Cylindrical Coupling Nuts

A cylindrical coupling nut is a mechanical fastener with a cylindrical profile. It has a precise internal thread that can be tightly fitted to bolts or screws of the appropriate size to ensure a tight connection between two or more components. In the connection between the screw and the chute box of a lathe, the long nut can precisely adjust the position of the chute box by cooperating with the screw. Due to its longer length, it can provide more stable axial support to prevent the slide box from shifting due to vibration or axial force during the working process, thus ensuring the machining accuracy of the machine tool. Cylindrical long nuts are also used in some large hardware products or small equipment that require long nuts to hold them in place. For example, in the assembly of large metal display racks, industrial shelves, etc., long nuts can be used to connect columns and beams, providing a solid connection and facilitating positional adjustment during installation.

Primary Functions

• Threaded Joint: Screwing two rods into the same nut from opposite ends
• Length Extension: Providing additional length when the original rod is insufficient
• Structural Connection: Creating a secure axial connection in construction and machinery

 

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Application Scenario 1：Construction Industry-Extending Steel Structure Tie Rods

In steel structure workshops, bridges, curtain walls, and similar projects, extra-long tie rods are frequently required. However, a single rod cannot be infinitely long, and transportation becomes impractical.

Therefore, construction teams employ this method:

1. Prepare two shorter threaded rods
2. Screw them together using a cylindrical coupling nut in the middle
3. This creates a longer tie rod

Functions:

• Extends length
• Ensures coaxial alignment (more stable under load)
• Allows for fine-tuning of preload

Application Scenario 2：Mechanical Equipment-Lead Screw Adjustment Mechanism

For example, a common linear adjustment mechanism in automated equipment:

The left side features one lead screw. The right side features another lead screw. Connected by a coupling nut in the middle

When the motor drives one lead screw to rotate, the entire mechanism's length changes

Thus achieving:

1. Height adjustment of lifting platforms
2. Opening and closing of fixtures
3. Fine-tuning of positioning mechanisms

Features:

• Cylindrical nuts are more suitable than hex nuts for installation in confined spaces
• High coaxiality ensures smoother operation

Application Scenario 3：Extension of Ground Anchor Bolts for Solar Mounting Structures

During photovoltaic power plant installations, ground anchor bolts (the type driven into the ground) sometimes prove insufficient in length.

Installation crews will:

1. Screw a cylindrical connecting nut onto the top of the ground anchor bolt
2. Then attach a section of threaded rod
3. This allows for adjusting the mounting structure height or compensating for construction tolerances

Functions:

• Quick extension
• Facilitates on-site adjustments
• Low cost, high reliability

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