Punch Holders: Weight Capacity 5-25 kg, Clamping Force 15-50 kN

Component Specifications

Definition

Punch holders are specialized clamping devices installed in the rotating turret of CNC punch presses. They precisely position and secure punch tools during metal forming operations, ensuring consistent alignment, depth control, and tool stability during high-speed punching cycles. These components interface between the punch press ram and the punch tool, transmitting force while maintaining tool orientation.

Working Principle

Punch holders operate by mechanically clamping punch tools using hydraulic, pneumatic, or mechanical locking mechanisms. During operation, the rotating turret positions the correct punch holder under the ram. The ram descends, transmitting force through the holder to the punch, which penetrates the workpiece. The holder maintains precise alignment and prevents tool rotation or displacement during impact.

Materials

High-strength alloy steel (AISI 4140/4340), hardened to 45-55 HRC; wear-resistant surfaces with chrome plating or nitriding; corrosion-resistant variants use stainless steel (17-4PH) for specific applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Holder Type	Standard/Quick-Change
Clamping Force	15-50 kN
Weight Capacity	5-25 kg
Tool Shank Diameter	20-50 mm
Operating Temperature	-10°C to 80°C
Maximum Punch Diameter	100 mm
Height Adjustment Range	±2 mm

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

Standards

DIN 55201, ISO 12164-1

Parent Products

This component is used in the following industrial products

Rotating Turret

A rotating component in an industrial rotary tablet press that holds multiple punch and die sets, enabling continuous tablet production through sequential compression stations.

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Engineering Analysis

Risks & Mitigation

Tool ejection during operation
Misalignment causing poor hole quality
Wear leading to dimensional inaccuracy
Fatigue failure under cyclic loading

FMEA Triads

Trigger: Insufficient clamping force
Failure: Tool slippage or ejection
Mitigation: Regular torque verification, use of force monitoring systems

Trigger: Wear on clamping surfaces
Failure: Reduced holding precision
Mitigation: Periodic surface inspection, scheduled replacement

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01 mm concentricity, ±0.02 mm perpendicularity

Test Method

Coordinate measuring machine (CMM) verification, laser alignment testing, functional load testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Punch Holders

Manufacturer profiles associated with Punch Holders.

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Related Components

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Frequently Asked Questions

What maintenance is required for punch holders?

Regular inspection for wear, cleaning of clamping surfaces, lubrication of adjustment mechanisms, and verification of alignment accuracy every 500 operating hours.

Can punch holders be used with different punch press brands?

While some holders are brand-specific, many follow standardized interfaces (ISO/DIN) allowing cross-compatibility with proper adapter systems.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Punch Holders