Back Gauge System for Metal Bending Presses

Product Specifications

Technical details and manufacturing context for Back Gauge System

Definition

The Back Gauge System is a critical component of industrial metal bending presses that precisely positions sheet metal or plate material against a reference point before the bending operation. It ensures accurate bend locations by controlling the distance from the material edge to the bending line, enabling repeatable and precise metal forming processes. The system typically consists of a gauge finger or stop block mounted on a carriage that moves along a linear axis. The carriage is driven by mechanical, hydraulic, or servo-driven mechanisms, and its position is controlled by a programmable logic controller (PLC) or a dedicated numerical control (NC) unit. Modern systems incorporate digital encoders for closed-loop feedback, allowing for high positioning accuracy and repeatability. The back gauge stroke determines the maximum workpiece depth that can be positioned, typically ranging from 100 to 1000 mm. Positioning speed ranges from 100 to 300 mm/s, balancing productivity and accuracy. Positioning accuracy is typically ±0.05 to ±0.1 mm, while repeatability is ±0.02 to ±0.05 mm, ensuring consistent bend angles across multiple operations. The maximum back gauge force ranges from 500 to 5000 N, which must exceed the force exerted by the workpiece during bending. The system operates on a three-phase supply voltage of 220–480 V AC (tolerance ±10%) and a control voltage of 24 V DC (±10%) for PLC and sensor circuits. Operating temperature range is -40 to 85 °C, and protection class is IP54 for indoor use or IP65 for dusty or wet environments. The weight of the system ranges from 50 to 500 kg, affecting installation and structural support requirements. Materials commonly used include steel, aluminum alloy, and precision bearings. For procurement, verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The back gauge system positions a stop block or gauge finger at a programmed distance from the bending line. The operator or an automatic feeder pushes the sheet metal against the stop, establishing the exact location for the bend. The system uses mechanical, hydraulic, or servo-driven mechanisms to move the stop. Digital controls, encoders, and programmable logic enable automated positioning. The stop retracts after the bend to allow material removal.

Common Materials

Steel, Aluminum alloy, Precision bearings

Technical Parameters

Parameter	Typical range	Notes & selection driver
Maximum Back Gauge Stroke	100–1000 mm	Determines the maximum workpiece depth that can be positioned.
Positioning Speed	100–300 mm/s	Higher speed increases productivity but may reduce accuracy.
Positioning Accuracy	±0.05–±0.1 mm	Critical for consistent bend angles and part quality.
Repeatability	±0.02–±0.05 mm	Ensures consistent results across multiple bends.
Maximum Back Gauge Force	500–5000 N	Must exceed the force exerted by the workpiece during bending.
Supply Voltage	220–480 V AC	Three-phase; voltage tolerance ±10%.IEC 60038
Control Voltage	24 ±10% V DC	For PLC and sensor circuits.IEC 61131-2
Operating Temperature	-40–85 °C	Outside this range, performance may degrade.IEC 60068-2-1/2
Protection Class	IP54–IP65	IP54 for indoor, IP65 for dusty or wet environments.IEC 60529
Weight	50–500 kg	Affects installation and structural support requirements.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Gauge Finger Part
Contact point for material positioning

Material: Hardened steel
Linear Guide
Provides smooth and precise movement

Material: Steel with ball bearings
Servo Motor
Drives the positioning mechanism

Material: Electrical components
Encoder
Measures position for feedback control

Material: Electronic components

Manufacturers of Back Gauge System

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

G-Press (Jiangsu hongdong industrial automation co.,ltd)

Shanghai, CN

Also makes: Control System, Hydraulic Press Brake, Clamping System and 2 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the typical stroke range of a back gauge system?

The maximum back gauge stroke typically ranges from 100 to 1000 mm, determining the maximum workpiece depth that can be positioned. Confirm the exact stroke for your specific model with the manufacturer.

What positioning accuracy can be expected?

Positioning accuracy is typically ±0.05 to ±0.1 mm, and repeatability is ±0.02 to ±0.05 mm. These values are critical for consistent bend angles and part quality. Verify these parameters for the actual model.

What are the electrical requirements?

The system typically requires a three-phase supply voltage of 220–480 V AC (tolerance ±10%) and a control voltage of 24 V DC (±10%) for PLC and sensor circuits. Always check the nameplate and technical documentation.

What environmental conditions are supported?

The operating temperature range is -40 to 85 °C, and the protection class is IP54 for indoor use or IP65 for dusty or wet environments. Ensure the system is suitable for your installation environment.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	N/A (mechanical positioning system)
other spec:	Positioning accuracy: ±0.01 mm, Repeatability: ±0.005 mm, Max travel speed: 300 mm/s, Protection class: IP54
temperature:	0°C to 50°C (operating), -20°C to 70°C (storage)

Back Gauge System

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards