STELLA 250 Semi-Automatic Stretch Film Slitter Rewinder

Key features

• Up to 500 m/min rewinding speed
• Slitting from 50 mm × 10 rolls to 250 mm × 2 rolls
• Jumbo rolls 300–600 mm wide, up to Ø450 mm and 70 kg
• Finished rolls up to Ø250 mm on 38, 50 or 76 mm cores
• Film from 5 to 30 micron
• Pneumatic and manual feeding
• Simple main control panel

Technical specifications

Max. rewinding speed	500 m/min
Max. jumbo roll diameter	450 mm
Max. jumbo roll weight	70 kg
Jumbo roll width	300–600 mm
Jumbo roll core	76 mm
Max. finished roll diameter	250 mm
Finished roll inner diameter	38, 50, 76 mm
Slitting widths	50 mm × 10 rolls to 250 mm × 2 rolls
Film thickness	5–30 micron
Installed power	4 kW
Nominal power consumption	4 kWh
Electric supply	380 V, 3P + N + G, 50/60 Hz
Air supply	6–8 bar, 22 Nl/min
Machine dimensions (W × L × H)	1407 × 965 × 1335 mm
Net weight	620 kg

Values from the Bronse catalogue 2026. Ask us for the configuration that matches your film and rolls.

Advantages of Bronse slitter rewinders

• Accuracy: servo drive technology gives a length repeatability of less than 0.5 m.
• Flexibility: rolls in different cores, lengths and widths from the same machine.
• Practical and user-friendly: starts quickly and can be run by any operator after a couple of hours of training.
• Compact: monoblock design that fits into small areas.
• Built to last: robust design for long service life.

When to choose STELLA 250

• Smaller or start-up rewinding operations
• Frequent changes of roll size and short runs
• Limited floor space – the machine is 1407 × 965 mm
• Lower power and air needs: 4 kW and 22 Nl/min

How STELLA 250 works

1. A jumbo roll 300–600 mm wide and up to Ø450 mm is loaded – pneumatically or by hand.
2. The slitting unit is set to the width you need, from 10 rolls of 50 mm to 2 rolls of 250 mm.
3. Roll length and speed are set on the main control panel.
4. The machine slits and rewinds at up to 500 m/min.
5. At the set length the film is cut and the finished rolls are removed.

Roll formats explained

Most stretch film is sold in three formats, and a rewinder is what turns the first into the other two:

• Jumbo (mother) rolls come straight off the extrusion line, usually on 76 mm cores. They are too large and heavy to wrap pallets with.
• Hand rolls are short, light rolls for manual wrapping, typically on small cores so they can be held on a handle or dispenser.
• Machine rolls are longer, heavier rolls for pallet wrapping machines. Bronse pallet wrappers, for example, take rolls 500 mm wide, up to Ø250 mm and 16 kg on 76 mm cores.

Roll weight is easy to estimate: weight (kg) ≈ width (m) × length (m) × thickness (micron) × 0.92 ÷ 1,000. A 500 mm × 300 m × 17 micron hand roll weighs about 2.3 kg; a 500 mm × 1,500 m × 23 micron machine roll about 16 kg.

Starting small, growing later

STELLA 250 is a practical first rewinder: it needs only 4 kW and 22 Nl/min of air, weighs 620 kg and fits into 1407 × 965 mm. When volumes grow, ULTIMA 250 adds fully automatic operation, up to 1,200 m/min and jumbo rolls up to 700 mm wide, so the same roll formats can be produced faster.

What makes a good finished roll

Buyers judge a rewound roll quickly, so it is worth checking samples against these points:

• Straight edges. The film layers should sit flush; a roll whose layers slide sideways (telescoping) is hard to sell and hard to use.
• Consistent length. Every roll sold as 300 m should hold 300 m. Servo-driven length control is what keeps this repeatable.
• Even winding. No wrinkles, trapped air or loose outer layers, so the roll stays round in transport.
• Film properties kept. Rewinding should not over-stretch standard film or damage cling.

Actual running speed depends on the film. Thin or uneven jumbo rolls normally run below the maximum speed, so send us your film data and we will tell you what to expect.

Preparing your site for the STELLA 250

Everything you need to plan the installation is in the catalogue values:

• Electricity: 380 V, 3P + N + G, 50/60 Hz, 4 kW installed power (nominal consumption 4 kWh).
• Compressed air: 6–8 bar, 22 Nl/min. Clean, dry air keeps pneumatic parts working longer.
• Floor space: 1407 × 965 mm footprint, 1335 mm high for the machine itself, plus room to bring in jumbo rolls, take finished rolls away and let the operator move around.
• Floor load: net weight 620 kg.
• Jumbo handling: jumbo rolls weigh up to 70 kg, so plan how they reach the machine – a hoist, lifting trolley or crane.

Operation and routine care

STELLA 250 starts quickly and can be run by any operator after a couple of hours of training. All manual operations, including maintenance, can be done without special experience.

• Keep rollers and guides free of film residue and dust.
• Check blades and cutting parts regularly and replace them when the cut is no longer clean.
• Drain the compressed-air filter and check the air pressure stays at 6–8 bar.
• Follow the lubrication and inspection intervals in the operating manual.

Machines with remote diagnostics can be checked by our service team over the internet, which shortens the time to a fix.

Frequently asked questions

What is the difference between STELLA 250 and ULTIMA 250?

STELLA 250 is semi-automatic, up to 500 m/min, for film 5–30 micron. ULTIMA 250 is fully automatic, up to 1,200 m/min (1,500 m/min with double servo motor), for film 5–50 micron and jumbo rolls up to 700 mm.

Does STELLA 250 make cling film rolls?

Yes. It produces stretch film hand rolls, machine rolls and cling film rolls.

Which film thickness can STELLA 250 process?

Film from 5 to 30 micron. For film up to 50 micron, see ULTIMA 250 or NORMA 250.

How accurate is the roll length?

Servo drive technology gives a length repeatability of less than 0.5 m.

Related machines

• ULTIMA 250 – fully automatic slitter rewinder
• OPTIMA 30 – cling film turret rewinder