High rotational speed ball bearing
KOYO

Features
1-20 to 30% réduction in temperature increase
(compared with Koyo's conventional products)
Koyo has conducted various tests and analyses and de-
veloped elaborate machining techniques to improve the
performance of bearings used with machining tool spin-
dles. The resuit is a substantial réduction in frictional
heat generated in bearings rotating at a high speed.
2- 1.2-to 1.5-foid increases in speed limits
(compared with Koyo's conventional products)
Speed limits have been extended through re-designing
for high-speed rotation and heat réduction. Use of cer-
amic balls as rolling elements enables additional high-
speed rotation.
3-Improved high-speed performance achieved by
^ position preloading
Low increases in temperature during opération ensure
reduced changes in preload. Preload can be given by
position preloading even at high speeds. which has been
hitherto unavailaWe with conventional systems. The re-
suit is high-precision machining with stability.
4-Conventional bearings easily replaced
Dimensions of High Ability bearings confonm to ISO stan-
dards. Replacement of conventional bearings with High
Ability bearings requires minimal geometry changes of
the present spindle or housing.