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Kronos L 660 |
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Kronos L 660 - Pure power for large
workpieces
The Mikrosa Kronos L 660 CNC centreless grinding machine is suited
for processing large workpieces.
Specially designed and equipped for high performance and high
volume, this machine boasts a number a technical enhancements. It
brings immediate cost-cutting benefits for the production user,
e.g. a higher removal performance and even further reduction of
auxiliary processing and changeover times.
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The carriage systems for grinding and regulating spindles,
arranged on the machine bed and pivoting carriage, and equipped
with vibration-damped roller circulation guidance, are precise,
clearance- free and low-friction. Within the design of the guiding
system, much emphasis was placed on the effective seal of the
guidance's. The infeed of both carriages takes place by means of a
servo drive via a clearance-free pre-clamped recirculating ball
screw spindle. Standard built-in linear measuring systems control
the exact positioning of the infeed axes.
The Kronos L 660 is equipped with a fixed grinding gap, enabling
simple automation or chaining without compensating axis. This is
especially advantageous for the handling of long and heavy parts.
For plunge cut grinding and in particular for through-feed
grinding, dressing of the regulating wheel geometry takes place
with special Mikrosa software without having to mechanically
adjust the regulating wheel dresser. As a result, changeover and
adjustment times are shortened, and regulating wheel geometry is
exactly reproduced.
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Grinding Area |
Metric |
Imperial |
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Min. workpiece diameter: |
5 mm |
0.197" |
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Max. workpiece diameter: |
250 mm |
9.84" |
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Max. workpiece length: |
665 mm |
26.2" |
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Grinding Wheel |
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Max. diameter: |
660 mm |
26" |
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Max. width: |
660 mm |
26" |
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Bore dia.: |
304.8 mm |
12" |
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Regulating Wheel |
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Max. diameter: |
400 mm |
15.75" |
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Max. width: |
660 mm |
26" |
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Bore dia.: |
203.2 mm |
8" |
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Grinding Wheel Drive |
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Circumferential speed constant: |
yes |
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Circumferential speed m/sec: |
63 |
m/sec |
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CBN grinding circumferential
speed†: |
90 / 120 |
m/sec † |
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Drive output: |
60 kW / 100 kW |
80 hp / 134 hp |
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Regulating Wheel Drive |
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Speed range, infinite: |
5 - 300 |
rpm |
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Dressing speed: |
700 |
rpm |
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Drive output: |
12 kW |
16 hp |
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Dimensions |
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Set-up area required,
(foundation): |
3210 mm x 1460 mm |
10.5' x 4.8' |
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Total area (including switch
cabinet): |
6850 mm x 3300 mm |
22.5' x 10.8' |
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Maximum height: |
2320 mm |
7.6' |
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Machine weight: |
18,500 |
kg |
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† = option |
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Grinding wheel change |
Dresser |
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Characteristics:
- Grinding and regulating wheel widths up to 660 mm
- Simplified change of grinding and regulating wheels
- New drive technology for the grinding wheel and
regulating wheel spindle, in particular for application of high speed
technology with CBN grinding wheels (circumferential speed up to 120 m/s)
- Max. 100 kW drive output enables high removal rates
- With a dressing speed of the regulating wheel of up
to 700 RPM, the dressing time is short. The subsidiary times are reduced
drastically in this way.
- Extreme system rigidity, high thermal stability
- Full enclosure of the working area for a safe and
environmentally friendly operation
- Customer specific software for all requirements of
centreless grinding
- Extensive range of accessories
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Click Here to view or download the
Kronos machine range brochure
(in PDF format) |
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