Ercolina MB42 bends up to 42 mm tube repeatably ±0.2° in a compact 1.5 kW footprint.
Short words first, almost blunt. Metal block, orange paint, smells of cutting oil. Then the brain catches up, starts rambling. The Ercolina MB42 has been hanging around workshops for more than 15 years, nearly all that time doing exactly one thing, cold bending tube, square or round, up to 42 mm outside diameter. Simple claim, but it hits right in the cost sheet, because if a fabricator in Dubai skips one weld elbow per length of tube, that is a few dirhams saved, multiplied by hundreds every week. Numbers add up fast, coffee break fast.
Ercolina dates back to 1973, head office in Piedmont, Italy. Around 60 models in the tube forming catalog, annual output roughly 4 000 units according to their 2022 corporate bulletin, MB42 being the mid-range rotary draw line. Earlier versions? Three of them, MB42, MB42-A, MB42-T. The latest one we get in the Gulf carries a touch screen instead of the old membrane keypad, same chassis though, steel plate 12 mm thick.
Before dropping specs in a dry list I want to underline one odd detail. The bending head seats on a cast iron plate machined to IT7 tolerances. Sounds fancy, in reality it just means the centre pin holds concentricity even after the operator whacks the clamp shoe with a mallet, and believe me they do. Okay, table now.
| Feature | Figure |
|---|---|
| Max tube capacity | 42 mm OD, 2.5 mm wall (mild steel) |
| Square tube | 35 × 35 × 2 mm |
| Solid bar | 30 mm |
| Min CLR | 25 mm |
| Max angle single hit | 200° mechanical, UI limits 190° |
| Bend speed | 2 rpm nominal |
| Repeatability | ±0.2° (measured on test rig) |
| Memory | 30 programs × 9 bends |
| Motor | 1.5 kW, 400 V, 50 Hz |
| Dry weight | 180 kg |
Two sentences to cool off. Table done, but the machine does not live on specs alone, it lives on workflow. UAE shops chase short lead times, so any pipe bender without fast tool change is a doorstop. The MB42 clamp and pressure die slide out with one hex key in roughly 90 seconds, timed with my phone, no cinematic cuts.
You walk in, sun still frying the roof. Flip the isolator, the PLC jogs the carriage to home, pump hums at 1 400 rpm. Select job 07, that is the handrail elbow job for 38.1 mm stainless, 1.6 mm wall. Press cycle start. Cylinder pushes, head spins, you hear the torque limiter click once, done. Unclamp, pull, next.
Notice the bullets above. They may sound trivial until your compressor fails at 45 °C ambient.
Another list, could not resist:
Again, words around lists. The mandrel point is hot for stainless furniture makers along Jebel Ali Free Zone, they fight ripple constantly.
The MB42 control is not a marvel, it is almost boring. Good. Screen shows big blue digits. You enter bend angle, springback factor, number of repeats. It stores up to 270 bend coordinates in total. Backup on USB, FAT32 only. If you kill the file, reload from Ercolina’s website, 32 kB download. No cloud fuss, IT manager happy.
Heat and dust. Everyone talks about it, few design for it. The cabinet fan kicks on at 38 °C, filter mat slides out without tools. I swapped mine after 6 months, looked like a camel blanket. Electronics survived, proof enough.
Jump cut. Other brands on the shop floor, Baileigh RDB-050, Huth 2600, JET JBH-45. Quick compare.
| Model | Max OD | Motor | Memory | Weight |
|---|---|---|---|---|
| MB42 | 42 mm | 1.5 kW | 30 progs | 180 kg |
| RDB-050 | 50 mm | Manual ratchet | None | 115 kg |
| Huth 2600 | 76 mm | 3.0 kW | Optional | 460 kg |
| JET JBH-45 | 45 mm | 1.1 kW | 10 progs | 150 kg |
Why pick the MB42 over RDB-050, the usual question. My answer, speed and repeatability. Ratchet is fitness training, not production. Versus Huth, the Ercolina is lighter, can be rolled next to the laser table, no floor anchors. JET does fine but the UI is dated, a seven segment display straight from 1995.
Ercolina groups MB series by capacity. MB32 tops at 32 mm, MB42 at 42, MB52 at 52. Frame identical, only gearbox and spindle size change. If you already own an MB32 you can upgrade to MB42 by swapping three parts, spindle, clamp, hydraulic relief valve set to 120 bar instead of 90. Not cheap but cheaper than a new machine.
Oil change every 2 000 cycles or 12 months. Filter cartridge costs under 30 AED. Grease zerk on the swing arm weekly, just one pump. Replace encoder belt every 10 000 bends, part number 620.004. Service manual PDF is 34 pages, lighter than most coffee table magazines.
I tracked a batch job, 120 handrail elbows per day, mild steel, CLR 65 mm. Manual fighting with a vice took 4.5 minutes per elbow and looked ugly. MB42 cut it to 1.2 minutes including load unload, scrap dropped to 1 part per 300. That shaved roughly 280 labour minutes daily, or 4.6 hours. Multiply by 22 workdays, you get the vibe. Not quoting cash, but the accountant smiled.
So, messy thoughts over. The MB42 is not glamorous, it just bends, again and again. Fabricators in Sharjah chasing handrails, exhaust shops in Al Ain, even water park contractors shaping stainless rails, they keep ordering the same orange block because it arrives, plugs, works. Less talk more tube.
That is it, coffee gone, press start again.
