Sleeve Vs Ball Bearing Case Fans

This is not true for ball bearing fans.

Sleeve vs ball bearing case fans.

So if the application generates low heat or has a short life span than a sleeve bearing fan can be considered. When temperatures exceeded 70 c ball bearing fans ran for 45 000 hours while sleeve bearing fans became inoperable. Fan longevity mounting noise parts lubrication issues line vs. The lifetime of a sleeve bearing fan is often shorter than that of a ball bearing fan however if the temperatures are low within the application then similar lifetime expectancy can be achieved.

A good quality sleeve bearing fan by prolimatech which has proper seals to keep the oil from vaporizing. Ball bearings fluid hydro dynamic and we ll briefly touch on magnetic bearings. Yet when the ambient temperatures were relatively low sleeve bearing fans lasted as long as ball bearing fans. Sleeve bearings work well when noise is a consideration and when the shaft load isn t high which is especially true in residential direct driven blower and condenser fan applications.

Therefore if an application generates high levels of heat an engineer may want to use a ball bearing fan. Point contact cost see at a glance comparison on page 5. Ball bearings are the best choice when the motor is under greater shaft tension or when fan speed controllers are in place. When choosing between a ball bearing and a sleeve bearing fan the engineer must consider.

Figure 3 shows what can happen to ball bearing fan noise if the fan is subjected to 40 g s 11 msec duration. Ball and sleeve bearings. This is a very important factor since the equipment. Good sleeve bearing fans can last up to 30 000 hours and even more in some cases at.

There are two main types of bearings that are used in axial fans. Sleeve bearings fans are undoubtedly cheaper compared to ball bearings ones however they have limitations regarding the mounting which must be made only horizontally to minimize friction.