One of the key factors when it comes to proper torque is to ensure that proper guidelines for the lubrication of the fastener are followed. There are certain tests that have shown that close to 90% of the torque that is used to fasten bolts can be used in overcoming friction. Following the lubrication guidelines of the manufacturer has therefore become quite important in ensuring that there is proper tension as well bolt stretching. For instance, where a bolt of 1 is selected for a particular joint, the bolt load or tension load of that joint is considered to be up to 28,300 pounds of force that is needed to secure joints. If you are trying to achieve the force, you will need to apply a torque of 620 ft for every lbs. This should be applied without any lubrication.
In case a moly-based lubricant is applied on the thread, this can result in the over-tensioning of the bolt and this can cause the immediate failure of the bolt.
Tension tips
The hydraulic bolt tensioners have for many years being used in the wind industry. These have also become common and this has led to various bolting application for the construction/maintenance of wind turbines. The basic operations are usually the same as those of the hydraulic torque wrenches because both requires more pressure to be applied on the tension and this will result in more bolt load. The measure unit for the bolt tension or bolt load is commonly expressed in kn or pounds. The pressure that operates the tension and range from 10,000 up to 22,000 psi. The figure can even rise higher in some cases. The main part of the tension usually consist of a socket that is used to tighten nut after tension has been achieved, a bridge on which the cylinder rests or load cell rests on and a puller bar that gets attached to stud. For your entire electrical hydraulic pump, you should get in touch with Hydraulic SAIVS.
No comments:
Post a Comment