CNC Machined Stainless Steel Round Head Shoulder Bolts

Product overview

Round Head Shoulder Bolt is a precision shoulder bolt that integrates guiding, positioning and tightening functions, also known as square head guide pin screw. The product adopts an integrated structure of round head and shoulder: there is a finely machined shoulder collar under the head, the upper part of the shaft is a high-precision smooth guide shoulder, the lower part is processed with standard threads, and the end is square. It can simultaneously undertake sliding guidance, precise positioning and reliable locking. It is a commonly used precision fastener in molds, fixtures and automation equipment.

 

Product features

1. High-precision guide shoulder: The upper part of the shaft is a finely machined smooth shoulder with small dimensional tolerance and smooth surface. It can slide smoothly and accurately in the guide bushing, and has both unloading and guiding functions.

2. Integrated structure of round head and shoulder collar: The round head and shoulder collar under the head are integrally formed, with large pressure-bearing surface, reliable tensile strength, and smooth and beautiful appearance.

3. Square end design: The square end structure makes it easy to insert into the square hole to prevent rotation, or use special tools to hold and position it, making installation and disassembly more controllable.

4. Yellow zinc anti-corrosion coating: The surface is treated with yellow chromate zinc plating, giving it a bright golden luster, good corrosion resistance and wear resistance, and taking into account both rust prevention and appearance.

5. Precision thread section: The lower section of the shoulder is a standard precision thread with a uniform lead. It can be locked stably after being matched with the shoulder positioning to ensure the consistency of repeated assembly.

 

Application areas

Round Head Shoulder Bolt is widely used in scenarios such as the connection and guide of the discharge plate of stamping dies, the positioning components of tooling fixtures, the linear guide mechanism of automation equipment, and mechanical limit and adjustment devices. This product can be selected for any combination of "sliding guide + precise positioning + reliable locking". It is a professional fastener in the field of mold and automated manufacturing.

 

Instructions for use

1. Inspection preparation: Before use, check whether the guide shoulder is smooth, whether the thread and square head are intact, and clean the mating hole.

2. Penetration fit: Pass the bolt through the guide bush or positioning hole, so that the smooth shoulder fully contacts the mating surface and is guided in place.

3. Positioning and anti-rotation: If anti-rotation is required, fit the square structure at the end to the corresponding square hole.

4. Tighten and fix: insert a washer on the threaded end, screw on the nut (or screw it directly into the threaded hole), and tighten with a torque wrench to the specified torque.

5. Completion inspection: Confirm that the guide is smooth, the positioning is accurate, and the machine is fastened in place before putting it into use.

 

Maintenance

1. Regular inspection: Regularly check the shoulder surface for scratches and wear, and the threads for damage, and replace them in time.

2. Cleaning and lubrication: Keep the shoulders clean and apply lubricating oil to the guide parts as needed to reduce wear and strain.

3. Torque review: For components that frequently reciprocate, regularly review the tightening status and keep records.

 

FAQ

Q: What is the function of the guiding shoulder?

A: The high-precision smooth shoulder can slide in the guide bushing or positioning hole and bear lateral load. It plays the role of unloading, guiding and positioning. It is the core structure that distinguishes shouldered bolts from ordinary bolts.

 

Q:What is the use of square ends?

A: The square end can be embedded in the square hole to prevent rotation, or special tools can be used to assist positioning and disassembly to improve installation reliability.

 

Q: What are the advantages of yellow zinc coating?

A: The yellow chromate zinc plating layer has good corrosion resistance, has a bright appearance for easy inspection, and has certain wear resistance, making it suitable for molds and mechanical environments.

 

Q: Can the shoulder length and diameter be customized?

A: Yes, the shoulder diameter, length, thread specification and total length can be customized according to the drawings to adapt to the guide strokes of different molds and fixtures.

 

Q: Is it suitable for high-frequency reciprocating motion?

A:Applicable. The precision shoulder has good wear resistance after lubrication. It is a commonly used standard part in stamping die unloading and automatic reciprocating mechanisms, but the wear needs to be checked regularly.

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