Precision SKD61 & S136 Mold Core Pins | 0.005mm Concentricity & Axiality

Product Overview

SKD61 and S136 mold core pins are high-precision plastic injection mold components designed for applications requiring strict axial alignment and stable dimensional performance. With axiality controlled within 0.005 mm, these core pins ensure consistent molding accuracy and reliable demolding behavior. Senlan Precision manufactures all components under a built-to-print OEM model, strictly following customer drawings and technical specifications.

Key Features & Advantages

• Axiality controlled within 0.005 mm for high-precision molding

• SKD61 and S136 material options for strength, wear resistance, and corrosion resistance

• Stable geometry suitable for multi-cavity and high-cycle molds

• Precision machining for repeatable dimensional accuracy

• Compatible with complex core and cavity structures

• Fully customized production based on customer drawings (OEM / Built-to-Print)

Applications / Industry Use

• Plastic bottle caps and closures

• Packaging components with tight dimensional requirements

• Medical consumables and laboratory plastic parts

• Injection molds requiring high concentricity and alignment

• Multi-cavity molds for packaging and healthcare products

Mold Structure & Design Description

Core pins are critical functional elements in injection molds, responsible for forming internal geometries and maintaining alignment between mold components. For applications requiring axiality within 0.005 mm, material stability, machining accuracy, and surface integrity are essential. SKD61 provides excellent hot-work strength and toughness, while S136 offers enhanced corrosion resistance, making these core pins suitable for demanding molding environments.

Manufacturing Capability & CNC Machining

Senlan Precision manufactures high-precision mold core pins using advanced CNC machining and finishing processes. Production is supported by precision equipment from MAKINO and high-accuracy turning systems from HARDINGE.

Manufacturing processes include:

• CNC turning and milling

• Precision grinding for axiality control

• EDM processing for complex features (if required)

• Surface finishing based on mold requirements

• Dimensional inspection and axiality verification

Custom Development / OEM Cooperation Process

1. Customer submits drawings or 3D models

2. Technical review of tolerances, axiality, and material selection

3. Process planning and machining strategy definition

4. Precision manufacturing and finishing

5. In-process and final quality inspection

6. Export packaging and delivery

All parts are produced strictly under a Built-to-Print OEM manufacturing workflow.

Quality Control & Export Experience

• Incoming material inspection and traceability

• Axiality and dimensional verification during production

• Final inspection using calibrated measuring equipment

• Stable quality management procedures for export orders

• Experience supplying precision mold components to international customers

Related Products

• Precision mold core pins and sleeves

• Thread core inserts for plastic caps

• Cavity inserts for injection molds

• Multi-cavity mold components

• Customized non-standard mold parts

FAQ – Technical & Purchasing

Q1: How is axiality within 0.005 mm ensured?
Axiality is controlled through precision turning, grinding processes, and in-process measurement to maintain strict alignment tolerances.

Q2: Can I choose between SKD61 and S136?
Yes. Material selection depends on molding environment, corrosion resistance requirements, and expected service life.

Q3: Are these core pins suitable for multi-cavity molds?
Yes. Dimensional consistency and axial accuracy make them suitable for multi-cavity mold applications.

Q4: Do you support custom sizes and drawings?
Yes. All products are manufactured according to customer drawings and specifications.

Request a Quote

Please provide your drawings, material requirements, tolerance specifications, and estimated order quantity.
Our engineering team will review your request and provide a technical and commercial quotation.