Crossarm Pin
Powertel is an insulator pin manufacturer, we can supply you with short shank cross arm pin, long shank cross arm pin and pole top pin for insulators all over the world.
Crossarm pins are components of cross arms in transmission line systems.
The structure that holds and supports the overhead power lines, is called crossarms. Crossarm pins are used to hold crossarms together while preventing them from moving. They can be found on both crossarms and a single cross-arm.
Crossarm pins are mainly used in transmission lines. It is used to connect crossarms, thereby joining the crossarms. By joining crossarms together, they are made stronger and more resistant to vibration.
They are attached in cross arms of overhead transmission lines for supporting and connecting the crossarms by means other than welding.
They join two crossarms or a cross arm with an insulator mounted on it. It is also put into one crossarm for joining cross arms together.
The cross arm pins have three parts – the crossarm pin base, a crossarm pin body, and the crossarm pinhead. The cross-arm pin base is fitted in an opening of a cross arm.
The cross-arm pin body connects the cross arm with another cross arm or a crossarm insulator.
The crossarm pinhead is placed on the top end of the cross-arm pin body and holds it into position so that it cannot move outwards.
Crossarm pins are usually made of steel or aluminum. They are sometimes coated with zinc galvanization as it protects them from rusting in humid.
| Catalog Number | S | A | B | T | D | Washer Dim. (Sq. Inches) | Weight/100 (lbs) |
| CAP-1 | 5/8 | 6 | 7-1/2 | 3-1/4 | 2 | 2 | 200 |
| CAP-2 | 5/8 | 5 | 8 | 4 | 2 | 1-3/4 (round) | 157 |
| CAP-3 | 3/4 | 6 | 8 | 4-1/2 | 2 | 2-1/4 | 276 |
| CAP-4 | 3/4 | 6 | 6-1/2 | 3-1/4 | 2 | 2-1/4 | 232 |
| CAP-5 | 5/8 | 6 | 6-1/2 | 3 | 2 | 2 | 153 |
| CAP-6 | 5/8 | 6 | 6-1/2 | 3 | 2 | 2 | 151 |
| CAP-7 | 5/8 | 6 | 5-3/4 | 2-3/4 | 2 | 2 | 147 |
| CAP-8 | 5/8 | 5 | 6-1/2 | 4 | 2 | 2 | 144 |
| CAP-9 | 5/8 | 5 | 5-3/4 | 4 | 2 | 2 | 138 |
Crossarm Pin- The Complete Guide
Crossarms are common features on the transmission lines. They are used for holding or supporting other important parts and accessories onto the pole or even tower. But, how do the crossarms stay stable in one position? This is where the crossarm pins come in.
What is a crossarm pin?
The cross arm pin joins cross arms together. The cross-arm pin base is fitted in a cross-arm hole of one cross arm and the crossarm pinhead is placed on top of the cross-arm pin body to hold it into position so that they cannot move outwards.
Types of crossarm pins
In transmission line systems, there are three types of cross arm pins: single cross-arm cross-arm pin, cross arm cross-arm pin with cross-arm joint, and cross arm cross-arm pin with cross arm insulator cross-arm joint.
In transmission line systems, there are four types of cross arm pins: single cross-arm pin, high voltage crossarm pin, clamp type cross arm pin, and angle crossarm pin.
Single cross-arm cross arm pins
The single cross-arm cross arm is fitted between two cross arms or a single cross arm having an insulator mounted on it. It is made of aluminum.
It is fixed by cross-arm pin base into crossarm hole and cross-arm pinhead on the cross-arm pin body holds it in position so that they cannot move outwards.
High-voltage crossarm pin:
The cross-arm pins are used in cross arms of transmission lines. The cross arm pins for high voltage crossarms and low voltage crossarms are made differently.
It is important to identify the cross-arm pin type before installation because their installation methods differ considerably.
Pins used at higher voltages must be kept properly tightened when they are installed so as to ensure that crossarms do not vibrate due to crossarm pins loosening up later.
Clamp type crossarm pin:
This type of crossarm pin uses the clamping mechanism to hold cross-arm pin base in crossarm hole. It is used for low voltage crossarms because it can be fitted easily. It is made of aluminum.
Angle crossarm pins:
This cross-arm pin can be fitted on a single cross arm or cross-arms of overhead transmission lines. Angle cross arm pins are made of aluminum or steel.
It can be easily installed as there is no need for cross-arm hole drilling.
Advantages of crossarm pins
1> They enable building a transmission line system that can resist winds up to 110 mph.
2> In cross arms of towers with crossarm pins, the weight is distributed equally so they are sturdy and capable of withstanding high winds.
3> They offer crossarms more strength to hold up the electrical transmission line wires that cross them. The crossarm pins are thick as compared to crossarm insulators, which means more strength.
4> The crossarm pins are easy to replace if they are broken or if they need maintenance. They typically last 25-50 years, and then they are replaced with a new cross arm pin.
5> Their bases may be bolted on to crossarms by means of nuts, bolts and washers that prevent them from falling off crossarms.
Conclusion
In conclusion, cross-arm pins are integral parts of any transmission line. They give the crossarm all the required support. Ensure that you buy quality crossarm pins for your project. Also, verify that it is the right type of pin for the application.