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Portable gas-cutting machine Smena-2M is designed for oxygen cutting of steel sheets and plates. This economical and easy to operate cutting machine is best suited for straight line, circular and bevel cutting.

Depending on fuel gas used the machine design could be of two versions differing in cutter type: for use of acetylene and for use of gases substituting acetylene.

• straight-line separation cutting with one two cutters;


• straight-line bevel cutting;


• curve cutting to marking-out in manual transverse movement of the cutter;


• cutting-out of circular parts with one or two cutters;


• scarfing of end faces of plates by means of a special fixture;


• bevel cutting by directing the mashine along the plate edge by means of a guide roller.

Construction and principle of operation

Portable gas-cutting machine Smena-2M consists of a travel carriage, a power unit, connecting cables and hoses.

The cast aluminum body of the travel carriage mounts the following units:

• Motor drive with drive wheels;
• Castors to be fixed by screw clamps when employing the machine for guided cutting operations;
• Control panel with a speed governor, a toggle switch, a signal lamp and a connector meant for connection to the power unit;
• Bar carrying two supports with cutters and hand wheel meant for displacement of bar;
• Gas distributing manifold;
• Clamp used to secure circular cutting fixtures;
• Two handles used for carrying the machine.

On the sides of the machine body there are shields intended for protecting the machine from the flame of the cutters and metal splashes.

The inlet unions of the manifold are provided with non-return valves intended for protecting the gas lines from blowbacks.