Precision spindle with low friction

摘要

The invention refers to precision spindle unit for low friction performance, having a tubular housing (3) surrounding a shaft (1) a first locating rolling bearing (4) mounted on the shaft, a fixed locking washer (9) with a flange (9a), engaging the inner race ring of the first rolling bearing (4), to arrest this axially against a shoulder (2) on the shaft, a second rolling bearing (6) in the housing (3) having a loose fit on the shaft, a second locking washer (8) fitted to the shaft, a resilient member (7) provided between the second locking washer (8) and the inner race ring of the second bearing (6), facing outwards, a shoulder (5) projecting inwards inwardly in the housing, against which shoulder the side of the inwardly directed outer race ring of the second rolling bearing (6) is engaging, whereby the second bearing (6) by influence from the resilient member (7) is biased between the resilient member (7) and the first inwardly facing shoulder (5) in the housing, the locking washers (8,9) to define a slot seal (10) at each axial side of the housing, whereby each one of the first and the second rolling bearings (4, 6), at their outwardly facing sides are provided with an integral seal (11). IMAGE