Timken Super Precision Bearings for Machine Tool Applications

ENGINEERING
VERTICAL SPINDLES
For vertical axis spindles, special attention must be paid to the
lubrication and sealing. Modified sealing is required to prevent the
coolant from contaminating the lubricant when the spindle nose
bearing is at the upper position (Figure 65).
In the case of grease lubrication, deflectors have to be installed to
prevent grease migration away from the bearing cavity. Alternatively,
when oil lubrication is adopted and the nose bearing is at the lower
position, a system to collect and extract the oil has to be provided
to prevent leakage (Figure 66).
A
Fig. 65. Vertical axis spindle.
Pressure
control
Fig. 66. Typical example of proper use of an oil-lubricated vertical
axis spindle with pressure control for the oil and a means to collect
and extract the oil.
TIMKEN MACHINE TOOL CATALOG 63