Angular contact ball bearings

Angular Contact Ball Bearings are also referred to as Spindle Bearings Characteristics of Angular Contact Ball Bearings Support of axial load in one direction only, Adjustment against a second bearing is necessary, Extended ball complement compared to deep groove ball bearings, High rigidity and loading capacity. Externally applied loads are transmitted from one ring to the other along a specific contact angle.

It is GMN's philosophy to offer the best possible bearing for each application. This can be achieved by adapting the angular contact ball bearings to the space available as well as increasing the operating speed of a given bearing size.

GMN's bearing series "S..." satisfies high requirements in speed liability, load capacity and stiffness. State of the art high speed cutting with continuously decreasing cutting forces call for highest speed and a constant service life of the bearings.

GMN has realized the base for these requirements by its series SM..., SH... and SMI...

An additional increase in speed can be achieved by hybrid ball bearings. With grease lubrication in particular, many spindles reach the highest processing speed at low production and maintenance costs.

Being the world wide leading producer of machine spindles, GMN knows first hand the demands in modern bearing systems.

Therefore, GMN produces separable spindle bearings and extra wide special bearings with extended grease reservoir.

Bearing Series S... GMN standard spindle bearing Non-separable type

Bearing series SM... Geometry of inner ring modified for extremely high speeds Reduced load rating and static rigidity compared to bearing series S... Equal or higher service life as with bearing series S... due to lower friction Non-separable type

Bearing series SH... A special design of series SM... Optimized oil feeding, one land on inner ring Speed coefficient n x dm = 2,4 x 106 mm/min reliably possible with cooling lubrication Non-separable type Available only on request

Bearing series SMI... A special design of series SM... Optimized for total loss lubrication and extremely high speeds, it eliminates the need for the high oil feed, seal, and cooling system complexity of an oil injection system. High degree of reliability in operation is ensured by force- feed lubrication through the shaft and the bearing inner ring. Non-separable type Available only on request

Separable type Simple mounting due to separate installation of inner and outer ring (when necessary). Balancing of rotating parts with installed inner ring A defined axial clearance of the bearing system is possible

Bearing series BHT... The cage retains the balls in the outer ring, which means the balls do not fall out when the one-land inner ring is removed. The one-piece cage is guided on both lands of the outer ring. The contact conditions are the same as with bearing series SM... Due to the ball retaining design of the cage, the ball complement is less than for bearing series SM...

Bearing series BNT... Corresponds essentially to bearing series BHT... However the contact conditions are the same as for bearing series S.... Due to the ball retaining design of the cage, the ball complement is less than for bearing series S...

Bearing series ...X and BHT ...X Non-separable type High precision ball bearings of extra wide design with shields on both sides for high speed and grease lubrication are used in drilling, milling or grinding spindles for special operating conditions. The non-contact shields form a labyrinth seal together with the recess in the inner ring.