Guide Pins: Diameter 6-50 mm, Length 50-300 mm

Component Specifications

Definition

Guide pins are cylindrical precision components used in injection molds, die-casting molds, and other tooling systems to align and guide the movement of mold halves during opening and closing cycles. They maintain accurate positioning between core and cavity plates, preventing misalignment that could cause flash, part defects, or mold damage. Typically mounted on one mold half and sliding through bushings on the opposite half, they ensure repeatable precision throughout production cycles.

Working Principle

Guide pins operate on the principle of mechanical alignment through sliding contact. During mold closure, the tapered or rounded tip of the pin engages with a corresponding bushing, guiding the mold halves into precise alignment before full closure. The cylindrical body maintains this alignment throughout the molding cycle, with lubrication reducing friction and wear. This ensures consistent part dimensions and prevents lateral forces from damaging mold components.

Materials

Typically made from hardened tool steels (AISI D2, A2, or S7), stainless steels (440C), or carbide for high-wear applications. Surface hardness ranges from 58-62 HRC with ground or polished finishes (Ra 0.4-0.8 μm) to minimize friction. May feature chrome plating or nitriding for corrosion resistance and reduced galling.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	50-300 mm
Diameter	6-50 mm
Hardness	58-62 HRC
Tolerance	h6/g6 fit
Straightness	0.01 mm/100 mm
Surface Finish	Ra 0.4-0.8 μm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 8015, DIN 6325, JIS B 0401

Parent Products

This component is used in the following industrial products

Mold Assembly

The complete mold assembly used in ceramic tile pressing machines to form tiles under high pressure.

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Interface Plate / Socket

A physical interface component providing electrical and mechanical connection points within a Test Interface Unit.

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Engineering Analysis

Risks & Mitigation

Misalignment causing flash or part defects
Wear leading to reduced precision
Corrosion in humid environments
Galling without proper lubrication
Breakage from excessive side loads

FMEA Triads

Trigger: Insufficient lubrication
Failure: Increased friction and wear, galling, seizure
Mitigation: Implement scheduled lubrication, use self-lubricating bushings, monitor temperature

Trigger: Contamination from molding materials
Failure: Abrasive wear, scoring, loss of precision
Mitigation: Install protective covers, implement regular cleaning protocols, use hardened materials

Trigger: Improper installation or alignment
Failure: Bending, breakage, accelerated bushing wear
Mitigation: Follow installation torque specifications, verify parallelism, use alignment tools during assembly

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 2768-mK for general dimensions, h6/g6 fit for sliding surfaces

Test Method

CMM measurement for dimensional accuracy, surface roughness testing per ISO 4287, hardness testing per ISO 6508

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Guide Pins

2 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

China Pogo Pin Supplier

Jiangsu, CN

Also makes: Temperature Probe, Probes, Printed Circuit Boards and 2 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “Famous brand pcb guide pins with low price”
View source page ↗ chinapogopinsupplier.com · recorded 2026-08-26

View profile Send enquiry

DGMF Mold Clamps Co., Ltd

Dongguan, Guangdong, CN

Also makes: Injection Molding Machine, Dust Collector, Manifold Block and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “guide pins”
View source page ↗ dgmfmoldclamps.com · recorded 2026-09-01

View profile Send enquiry

Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between guide pins and leader pins?

Guide pins and leader pins are often used interchangeably, but guide pins typically refer to smaller alignment components, while leader pins are larger and may carry more structural load. Both serve similar alignment functions in mold assemblies.

How often should guide pins be lubricated?

Lubrication frequency depends on cycle speed and material. For standard operations, apply high-temperature mold grease every 50,000-100,000 cycles or during scheduled maintenance. Self-lubricating bushings can extend intervals.

Can worn guide pins cause part defects?

Yes, excessive wear can cause misalignment leading to flash, uneven wall thickness, dimensional inaccuracies, and increased wear on other mold components. Regular inspection and replacement are recommended.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Guide Pins