Removable Eye Bolt Anchor,Tri Head Bolt Socket,Bolt Anchor Spacer

The first step in using bolts is to design the strength and material properties of bolts according to the service environment. When a bolt is installed, it can be reused. However, the fact is that when a bolt is reused many times, you will find that its strength will decrease.

This process is called attenuation of Flat Head Bolt torque. [Removable Eye Bolt Anchor]This situation of lower and lower strength is the most common phenomenon in automobile bolts. We have tracked and understood the use of automobile bolts for a long time, and analyzed and filed the causes and process of strength attenuation in detail.

Can we solve the problem of intensity attenuation?

[Tri Head Bolt Socket]Through experiments, we can further optimize the material properties of the Flat Head Bolt by heat treatment, accurately calculate its maximum friction coefficient and the bite length of the thread, and the accuracy of heat treatment time and temperature to a certain range, to solve the problem of bolt torque attenuation.

Usually, when the automobile bolt is used for two to three years, we will find that its attenuation can reach the range of 20%. For the strength design of the Flat Head Bolt, if the upper and lower range of torque parameters exceeds 25%, it is a defective product and can not be used at all.

One reason for this strength reduction is that the length of thread locking is either too long or too short. Second, the diameter of the bolt head is too small, and the contact area does not reach a reasonable range, resulting in the instability of the friction coefficient. Third, the change in the material properties of the bolt itself exceeds the estimated range. Fourth, the reason for the unreasonable design of accessories.

How to rectify the problem?

• If the reason is the length of the thread, replace the thread with a reasonable length. 

However, sometimes, the standard range and design parameters of Flat Head Bolts do not match completely. [Bolt Anchor Spacer]To save procurement time and cost, the length of these threads will be ignored, thinking that a little longer or a little shorter will not have any impact. We should still consider the importance of quality. We would rather increase the cost a little and produce according to the design drawings instead of using standard parts.

• If the friction strength is insufficient due to the small diameter of the head of the bolt, the drawing needs to be redesigned, and a large number of experiments need to be carried out. 

It can be used safely only when it is determined that there is no problem. The diameter of the Flat Head Bolt head has a certain relationship with the installation environment. If a standard bolt cannot be put into its hole, it can only redesign the relevant size of the bolt. If there are changes in size and performance, it is necessary to record the reasons for the size change and the time of first use.

For such a Cross Threaded Bolt, we should know it well and track and observe its changes at any time, The time for replacing bolts should also be adjusted, which must be shorter than that in a conventional environment. The change of friction coefficient is not only related to the size of the contact area but also related to the force of thread locking and the types and standards of nut matching. To make up for the low friction coefficient of bolts, we can improve the nut matching. For example, lock nuts can be used to match such Cross Threaded Bolts.

• If the material performance of the bolt is unstable, we can replace the bolt with a higher level of material and use it.

If conditions permit if the original design Cross Threaded Bolt is grade 6.8, but the performance of this grade bolt is found to be unstable, we can replace the grade 8.8 bolt for use. Although the material of the grade 8.8 bolt is a little more expensive than that of the grade 6.8 bolt, the use cost and maintenance cost are much lower. According to comprehensive calculation, the final application cost is not much higher.

Therefore, whether it is a small Cross Threaded Bolt or a product as big as a car, we need to work together to make them better.

We are the Tri Head Removable Eye Bolt Socket Anchor Spacer, if you are looking for a Flat Head Bolt, welcome to contact us.