Carbon Steel Two-Step Cylindrical Locating Pin Shaft

Core Features

Two-Step Stepped Shaft Configuration – Two distinct diameter sections are formed along the pin length, enabling engagement with components having different bore diameters. The stepped profile supports accurate positioning of layered components and assemblies with varying bore sizes, allowing a single pin to locate either two different bores or two layers of workpieces as one.

Cylindrical Profile with Locating Function – The pin provides precise positional reference for workpiece positioning relative to fixture or assembly components. Locating diameters are maintained with defined tolerances to provide the specified fit with mating components.

Carbon Steel Construction – Manufactured from carbon steel with material composition controlled to meet specified strength and wear resistance requirements. Material grades are selectable based on application requirements.

Round Head Configuration – The head is formed with a round profile and features a tapered tip for guided insertion into locating bores.

Product Characteristics

The pin is manufactured with a two-step shaft profile, with each section dimensioned to engage specific component bores. The locating diameters are maintained with defined tolerances, typically 0/-0.01 mm for the head diameter and g6 tolerance for the shank diameter. The stepped design positions the pin relative to the fixture or workpiece, supporting consistent alignment and positioning accuracy.

The two-step configuration is particularly suited for applications involving multiple stacked sheet metal panels or components with different bore sizes. The pin provides accurate location from hole-to-hole on the workpiece.

Material composition is controlled to meet specified strength requirements. Carbon steel grades are available for general applications, with material selection affecting pin strength and wear resistance. Heat treatment processes may be applied to achieve defined hardness for wear resistance in high-cycle applications.

Surface treatment options include zinc plating, black oxide, phosphate coating, and other finishes based on application requirements.

Application Scenarios

Jig and Fixture Assembly – Applied in assembly jigs and fixtures where precise workpiece positioning is required. The two-step locating pin provides accurate positioning for components with different bore diameters, reducing the need for multiple pin sizes.

Sheet Metal Panel Alignment – Used where multiple layers of sheet metal require accurate alignment. The two-step design allows positioning of two layers of workpieces simultaneously, commonly used in sheet metal assemblies.

Inspection and Gauging – Employed in inspection jigs and gauging fixtures where precise positioning of the workpiece relative to measurement equipment is required.

Automotive Assembly – Used in vehicle manufacturing applications where stepped locating pins provide accurate positioning of components during assembly operations.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Positioning side outer diameter (P), mounted side outer diameter (D), positioning part length (B), mounting section length (L), and taper length (E) are configurable. Material grades include carbon steel for general applications and stainless steel for corrosion-resistant requirements. Surface treatments are selectable according to environmental exposure conditions, including zinc plating, black oxide, and phosphate coating.

Frequently Asked Questions

Q: What is the purpose of the two-step configuration on this locating pin?
A: The two-step shaft provides engagement with components having different bore diameters or allows positioning of two layers of workpieces simultaneously. Each step engages a specific component interface, supporting consistent assembly alignment and positioning accuracy.

Q: What is the typical tolerance for locating pin diameters?
A: Locating diameters typically hold a tolerance of 0/-0.01 mm for head diameter and g6 tolerance for shank diameter specifications.

Q: What materials are available for locating pins?
A: Material grades include carbon steel for general applications, alloy tool steel equivalents (such as O1 tool steel) for hardened applications, and stainless steel (304 grade) for corrosion-resistant applications.

Q: What surface treatments are available?
A: Surface treatments include zinc plating, black oxide, phosphate coating, and hard chrome plating.

Q: Are these pins suitable for automated assembly applications?
A: Yes. The round head with tapered tip design supports guided insertion into locating bores, making the pin suitable for use in automated or manual assembly applications.

Installation Considerations

The pin should be positioned with the stepped sections engaging the corresponding component bores. The locating pin is typically inserted into the locating hole with the tapered tip providing guidance during insertion. The head seats against the workpiece surface when fully inserted. The locating diameters provide the specified fit with the mating bores.

For applications requiring frequent insertion and removal, the pin material hardness and surface finish should be selected based on cycle requirements. For plated or coated pins, coating thickness should be within specified tolerances to maintain fit with mating components. When used in assemblies with stacked components, the two-step configuration maintains alignment between layers without requiring separate locating components.