Model: Z-42150.
Type: Z-type coupling (right-angle bracket).
Nominal breaking load: 420 kN.
Material: Hot-dip galvanized steel, stainless steel closing pin.
Weight: Approximately 2.5 kg.
Plate width: 42 mm.
Connection hole diameter: 22 mm (accepts M22 bolts).
Dimensions: 150 mm (height) × 42 mm (width) × 30 mm (thickness).
Applications: Right-angle connections of insulator strings and securing cable terminals to frames in 35 kV-110 kV transmission lines.
What Problems Might Occur With Z-42150 Clevis During Use?
Cracks and Fractures
Long-term use and exposure to alternating loads can cause fatigue cracks, and continued use can lead to fractures.
Deformation
This often occurs in high-temperature environments, where high temperatures cause the material to degrade, and combined with sustained loads, can lead to plastic deformation.
Electrochemical Corrosion
When Z-42150 Clevis comes into contact with other metals, corrosion is accelerated at the contact point, with the zinc layer acting as an anode and corroding preferentially.
The Z-42150 Clevis has a breaking load of up to 420kN and is equipped with M42-grade high-strength bolts with a shank diameter of approximately 39.7mm. It is compatible with national standard bowl-head brackets and insulator strings and is suitable for higher voltage transmission lines, especially overhead transmission lines of 220kV and above.
The Z-42150 Clevis has a breaking load of up to 420kN and is equipped with M42-grade high-strength bolts with a shank diameter of approximately 39.7mm. It is compatible with national standard bowl-head brackets and insulator strings and is suitable for higher voltage transmission lines, especially overhead transmission lines of 220kV and above. The Z-42150 Clevis is the preferred choice. Its zinc coating thickness of ≥86μm makes it suitable for use in highly corrosive environments. It is particularly effective in ultra-high voltage environments, connecting large-section conductors to insulator strings on ±800kV DC and 1000kV AC line tension towers. It is suitable for combined loads in heavy icing and strong winds.
Can the Z-42150 Clevis be used in low-temperature environments? Let's use a low-temperature environment of -40°C as an example:
Generally speaking, steel's yield strength and tensile strength increase at low temperatures, while its elongation and reduction of area decrease, leading to a greater risk of fracture. Since -40°C is significantly lower than ambient temperature, we do not recommend using Z-42150 Clevis.
However, given the cladding's excellent performance, if you intend to use it in a -40°C environment, you can choose low-temperature-resistant alloy structural steel, such as 35CrMo. This steel has been heat-treated to achieve a higher fatigue limit.
Installation of the Z-42150 Clevis is actually very simple, but many users report a common problem during installation: eccentric loading. This can cause localized stresses to far exceed the design value, leading to cracks, deformation, and even breakage. How can this be avoided?
Clearly define the direction of force: The bracket's two right angles correspond to the longitudinal loading direction and the transverse fixing direction, respectively. Check the flatness of the connecting surfaces of the matching hardware. If any protrusions or deformations are present, repair them promptly.
Three-dimensional alignment: Horizontal deviation is ≤0.5°, vertical deviation is 90°±0.5°, and axis alignment is required to prevent eccentric bolt loading due to misaligned holes.
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