Bomar Ergonomic 340.278 DG

A gravity bandsaw with a robust cast-iron arm and 27 mm high saw band. The machine is equipped with a large rotary table, which is a good basis for processing short pieces of material.

Table synchronously rotated with the arm and so there is no initial cut of the belt to the underlying surface.

The excellent output of the machine and long lifetime of the band result from these features: a saw band precision guide, an arm joint laid in preloaded tapered bearings, and synchronous running brush for chips removal.

Band downfeed is ensured by the arm’s self-Váha. The descending speed is regulated by a hydraulic cylinder with an overflow valve.

Saw arm is after cutting the lifted by hand. The machine offers two-sided angle cuts. The basic version of the machine is equipped with a frequency converter, which provides infinitely variable belt speed ranges from 20 m/min. to 120 m/min.

This significantly increases blade life and productivity of the machine.

Key features

  • Robust cast-iron arm
  • Hardmetal band precision guide
  • Quick-action vice lever
  • Worm gearbox with industrial motor
SKU: 340.278DG Categories: , ,


Cutting parameters

278 340×100 275
45°R 260 230×100 230
60°R 155 145×100 115
45°L 205 220×100 180

Technical specification

Working mode: manual
Machine type: Horizontal bandsaw
Cut: Mitre cut
Mitre cuts range: -45° – 60°
Drive: 1,5 kW, 3×400 V/ 50 Hz
Saw band speed: 20 – 120 m/min.
Saw band dimensions: 3 125×25(27)x0,9 mm
Material loading height:  760 mm
Shortest remainder length: 20 mm
Smallest sawing diameter: Ø 5 mm

Standard Equipment

  • Frame is a robust grey cast iron casting
  • Automatic switch-off of the band after finishing the cut.
  • Automatic switch-off of the machine in case of slack or broken saw band.
  • Hard Metal guidance of the saw band ensures the accuracy of the cut.
  • Both-sided angle cuts in the range of 45° left and 60° right.
  • Ergonomic construction of the machine with easy control and working height 760 mm.
  • Easy manipulation with swarf via the tank with drainage sieve.
  • Complete cooling equipment located in the base of the machine.
  • Wide range of accessories.
  • Powerful and reliable saw band drive motor 1,5 kW
  • Machine design in accordance with the applicable CE standards and safety regulations

Machine base
The saw is constructed on a robust base in a height convenient for easy material handling. The construction of this base was developed as to absorb vibrations in the broadest possible range, thus increasing the life expectation of the saw band.

Saw frame
The frame is a compact grey cast iron casting and serves for exact guiding of the saw band and efficient absorption of machine vibrations.

Frame diving into the cut
Frame diving speed into the cut is controlled by a hydraulic throttling valve and its regulation is located directly on the control panel.

Frame embedding
The band saw frame is embedded in a pre-stressed axial-radial bearing installed on an extended turning console.

Turning console
Saw frame is located on the extended console in axial-radial bearing. The console is a part of turning table. The main advantage is that when the material is cut under various angles, the saw band cuts always into the same position of turning console and the laying area of the table is not cut.

Saw band
The saw band is accurately guided by means of hard metal and bearings located in two guiding cubicles. One guiding cubicle is fixed and the other is adjustable. The guiding ledge carrying the adjustable cubicle provides for setting the minimum distance between material and the band guides.

Saw band drive
The saw band drive is a powerful 1,5 kW engine with a gear providing for speed changes by means of a switch located on the control panel.

Saw band speed
Saw band speed can be controlled directly from the control panel placed on the front side of the machine in a range of 20-120 m/min.

Saw band tension
The saw band tensioning is manual. A limit switch on the frame monitors the saw band tension and saw band defects, e.g. rupture, and immediately switches off the saw band drive in case of a defect.

Saw band cleaning
Saw band cleaning is performed by a steel brush securing smooth withdrawal of swarf from the saw band, thus preventing swarf penetration into the machine frame space and between the saw band and the wheels

The cooling equipment is a standard part of the machine. Cooling emulsion supply can be regulated by taps on guiding cubicles attached to supply hoses. The cooling emulsion is pumped directly from the machine base, where a 10 litre container is installed. For cutting of profiles and tubes the saw band can also be equipped with the optional Micronizer, that sprays oil onto the saw band and thus prevents leakage of the cooling emulsion outside of the band saw. This equipment belongs to optional accessories.

Angle cutting range
The machine can be smoothly turned in the range of -45° and +60° both-sided directly from its front side.

Angle cut adjustment
Angle cuts can be adjusted easily directly from the operator’s position at the machine. The machine is located on a turning console equipped with a legible angle scale. The frame has to be turned manually.

Material clamping
The clamping of material is enabled by manual clamping vice that can be side adjustable in dependence on the angle of cut material. For the cutting angle lower than 0° the vice is on the right side, for the cutting angle 0° or higher the vice is on the left side.

Other accessories
As another optional accessory it is possible to connect a conveyor on the material input or output. Connection of conveyor and saw is realised via connection segments and mounting adapters in dependence on angle cuts. Connection segments and mounting adapters are stated in the optional accessories price quotation. The conveyor on the input side can be equipped with fixed or adjustable vertical rollers that keep the material in parallel with vice jaws and prevent the material from falling down of the conveyor. In case vertical rollers are not used, it is possible to prevent material from falling by mounting safety backstops. Length stop with manual, digital on NC admeasurement can be mounted on the output side.

All control elements are located on the control panel, which can be found on the front side of the machine.

Course of working process
The working cycle is manual, i.e. the material has to be located on the working table, manually clamped into the vice and after pressing the START button, the band engine starts. Frame diving speed into the cut is regulated by a hydraulic throttling valve. After completing the cut, the frame remains in its lower position and the band driving engine switches off. The frame has to be lifted manually.

Additional information


Manual DG, Hydraulic Semi-automatic DGH