±pm$0.005mm Tolerance Core Pins | H13 (SKD61) Ejector Pins for Medical Molds

Product Overview

SKD61 and SKD51 high precision mold core pins and ejector pins are manufactured for plastic injection molds used in medical and laboratory applications. Produced under strict dimensional control, these pins achieve tolerances down to 0.005 mm, ensuring stable demolding performance, accurate part geometry, and reliable operation in high-cycle injection molding environments.

Key Features & Technical Advantages

• Manufactured from SKD61 or SKD51 tool steel

• Precision tolerance control up to ±0.005 mm

• High hardness and thermal stability for long mold life

• Consistent concentricity and straightness

• Suitable for high-frequency medical molding applications

• Fully custom-made according to customer drawings

Applications & Industry Use

• Medical plastic injection molds

• Syringe and disposable medical component molds

• Laboratory consumable molds

• Multi-cavity precision injection molds

• High-accuracy ejector and core pin systems

Mold Structure & Design Description

Core pins and ejector pins are critical functional components responsible for cavity formation and controlled demolding. SKD61 / SKD51 materials provide excellent heat resistance and mechanical strength. All dimensions, tolerances, and surface finishes are strictly manufactured according to approved drawings to ensure compatibility with existing mold assemblies.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision is equipped with advanced machining resources, including:

• High-precision machining centers from MAKINO (Japan)

• CNC turning and milling machines from HARDINGE (USA)

• Precision grinding for straightness and concentricity control

• Achievable machining accuracy up to ±0.002 mm

Each pin undergoes multi-stage machining and inspection to maintain dimensional stability.

Custom Development & OEM Cooperation Process

1. Receipt of customer drawings or 3D CAD files

2. Engineering feasibility and tolerance evaluation

3. Material selection and heat treatment confirmation

4. Precision CNC machining and grinding

5. Dimensional inspection and quality verification

6. Final approval and batch production

All products follow a Built-to-Print / OEM manufacturing model.

Quality Control & Export Experience

• Incoming material certification and inspection

• In-process dimensional measurement

• Straightness and concentricity verification

• Final inspection before shipment

• Extensive export experience serving international mold manufacturers

Inspection reports and measurement records are available upon request.

Related Products

• Precision mold cavity inserts

• Custom ejector pin sets

• Core pins for medical and laboratory molds

• High-tolerance EDM and CNC machined mold components

FAQ (Technical & Purchasing)

Q1: Are these core pins available in standard sizes?
A: No. All core pins and ejector pins are custom-manufactured according to customer drawings.

Q2: Why choose SKD61 or SKD51 material?
A: These materials offer excellent heat resistance, hardness stability, and wear resistance for precision injection molding.

Q3: What tolerance can be reliably achieved?
A: Typical tolerance is ±0.005 mm, with tighter control available depending on geometry.

Q4: Can these pins be used in multi-cavity molds?
A: Yes. They are suitable for multi-cavity and high-output injection molds.

Get a Quote

Please submit your technical drawings or specifications to receive a professional evaluation and quotation for custom SKD61 / SKD51 precision mold core pins and ejector pins.