Bohler M340 Core Pins for Micropipette Tips | ±pm$0.005mm Concentricity

Product Overview

M340 mold core pin ejector pins manufactured by Senlan Precision are designed for high-precision injection molds used in micropipette tip production. With concentricity controlled within ±0.005 mm, these core pins ensure stable ejection, consistent wall thickness, and reliable cavity alignment in medical and laboratory molding applications. All parts are produced strictly according to customer drawings.

Key Features & Technical Advantages

• Manufactured from M340 stainless mold steel

• Concentricity accuracy up to ±0.005 mm

• Excellent surface finish for smooth ejection performance

• High dimensional stability after heat treatment

• Suitable for ultra-thin wall and micro-feature molding

• Reliable performance in high-cavity and high-cycle molds

• Customized / OEM / Built-to-Print manufacturing

Applications & Industry Use

These M340 mold core pin ejector pins are widely applied in:

• Micropipette tip injection molds

• Medical consumable mold systems

• Laboratory plastic components molding

• Precision multi-cavity medical molds

• High-accuracy ejection mechanisms

They are especially suitable for molds requiring strict concentricity and surface quality control.

Mold Structure & Design Description

In micropipette tip molds, the mold core pin serves both forming and ejection functions. Concentricity between the core pin and cavity directly affects:

• Wall thickness uniformity

• Tip straightness

• Ejection stability

• Mold service life

Senlan Precision manufactures each core pin based on:

• Customer-provided drawings or CAD data

• Defined concentricity and tolerance requirements

• Mold structure and ejector system layout

• Assembly and alignment conditions within the mold

Manufacturing Capability & CNC Machining

Senlan Precision operates advanced CNC machining and finishing equipment from MAKINO (Japan) and HARDINGE (USA) to meet micro-precision requirements.

Our capabilities include:

• Precision CNC turning and grinding

• Fine EDM and polishing for micro features

• Controlled heat treatment for M340 steel

• Full-process tolerance management for concentricity

Each core pin is machined and inspected according to drawing specifications.

Custom Manufacturing & OEM Process

All M340 mold core pin ejector pins are produced under a Built-to-Print OEM workflow:

1. Drawing and tolerance review

2. Process and material confirmation

3. Precision machining and heat treatment

4. Concentricity and dimensional inspection

5. Final cleaning, protection, and export packaging

Prototype, spare, and production quantities are supported.

Quality Control & Export Experience

Senlan Precision maintains strict quality control for medical and laboratory mold components:

• Incoming material inspection

• In-process dimensional and concentricity checks

• Final inspection with measurement records

• Secure packaging for international shipment

Inspection reports can be provided upon request.

Related Products

• Mold core pins for medical injection molds

• Ejector pins for precision plastic molds

• Micropipette tip mold inserts

• High-precision mold cavity components

All related products are supplied on a customized / OEM / Built-to-Print basis.

Technical FAQ

Q1: Can ±0.005 mm concentricity be consistently achieved?
Yes. Concentricity is controlled through precision machining, grinding, and inspection processes.

Q2: Are these standard core pins?
No. All parts are custom-manufactured according to customer drawings.

Q3: Is M340 suitable for medical mold applications?
M340 offers good corrosion resistance, polishability, and dimensional stability for medical molds.

Q4: Can replacement pins be manufactured for existing molds?
Yes. Replacement or spare pins can be produced based on drawings or confirmed samples.

Request a Quotation

For pricing, lead time, or technical consultation on M340 mold core pin ejector pins for micropipette tip molds, please submit your drawings or specifications.
Our engineering team will provide a detailed technical review and quotation.