NTN - Precision Rolling Bearings

NTN Main Spindle Bearings
9 Ultra high speed double row cylindrical roller bearings NN30HSRT6 type
NN30HSRT6 ultra high speed double row cylindrical
roller bearings have higher operating speed with the
same level of rigidity and capacity as the conventional
series.
Bearing design
Features
1. Optimized internal design to realize high speed and
low temperature rise.
2. Molded PEEK cage is used for high speed under
grease & air-oil lubrication and grease life.
Fig. 10.4 NN30HSRT6 type
Permissible speed range
dmn value 10 6 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
NN30HSRT6
Grease lubrication
Air-oil lubrication
Notes) Permissible speed of each bearing (dmn value) varies depending on the specifications of the machine for which the bearing is used (motor drive
system, cooling system, and construction around the bearing). Consider the optimal choice referring to the above guideline and contact NTN.
Cage design
Cage is made of PEEK which is very light and strong.
(Photo 10.1)
Smaller deformation by the centrifugal force is
realized by the lighten cage material and unproved
design High speed operation is by the cage design
improvement. Grease life is extended by grease pocket
in the cage.
Photo 10.1 PEEK cage
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