Precision H13 Cavity & Core Sleeves

Product Overview

Senlan Precision supplies high-precision core inserts manufactured from 1.2372 (D2) die steel for plastic thread core applications. Designed for demanding dimensional control, these inserts achieve up to 0.003 mm tolerance on critical features. All parts are produced strictly under OEM / Built-to-Print requirements for injection mould assemblies.

Key Features & Technical Advantages

• 1.2372 (D2) cold-work die steel with excellent wear resistance

• Achievable precision on functional areas: ±0.003 mm (application-dependent)

• High hardness and edge stability for threaded core geometry

• Stable performance under repetitive mould opening/closing cycles

• Precision turning, milling, and grinding for concentricity and thread accuracy

• Fully customized geometry—no standard catalogue limitations

Application Scenarios / Industry Applications

• Plastic bottle cap and closure thread cores

• Multi-cavity injection moulds for packaging components

• Medical plastic moulds requiring stable thread dimensions

• High-cycle moulds with tight tolerance requirements

• Precision mould tooling for daily packaging products

Mold Structure & Design Description

The core insert forms the internal thread profile of plastic parts and directly influences assembly torque and sealing performance. Using 1.2372 die steel ensures high wear resistance and dimensional stability. Precision machining and grinding control concentricity, roundness, and thread pitch accuracy, supporting consistent moulding performance throughout extended production runs.

Manufacturing Capability & CNC Machining Capacity

Senlan Precision operates advanced machining systems for high-accuracy mould components:

• MAKINO high-precision CNC milling centers (Japan)

• HARDINGE CNC lathes (USA)

• Precision CNC turning, milling, surface grinding, and profile grinding

• Controlled heat treatment coordination for 1.2372 steel

Typical achievable tolerances range from ±0.002–0.005 mm, depending on geometry and inspection method.

Custom Development / OEM Cooperation Process

1. Drawing and technical requirement review

2. Material and heat-treatment specification confirmation

3. Machining route and tolerance feasibility analysis

4. CNC machining, grinding, and thread profiling

5. Final inspection, packing, and export shipment

All production follows Built-to-Print OEM workflows with full drawing compliance.

Quality Control & Export Experience

• Incoming raw material verification and traceability

• In-process inspection of critical thread and locating dimensions

• Final dimensional inspection (roundness, concentricity, pitch accuracy)

• Quality management aligned with packaging and medical mould standards

• Stable export experience supporting international mould manufacturers

Related Products Recommendation

• Threaded core inserts and core sleeves

• Mold cavity and core pins

• Wear-resistant inserts for multi-cavity moulds

• Precision mould spare parts

FAQ – Technical & Procurement

Q1: Is 0.003 mm tolerance achievable on all features?
Critical functional areas can reach 0.003 mm; final tolerance depends on geometry and inspection requirements.

Q2: Why choose 1.2372 steel for thread core inserts?
1.2372 offers high wear resistance and dimensional stability for threaded mould applications.

Q3: Do you manufacture only threaded inserts?
No. Other mould core, cavity, and structural inserts can be produced under the same OEM process.

Q4: Are small-batch or prototype orders supported?
Yes. Prototype, pilot, and production volumes are all supported.

Q5: Can surface treatments be added?
Optional surface treatments can be discussed based on mould operating conditions.

Get a Quote

For pricing, lead time, or technical evaluation of 0.003 mm precision 1.2372 die steel core inserts, please contact Senlan Precision with your drawings. Our engineering team will provide a detailed quotation and manufacturability feedback.