4V HMR Hydraulic 4-Roll Plate Bending Machine
The 4V HMR hydraulic 4-roll plate bending machine from EBR METAL drives its top roll with an electric motor and planetary gearbox, and its bottom roll through a cardan joint system. The bottom and side rolls move in a pyramidal-linear path on hydraulic pistons.
Working lengths run from 650 to 4,100 mm. Three digital readouts show the roll positions, and NC control is available.
• Working length 650–4,100 mm • Top and bottom rolls Ø80–250 mm • 2 driven rolls • NC optional
The 4V HMR hydraulic 4-roll plate bending machine from EBR METAL drives its top roll with an electric motor and planetary gearbox, and its bottom roll through a cardan joint system. The bottom and side rolls move in a pyramidal-linear path on hydraulic pistons.
Working lengths run from 650 to 4,100 mm. Three digital readouts show the roll positions, and NC control is available.
- Working length 650–4,100 mm
- Top and bottom rolls Ø80–250 mm
- 2 driven rolls
- NC optional
How the 4V HMR Works
The plate is held between the top and bottom rolls and moved by the rotating rolls. The side rolls are used both for pre-bending and for rolling, and usually both plate ends are pre-bent in turn without taking the plate out of the machine.
The 4V HMR rolls full circles and parts with varying radii, and cones with the conical bending device. A hydraulic balancing system keeps the rolls parallel, and overload protection is built in.
4V HMR Product Gallery
4V HMR General Features
- Welded steel construction
- Top roll driven by an electric motor and planetary gearbox; bottom roll driven through a cardan joint system
- Pyramidal-linear movement of the bottom and side rolls on hydraulic pistons
- Full circles and varying radii
- Overload protection
- Three digital readouts for roll positioning
- Hydraulic drop-end
- Mobile control panel
- Manufactured in conformity with CE requirements
4V HMR Standard Equipment
- Induction hardened forged or rolled SAE 1050 (CK45) steel rolls
- Conical bending device
- Hydraulic balancing system
4V HMR Optional Equipment
- NC control
- Overhead crane for large diameters
- Hydraulic lateral side supports for large diameters
- Ground and polished rolls
- Double-speed system
- Infinitely variable speed
- Hydromotor drive for rotation
- Ejector system
NC Control
The NC control has a teach mode: the operator bends a part while the controller records each step, and the saved program repeats the same sequence on the next part.
4V HMR Technical Specifications
| Model | Useful length (mm) | Pre-bending capacity x1.5/x5 (mm) | Bending capacity x1.5/x5 (mm) | Top & bottom roll dia (mm) | Side (lateral) roll dia (mm) | Min. bending dia x1.5/x5 (mm) | Motor power (kW) | Working speed (m/min) | Length (mm) | Width (mm) | Height (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4V HMR 650x80 | 650 | 2.5/3 | 3/3.5 | 80 | 80 | 120/400 | 1.1+0.75 | 5 | 1950 | 950 | 960 | 950 |
| 4V HMR 1050x80 | 1050 | 1.5/2 | 2/2.5 | 80 | 80 | 120/400 | 1.1+0.75 | 5 | 2350 | 950 | 960 | 1150 |
| 4V HMR 1050x100 | 1050 | 2/2.5 | 4/5 | 100 | 90 | 150/500 | 1.1+0.75 | 6.5 | 2350 | 1150 | 960 | 1250 |
| 4V HMR 1050x130 | 1050 | 2.5/3.5 | 5/6 | 130 | 130 | 195/650 | 2.2+1.1 | 5 | 2770 | 1150 | 1100 | 2050 |
| 4V HMR 1270x80 | 1270 | 1/1.5 | 1.5/2 | 80 | 80 | 120/400 | 1.1+0.75 | 5 | 2570 | 950 | 960 | 1250 |
| 4V HMR 1270x100 | 1270 | 1.5/2 | 2/3 | 100 | 90 | 150/500 | 1.1+0.75 | 6.5 | 2570 | 950 | 960 | 1350 |
| 4V HMR 1270x130 | 1270 | 3/4 | 4/5 | 130 | 130 | 195/650 | 2.2+1.1 | 5 | 3020 | 1150 | 1110 | 2150 |
| 4V HMR 1270x150 | 1270 | 4/5 | 5/7 | 150 | 130 | 225/750 | 2.2+1.1 | 6 | 3020 | 1150 | 1110 | 2155 |
| 4V HMR 1270x180 | 1270 | 5.5/7.5 | 7.5/10 | 180 | 150 | 270/900 | 4.0+1.5 | 5 | 3070 | 1350 | 1290 | 2700 |
| 4V HMR 1270x200 | 1270 | 8/10 | 10/12 | 200 | 180 | 300/1000 | 4.0+1.5 | 6 | 3070 | 1350 | 1290 | 3000 |
| 4V HMR 1550x80 | 1550 | 0.5/1 | 1/1.5 | 80 | 80 | 120/400 | 1.1+0.75 | 5 | 2850 | 950 | 960 | 1350 |
| 4V HMR 1550x100 | 1550 | 1/1.5 | 1.5/2 | 100 | 90 | 150/500 | 1.1+0.75 | 6.5 | 2850 | 950 | 960 | 1500 |
| 4V HMR 1550x130 | 1550 | 2.5/3.5 | 3.5/4.5 | 130 | 130 | 195/650 | 2.2+1.1 | 5 | 3300 | 1150 | 1110 | 2250 |
| 4V HMR 1550x150 | 1550 | 3.5/4.5 | 4.5/6.5 | 150 | 130 | 225/750 | 2.2+1.1 | 6 | 3300 | 1150 | 1110 | 2370 |
| 4V HMR 1550x180 | 1550 | 5/7 | 7/9 | 180 | 150 | 270/900 | 4.0+1.5 | 5 | 3350 | 1350 | 1290 | 2900 |
| 4V HMR 1550x200 | 1550 | 7/9 | 9/11 | 200 | 180 | 300/1000 | 4.0+1.5 | 6 | 3350 | 1350 | 1290 | 3250 |
| 4V HMR 1550x220 | 1550 | 8/10 | 10/12 | 220 | 180 | 330/1100 | 5.5+1.5 | 5 | 3500 | 1500 | 1370 | 4250 |
| 4V HMR 1550x250 | 1550 | 10/12 | 12/15 | 250 | 200 | 375/1250 | 7.5+1.5 | 5 | 3500 | 1500 | 1370 | 4650 |
| 4V HMR 2050x130 | 2050 | 2/3 | 3/4 | 130 | 130 | 195/650 | 2.2+1.1 | 5 | 3800 | 1150 | 1110 | 2450 |
| 4V HMR 2050x150 | 2050 | 3/4 | 4/6 | 150 | 130 | 225/750 | 2.2+1.1 | 6 | 3800 | 1150 | 1110 | 2800 |
| 4V HMR 2050x180 | 2050 | 4/6 | 6/8 | 180 | 150 | 270/900 | 4.0+1.5 | 5 | 3850 | 1350 | 1290 | 3300 |
| 4V HMR 2050x200 | 2050 | 6/8 | 8/10 | 200 | 180 | 300/1000 | 4.0+1.5 | 6 | 3850 | 1350 | 1290 | 3750 |
| 4V HMR 2050x220 | 2050 | 7/9 | 9/11 | 220 | 180 | 330/1100 | 5.5+1.5 | 5 | 4000 | 1500 | 1370 | 4800 |
| 4V HMR 2050x250 | 2050 | 8/10 | 10/12 | 250 | 200 | 375/1250 | 7.5+1.5 | 5 | 4000 | 1500 | 1370 | 5350 |
| 4V HMR 2550x150 | 2550 | 2/3 | 3/4 | 150 | 130 | 225/750 | 2.2+1.1 | 6 | 4300 | 1150 | 1110 | 3230 |
| 4V HMR 2550x180 | 2550 | 3/4 | 4/6 | 180 | 150 | 270/900 | 4.0+1.5 | 5 | 4350 | 1350 | 1290 | 3700 |
| 4V HMR 2550x200 | 2550 | 4/6 | 6/8 | 200 | 180 | 300/1000 | 4.0+1.5 | 6 | 4350 | 1350 | 1290 | 4250 |
| 4V HMR 2550x220 | 2550 | 5/7 | 7/9 | 220 | 180 | 330/1100 | 5.5+1.5 | 5 | 4500 | 1500 | 1370 | 5400 |
| 4V HMR 2550x250 | 2550 | 6/8 | 8/10 | 250 | 200 | 375/1250 | 7.5+1.5 | 5 | 4500 | 1500 | 1370 | 6100 |
| 4V HMR 3050x180 | 3050 | 2/3 | 3/4 | 180 | 150 | 270/900 | 4.0+1.5 | 5 | 4850 | 1350 | 1290 | 4100 |
| 4V HMR 3050x200 | 3050 | 3/4 | 4/6 | 200 | 180 | 300/1000 | 4.0+1.5 | 6 | 4850 | 1350 | 1290 | 4750 |
| 4V HMR 3050x220 | 3050 | 4/6 | 6/8 | 220 | 180 | 330/1100 | 5.5+1.5 | 5 | 5000 | 1500 | 1370 | 6000 |
| 4V HMR 3050x250 | 3050 | 5/7 | 7/9 | 250 | 200 | 375/1250 | 7.5+1.5 | 5 | 5000 | 1500 | 1370 | 6800 |
Plate bending capacities are given for 260 N/mm² plate yield strength.
Capacities are given at a bending diameter of 1.5× and 5× the top roll diameter (x1.5/x5).
Choosing the 4V HMR
The 4V HMR drives two rolls and starts at shorter working lengths than the other 4-roll models. The 4V HMK drives three rolls and covers the longest plates; the 4V HM uses orbital roll movement. Tank and silo shells, pressure-vessel parts and machinery bodies can be rolled on the 4V HMR, depending on thickness, working length and diameter.
Send us the material and grade, the thinnest and thickest plate, the working length, the minimum inside diameter and whether the capacity must include pre-bending.
4V HMR Hydraulic 4-Roll Plate Bending Machine in Operation
Watch the 4V HMR 1550 × 200 hydraulic 4-roll plate bending machine in operation.
4V HMR 1550 × 200 — Hydraulic 4-Roll Plate Bending Machine
Request a Quote for the 4V HMR
Send us the material type and grade, the thinnest and thickest sheet or plate, the maximum working length and the minimum inside diameter. A drawing or a photo of a sample part helps us propose a model and configuration.
Frequently Asked Questions About 4V HMR
How is the 4V HMR different from the 4V HMK and 4V HM?
The 4V HMR drives the top and bottom rolls; the 4V HMK drives the top roll and both side rolls. The 4V HMR uses pyramidal-linear roll movement; the 4V HM uses orbital movement.
Is NC control available on the 4V HMR?
Yes. NC control is available as an option. Its teach mode can save a bending sequence for reuse. CNC control is available on the 4V HMK and 4V HM.
What working lengths are available?
From 650 to 4,100 mm.
Can the 4V HMR roll cones?
Yes, with the conical bending device.