Industry-Verified Manufacturing Data (2026)

Back Gauge

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Back Gauge used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Back Gauge is characterized by the integration of Gauge Finger and Guide Rail. In industrial production environments, manufacturers listed on CNFX commonly emphasize Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A positioning device on a hydraulic press brake that controls the bending position of sheet metal.

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Product Specifications

Technical details and manufacturing context for Back Gauge

Definition
The back gauge is a critical component of a hydraulic press brake that provides precise positioning of sheet metal before bending operations. It consists of a movable stop or fence that can be adjusted to control the distance from the bend line to the edge of the material, ensuring accurate and repeatable bends. This component is essential for maintaining dimensional accuracy in metal fabrication processes.
Working Principle
The back gauge operates by moving along the length of the press brake bed, either manually or through motorized control. When sheet metal is placed against the gauge fingers, it establishes a reference point for the bending operation. The position can be adjusted via manual cranks, servo motors, or CNC controls to achieve different bend positions. Some advanced systems feature multiple fingers that can be programmed independently for complex bending sequences.
Common Materials
Steel, Aluminum alloy
Technical Parameters
  • Maximum travel distance of the back gauge from the bending line (mm) Customizable
Components / BOM
  • Gauge Finger
    Contact point for positioning sheet metal
  • Guide Rail
    Provides smooth linear movement for the gauge assembly
  • Drive Mechanism
    Controls movement of the back gauge (manual crank, servo motor, or ball screw)
Engineering Reasoning
0.1-0.5 mm positioning accuracy, 0-1000 mm travel range, 0.5-2.0 m/s positioning speed
Positioning error exceeding ±0.1 mm tolerance, backlash exceeding 0.05 mm, servo motor torque dropping below 80% rated value
Design Rationale: Servo motor cogging torque ripple at 5-15% of rated torque causing positioning inaccuracy, ball screw thermal expansion of 12 μm/m·°C at 40°C temperature rise, encoder interpolation error at 0.001 mm resolution threshold
Risk Mitigation (FMEA)
Trigger Servo drive current overshoot exceeding 150% rated current for 100 ms
Mode: Servo motor demagnetization with 30% torque loss
Strategy: Implement current limiting circuit with 120% threshold and 50 ms response time
Trigger Linear guideway contamination with ISO 4406 18/16/13 particle count
Mode: Ball screw jamming at 10 N·m static friction torque
Strategy: Install IP65-rated bellows seal with 0.3 μm filtration efficiency

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Back Gauge.

hydraulic press brake back gauge sheet metal bending positioning device steel back gauge for press brake precision back gauge with drive mechanism aluminum alloy press brake gauge finger

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Hydraulic Press Brake
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Sheet Metal Guillotine Shear
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Metal Plate Bending Machine
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Bending Tool Assembly
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (positioning device, not pressure-bearing)
other spec: Positioning accuracy: ±0.01 mm, Repeatability: ±0.005 mm, Max back gauge load: 50 kg, Travel speed: 0-500 mm/s
temperature: 0°C to 50°C (operating), -20°C to 70°C (storage)
Media Compatibility
✓ Sheet metal fabrication shops ✓ Hydraulic press brake environments ✓ Industrial manufacturing facilities with CNC integration
Unsuitable: High-vibration environments (e.g., near forging hammers or heavy stamping presses)
Sizing Data Required
  • Maximum sheet length (mm)
  • Required positioning accuracy (mm)
  • Press brake tonnage and bed length (for mounting compatibility)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Misalignment-induced wear
Cause: Improper installation or thermal expansion causing guide rails/leadscrews to deviate from parallel alignment, resulting in uneven contact surfaces and accelerated wear
Bearing/seal degradation
Cause: Contaminant ingress (metal chips, dust) combined with inadequate lubrication leading to increased friction, overheating, and eventual bearing failure or seal leakage
Maintenance Indicators
  • Irregular grinding or scraping sounds during movement indicating misalignment or bearing issues
  • Visible scoring marks or metal shavings accumulating along guide rails suggesting excessive wear
Engineering Tips
  • Implement laser alignment verification during installation and quarterly checks to maintain parallel alignment within 0.05mm tolerance
  • Establish preventive lubrication schedule using manufacturer-specified grease and install protective bellows/covers to prevent contaminant ingress

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ANSI B11.19 - Performance criteria for safeguarding CE Marking - Machinery Directive 2006/42/EC
Manufacturing Precision
  • Positioning accuracy: +/-0.05 mm
  • Parallelism to ram: 0.1 mm per meter
Quality Inspection
  • Laser interferometer accuracy verification
  • Functional safety test for positioning system

Factories Producing Back Gauge

Verified manufacturers with capability to produce this product in China

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✓ 92% Supplier Capability Match Found

T Technical Director from United States Feb 23, 2026
★★★★★
"The Back Gauge we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
P Project Engineer from United Arab Emirates Feb 20, 2026
★★★★☆
"Found 46+ suppliers for Back Gauge on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Australia Feb 17, 2026
★★★★★
"The technical documentation for this Back Gauge is very thorough, especially regarding technical reliability."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

15 sourcing managers are analyzing this specification now. Last inquiry for Back Gauge from Vietnam (25m ago).

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Frequently Asked Questions

What is the primary function of a back gauge in machinery manufacturing?

A back gauge precisely positions sheet metal on a hydraulic press brake to control bending location, ensuring accurate and repeatable bends in metal fabrication processes.

What materials are used in back gauge construction and why?

Back gauges are typically constructed from steel for structural durability and aluminum alloy for lightweight moving components, providing optimal balance between strength and precision movement.

How do the drive mechanism and guide rail components work together?

The drive mechanism moves the gauge finger along the guide rail with precision, allowing controlled positioning of sheet metal for consistent bending operations on press brakes.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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