4V HMK Hydraulic 4-Roll Plate Bending Machine

The 4V HMK hydraulic 4-roll plate bending machine from EBR METAL has three driven rolls: hydromotors and planetary gearboxes drive the top roll and both side rolls. The bottom and side rolls move in a pyramidal-linear path on hydraulic pistons.

The range has 42 models with working lengths from 2,050 to 6,100 mm and central rolls from Ø280 to Ø680 mm. NC or CNC control is available.

• Working length 2,050–6,100 mm • Central rolls Ø280–680 mm • 3 driven rolls • NC or CNC optional

The range has 42 models with working lengths from 2,050 to 6,100 mm and central rolls from Ø280 to Ø680 mm. NC or CNC control is available.

Working length 2,050–6,100 mm
Central rolls Ø280–680 mm
3 driven rolls
NC or CNC optional

How the 4V HMK 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.

Depending on the model, its equipment and its capacity, the 4V HMK rolls full circles, elliptical (oval) shapes and parts with different diameters. The balancing system keeps the rolls parallel: hydraulic on models with Ø280–460 mm rolls and electronic on Ø500–680 mm.

4V HMK Product Gallery

4V HMK General Features

Welded steel frames
Three driven rolls: top roll and both side rolls powered by hydromotors and planetary gearboxes
Pyramidal-linear movement of the bottom and side rolls on hydraulic pistons
Full circles, elliptical shapes and varying radii
Overload protection
Three digital readouts for roll positioning
Hydraulic tiltable drop-end
Mobile control panel
Manufactured in conformity with CE requirements

4V HMK Standard Equipment

SAE 1050 (CK45-50) forged or hot-rolled, induction hardened and polished rolls
Conical bending device
Central lubrication system (automatic on Ø500–680 mm)
Hydraulic balancing (Ø280–460 mm) or electronic balancing (Ø500–680 mm)
Double-speed working
Linear guide system

4V HMK Optional Equipment

NC or CNC control
Overhead crane for large diameters
Hydraulic lateral side supports for large diameters
Hydraulic plate ejector
Ground rolls for special jobs
Infinitely variable speed
Electronic balancing on Ø280–460 mm models
Accumulator system for rotating welded parts

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 HMK Technical Specifications

Model	Useful length (mm)	Without pre-bending, min dia = top roll x5 (mm)	Without pre-bending, min dia = top roll x1.5 (mm)	With pre-bending, min dia = top roll x5 (mm)	With pre-bending, min dia = top roll x1.5 (mm)	Central rolls dia (mm)	Side rolls dia (mm)	Motor power (kW)	Working speed (m/min)	Width (mm)	Length (mm)	Height (mm)	Approx. weight (kg)
4V HMK 2050x280	2050	20	16	16	12	280	220	16.5	1.5-5	1700	4350	1850	8550
4V HMK 2050x320	2050	25	20	20	16	320	240	20	1.5-5	1800	4350	1950	10500
4V HMK 2050x350	2050	30	25	25	20	350	260	23.5	1.5-5	1900	4350	1950	11500
4V HMK 2050x380	2050	40	30	30	25	380	300	31.5	1.5-5	2250	4850	2350	14650
4V HMK 2050x400	2050	45	35	35	30	400	300	38.5	1.5-5	2250	4850	2350	16500
4V HMK 2050x460	2050	50	40	40	35	460	380	38.5	1.5-5	2300	4850	2350	19800
4V HMK 2050x500	2050	55	45	45	40	500	400	60	1-4	2800	5550	2900	33500
4V HMK 2050x550	2050	60	50	50	45	550	450	66	1-4	2900	5700	2950	40000
4V HMK 2550x280	2550	16	12	12	10	280	220	16.5	1.5-5	1700	4850	1850	9650
4V HMK 2550x320	2550	20	16	16	12	320	240	20	1.5-5	1800	4850	1950	11600
4V HMK 2550x350	2550	25	20	20	16	350	260	23.5	1.5-5	1900	4850	1950	12800
4V HMK 2550x380	2550	30	25	25	20	380	300	31.5	1.5-5	2250	5350	2350	16720
4V HMK 2550x400	2550	40	30	30	25	400	300	38.5	1.5-5	2250	5350	2350	17800
4V HMK 2550x460	2550	45	35	35	30	460	380	38.5	1.5-5	2300	5350	2350	22400
4V HMK 2550x500	2550	50	40	40	35	500	400	60	1-4	2800	6050	2900	36000
4V HMK 2550x550	2550	55	45	45	40	550	450	66	1-4	2900	6200	2950	43500
4V HMK 3100x280	3100	12	10	10	8	280	220	16.5	1.5-5	1700	5350	1850	10600
4V HMK 3100x320	3100	16	12	12	10	320	240	20	1.5-5	1800	5350	1950	12750
4V HMK 3100x350	3100	20	16	16	12	350	260	23.5	1.5-5	1900	5350	1950	14450
4V HMK 3100x380	3100	25	20	20	16	380	300	31.5	1.5-5	2250	5850	2350	19200
4V HMK 3100x400	3100	30	25	25	20	400	300	38.5	1.5-5	2250	5850	2350	20200
4V HMK 3100x460	3100	40	30	30	25	460	380	38.5	1.5-5	2300	5850	2350	25100
4V HMK 3100x500	3100	45	35	35	30	500	400	60	1-4	2800	6600	2900	38500
4V HMK 3100x550	3100	50	40	40	35	550	450	66	1-4	2900	6750	2950	47000
4V HMK 3100x580	3100	60	45	45	40	580	480	73	1-4	2950	6750	2950	50000
4V HMK 3100x620	3100	70	60	60	50	620	520	123	1-4	3250	7200	3250	62000
4V HMK 3100x680	3100	85	70	70	60	680	580	150	1-4	3500	7700	3600	82500
4V HMK 4100x280	4100	8	6	6	4	280	220	16.5	1.5-5	1700	6450	1850	13000
4V HMK 4100x320	4100	10	8	8	6	320	240	20	1.5-5	1800	6450	1950	14750
4V HMK 4100x350	4100	12	10	10	8	350	260	23.5	1.5-5	1900	6450	1950	17150
4V HMK 4100x380	4100	16	12	12	10	380	300	31.5	1.5-5	2250	6950	2350	22000
4V HMK 4100x400	4100	20	16	16	12	400	300	38.5	1.5-5	2250	6950	2350	23500
4V HMK 4100x460	4100	25	20	20	16	460	380	38.5	1.5-5	2300	6950	2350	29500
4V HMK 4100x500	4100	35	25	25	20	500	400	60	1-4	2800	7600	2900	43500
4V HMK 4100x550	4100	40	30	30	25	550	450	66	1-4	2900	7750	2950	54000
4V HMK 6100x350	6100	8	6	6	4	350	260	23.5	1.5-5	1900	8450	1950	24000
4V HMK 6100x380	6100	10	8	8	6	380	300	31.5	1.5-5	2250	8950	2350	28250
4V HMK 6100x400	6100	13	10	10	8	400	300	38.5	1.5-5	2250	8950	2350	30000
4V HMK 6100x460	6100	15	12	12	10	460	380	38.5	1.5-5	2300	8950	2350	40000
4V HMK 6100x500	6100	20	16	16	12	500	400	60	1-4	2550	9600	2350	67500
4V HMK 6100x550	6100	25	20	20	16	550	450	66	1-4	2900	9750	2900	70000
4V HMK 6100x620	6100	30	25	25	20	620	520	123	1-4	3250	10200	3250	88500

Plate bending capacities are given for 260 N/mm² plate yield strength.

Without pre-bending, flat plate ends may remain depending on the diameter.

Choosing the 4V HMK

The 4V HMK covers the longest working lengths and largest roll sizes in the 4-roll range, with three driven rolls. The 4V HMR drives two rolls, and the 4V HM uses orbital roll movement. Tank and silo shells, pressure-vessel parts and machinery bodies can be rolled on the 4V HMK, 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 HMK Hydraulic 4-Roll Plate Bending Machine in Operation

Watch the 4V HMK 4100 × 380 hydraulic 4-roll plate bending machine in operation.

4V HMK 4100 × 380 — Hydraulic 4-Roll Plate Bending Machine

Request a Quote for the 4V HMK

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.