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Spindle bearings are a special type of single-row angular contact ball bearings. They are often used in the manufacturing of machine tools, as well as in the range of applications with high to extremely high demands in terms of accuracy or permissible speed required by the mounting/ bearing installation.
In comparison with standard angular contact ball bearings, spindle bearings are distinguished by the contact angle, the tolerance classes, and the cage design. Spindle bearings can be delivered with a contact angle of 15° or 25°.
Spindle bearing BS series
The BS719 and BS70 series use a larger number of smaller diameter balls than the B719 and B70 series with identical external dimensions. As a result, higher speeds can be achieved compared to the standard series. The BS series represents a high-performance bearing concept for demanding spindle units that is economical for the customer.
In their main dimensions, high-speed spindle bearings are identical to spindle bearings in the B series. They are particularly characterized by their suitability for higher speeds, as well as by lower friction and heat build-up, and are manufactured in the HS719 and HS70 series.
QJ218-N2-MA belongs to a four-point contact ball bearing. It has an inner diameter of 90mm, an outer diameter of 160mm, a thickness of 30mm, a single-row bearing with locating grooves, a solid brass cage and an outer ring guide.
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