Kjellberg Hi-Focus 280i

Est. $90,000 – $200,000 Possible older model Updated 2026-10-03

This model was not found in Kjellberg's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.

Key Specifications

plasma power source

Hi-Focus 280i, 280A

max cutting thickness mild steel

50 mm

max cutting thickness stainless steel

40 mm

max cutting thickness aluminum

40 mm

recommended precision cut range

0.5–35 mm

output current range

20–280 A

How much does the Kjellberg Hi-Focus 280i cost?

Estimated price range

Est.$90,000 – $200,000

Our best estimate for a cnc plasma cutting in this class — not a quote from Kjellberg. Configuration moves it a long way.

Overview

The Kjellberg Hi-Focus 280i is a precision plasma power source for CNC cutting tables, listed with an output current range of 20–280 A and a maximum cut of 50 mm in mild steel. It is not in the maker's current lineup and may be an older model. The listed figures have not been checked against a manufacturer page, so treat each one as something to confirm on the unit itself.

The gap between two rows is the main thing to understand. Maximum cutting thickness is 50 mm in mild steel and 40 mm in both stainless steel and aluminum, but the recommended precision cut range is 0.5–35 mm. Plate thicker than 35 mm can still be cut up to those maximums, only outside the band recommended for precision work. A shop whose daily plate is above 35 mm should read the maximums as occasional capacity.

At the thin end, the 20 A floor of the current range and a minimum kerf of approx. 1.0 mm on thin gauge are what make fine detail in sheet from 0.5 mm possible. The gas row lists O2, N2, H35/Ar-H2, Air and F5, so the process gas can be changed between carbon steel, stainless and aluminum, and each of those supplies has to exist at the table.

Several rows describe the installation more than the power source. Positioning speed of up to 30,000 mm/min is marked table dependent, the control row reads Kjellberg CNC / third-party compatible, and bevel cutting needs an optional bevel head. Input is 380–480 VAC, 3-phase, 50/60 Hz, and the power supply unit weighs approx. 320 kg.

Full Specifications

Parameter	Value
Plasma Power Source	Hi-Focus 280i, 280A
Max Cutting Thickness Mild Steel	50 mm
Max Cutting Thickness Stainless Steel	40 mm
Max Cutting Thickness Aluminum	40 mm
Recommended Precision Cut Range	0.5–35 mm
Output Current Range	20–280 A
Input Voltage	380–480 VAC, 3-phase, 50/60 Hz
Minimum Kerf Width	Approx. 1.0 mm (thin gauge)
Gas Options	O2, N2, H35/Ar-H2, Air, F5
Cutting Process	Hi-Focus precision plasma
Positioning Speed	Up to 30,000 mm/min (table dependent)
Control System	Kjellberg CNC / Third-party compatible
Bevel Cutting Capability	Available with optional bevel head
Machine Weight	Approx. 320 kg (power supply unit)

Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.

Strengths & Limitations

Strengths

Output current range of 20–280 A, so thin sheet and plate are cut from one power source
Recommended precision cut range of 0.5–35 mm, with a minimum kerf of approx. 1.0 mm on thin gauge
Maximum cutting thickness of 50 mm in mild steel and 40 mm in stainless steel and aluminum
Gas options of O2, N2, H35/Ar-H2, Air and F5 let the process gas follow the material
Input of 380–480 VAC, 3-phase, 50/60 Hz, so one unit covers supplies across that band

Limitations

The recommended precision range ends at 35 mm; the 50 mm mild steel maximum lies outside it
Bevel cutting is available only with an optional bevel head
The 30,000 mm/min positioning speed is table dependent, so it is not a property of the power source alone
No input current or kVA rating is listed, which leaves the electrical connection to be sized from the rating plate

Best For

Precision cutting of sheet and plate inside the 0.5–35 mm recommended range Mixed mild steel, stainless steel and aluminum work with the listed gas options Occasional mild steel cuts up to the 50 mm maximum thickness Cutting tables fitted with the optional bevel head

Frequently Asked Questions

01 How thick can the Hi-Focus 280i cut?

The listed maximums are 50 mm in mild steel and 40 mm in stainless steel and in aluminum. The recommended precision cut range is narrower, 0.5–35 mm, so anything thicker than 35 mm sits outside the band recommended for precision work. These figures are unverified and should be confirmed for the actual unit and torch.

02 Which gases does the Hi-Focus 280i use?

The gas options row lists O2, N2, H35/Ar-H2, Air and F5. The row does not say which gas belongs to which material, so take that from the cutting charts supplied with the unit. Every gas a shop intends to run needs its own supply at the machine.

03 What electrical supply does the Hi-Focus 280i need?

The input voltage row gives 380–480 VAC, 3-phase, 50/60 Hz, and output current is adjustable across 20–280 A. No input current is listed, so the breaker and cable size cannot be worked out from this table and must come from the rating plate. The power supply unit weighs approx. 320 kg.

04 Does the Hi-Focus 280i come with a cutting table and CNC?

The listed figures describe a power source. The control row reads Kjellberg CNC / third-party compatible, the positioning speed of up to 30,000 mm/min is marked table dependent, and bevel cutting requires an optional bevel head. Speed, cutting area and bevel capability therefore depend on the table the source is installed on.