Punch Head: Diameter Range 1-100 mm, Length 50-200 mm

Component Specifications

Definition

The punch head is a critical component of the lower punch assembly in industrial presses and stamping machines. It is a hardened tool that transmits force from the press mechanism to the workpiece, creating precise holes, indentations, or formed shapes through plastic deformation or shearing. Typically mounted in a punch holder, it works in conjunction with a die to perform operations like blanking, piercing, or forming in sheet metal, plastics, or composite materials.

Working Principle

The punch head operates on the principle of force transmission and material displacement. When the press ram descends, the punch head contacts the workpiece material, applying concentrated pressure that exceeds the material's yield strength. This causes either shearing (in piercing/blanking) or plastic deformation (in forming operations). The punch head's precise geometry determines the shape created, while its hardness and surface finish ensure durability and clean cuts.

Materials

Typically made from high-carbon tool steels (A2, D2, O1), high-speed steels (M2, M42), or carbide (tungsten carbide) for extreme wear resistance. Heat treatment to 58-65 HRC is standard. Surface treatments may include TiN, TiCN, or DLC coatings to reduce friction and extend tool life.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	50-200 mm
Hardness	58-65 HRC
Tolerance	±0.01 mm
Shank Type	Straight, Shouldered, or Ball-lock
Diameter Range	1-100 mm
Surface Finish	Ra 0.4 μm or better

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

Standards

ISO 9181, ISO 8020, DIN 9840, DIN 9841

Parent Products

This component is used in the following industrial products

Lower Punch Assembly

A critical component in rotary tablet presses that forms the bottom surface of tablets during compression.

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Engineering Analysis

Risks & Mitigation

Wear and dimensional degradation
Chipping or fracture under overload
Misalignment causing burrs or tool damage
Fatigue failure from cyclic loading
Corrosion in humid environments

FMEA Triads

Trigger: Insufficient hardness or improper heat treatment
Failure: Premature wear leading to oversized holes or poor edge quality
Mitigation: Use certified materials with proper heat treatment; implement regular inspection and measurement protocols

Trigger: Excessive clearance between punch and die
Failure: Burr formation, increased wear, or punch deflection
Mitigation: Maintain recommended clearance (typically 5-10% of material thickness); use precision guides and alignment systems

Trigger: Material buildup or galling
Failure: Increased friction, seizing, or surface damage to workpiece
Mitigation: Apply appropriate lubricants; use coatings like TiN; implement regular cleaning schedules

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 2768-mK for general dimensions, ISO 8015 for geometrical tolerancing

Test Method

Dimensional verification with CMM, hardness testing per ISO 6508, surface roughness measurement per ISO 4287, wear testing per ASTM G65

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 Head

Manufacturer profiles associated with Punch Head.

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Related Components

Mounting Interface

Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.

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Upper Tool (Punch)

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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.

Frequently Asked Questions

What is the difference between a punch head and a complete punch?

A punch head refers specifically to the working tip that contacts the material, while a complete punch includes the shank, body, and mounting features. The punch head is often replaceable in modular systems.

How often should punch heads be replaced or resharpened?

Replacement depends on material processed, production volume, and maintenance. Typically, resharpening is needed after 50,000-500,000 cycles, with complete replacement after 3-5 resharpenings or when dimensional tolerances cannot be maintained.

Can punch heads be used with different materials?

Yes, but material selection is critical. Tool steel punches work for most metals, while carbide punches are needed for abrasive materials or high-volume production. Coatings can extend life when processing corrosive materials.

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 Head