Ram/Punch Holder for CNC Press Brakes | Specifications & Selection

Product Specifications

Technical details and manufacturing context for Ram / Punch Holder

Definition

The Ram/Punch Holder is an essential part of a CNC press brake's tooling system that mounts to the moving ram. It provides a rigid, precise interface for attaching various punch tools, ensuring proper alignment and force transmission during the bending process. This component directly affects bending accuracy, repeatability, and tool change efficiency. The holder is designed to accommodate punch shank diameters from 10 to 50 mm, with a clamping stroke of 5 to 20 mm, and offers a holding force of 50 to 120 kN to prevent punch slippage. Positioning accuracy is maintained within ±0.02 mm, ensuring consistent bend results. The operating pressure ranges from 1.0 to 1.6 MPa, and the maximum bending force capacity is 100 to 1000 kN, matching typical press brake capabilities. Constructed from high-strength alloy steel (e.g., 42CrMo4) with a hardness of HRC 40–45, the holder balances wear resistance and toughness. It weighs between 15 and 60 kg, affecting handling and installation. The operating temperature range is -10 to +60 °C, and the ingress protection rating is IP54 to IP65, protecting against dust and water jets. These specifications are reference ranges; actual values must be confirmed for the specific model and application. The holder uses mechanical clamping mechanisms such as wedge locks, hydraulic clamps, or quick-change systems to secure punch tools. During operation, the ram descends, and the holder transmits the bending force from the machine to the punch, which forms the metal sheet against the die below. Proper selection and maintenance of the holder are critical for achieving high-quality bends and minimizing downtime. Always verify model-specific parameters and standards with the legal manufacturer or supplier.

Working Principle

The holder attaches to the press brake's ram and uses mechanical clamping mechanisms (such as wedge locks, hydraulic clamps, or quick-change systems) to secure punch tools. During operation, the ram descends, and the holder transmits the bending force from the machine to the punch, which then forms the metal sheet against the die below. The clamping force must exceed the bending force to prevent slippage, and the positioning accuracy ensures consistent bend angles. The holder's design allows for quick tool changes, improving efficiency. The operating pressure and maximum bending force are critical parameters that must match the press brake's capacity. The holder's material and hardness ensure durability and resistance to wear. Proper maintenance, including checking for wear and ensuring correct clamping pressure, is essential for reliable operation.

Common Materials

Tool steel, Alloy steel, Hardened steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Holding Force	50–120 kN	Must exceed bending force to prevent punch slippage.
Punch Shank Diameter	10–50 mm	Standard shank sizes for compatibility.DIN 9861
Clamping Stroke	5–20 mm	Determines punch insertion depth.
Positioning Accuracy	±0.02 mm	Ensures bend consistency.ISO 230-2
Operating Pressure	1.0–1.6 MPa
Maximum Bending Force	100–1000 kN	Must match press brake capacity.
Material Grade	42CrMo4	High-strength alloy steel for durability.DIN EN 10083
Hardness	HRC 40–45 HRC	Balances wear resistance and toughness.ISO 6508
Weight	15–60 kg	Affects handling and installation.
Operating Temperature	-10–+60 °C	Outside range may affect seals and accuracy.
Ingress Protection	IP54–IP65	Protects against dust and water jets.IEC 60529

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

Clamping Mechanism
Secures the punch tool in place using mechanical or hydraulic force

Material: Hardened steel
Mounting Plate Part
Interface that attaches the holder to the press brake ram

Material: Alloy steel
Alignment Features Part
Precision surfaces and guides that ensure proper tool positioning

Material: Hardened tool steel
Holder Body
The body that carries the clamp and the locating faces and takes the bending load.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ram / Punch Holder.

Applied To / Applications

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

CNC Press Brake

View system integration details

Manufacturers of Ram / Punch Holder

Manufacturer profiles associated with Ram / Punch Holder.

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Frequently Asked Questions

What is the function of a Ram/Punch Holder?

The Ram/Punch Holder mounts to the press brake's ram and securely holds the punch tool. It ensures proper alignment and transmits the bending force from the machine to the punch, which forms the metal sheet against the die. It directly affects bending accuracy, repeatability, and tool change efficiency.

What are the key specifications to consider when selecting a Ram/Punch Holder?

Key specifications include holding force (50–120 kN), punch shank diameter (10–50 mm), clamping stroke (5–20 mm), positioning accuracy (±0.02 mm), operating pressure (1.0–1.6 MPa), maximum bending force (100–1000 kN), material grade (e.g., 42CrMo4), hardness (HRC 40–45), weight (15–60 kg), operating temperature (-10 to +60 °C), and ingress protection (IP54–IP65). These are reference ranges; verify with the manufacturer for your specific model.

How does the clamping mechanism work?

The holder uses mechanical clamping mechanisms such as wedge locks, hydraulic clamps, or quick-change systems to secure the punch tool. The clamping force must exceed the bending force to prevent slippage. The clamping stroke determines the punch insertion depth, and the positioning accuracy ensures consistent bend results.

What maintenance is required for a Ram/Punch Holder?

Regularly inspect the holder for wear, especially on clamping surfaces. Ensure that the clamping pressure is within the specified range (1.0–1.6 MPa) and that the operating temperature stays within -10 to +60 °C. Check for any signs of damage or deformation. Follow the manufacturer's maintenance guidelines to ensure reliable operation and longevity.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 500 MPa
other spec:	Max bending force: 2000 kN, Tool weight capacity: 50 kg
temperature:	-20°C to 150°C

Ram / Punch Holder

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards