ROTARY BALL SPLINE LINEAR + ROTATIONAL MOTION COMPACT HIGH RIGIDITY ・ ・ HIGH ACCURACY HIGH SPEED ・

ROTARY BALL SPLINE SPB type STRUCTURE AND ADVANTAGES The NB rotary ball spline SPB type combines a spline nut and a set of angular contact bearings in a compact, high accurate, and high-speed rotation-capable assembly, providing both linear and rotational motion at the same time. Figure 1 Structure of SPB type PRELOAD AND CLEARANCE The amount of clearance and preload for the spline nut is expressed in terms of the clearance in the rotational direction. Three levels of preload are available: standard, lightT1 and mediumT2 , . The preload is properly adjusted by the spacer for the angular contact...

ROTARY BALL SPLINE ACCURACY The NB rotary ball spline is measured for accuracy at the points shown in Figure 2. Figure 2 Accuracy Measurement Points Note: he support area is the portion where, for example, radial bearings are attached in order to support the spline shaft. T The part attachment area is the portion to which other parts, such as gears, are attached. ④ and ⑤ indicate radial runout during rotational motion. Table 3 Tolerance of Spline Shaft Groove Torsion Max. accuracy grade The groove torsion is indicated per 100mm, arbitrarily set as the effective length of the spline shaft section....

ROTARY BALL SPLINE part number structure nominal diameter number of nuts attached to one shaft preload symbol blank: standard with special accuracy grade blank: high spline shaft total length ?SPlease refer to page P-2 for accuracy. ^Maximum revolutions for grease lubrication, please contact NB in case of oil lubrication. 930 Muirfield Drive, Hanover Park, Western Regional Office TOLL FREE: Eastern Regional Office 41 Orchard Street, Ramsey, Specifications are subject to change without notice. First Edition: April 1, 2011 Reproduction Prohibited