JUSTAR

JUSTAR
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JUSTAR

Product catalog summary
Overview
The JUNKER TOOLTEC series is renowned for its high-performance grinding machines used in cutting tool production. These machines are celebrated for their precision, economy, and reliability, and are capable of producing a variety of cutting tools such as taps, drills, mills, reamers, and saw blades. The series is noted for its innovative technical development and customized system solutions.
Machine Types
The series includes several specialized machines: Lean Selection speed, Lean Selection allround, QUICKPOINT, JUMINIMAT, FLUTEMAT, JUMAXIMAT, TAPOMAT, DRILLMAT, NAJ VII / NAJ VIIa, and JUSTAR, each tailored for specific grinding tasks.
Blank Grinding
Machines like Lean Selection speed and QUICKPOINT are optimized for efficient blank grinding, featuring high peripheral speed, programmable B axis, and minimal tooling work, ensuring consistent quality and production flexibility.
Drill Grinding
The DRILLMAT series is designed for grinding twist drills from blanks, ensuring precise concentricity and extended service life, with integrated loading systems to minimize downtime.
Cutting Tool Grinding
JUMINIMAT and JUMAXIMAT machines are used for grinding cutting tools such as reamers and mills, ensuring high precision and adherence to narrow tolerances.
Threaded Tool Grinding
Machines like JUMINIMAT and TAPOMAT are used for grinding threaded tools, offering high cutting speeds and excellent thread surfaces, with integrated loading systems and CNC controlled relief grinding.
Complete Grinding
The JUSTAR Grinding Center provides complete processing of a wide range of tools, featuring a grinding wheel changer and automatic dimensional correction for enhanced flexibility and productivity.
Tooth Grinding on Circular Sawblades
Machines like JUMAXIMAT IV and NAJ VII are used for grinding the peripheral toothing of circular saw blades, ensuring high-quality and precise tooth grinding finishes.
Technical Data
The document includes detailed technical specifications for each machine, such as workpiece diameter, clamping length, grinding length, drive capacity, and peripheral speed.
Machine Specifications
  • Lean Selection Speed: Max diameter 150 mm, max length 800 mm, 12 kW power, 140 m/s speed, uses CBN/diamond, 210°.
  • Lean Selection Allround: Max diameter 290 mm, max length 800 mm, 5 kW power, 45 m/s speed, uses Corundum/CBN/diamond, 240°.
  • QUICKPOINT 1000: Max diameter 50 mm, max length 150 mm, 12 kW power, 140 m/s speed, uses CBN/diamond/carbon, B axis.
  • QUICKPOINT 3000: Max diameter 150 mm, max length 500 mm, 24 kW power, 140 m/s speed, uses CBN/diamond/carbon, B axis.
  • JUMINIMAT: Tap diameter 1-8 mm, thread milling cutter max 12.7 mm, 3 kW power, 70 m/s speed, uses Corundum/CBN/diamond.
  • FLUTEMAT: Diameter 2-20 mm, manual loading max 740 mm, automatic loading 50-350 mm, 11 kW power, 80 m/s speed, uses Corundum/CBN/diamond.
  • TAPOMAT 1000: Diameter 0.8-8 mm, 5 kW power, 32 m/s speed, uses Corundum.
  • TAPOMAT 3000: Diameter 3-32 mm, 12 kW power, 50 m/s speed, uses Corundum.
  • DRILLMAT S: Diameter 2-10 mm, manual loading max 550 mm, automatic loading 40-305 mm, 11 kW power, 80 m/s speed, uses Corundum/diamond.
  • DRILLMAT L: Diameter 5-20 mm, manual loading max 500 mm, automatic loading 63-305 mm, 20 kW power, 80 m/s speed, uses Corundum/diamond.
  • JUMAXIMAT: Diameter 6-42 mm, manual loading max 700 mm, 20 kW power, 80 m/s speed, uses Corundum/CBN/diamond.
  • JUSTAR: Diameter 2-25.4 mm, 20 kW power, 140 m/s speed, uses Corundum/CBN/diamond.
  • JUMAXIMAT IV: Diameter 20-203 mm, 20 kW power, 80 m/s speed, uses Corundum/diamond.
  • NAJ VII: Diameter 100-550 mm, 30 kW power, 80 m/s speed, uses Corundum.
  • NAJ VIIa: Diameter 210-710 mm, 30 kW power, 80 m/s speed, uses Corundum.
Grinding Wheel Specifications
  • Number of grinding wheels: 2-4 depending on the machine.
  • Diameter range: 70-400 mm.
  • Bore diameter: 32-127 mm.
  • Material: HSS/carbide.
Contact Information
The document provides contact details for Erwin Junker's offices in Europe, Asia, and America, including addresses, phone numbers, and email addresses for each location.
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Catalog excerpts

JUSTAR-1

CUTTING TOOL PRODUCTION

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JUSTAR-2

BLANK GRINDING Lean Selection speed, Lean Selection allround QUICKPOINT 1000, QUICKPOINT 3000, QUICKPOINT Blank Your partner for a sharper edge THREADED TOOL GRINDING High precision, economy and reliability - the grinding machines of the high-performance JUNKER Flutes: JUMINIMAT, FLUTEMAT, JUMAXIMAT Thread and chamfer: TAPOMAT 1000, TAPOMAT 3000 TOOLTEC series are among the technological leaders in the field of cutting tool manufacturing. The most discerning customers use JUNKER TOOLTEC to produce taps, drills, mills, reamers and sinks, as well as saw blades and a variety of special cutting tools....

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JUSTAR-3

BLANK GRINDING L ean Selection speed External cylindrical grinding Lean Selection speed grinds tool blanks at truly impressive speeds. One or more high-performance grinding spindles mounted at the swivel-action QUICKPOINT grinding method wheelhead (B axis) work using both the plunge-cut and QUICKPOINT grinding methods. This feature Freely programmable, makes the grinding machine extremely flexible and steplessly adjustable B axis capable of implementing several grinding operations Workpiece driven between centers in a single clamping set-up. Ingeniously engineered automation Carbide step drill:...

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JUSTAR-4

BLANK GRINDING QUICKPOINT Blank External cylindrical grinding External cylindrical grinding directly from round bar stock, diameter 3 – 25.4 mm QUICKPOINT 1000: max. dia. 50 mm QUICKPOINT 3000: max. dia. 150 mm The QUICKPOINT grinding method, patented by JUNKER, ensures efficient blank grinding. With up to three high speed grinding spindles and a grinding contact area no bigger than a point, the QUICKPOINT grinds shoulders, tapers, chamfers and grooves in a single clamping set-up. Extremely low-wear CBN or diamond grinding wheels, just a few millimeters wide, are used. The QUICKPOINT Blank minimizes...

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JUSTAR-5

THREADED TOOL GRINDING JUMINIMAT Threaded tools Flute grinding dia. 1 – 12.7 mm The JUMINIMAT grinds the flutes of small threaded tools with up to four grinding wheels. The threaded tool is ground either unsupported or with tailstock Maximum dimensional stability support. If required, a steady can be used for Integrated dressing unit stabilization. The integrated loading system takes care Compact design of a high level of independent operation and can be Different tool cassettes possible swiveled to the side for retooling. Integrated loading system HSS tap: M1, spiral fluted Cycle time: < 50...

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JUSTAR-6

THREADED TOOL GRINDING Groove and chamfer grinding dia. 6 – 42 mm Thread and chamfer grinding dia. 3 – 32 mm (52 mm) In the JUMAXIMAT, the threaded tool is ground either Threaded tools The TAPOMAT 3000 also works with two grinding wheels. unsupported or with tailstock support. A steady can be used for stabilization. Requirement-based loading systems ensure a smooth production sequence. A CNC dressing unit creates all the profile shapes. The thread and chamfer are ground in a single clamping Automatic coolant pipe adjustment set-up. All chamfer shapes can be generated with a diamond dressing wheel....

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JUSTAR-7

TWIST DRILL GRINDING DRILLMAT Complete grinding of HSS twist drills DRILLMAT S: dia. 2 – 10 mm DRILLMAT L: dia. 5 – 20 mm The DRILLMAT grinds flutes, the face geometry and the back in a single clamping set-up. Stable bushing Strengths: operations, thus enabling maximum precision. Up to Face grinding prior to back grinding four corundum grinding wheels are mounted on the grinding spindle. With the DRILLMAT S, dressing is Rapid retooling possible simultaneously with the grinding and loading Twist drill grinding support ensures the necessary rigidity during grinding sequence. The cooling nozzle...

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JUSTAR-8

CUTTING TOOL GRINDING J UMINIMAT Complete grinding of cutting tools dia. 1 – 12.7 mm In a single clamping set-up, the JUMINIMAT grinds the flutes, end teeth and cutting relief from solid. The cutting tool is ground either unsupported or with tailstock support. If required, a swivel-in steady can be Integrated loading system Different tool cassettes possible Compact design Integrated CNC dressing unit Profile precision HSS shank cutter: dia. 6 mm, four cutting edges Cycle time: < 5 min Grinding task: Grinding the flutes, Cutting tools the end tooth and the body relief JUMAXIMAT Complete grinding...

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JUSTAR-9

COMPLETE GRINDING OF A COMPREHENSIVE TOOL SPECTRUM JUSTAR Complete grinding of all kinds of tools dia. 2 – 24.5 mm (51 mm) The JUSTAR Grinding Center is the perfect machine for complete processing of an extensive range of workpieces. It offers maximum flexibility with top productivity and practice-oriented programming. Automatic dimensional correction A high-performance grinding spindle ensures high- Robot-operated coolant nozzle tracking speed cutting, and is supported by robot-operated Grinding wheel changer (with up to 30 grinding wheels) cooling nozzle tracking. Thanks to a measurement system...

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JUSTAR-10

TOOTH GRINDING ON CIRCULAR SAWBLADES JUMAXIMAT IV Tooth grinding on circular sawblades dia. 20 – 203 mm NAJ VII / NAJ VIIa Tooth grinding on circular sawblades NAJ VII: dia. 100 – 550 mm NAJ VIIa: dia. 210 – 710 mm These special machines grind the peripheral toothing of circular saw blades in package clamping. All technical tooth profiles, with identical or non-identical tooth Grinding in package clamping heights, are ground from solid blanks. The oscillating Short cycle time longitudinal grinding process guarantees the Grinding of all tooth profiles with identical production of high-grade circular...

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TECHNICAL DATA Clamping/ workpiece length Grinding length Drive capacity Peripheral speed Swivel grinding spindle Number of grinding Diameter Bore diameter, Width per wheels grinding wheel grinding wheel grinding wheel Workpiece diameter Lean Selection speed Lean Selection allround Corundum/CBN/ diamond CBN/diamond/ carbon CBN/diamond/ carbon QUICKPOINT Blank Tap: dia. 1 – 8 mm Thread milling cutter: max.12.7 mm man. loading: max. 740 mm autom. loading: 50 – 350 mm Thread only: max. 180 mm, Thread + chamfer: max. 150 mm man. loading: max. 550 mm, autom. loading: 40 – 305 mm man. loading: max....

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.