Lean Selection

The EJ series covers external cylindrical and plunge-cut grinding with an optional HSG technology package for high-speed grinding. JUPITER combines cylindrical grinding with CBN for significant productivity advantages in peerless cylindrical work. The Lean Selection is a versatile, easy-to-use grinder ideal for contract manufacturers, small suppliers, and medium companies, with CBN and diamond abrasives and minimal setup times.

Junker Crankshaft, Camshaft & Dual-Station

JUCRANK (Crankshaft Complete Machining)

The JUCRANK is the first CBN machine for complete crankshaft machining in a single clamping, covering roughing, finishing, and non-circular grinding of all bearings, mains, and pins. Extended to 4.5 meters for diesel power generation, the JUCRANK grinds with interpolation and oscillation using a single CBN wheel, eliminating multiple machines and expensive measuring equipment.

JUCAM (Camshaft & Non-Circular) & JUCENTER (Dual-Station)

The JUCAM provides CBN non-circular grinding for camshafts, cam pieces, and individual cams across all cam shapes. Bearings and flat shoulders are ground in a single clamping. The JUCENTER combines two stations under one hood for camshafts, crankshafts, or gear shafts with an integrated loading gantry. Wheelhead versions can be combined for workpiece-specific configurations.

Junker QUICKPOINT, Through-Feed & Tool Grinding

QUICKPOINT, TITAN & GRINDSTAR

The QUICKPOINT uses patented peel/point grinding where the CNC-controlled wheel follows a programmed contour with pinpoint accuracy, machining from plastic to carbide in a single clamping. The TITAN 500 delivers through-feed grinding with a wide CBN wheel for dressing-free, polish-quality finishing in continuous sequence. The GRINDSTAR replaces turning with dressing-free high-speed plunge-cut grinding for large production volumes.

FLUTEMAT, JUMAXIMAT, JUMINIMAT & ZEMA NUMERIKA

The FLUTEMAT grinds straight and spiral flutes in HSS cutting tools. The JUMAXIMAT handles complete cutting tool grinding (6 to 32 mm, HSS or carbide). The JUMINIMAT grinds small tools (1 to 8 mm) with an integrated loading system. The ZEMA NUMERIKA cylindrical grinder features hydrostatic guideways for wear-free, high-accuracy series production of shafts up to 3.7 meters.

How to Sell Your Used Junker

Junker machines hold strong resale value due to the brand's world market leadership in CBN high-speed grinding, the massive automotive installed base (awards from VW, Bosch, GM, Geely), and ongoing support through Erwin Junker Machinery in Elgin, Illinois. Low-hour JUMAT, JUCRANK, JUCAM, JUCENTER, and QUICKPOINT with current Fanuc controls are in particularly high demand.

Resell CNC buys used Junker machines, every model and generation, nationwide.

Contact us at (844) 478-8181 or sales@resellcnc.com.
Free appraisal within 24 hours, no obligation.
Accept the offer and we handle rigging, transport, and logistics.

Frequently Asked Questions About Used Junker Machines

Are used Junker grinding machines reliable?

Yes. Junker has built CBN high-speed grinding machines in Germany since 1962 and is the world market leader in CBN grinding. The company holds 80+ patents and has received quality awards from VW, Bosch, SAIC General Motors, and Geely. Parts and service are supported through Erwin Junker Machinery in Elgin, Illinois, with Teleservice remote diagnostics.

What is CBN high-speed grinding?

CBN (cubic boron nitride) is an extremely hard abrasive that enables grinding at high speeds with long wheel life and consistent quality. Junker pioneered CBN high-speed grinding in 1978. CBN wheels maintain form far longer than conventional abrasives, reducing dressing frequency (or eliminating it on TITAN and GRINDSTAR) and delivering superior surface finish with shorter cycle times.

What should I inspect before buying a used Junker?

Verify CBN/diamond wheel condition, grinding spindle runout and bearings, dressing system (where applicable), workpiece spindle and tailstock, axis interpolation on non-circular machines (JUCAM, JUCRANK), loading gantry on JUCENTER, Fanuc CNC and Junker Operator Panel state, Teleservice connectivity, and coolant/filtration system.

Which Junker models hold their value best?

JUMAT cylindrical grinders, JUCRANK crankshaft machines, JUCAM camshaft grinders, JUCENTER dual-station, and QUICKPOINT peel grinders hold the strongest residual values, driven by automotive and power generation demand. Call (844) 478-8181 for valuations.

Does Resell CNC offer financing on used Junker machines?

Yes. Resell CNC offers flexible financing options. Call (844) 478-8181 for terms.

How do I sell my used Junker?

Call (844) 478-8181 or email sales@resellcnc.com. We buy every Junker and ZEMA model nationwide. Free 24-hour appraisal.