Introduction To Hydraulic Nuts

Perhaps many people have not heard of hydraulic nuts, in fact, hydraulic nuts also have their own characteristics and applications. As a professional fastener manufacturer, Xinchi Fasteners has 15 years of experience in the fastener field. We are happy to introduce the knowledge about hydraulic nuts, such as the principle, characteristics, and applications of hydraulic nuts.

Hydraulic nuts are used for bolts that need to be disassembled frequently, tightening of oversized bolts, locking of large workpieces and other occasions. And the hydraulic nut can be used as a tool for disassembling and assembling hydraulic interference connections. Installing or removing bearings on conical shafts or bushings is usually a difficult and time-consuming project. If hydraulic nuts are used, work efficiency can be improved to reduce such problems. The principle is that the hydraulic oil is input into the nut of the high-pressure oil pump to generate the force to push the piston, to meet the installation or removal of the bearing, which is effortless, accurate and safe.

The hydraulic nut is merely a piston, which is used to drive the bearing to push the conical shaft or disconnecting sleeve along the axial direction. Since the hydraulic fluid is almost incompressible, after being introduced into the nut, it will flow into the area behind the piston, allowing it to be pushed out. This pressure is used in many different mounting and dismounting methods of tapered bore bearings. The aperture of the applicable hydraulic nut is about 50mm and above.

Working principle of the hydraulic nuts

The working principle of the hydraulic nut is to use ultra-high pressure oil to generate a thrust on the shaft and tension on the sleeve so that the shaft and the sleeve are evenly connected.

There are several ways to install bearings with hydraulic nuts. Both the set sleeve and the release sleeve can be used. Larger hydraulic setting sleeves and removal sleeves (approximately size 26 and up) may also have conduits to reduce friction when mounting bearings on larger equipment. Note that the hydraulic system is in good condition, and there can be no leakage.

Characteristics of hydraulic nuts

1. The tensile mode of the hydraulic nut is not affected by the lubrication effect of the bolt and the friction size of the thread, so a more accurate bolt load can be obtained.
2. The hydraulic nut can stretch multiple bolts synchronously so that the whole circle of bolts is stressed evenly, and a balanced load is obtained.
3. Because the hydraulic nut adopts the most advanced ultra-high pressure hydraulic technology, it can complete the locking of the bolt in a very small space.
4. The residual load and payload obtained by fastening bolts through the stretching method are larger than those obtained by the torque method.
5. Tensile mode is more suitable for fastening precision requirements of higher joint applications because it can make the joint surface stress evenly to achieve joint, really prevent leakage.

Advantages of hydraulic nuts

1. Hydraulic nut is suitable for all kinds of vibration, fast rotation, large force equipment and narrow space.
2. Hydraulic nut is economical, efficient, and of light-weight, high-precision.
3. The hydraulic nut can be matched with a manual hydraulic pump, pneumatic hydraulic pump and electric hydraulic pump.
4. Multiple hydraulic nuts can be used simultaneously.
5. Without using the scale, it can directly measure the axial driving distance required by the bearing accurately and stably by the measuring ring in the structure design.
6. When installing and disassembling the withdraw sleeve, the same specification of hydraulic nut can be used, which is unable to be realized by the hydraulic nut with gage or hanging block and other patented designs.
7. The use of additional screws to disassemble nuts and replace damaged O-shapes saves time and parts costs compared with the universal design.
8. The sealed bearing can be installed and the axial force of the bearing can be determined without measuring the internal clearance of the bearing.

Applications of hydraulic nuts

1. Hydraulic nut is widely used in the metallurgical copper aluminum metal industry, paper industry, and hydraulic locking on the longitudinal shear machine.
2. The hydraulic nut can be used to install and remove the propeller, rudder tile, etc.
3. Hydraulic nuts can be used to remove high-pressure joints, such as train wheels, couplings, flywheels, and gears.

Xinchi Fastener Company is a trustworthy fastener company, especially in furniture nuts. And we are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier,  Xinchi Fastener Company can offer a wide range of high-quality fasteners, including tee nuts, screws, bolts, rivets, washers, etc. If you want to know more about fasteners or want to wholesale fasteners, please feel free to contact us. And then our experienced and expert service team will reply to you as soon as possible.