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Junker Jupiter Schleifmaschine

JUCENTRIC - Cylindrical grinding machines

Center-type cylindrical grinding

The JUCENTRIC 500 is characterized by extremely short cycle times and outstanding accuracy. The clamping set-up between centers retains the relation to the centerline when grinding shafts and pipes. At the same time, the support rail and regulating wheel guarantee perfect support.


  • Relation to centerline with clamping set-up between centers
  • High dimensional accuracy thanks to support by regulating wheel and support rail with patented CNC height adjustment
  • Shortest cycle times through simultaneous grinding of all diameters
  • Minimized undulations with grinding wheel balancing on two planes
  • Extremely low running noise due to grinding spindle with direct drive

Grinding process descriptions

The workpiece is positioned and clamped between centers. Grinding is carried out while clamped; the CNC-controlled support rail, the regulating wheel and the grinding wheel are evenly readjusted until the finished dimension is reached. This unique, ingenious procedure is currently patent pending.
Driving is carried out via a driver on the C-axis of the workhead. Upon the completion of grinding, the grinding gap opens and the workpiece is removed.

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Technical data: JUCENTRIC 500

WxDxH mm (without peripherals)
4465 x 2770 x 2340
18000 kg

Equipment and Options


The machine bed made of mineral cast provides impressive damping behavior and torsional rigidity. The temperature stability allows fluctuations in the ambient temperature to be compensated with a minimum of effort, ensuring a high level of dimensional stability throughout the whole day.


JUNKER offers both internal and external loading systems for all its machine series, depending on customer and workpiece requirements. The loading systems can be combined with different infeed and discharge systems such as conveyor belts or custom tailored systems.


The measurement systems are also individually adjusted to the various workpieces and customer specifications. The measurement processes entail evaluating the recorded measured values and utilizing them for measurement correction in line with the prepared measurement strategy. A grinding wheel measuring system to determine the diameter, axial position and width of the grinding wheel completes the wide range of systems on offer.


Grinding wheel dressing is CNC controlled. A driven diamond dressing wheel or a workpiece-dependent diamond profile roller can be used. Dressing takes place manually or using an automatic dressing program with grinding wheel compensation.


Depending on the application, the abrasive CBN or diamond is used. The basic bodies of the grinding wheels comprise steel or carbon. In conjunction with CBN, it can make sense to use a carbon base body: It is light, has vibration-damping properties and remains dimensionally stable even at high speeds.


The Erwin Junker Operator Panel was specifically developed to control grinding machines. All machine components are controlled using the operator panel – irrespective of the series and the used control system. The identical structure, intuitive menu guidance and visualization of the workpiece geometry make for extreme user convenience and flexibility in operation. Programming takes place directly using the operator panel or an external programming tool.


In case of an fire, the machine interior is automatically hermetically sealed, suffocating a fire before it has a chance to spread. If required, extinguishers (CO² or water mist systems) and exhaust air purification systems can be additionally installed. A competent partner for fire protection and filtration solution solutions is LTA Lufttechnik GmbH, which also belongs to the JUNKER Group and which researches, develops and produces filtration systems for industrial air purification.

The Filtration systems


  • Axle
  • Starter shaft
  • Drive shaft
  • Countershaft
  • Bolt
  • Bushing
  • Excentric shaft
  • Gear shaft
  • Piston pin
  • Piston ring
  • Motor shaft
  • Pump piston
  • Pump pinion
  • Pinion shaft
  • Pipe
  • Roller Bearings
  • Rotor
  • Worm wheel
  • Worm shaft
  • Spindle
  • Rod
  • Stator shaft
  • Stud
  • Turbine shaft
  • Cylinder
  • Rolling element
  • Shaft
  • Tool holder
  • Tool Blank
  • Gearwheel
  • Gear rod
  • Spigot
  • Cylinder rollers

Product Brochures JUCENTRIC

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