Stainless Steel Round Head Step Positioning Pin

Product introduction

Stainless steel round head step positioning pin is a precision mechanical component mainly used for precise positioning and connection between two or more parts to ensure the accuracy and repeatability of assembly. It uses its own cylindrical or stepped pin body to precisely match the pre-processed holes on the workpiece, effectively limiting the free movement of the connected parts in multiple directions, thereby achieving high-precision relative position fixation. This type of positioning pin is a key component in high-demand assembly scenarios such as mold manufacturing, automation equipment, and precision instruments. For applications requiring special size, structure or performance, professional stainless steel non-standard parts manufacturing factories can provide comprehensive solutions. Different from standard parts, these non-standard stainless steel parts are processed entirely according to the drawings or technical parameters provided by the customer, ensuring that the parts can perfectly adapt to specific equipment or assembly needs.

 

Product design and features

The core design of stainless steel round head step positioning pins lies in its simple structure, good neutrality, high load-bearing capacity, and the ability to withstand certain load changes and impacts.

Step structure: The pin body is designed as a combination of multiple cylinders with different diameters to form a "step". Its main purpose is to achieve the dual functions of precise positioning and reliable fixation. Usually, the smaller diameter end serves as the lead-in and precise positioning section, while the larger diameter step portion bears the main load and ensures the strength of the connection.

Round head design: The head adopts a round design, which helps to guide it smoothly during installation and prevents scratching the edge of the inner hole of the workpiece. Some high-end customized non-standard stainless steel parts will also be designed with knurling or threads (such as internal thread holes) on the round head to facilitate installation, disassembly or integration of other functions.

Various lead-in designs: In addition to the standard round head, the lead-in part can also be designed as a tapered angle according to requirements to facilitate guidance into the hole.

Various fitting methods: In order to meet different fixing requirements, the pin body can be designed as a straight rod type and pressed in with an interference fit (such as m6, p6 tolerance); countersunk holes or threads can also be designed at the end for bolt tightening. Choosing a professional stainless steel non-standard parts factory can customize the most appropriate fit and anti-loosening structure (such as adding circlips, using thread locking agents, etc.) according to specific vibration environment, disassembly frequency and other requirements.

 

Materials and application areas

These positioning pins are mainly manufactured from high-quality stainless steel to ensure critical mechanical properties and corrosion resistance. Common materials include: Austenitic stainless steel: such as SUS304 (corresponding to national standard A2 stainless steel), which has good comprehensive corrosion resistance and mechanical properties and is suitable for most general industrial environments. Martensitic stainless steel: such as SUS440C, which can obtain extremely high hardness through heat treatment (such as quenching to 33-38HRC or higher), has excellent wear resistance, and is suitable for critical positioning occasions with high wear and high strength.

 

Main application areas

Mold manufacturing industry: In stamping molds and injection molds (such as in-mold label positioning systems), they are used to ensure precise alignment between the upper and lower molds or templates, and are the core components to ensure product accuracy.

Automation and precision mechanical equipment: used for assembly and positioning of robot joints, CNC machine tool tool changers, precision transmission components and other equipment to ensure the stability and accuracy of equipment operation.

Automotive and aerospace: Indispensable in high-precision and high-reliability assembly processes such as engines, transmission systems, and fuselage structural parts.

General industrial assembly: Suitable for all occasions that require precise and repeatable positioning of components, such as high-end furniture assembly, inspection fixtures, heavy mechanical connections, etc.

When standard parts cannot meet special size, material hardness or corrosion resistance requirements, seeking custom non-standard stainless steel parts services is the ideal solution. Professional suppliers of customized non-standard screws and positioning pins can recommend or develop the most suitable materials according to specific working conditions (such as food grade, acid and alkali resistance, ultra-high and low temperature, etc.)

 

Quality control and certification system

Responsible non-standard stainless steel parts processing factories not only rely on advanced testing equipment (such as three-dimensional coordinate measuring machines, universal material testing machines, spectrometers, etc.), but also establish a complete quality system. Many factories or cooperative testing laboratories hold authoritative qualifications such as CMA (China Metrology Certification) and CNAS (China National Accreditation Service for Conformity Assessment) to ensure the credibility of test reports. Some export products may also meet international certification requirements such as European Technical Approval (ETA).

 

Customized services

For projects where standard parts cannot be used, professional manufacturers provide in-depth customized non-standard stainless steel parts services. The specific process is as follows:

Requirement communication: Customers provide target application scenarios, performance requirements (such as accuracy, strength, corrosion resistance level), preliminary drawings or samples.

Solution design and quotation: Engineers conduct analysis to determine the best materials (such as specific grades of stainless steel), heat treatment processes (such as quenching, nitriding) and surface treatment (such as hard chrome plating, polishing, passivation), and provide detailed quotations and delivery times.

Sample production and confirmation: Small batch sample production is carried out, and test reports are usually attached for customer installation verification.

Mass production and delivery: After sample confirmation, mass production will be carried out according to the agreed quantity, fully inspected, and packaged according to customer requirements (customized LOGO or packaging can be provided) before delivery.

The process of customizing non-standard screws and other special-shaped fasteners is similar to this. The key lies in early technical communication and plan confirmation.

 

FAQ

Q: What is the core function of stainless steel round head step positioning pins? How is it different from a regular dowel?

A: Its core function is to achieve high-precision mechanical positioning and reliable fixation. Its "step" design allows a single pin to simultaneously undertake positioning (precision positioning) and load-bearing functions at different levels. It has a compact structure and excellent alignment. Compared with ordinary straight positioning pins, it can more effectively prevent lateral displacement between components and has a stronger load-bearing capacity. It is especially suitable for assembly scenarios that require precise alignment and complex forces.

 

Q: Can positioning pins with very small batches or special materials be customized?

A: Yes. Many stainless steel non-standard parts factories support small batch customization, and the common minimum order quantity (MOQ) may be as low as 100 pieces. Regarding materials, in addition to the common SUS304 and 440C, we can also provide customized non-standard stainless steel parts processing services such as 316L (stronger acid and alkali resistance), 17-4PH (precipitation hardened stainless steel) or other special alloys based on demand.

 

Q: What key information do you need to provide when purchasing customized parts?

A: The more detailed information you provide, the more accurate the quotes and samples you will get. Please be sure to provide:

Detailed drawings: Label all dimensions, tolerances, geometric tolerances and roughness requirements.

Materials and treatments: Clarify the material grade, hardness requirements and surface treatment (such as passivation, nickel plating, blackening).

Application scenario: Describe the use environment (temperature, medium, vibration conditions) and stress state.

Special requirements: such as whether third-party testing reports, special packaging or labeling are required.

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