How to Compare Plastic Tooling Specifications for Your Production

Choosing Tooling That Fits Your Production Plan

Before approving plastic injection tooling, compare the mold materials, runner setup, dimensional tolerance, projected service life, schedule, and inspection plan. Longterm’s custom tooling information lists S50C or P20 for mold bases, 718H, 1.2738, or S136 for cavity steel, cold- or hot-runner options, a stated precision tolerance of ±0.02 mm, and mold life ranging from 50,000 to 1,000,000 shots.

Specifications to Review First

• Match the proposed mold base and cavity steel to the part design and intended production conditions.
• Check whether the runner configuration, tolerance, and expected mold life align with part requirements and projected output.
• Use the listed 25–40-day lead time and one-set MOQ as initial planning references, then confirm details for your project.
• Consider the application: Longterm identifies consumer electronics and home appliance components among its mold applications.

How to Assess the Tooling Details

Materials and runner configuration

The mold base and cavity steel are specified separately. Available base materials are S50C and P20, while the listed cavity steel choices are 718H, 1.2738, and S136. Ask the supplier to identify the material combination proposed for your design and verify that it suits the part’s requirements.

Both cold-runner and hot-runner configurations are offered. Since the product information does not set out criteria for choosing between them, include your preferred setup in the project brief and confirm the recommendation with the tooling supplier.

Tolerance, service life, and schedule

The stated precision tolerance is ±0.02 mm. Identify the dimensions that are critical to fit or assembly, and agree on how they will be measured and recorded. The listed mold life spans 50,000–1,000,000 shots, so request an estimate for the specific proposed mold rather than assuming the upper end applies to every design.

A 25–40-day delivery period and an MOQ of one set are listed. Treat the lead time as a reference and confirm the project schedule, including any design approvals or sampling stages, with the supplier.

Inspection and experience

Listed quality checks include mold trials, dimensional inspection, and a full pre-shipment inspection. Longterm also describes first-article inspection, complete dimensional measurement, and mold-running tests as part of its service checks. Confirm which inspections, reports, and sample approvals are included in your order. The company’s ISO 9001:2015 certification covers the design, manufacture, and sales of precision molds, as well as the sale of plastic products.

Longterm’s examples include a handheld-device electronic housing mold and a double-shot overmolding mold for a consumer electronics shell. Reported customer feedback mentions dimensional accuracy, surface finish, alignment, and consistent trial samples. These examples offer context about project experience, but your own part specifications still need to be reviewed individually.

Specification Comparison Checklist

Frequently Asked Questions

How should I interpret the stated mold life?

The listed range is 50,000–1,000,000 shots. Ask the supplier to state the expected life for the quoted design; the range should not be treated as a guaranteed value for every mold.

Are both hot and cold runners available?

Yes. The listed options include cold runners and hot runners. Specify your preference and confirm the final configuration with the supplier.

What quality inspections are mentioned?

The product information lists a mold trial, dimensional inspection, and a full inspection before shipment. Confirm which checks will be performed for your order and what documentation will be provided.

Recommendations Before Approval

Compare the proposed materials, runner type, ±0.02 mm tolerance, design-specific mold life, delivery schedule, and inspection scope before authorizing tooling. Longterm lists OEM custom mold making, mold making with injection molding, precision and overmold tooling, and mold development with plastic injection production among its supported business models. For technical guidance or support, contact Roger Luo at rogerluo@longterm-mold.com.

About Longterm

Longterm Manufacturing Solutions Limited is a mold manufacturer established in 2010, serving customers in the United States, Europe, Australia, and other international markets. Its services span mold design, tooling, precision machining, mold manufacturing, and parts production. The company has 50 employees and a five-engineer R&D team focused on mold and precision machining projects. Its ISO 9001:2015 certification covers precision mold design, manufacturing, and sales, and its project examples include consumer electronics, home appliances, and industrial equipment.