Structured Manufacturing Data (2026)

Back Gauge

Based on aggregated insights from structured 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 Part
Contact point for positioning sheet metal
Guide Rail Part
Provides smooth linear movement for the gauge assembly
Drive Mechanism
Controls movement of the back gauge (manual crank, servo motor, or ball screw)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Back Gauge.

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 Structure

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

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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 Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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