Ermak Servo-Bend 4100-135
Key Specifications
Pressing Force
Working Length
Distance Between Uprights
Throat Depth
Open Height
Ram Stroke
Overview
The Ermak Servo-Bend 4100-135 is a servo-electric CNC press brake from Ermaksan's Servo-Bend series, providing 135 tonnes of pressing force across a 4,100 mm working length. As Ermaksan's fully electric press brake offering, the Servo-Bend series represents the company's technology response to growing market demand for oil-free, energy-efficient bending solutions, bringing electric drive precision to the large-format working length segment that is typically dominated by hydraulic machinery.
The Servo-Bend 4100-135 replaces the hydraulic pump and cylinder arrangement of conventional press brakes with servo motors driving precision ball screws on each Y-axis column. This direct-drive architecture eliminates hydraulic oil from the machine entirely, removing contamination risks and reducing energy consumption by 40–60% versus equivalent hydraulic press brakes on typical production duty cycles. The servo-electric drive provides instantaneous response to CNC positioning commands with Y-axis repeatability of ±0.01 mm, enabling consistent multi-bend programs on complex parts without the warm-up delays associated with hydraulic systems.
At 4,100 mm working length, the Servo-Bend 4100-135 addresses the large-panel and long-profile segment where servo-electric machines have historically been less common than hydraulic equivalents. Ermaksan's engineering of the 4,100 mm platform in servo-electric format makes this machine a notable option for fabricators who need long working length combined with the energy and precision advantages of electric drive — a combination not widely available from other manufacturers at this price point.
The machine is equipped with the Delem DA-66T CNC control, providing 3D graphical bend programming, offline simulation, and stored program management. The back-gauge system provides motorised X and R axes as standard, with optional Z1/Z2 independent finger positioning for complex asymmetric part sequences. An active crowning table compensates for any frame deflection across the 4,100 mm working length, maintaining consistent angles end to end.
The Ermak Servo-Bend 4100-135 competes with Salvagnini's B3 series, Amada's HFE-M2 series, and Trumpf's TruBend 5000 series in the servo-electric large-format press brake market. For fabricators seeking a long working length servo-electric machine at a lower price point than premium Western European alternatives, the Servo-Bend 4100-135 offers a compelling combination of clean operation, precision, and Ermaksan's cost-competitive manufacturing base.
Full Specifications
| Parameter | Value |
|---|---|
| Pressing Force | 135 tonnes (1,350 kN) |
| Working Length | 4,100 mm |
| Distance Between Uprights | 3,550 mm |
| Throat Depth | 420 mm |
| Open Height | 525 mm |
| Ram Stroke | 200 mm |
| Approach Speed | 180 mm/s |
| Bending Speed | 1–15 mm/s (programmable) |
| Return Speed | 160 mm/s |
| Back-Gauge Axes | 4 axes (X, R, Z1, Z2) |
| Y-Axis Positioning Accuracy | ±0.01 mm |
| Drive Type | Servo-electric (dual ball screw) |
| Control | Delem DA-66T |
| Machine Weight | Approx. 14,500 kg |
Strengths & Limitations
Strengths
- Servo-electric drive eliminates hydraulic oil entirely, making the Servo-Bend 4100-135 suitable for clean fabrication environments and food-grade applications
- Y-axis repeatability of ±0.01 mm enables precise angle control on complex multi-bend programs across the full 4,100 mm working length
- 40–60% energy savings versus hydraulic equivalents on typical production duty cycles reduce operational costs over machine lifetime
- 4,100 mm working length handles large panels and long structural profiles that most servo-electric machines cannot accommodate
- Delem DA-66T control provides 3D simulation and offline programming compatibility for efficient setup and program management
Limitations
- Servo-electric drive premium adds cost compared to equivalent hydraulic press brakes at 135 tonnes / 4,100 mm capacity
- Ball screw and servo motor maintenance requires specialised technicians; service network in some export markets may have limited coverage
- 135-tonne force at 4,100 mm limits application to sheet metal and light structural work — heavy plate bending requires higher-tonnage CRV or HYB models
Best For
Frequently Asked Questions
01
At long working lengths, hydraulic synchronisation between Y1 and Y2 cylinders is more challenging to maintain at high precision over the full stroke. The Servo-Bend 4100-135's dual ball screw servo-electric drive provides independent, directly-controlled positioning on each column with Y-axis repeatability of ±0.01 mm, achieving tighter synchronisation than conventional hydraulic systems. This is particularly beneficial for complex multi-bend programs on long parts where angular consistency from end to end is critical.
02
The Falcon Bend series is a servo-hydraulic press brake — it uses servo motors to drive the hydraulic pump, but retains hydraulic oil as the force transmission medium. The Servo-Bend is fully servo-electric, replacing hydraulic cylinders entirely with servo motors and ball screws. The Servo-Bend delivers higher Y-axis precision, lower energy consumption, and an oil-free environment compared to the Falcon Bend, but at a higher acquisition cost per tonne of capacity.
03
At 135 tonnes over 4,100 mm, the Servo-Bend can bend mild steel up to approximately 6–8 mm, stainless steel up to 4–5 mm, and aluminium up to 8–10 mm across the full working length. For shorter bends concentrated over part of the table, higher thicknesses are achievable. Always use Ermaksan's bending force tables to confirm capacity for specific material grades and bend geometries.
04
Ermaksan offers optional laser angle measurement systems for the Servo-Bend series that measure actual bend angles after each stroke and feed corrections back to the Delem control. This option is recommended for high-precision applications or when bending materials with variable springback properties, such as high-strength aluminium alloys or dual-phase steel.
05
The Servo-Bend 4100-135 uses standard European-style Promecam/Wila-compatible tooling, allowing use of established tooling brands including Wila, Rolleri, Wilson, and Trumpf-style punches and dies without adapters. Shops investing in a new tooling inventory with the Servo-Bend can source from multiple European tooling suppliers, avoiding dependency on a single proprietary tooling system.
Community Discussions
Community discussion — Servo Motors / Drives - CNCzone
Troubleshooting and problem-solving — Servo motor brake - CNCzone
Community discussion — Slow but fairly new ermak cnc brake. Wanna speed things up
Troubleshooting and problem-solving — How to fix servo alarm error - CNCzone
Links to community discussions. Summaries are editorial — visit the original thread for full context.
