Improve reliability, simplify maintenance and reduce environmental impact
To meet increasing performance requirements for high-speed precision applications, SKF has developed
a new ultra-precision bearing lubrication unit that available for oil and gas lubrication in high-speed
applications. This system simplifies new spindle designs and can improve the performance of existing
designs.
This efficient solution improves lubricant flow, reduces heat generated by bearing friction, and allows
bearings to operate at speeds up to approximately 250 -3 million ndm. While reducing operating
temperatures and improving oil and gas lubricant flow, it also reduces oil consumption and noise
levels. The solution also reduces oil consumption and noise levels.
Advantages of oil-air lubrication:
The speed at which a bearing reaches its operating temperature limit depends first and foremost
on the heat generated by the bearing and the heat that can be removed from the bearing. In order
to reduce frictional heat especially in the bearing, this can be achieved by ensuring that the required
components are supplied with the exact amount of lubricant at the right time. Many high-speed
applications applications can be lubricated by grease. However, as operating temperatures and the
resulting frictional heat increase, grease is often replaced by oil lubrication systems. The grease is
often replaced by an oil lubrication system.
Very high-speed applications often require a precise lubricant delivery system: an oil-air lubrication
system can continuously deliver a precise amount of lubricant to the bearing to be lubricated. to
the bearings that need to be lubricated, thereby minimizing friction and operating temperatures.
Oil-air lubrication systems offer the following advantages:
Increase of the reachable speed of the bearings
Reduced frictional torque and energy consumption
Reduced environmental impact
Reduced lubricant consumption
Maximized lubrication effectiveness
Moderate pressure in the bearing housing prevents the ingress of contaminants
Lower Operating Temperature
SKF conducted a temperature rise test comparing the Ultra Precision Bearing Lubrication Unit with
other commonly used similar products. High-speed test results show that the Ultra precision bearing
lubrication unit can reduce operating temperatures by 10-15%.
Ultra-precision bearing lubrication units extend bearing life and increase operating speed for
high-speed operating applications such as machining centers, milling machines, internal ring
grinders, and spindles where spindle drilling for printed circuit boards is required.
This unit runs on high speed spindles with an oil and gas lubrication system in both horizontal
and vertical positions.
The SKF ultra-precision bearing lubrication unit consists of a set of precision paired spacers
and an ultra-precision high-speed single-row angular contact ball bearing with a 15° or 18°
contact angle. contact ball bearing (belonging to the 70.... E series/ISO 10 diameter series).
Suitable shaft diameters range from 30 to 70 mm.
All-steel bearings with balls made of steel rings and bearing grade silicon nitride and hybrid
ceramic bearings are available. Since silicon nitride (ceramic) bearing balls are much lighter
and stiffer than steel balls, hybrid ceramic bearings can provide higher rigidity and much
faster rotation than all-steel bearings.
SKF Ultra Precision Bearing Lubrication Units are designed for the following 70.... E
series bearing configurations:
A single general purpose paired bearingSingle or tandem configurations with spring preload, back-to-back configurations with
compact preload.