What is the difference between an adapter sleeve bearing and a withdrawal sleeve?

adapter sleeve bearing is one of the commonly used bearing accessories. It is the most commonly used part when the bearing with tapered hole is positioned on the cylindrical shaft, because this sleeve can be used for the optical axis or the stepped shaft. Many people may not know the adapter sleeve bearing well. Let's talk about how to install the adapter sleeve bearing correctly. What is the difference between an adapter sleeve and a withdrawal sleeve?

How to install the adapter sleeve bearing correctly?

(1) Preparation before installation

Before installing, carefully clean the installation surface of the adapter sleeve and the withdrawal sleeve. There must be no sharp corners or burrs. If there are protrusions, they should be polished with professional sandpaper in time to avoid mutual wear between the bearing and the shaft. Affecting the assembly accuracy, all the friction surfaces passing on the shaft must be coated with butter.

After the adapter sleeve bearing and the withdrawal sleeve are finished to the standard, the inner diameter and outer diameter are floating dimensions under the influence of the gravity of the material and a small amount of stress of the material. Sometimes the floating diameter of the inner diameter is greater than the standard size, which does not affect the assembly. However, when the floating size is less than the standard size, the assembly should be placed on the support block at the opening to control the size of the inner hole to be greater than the standard size before assembly. When the adapter sleeve bearing and the withdrawal sleeve are initially installed to the predetermined position, the supporting block at the opening must be removed to perform the locking assembly work.

Note: Select the appropriate adapter sleeve bearing according to the bearing. There are many types of adapter sleeves on the market, and the prices vary depending on the model and brand. If the adapter sleeve needs to be replaced, it must be selected according to the model size and brand of the bearing. The adapter sleeves bought in this way are suitable for use, and there is no problem that the adapter sleeves wear out and stick to each other. For detailed parameters of the adapter sleeve, please consult Luoyang Bearings.

(2) Installation steps

1. The inner diameter, outer diameter, screw thread of the adapter sleeve and withdrawal sleeve, and the big end face of the withdrawal sleeve are coated with butter.

2. The adapter sleeve or the withdrawal sleeve and the bearing are assembled into one body, and the preliminary lock is made with a lock nut or a hydraulic nut, and the end face (one oil hole of the adapter sleeve and two oil holes of the withdrawal sleeve) is injected with high-pressure oil by a hand oil pump .

3. Use the lock nut to lock to adjust the bearing clearance. After the clearance is adjusted, directly lock or use the hydraulic nut to install the bearing. The clearance needs to be adjusted. Remove the hydraulic nut and lock it with the lock nut.

(3) Disassembly steps

1. When unloading the adapter sleeve bearing and the withdrawal sleeve, grease the threads on the adapter sleeve and the withdrawal sleeve with butter. Grease the end surface where the nut is removed and the bearing contacts.

2. Inject the high-pressure oil into the oil hole of the end face of the adapter sleeve bearing or withdrawal sleeve of the hand oil pump. Under the action of the high-pressure oil, forcefully rotate the disassembly nut or hydraulic nut to pressurize the adapter sleeve and withdrawal sleeve to withdraw. (The removal of the adapter sleeve requires a threaded mounting nut at the shaft end as a fixing point)

What is the difference between an adapter sleeve and a withdrawal sleeve?

Adapter sleeves and withdrawal sleeves are generally suitable for large bearings. The adapter sleeve is used to tighten the round nut and tighten the bearing, and the withdrawal sleeve is opposite.

The original intention of the adapter sleeve bearing and the withdrawal sleeve is to facilitate the installation and disassembly of the bearing, improve the efficiency, and reduce the maintenance cost of the machine. In layman's terms, the adapter sleeve is used for easy installation, and the withdrawal sleeve is used for convenient removal. And the use of withdrawal sleeves and adapter sleeves can achieve the effect of adjusting the internal clearance.

The adapter sleeve bearing is convenient for adjusting the axial positioning of the bearing, and has good self-locking. The use of the optical axis avoids the stress concentration phenomenon of the stepped shaft, which is beneficial to heavy-duty transmission or occasions with impact vibration.

Although the structure of this type of adapter sleeve bearing device is simple, it can only achieve satisfactory results under the premise of correct installation and maintenance. Otherwise, it will be too fast or even counterproductive.

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