GB5281 - 40Cr (Alloy Steel) - Grade A - Natural Color
Product Details
Product Name: Yongjing Limit Shoulder Equal-Height Screw
Technical Standard: GB5281
Product Grade: Grade A
Material: 40Cr (Alloy Steel)
Surface Treatment: Natural Color (Usually the original color after heat treatment or processes such as phosphating)
Product Type: Limit Structure with Shoulder (Flange)
Product Description
Product Overview
This product is a limit shoulder equal-height screw complying with GB5281 standard, manufactured from 40Cr alloy steel material, usually heat-treated to achieve high strength, and the surface maintains natural color (may be the original color after heat treatment or anti-rust treatment such as phosphating). Its unique design lies in the integrally formed cylindrical shoulder (flange) under the screw head. The shoulder has precise diameter and height, and its main functions are to accurately control the screwing depth of the screw, provide axial positioning, increase the bearing area and prevent over-tightening. It is suitable for precision mechanical assembly with strict requirements on installation dimensions.
Core Advantages
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Precise Depth Control: The shoulder height is precisely processed, which can strictly control the screwing depth of the screw and ensure assembly consistency.
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High Strength and Wear Resistance: 40Cr alloy steel material has high strength and good wear resistance after heat treatment.
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Increased Load-Bearing and Anti-Loosening: The shoulder provides a larger bearing area, disperses pressure, and helps prevent screw loosening.
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Simplified Assembly Process: Positioning and limiting functions can be realized without additional washers or limiting sleeves.
Applicable Industries
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Precision Machine Tools and Molds: Used in occasions that require strict control of compression depth and position, such as mold guide pillar fixation, machine tool spindle end cover, and precision fixtures.
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Aerospace Components: Parts with extremely high requirements on dimensional accuracy and reliability, such as aircraft engine accessories and avionics equipment brackets (must comply with specific material specifications).
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High-End Hydraulic and Pneumatic Components: Connections that need to accurately control the compression amount of seals and the protrusion amount of screws, such as hydraulic valve blocks and cylinder end covers.
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Robot Joints and Reducers: Parts with strict tolerance requirements on axial installation dimensions, such as robot precision reducers and joint bearing seats.
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Semiconductor Manufacturing Equipment: Fastening points that need limiting and positioning in high-precision equipment such as wafer transfer mechanisms and vacuum chamber components.
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Heavy-Duty Power Transmission Systems: Fastening that needs to bear high loads and accurately control gaps in heavy-duty equipment such as high-power gearboxes and couplings.
Warm Tips
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During installation, it is necessary to ensure that the aperture and depth of the mounting hole match the shoulder size to ensure the normal function of the limiting function.
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Since the surface is treated with natural color (non-electroplated), it is recommended to use it in a dry environment or add anti-rust measures according to needs.
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Please confirm whether the material and heat treatment state of the product meet the strength requirements according to the actual force situation.
