-->

BALL BEARING
S type (balls and rings: bearing steel)

S type (balls and rings: bearing steel)
H type (balls: silicon nitride, Si3N4/rings: bearing steel) :
These ball bearings are designed for motorized and non-motorized spindles and feature the optimal internal structure for minimizing heat generation and improving seizure resistance. The H type can be lubricated with grease at speeds where conventional bearings require Oil-Air lubrication. Additionally, both the S type and H type are capable of speeds 20% higher than conventional precision angular contact ball bearings.


Cylindrical roller bearings (CRBs) have high load-carrying capacity because of the linear contact between their rollers and raceways. They are capable of high running speeds because of their relatively small friction coefficient and they offer advantages in maintenance because they are more easily disassembled, inspected and reassembled. Furthermore, they allow the free setup of their axial clearance. However, ordinary CRBs require another bearing to handle axial loads, increasing the number of parts required for supporting the axle journal. Usually, the axial loads are borne by a single-row radial ball bearing such as a deep groove ball bearing or an angular contact ball bearing installed between the bearing box front cover and the axle end. To absorb axial loads, a rubber buffer or a coned disc spring is placed between the ball bearing’s outer ring and the bearing box front cover. Sealing is provided by a seal between the rear cover and the bearing box. In Japan, bearings of this type of construction have long been used and referred to as “journal box type” bearings. For conventional rolling stock, bearing boxes containing a double-row cylindrical roller bearing for radial loads and an angular contact ball bearing with a rubber buffer for axial loads have been used for many years. Initially for Shinkansen trains, bearing boxes essentially identical to the conventional type were employed, although the combination of an angular contact ball bearing and a rubber buffer was replaced early on by a deep groove ball bearing and a coned disc spring.

Single Row Deep Groove Ball bearings are another group of products commonly used in electric motors. NSK is a world leader in bearing sealing technology and can provide deep groove Ball bearings with shields or seals (contact or non-contact) on one or both sides and pre-lubricated with grease. Specifically designed for electric motor applications, NSK bearings with special ‘CM’ clearances and reduced ‘E’ noise
class facilitate a smooth, quiet operation and improved efficiency.

|Ball bearing|ball bearing|

Ball bearings