







Introducing the Stop Bolt: A premier mechanical fastener celebrated for its unique structure and unparalleled function, making it an essential component in molds and precision equipment. Let’s delve into its intricate details and explore its superior capabilities:
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1. Core Structural Design and Features
Innovative Shoulder Design: Featuring a cylindrical shoulder meticulously positioned between the head and the screw, this design allows the bolt to snugly fit the fastened component, achieving exceptional precision in positioning and reliable stopping power.
Material Excellence and Performance: Crafted from SCM435 alloy steel, boasting a hardness of 33-38HRC, this bolt offers an impressive blend of high toughness, wear resistance, and heat resistance, ideal for demanding high-temperature environments.
• Enhanced Coordination: When paired with bolt pull rods, it expertly controls the mold opening stroke at the parting surface through seamless threaded connections, effectively optimizing mold design to be more compact.
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2. Functions and Their Impact
• Precise Positioning and Stopping: The shoulder design ensures an unyielding fixation of component positions, preventing any movement deviation. Perfectly suited for applications demanding precision, such as the fixed mold seat plate and flow channel push plate in the three-plate mold.
Vibration Resistance & Stability: By engaging directly and mechanically, bypassing reliance on friction, the bolt dramatically enhances connection reliability and vibration resistance.
• Thermal Deformation Management: Skillfully mitigates deformation due to thermal expansion in high-temperature molds, thereby significantly prolonging mold life.
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3. Versatile Application Scenarios
In mold manufacturing, it adeptly governs the opening stroke of three-plate molds, streamlining the mold structure and facilitating miniaturization.
Mechanical Transmission: Essential for transmission devices in automotive and aerospace industries, where high-precision positioning is crucial.
High-temperature Environments: Its exceptional heat resistance ensures suitability for challenging scenarios like metallurgy and injection molding.
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4. Comprehensive Usage Guidelines
Selection and Compatibility: Select specifications based on material, load, and aperture needs, with thread length typically 1.5 times the diameter.
Installation Essentials:
Countersunk hole depth must comply with: W=S (stroke)+shoulder thickness K+2mm;
Utilize a torque wrench to manage preload force, avoiding over-tightening or loosening;
Ensure threads are cleaned and lubricated pre-installation to prevent locking.
Quality Assurance: Confirm thread connection gauge accuracy, and verify secure fastening post-installation.
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5. Distinction from Standard Bolts
• Expanded Functionality: Merging both positioning and fastening capabilities, unlike ordinary bolts which solely provide fastening.
Structural Innovation: The unique shoulder design facilitates mechanical stopping, setting it apart from conventional bolts.
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In Summary
With their distinctive shaft shoulder structure and robust material properties, shoulder bolts adeptly meet positioning, vibration resistance, and high-temperature demands in precision equipment. As indispensable components in molds and high-precision machinery, their design harmonizes function and reliability, emphasizing the need for strict installation adherence to unlock peak performance.