Double Step Shoulder Locating Pivot Bolt

Core Features

Double Step Shoulder Configuration – Two distinct shoulder diameters are formed along the bolt shank, providing locating and alignment functions. The shoulders engage mating component bores to maintain precise positioning and distribute loads.

Locating and Positioning Function – The shoulders serve as locating features that position components relative to each other. The step geometry provides positive positioning and alignment during assembly.

Threaded Section – The bolt incorporates a threaded section that accommodates a mating nut or threaded receptacle for securing the assembly. Thread dimensions and tolerances follow standard metric profiles.

Hexagon Head – The bolt features a hexagon head that accepts conventional sockets or wrenches, supporting torque application for tightening and removal.

Product Characteristics

The bolt is manufactured with a hexagon head, double step shoulders, and a threaded section. The shoulders are produced with defined diameters and lengths, each dimensioned to engage specific component bores. Shoulder diameter tolerances are maintained to provide the specified fit with mating components.

Thread dimensions and tolerances follow standard metric profiles. Material composition is controlled to meet specified strength requirements. Carbon steel grades are available for general applications, with material selection affecting shoulder wear resistance and strength characteristics.

Surface treatment options include zinc plating with various chromate finishes, black oxide, phosphate coating, and other finishes based on corrosion resistance requirements.

Application Scenarios

Pivot and Hinge Assemblies – Used in pivot points and hinge mechanisms where the bolt provides both rotational bearing and axial retention. The shoulders provide bearing surfaces for pivoting components.

Automotive and Machinery – Applied in automotive chassis and suspension systems where locating shoulders position components relative to each other and the bolt secures the assembly.

Mechanical Linkages – Used in mechanical linkages and actuation systems where the bolt provides a pivot point for connecting components. The shoulders maintain alignment under dynamic loading.

Industrial Equipment – Employed in equipment frames and machinery where precise positioning of components is required and the bolt provides both locating and fastening functions.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Shoulder diameters, shoulder lengths, thread size, and overall length are customizable. Material grades include carbon steel for general applications and alloy steel for enhanced strength requirements. Surface treatments are selectable according to environmental exposure conditions.

Frequently Asked Questions

Q: What is the purpose of the double step shoulder configuration?
A: The shoulders provide locating and alignment functions, engaging component bores to maintain precise positioning. The shoulders also serve as bearing surfaces that distribute loads across the mating components.

Q: What is the difference between a shoulder bolt and a standard bolt?
A: A shoulder bolt features one or more unthreaded cylindrical sections (shoulders) that provide locating, alignment, and bearing functions. A standard bolt has a fully or partially threaded shank without locating shoulders.

Q: Are these bolts removable after installation?
A: Yes. The bolt is designed for installation and removal using standard sockets or wrenches. Removal releases the shoulder engagement and allows disassembly of the joined components.

Q: What is the typical tolerance for shoulder diameters?
A: Shoulder diameters are typically maintained to tight tolerances (e.g., h7 or h8) to provide the specified fit with mating component bores.

Q: What surface treatments are available?
A: Surface treatments include zinc plating, black oxide, phosphate coating, and other finishes based on corrosion resistance requirements and environmental exposure conditions.

Installation Considerations

The bolt should be inserted with the shoulders engaging the corresponding component bores. The shoulders should provide the specified fit with the mating bores. The threaded section should align with the mating nut or threaded receptacle. Torque should be applied according to specified tightening procedures for the thread size and performance grade. The hexagon head supports torque application using standard sockets or wrenches. Shoulder surfaces should be inspected for damage or contamination before installation; damaged shoulders may affect alignment and load distribution. For plated or coated bolts, coating thickness should be within specified tolerances to maintain shoulder fit with mating bores. When used in pivot applications, the shoulders provide bearing surfaces that support rotational movement.