JUMAT - cylindrical grinding
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CYLINDRICAL GRINDING

VERSATILE IN EVERY REGARD Quality, productivity, availability – the JUMAT external and internal cylindrical grinding machine leaves nothing to be desired. Various sizes and a large number of wheelhead versions offer unrivaled versatility. Paired with the concentrated expertise of JUNKER, each machine is specially matched to the customer‘s requirements.

GRINDING PROCESS EXTERNAL AND INTERNAL GRINDING The cylindrical grinding machines of the JUMAT series can perform both OD and ID grinding in a single clamping set-up. CBN and diamond grinding wheels enable high-speed grinding, provide for high cutting performance and enable grinding of difficult materials. EXTERNAL CYLINDRICAL GRINDING Straight plunge-grinding (with wheel set) During external cylindrical grinding, the workpieces are clamped between tips or in a collet chuck. To increase productivity, grinding wheel sets are used for some applications. The JUMAT uses the straight and...

WORKPIECE SPECTRUM The cylindrical grinding machines of the JUMAT series grind the diameter, flat shoulders, grooves, cones and chamfers in individual or combined operations. The versatility of the JUMAT has proven itself in a broad range of industries. Typical workpieces include: • Shafts, such as gearshafts, rotor or camshafts • Injection pump parts, such as pump pinions or exhaust valves • Threaded parts, such as steering racks or ball screw nuts

HIGHLIGHTS AND SPECIAL SOLUTIONS HIGHLIGHTS • High dimensional accuracy thanks to various measuring systems • High dimensional accuracy thanks to various measuring systems • Long tool life through use of CBN or diamond grinding wheels • Versatility due to a large number of wheelhead versions • Versatility due to a large number of wheelhead versions • • • • Minimized undulations due to grinding wheel balancing on two levels Minimized undulations due to grinding wheel balancing on two levels Fast changeover through patented 3-point mounting interface Fast changeover through patented 3-point...

EQUIPMENT AND OPTIONS IN-PROCESS MEASURING SYSTEM A digital measuring head measures the bearing diameter and the concentricity in the process. The control system logs the measured values, calculates the correction data and compensates process influences due to temperature fluctuations or grinding wheel wear. WHEELHEAD VERSIONS The broad range of wheelhead versions provides for great flexibility. Up to three grinding spindles are mounted on each wheelhead. As a result, even complex workpieces requiring several grinding tasks can be ground in one machine and in a single clamping set-up....

CONTROL SYSTEM 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. AXIS DRIVE AND GUIDANCE With platforms 1 to 8, the wheelheads traverse along the Z axis. The mechanical direct drive uses...

LOADING SYSTEMS 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. MEASUREMENT 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...

FIELDS OF COMPETENCE TECHNOLOGY CENTERS The JUNKER Technology Centers in Nordrach, Germany and in Holice, Czech Republic offer a wide selection of grinding machines for demonstrations and customer-specific grinding tests. These facilities give potential buyers and customers the chance to be impressed by the technical and economic performance of JUNKER and ZEMA grinding machines and test them on their own workpieces. SERVICE The company group‘s growing sales and servicing network ensures satisfied customers worldwide. JUNKER Premium Service acts swiftly and with outstanding expertise...

TECHNICAL DATA Grinding length Clamping length Center height Grinding wheel diameter (max.) Peripheral diameter Available wheelhead versions Workpiece weight W x D x H mm (without peripherals) Weight WHEELHEAD VERSIONS JUNKER • JUMAT

JUMAT • JUNKER

EUROPE Erwin Junker Maschinenfabrik GmbH Junkerstraße 2 77787 Nordrach Germany Erwin Junker Grinding Technology a.s. Plant Holice Pardubická 332 534 13 Holice Czech Republic Erwin Junker Grinding Technology a.s. Russia Branch Office Prospekt Tolbukhina 17/65 150000 Yaroslavl Russian Federation Erwin Junker de Mexico, S. de R.L. de C.V. Blvd. Bernardo Quintana #7001 Torre 2, #1203 Centro Sur Querétaro Qro., C.P. 76079 Mexico Erwin Junker Máquinas Ltda. Centro Administrativo Rio Negro Edifício Jaçari - Bloco A 13° andar cj. 132/133 Alameda Rio Negro 585 CEP 06454-000 Alphaville – Barueri, São...