Custom HRC 50 Hardened Core Pins | Precision Injection Mold Components

Product Overview

Senlan Precision manufactures OEM precision core pins with hardness up to HRC50 for injection moulding applications. Produced strictly to customer drawings (Built-to-Print), these core pins deliver stable dimensional accuracy, controlled straightness, and consistent wear resistance, making them suitable for high-cycle moulds in packaging and medical plastic production.

Key Features & Advantages

• Hardness level: Heat treated to HRC50 (or specified range per drawing)

• Precision tolerance: Controlled diameter, straightness, and concentricity

• Material options: Tool steels and stainless steels as specified (e.g. SKD61, S136, H13 equivalents)

• Wear resistance: Suitable for long production cycles and repeated ejection

• OEM / Built-to-Print: Manufactured strictly according to customer drawings

• Process stability: Consistent batch-to-batch quality for serial mould use

Applications / Industry Use

• Injection mould core and ejection systems

• Bottle cap and closure moulds

• Packaging mould components with high cycle requirements

• Medical plastic moulds requiring dimensional stability and repeatability

Mold Structure & Design Description

Precision core pins are key functional elements within injection moulds, forming internal features or supporting controlled ejection. The HRC50 hardness level improves resistance to abrasion and deformation under repeated moulding cycles. Geometry, shoulder design, tip profile, and fitting tolerances are fully defined by customer drawings to ensure correct alignment and stable mould performance.

Manufacturing Capability & CNC Machining

• Equipment: High-precision CNC machining centers from MAKINO (Japan) and HARDINGE (USA)

• Processes: CNC turning, precision grinding, heat treatment, fine finishing

• Accuracy control: Diameter, straightness, and surface finish monitored during production

• Surface condition: Machined, ground, or polished per application requirement

• Repeatability: Suitable for multi-cavity moulds and long-term production programs

Custom Development / OEM Workflow

1. Drawing & requirement review – Dimensions, tolerances, hardness, material

2. Process planning – Machining and heat treatment sequence

3. Precision manufacturing – CNC machining and controlled heat treatment

4. Inspection & verification – Dimensional and hardness checks

5. Packaging & delivery – Export-ready shipment

Quality Control & Export Experience

• Incoming material verification

• In-process dimensional inspection

• Hardness testing after heat treatment

• Final inspection records available upon request

• Extensive export experience supporting global mould manufacturers

Related Products

• Precision ejector pins

• Mold core inserts

• High-hardness mould wear parts

• Built-to-print injection mould spare components

FAQ (Technical & Purchasing)

Q1: Is HRC50 the fixed hardness level?
HRC50 is a common specification; hardness can be adjusted according to drawing requirements.

Q2: Can tight straightness or concentricity be achieved?
Yes. Precision grinding processes are applied when required by the design.

Q3: Are these standard core pins?
No. All core pins are OEM parts manufactured strictly to customer drawings.

Q4: Which industries commonly use these core pins?
They are widely used in packaging and medical injection mould applications.

Get a Quote

Provide your drawings, material specification, hardness requirement, tolerance details, and quantity. Senlan Precision will review your requirements and issue a technical quotation for OEM HRC50 precision core pin injection moulding components.