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OHLER Circular Cold Sawing Machines

Circular cold sawing machines from OHLER have a long-standing tradition. Their typical design features are proven, and have therefore remained characteristic traits until today. Even with increased demands regarding the materials to be cut; advances in cutting parameters and saw blades developments, OHLER circular cold sawing machines are able to perform and are built with old school integrity.


Advantages of OHLER Circular cold sawing machines

Closed system

The frame of the machine is comprised of a stable base made of cast iron, two columns with a cross bar and the carriage which runs vertically between the cylindrical column guides. Saw blade and feed cylinder are thereby precisely in the center level of the machine. All cutting forces act against the fixed clamping spindle side, and are dispersed within the closed system.


Vibration damping

The heavy machine body made of cast iron also absorbs vibrations, just like the amply dimensioned helical bevel gearbox in combination with a worm gear.


Carriage guide

The cutting forces are absorbed by exceptionally large-surfaced carriage guides. During the sawing, they absorb the horizontally acting partial forces of the cutting pressure; the vertical cutting pressure is generated by two synchronized hydraulic cylinders which compensate the weight of the saw carriage. This ensures an extremely long service life of the guides.


Workpiece clamping

A centric material clamping ensures the shortest possible cutting paths and saw times. The in-feed and discharge clamping of the workpieces in conjunction with robust vertical guidance of the saw carriage produces low-ridges and rectangular sections

 

 


Cutting performance

Very high cutting performances can be achieved through the use of LENNARTZ carbide-tipped circular saw blades. Material up to a tensile strength of 1500 N/mm² can be cut.


Combination-machine HSS/HM

Depending on the requirements, the OHLER circular cold saw machine offers the unique option to utilize carbide-tipped circular saw blades and segmental circular saw blades. The machine can provide a high torque even at low cutting speeds through the 6-speed manual transmission and the resulting possible gear ratios. Through the use of a frequency inverter, it is possible to attain all possible cutting speeds between the transmission steps.


Designs of OHLER circular cold sawing machines

Build size 630

 K-630 NIROK-630 HSSK-630 KOMBIK-630 HMK-630 S
Power [kW]7.57.51522.522.5
Switching transmission6 level4 step
Cutting speeds with a saw blade diameter of 630mm [m/min]4 / 6 / 9 /
12 / 16 / 23
6 / 9 / 13 /
18 / 25 / 34
20 / 27 / 39 /
55 / 75 / 104
30 / 41 / 59 /
82 / 113 / 156
78 / 108 / 158 / 219
Cutting speeds with a saw blade diameter of 630mm with a controlled frequency inverter [m/min]3 - 374 - 5412 - 16618 - 25047 - 350
Saw blade diameter [mm]500 - 710500 - 710500 - 710500 - 710500 - 710
max. workpiece dimensions 
round [mm]250250220220220
square [mm] [mm]240240210210210
Dimension and weight 
Length x width x height [mm]860 x 1560 x 2140860 x 1560 x 2140860 x 1560 x 2140860 x 1560 x 2140860 x 1560 x 2140
Weight [kg]33003300350035003500

Build size 1000

 K-1000 NIROK-1000 HSSK-1000 KOMBIK-1000 HMK-1000 S
Power [kW]1115373737
Switching transmission6 level
Cutting speeds with a saw blade diameter of 1000mm [m/min]4 / 6 / 8 /
11 / 14 / 21
6 / 9 / 13 /
16 / 22 / 32
20 / 27 / 39 /
51 / 69 / 100
25 / 34 / 49 /
63 / 85 / 123
60 / 81 / 117 /
151 / 205 / 296
Cutting speeds with a saw blade diameter of 1000mm with a controlled frequency inverter [m/min]3 - 344 - 5112 - 16015 - 19636 - 474
Saw blade diameter [mm]800 - 1120800 - 1120800 - 1120 (1150)800 - 1150800 - 1120 (1150)
max. workpiece dimensions 
round [mm]400400350350350
square [mm] [mm]385385330330330
Dimension and weight 
Length x width x height [mm]1260 x 2060 x 27051260 x 2060 x 27051260 x 2060 x 28051260 x 2060 x 28051260 x 2060 x 2805
Weight [kg]67006700700070007000

Conversion of the OHLER segmenteal circular sawing machines for use of carbide-tipped circular saw blades

The conversion is performed while maintaining the machine housing and the large-scale column guides, and thus also ensures the decisive advantages of the OHLER cold circular saw machine for the utilization with carbide-tipped tools.

Such a modification essentially consists of:

  • An increase of the drive performance, while maintaining the input speed at the gearbox.
  • Increase of the output speed of the saw shaft through an alteration of the reduction ratio in the gearbox.
  • Installation of a frequency converter for the variable pre-selection of the required cutting speed between the six transmission switching steps. 
  • Attachment of vibration damping elements, as well as cooling, lubrication and chip removal systems.
  • Adjustment of the machine hydraulics to the requirements.
  • Expansion of the work-piece clamping for a cutting gap widening to protect the blades during the saw blade return.
  • Installation of a PLC controller (Siemens S7).

A tool breakage monitoring can be adapted.

Last but not least, this modification provides a significant price advantage compared to the new purchase of a machine with an absolutely comparable cutting performance.