S136 Hardened Inner Rods | 48-52 HRC Precision Mold Parts for Wear Covers

Product Overview

S136 heat treated precision inner rods are manufactured for plastic injection mould applications requiring high corrosion resistance, wear stability, and precise dimensional control. With controlled heat treatment to 48–52 HRC and precision CNC machining, these inner rods are designed to function reliably as internal wear and guiding components in high-cycle mould systems.

Key Features & Technical Advantages

• Manufactured from S136 stainless mold steel

• Heat treatment hardness range: 48–52 HRC

• Excellent corrosion resistance for long-term mold operation

• High surface integrity suitable for sliding and wear interfaces

• Stable dimensional accuracy after heat treatment

• Suitable for complex inner rod geometries

• Customized / OEM / Built-to-Print manufacturing

Applications & Industry Use

These precision S136 inner rods are widely used in:

• Injection molds for bottle caps and packaging closures

• Multi-cavity molds with internal wear components

• Medical plastic moulds requiring corrosion-resistant materials

• High-cycle molds where consistent internal alignment is required

They are especially suitable for molds exposed to moisture, cleaning agents, or long production runs.

Mold Structure & Design Description

In injection mold assemblies, S136 inner rods are typically used as:

• Internal guiding or supporting rods for top wear cover structures

• Precision wear components inside core or cavity systems

• Replaceable internal mold parts subject to repeated movement

• Functional elements requiring both hardness and corrosion resistance

All components are produced strictly according to customer-provided drawings to ensure compatibility with existing mold structures.

Manufacturing Capability & CNC Machining

Senlan Precision operates advanced CNC machining systems to ensure consistent accuracy and surface quality.
Our facility is equipped with high-precision machining centers from MAKINO (Japan) and HARDINGE (USA), supporting:

• Precision CNC milling and turning

• Controlled machining before and after heat treatment

• Tight tolerance control for inner rod components

• Stable surface finishes suitable for wear interfaces

Heat treatment and machining processes are carefully coordinated to minimize distortion and maintain dimensional stability.

Custom Manufacturing & OEM Process

We provide full customized and OEM manufacturing services, including:

• Built-to-Print production based on 2D / 3D drawings

• Heat treatment process control per specification

• Prototype, small batch, and serial production support

• Technical review prior to manufacturing

All production is executed according to confirmed drawings and technical requirements.

Quality Control & Export Experience

With long-term experience supplying precision mold components to international customers, Senlan Precision follows structured quality control procedures:

• Incoming material inspection and traceability

• In-process dimensional inspection

• Hardness verification after heat treatment

• Final inspection prior to shipment

Inspection reports and measurement records can be provided upon request.

Related Precision Mold Components

• Mold core pins and cavity inserts

• Wear-resistant inner rods and sleeves

• Heat treated stainless mold components

• Customized injection mold spare parts

All related products are available on a custom manufacturing basis.

Technical FAQ

Q1: Is this inner rod produced only according to drawings?
Yes. All S136 inner rods are manufactured strictly based on customer drawings.

Q2: Why choose S136 material for inner rods?
S136 offers excellent corrosion resistance and stable hardness, making it suitable for long-cycle injection molds.

Q3: Can the hardness range be adjusted?
Yes. Heat treatment parameters can be adjusted according to drawing or technical requirements.

Q4: Are small quantity or trial orders accepted?
Yes. Prototype, small batch, and repeat orders are supported.

Request a Quotation

For pricing, lead time, or technical consultation regarding S136 heat treated precision inner rods for injection moulds, please submit your drawings or specifications.
Our engineering team will review your requirements and provide a detailed quotation.