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, the cutting parameters used and the utilized saw tools, OHLER circular cold sawing machines are able to convince.

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

VDepending 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 NIRO	K-630 HSS	K-630 KOMBI	K-630 HM	K-630 S
Power [kW]	7.5	7.5	15	22.5	22.5
Switching transmission	6 level				4 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 - 37	4 - 54	12 - 166	18 - 250	47 - 350
Saw blade diameter [mm]	500 - 710	500 - 710	500 - 710	500 - 710	500 - 710
max. workpiece dimensions
round [mm]	250	250	220	220	220
square [mm] [mm]	240	240	210	210	210
Dimension and weight
Length x width x height [mm]	860 x 1560 x 2140	860 x 1560 x 2140	860 x 1560 x 2140	860 x 1560 x 2140	860 x 1560 x 2140
Weight [kg]	3300	3300	3500	3500	3500

Build size 100

	K-1000 NIRO	K-1000 HSS	K-1000 KOMBI	K-1000 HM	K-1000 S
Power [kW]	11	15	37	37	37
Switching transmission	6 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 - 34	4 - 51	12 - 160	15 - 196	36 - 474
Saw blade diameter [mm]	800 - 1120	800 - 1120	800 - 1120 (1150)	800 - 1150	800 - 1120 (1150)
max. workpiece dimensions
round [mm]	400	400	350	350	350
square [mm] [mm]	385	385	330	330	330
Dimension and weight
Length x width x height [mm]	1260 x 2060 x 2705	1260 x 2060 x 2705	1260 x 2060 x 2805	1260 x 2060 x 2805	1260 x 2060 x 2805
Weight [kg]	6700	6700	7000	7000	7000

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.