Cablecraft Linkage Technical/Application Data Cablecraft Motion Control’s (CMC) engineering staff possesses the expertise to provide advice and guidelines regarding nearly all motion transmission applications. There are several factors pertaining to engineering application, including correct installation, that should be taken into consideration to insure optimum performance of your chosen linkage components. When mounting ball studs, the hex mounting portion should be properly tightened and flat against its mating surface. Adequate countersinks, counterbores or washers may be necessary to provide a tight, flush joint. Installation torque values for tightening must be within the capacity of the linkage component or breakage may occur from over-tightening. Consult CMC’s engineering staff or refer to an appropriate engineering standard for mounting nut torque values associated with each grade of threaded fastener.Looseness in the threaded joint or mounting surface may cause abnormal wear and early failure of the linkage component. When mounting rod ends, care should be used in tightening a fastener against the ball to prevent distortion.The same torque requirements that apply to threaded fasteners also apply to securing the rod end spherical ball. The plated ball may become chipped or distorted by excessive clamping pressure, resulting in increased torque, wear, and premature failure of the rod end. In applications involving vibration where loosening of the linkage components may occur, self-locking nuts or lockwashers should be used to secure the components and prevent loosening. Looseness in the threaded joint or mounting surface may cause abnormal wear and early failure of the linkage component. Ball joints and rod end bearings should be mounted in such a way as to best utilize the design of the joint with respect to gravitational force. For example, a ball joint should be mounted with the housing member on top of the ball stud. Mounting the housing component with it’s weight and linkage hanging from the ball or ball stud could accelerate wear and lead to detachment of linkage components and sudden loss of control. It is recommended that a separate stop be incorporated in the linkage system to eliminate the possibility of exceeding the misalignment capability of the ball joint or rod end bearing. An overtravel condition of this type may result in breakage and detachment of the ball joint or rod end components and sudden loss of control. CMC ball joints and rod end bearings are manufactured to commercial standards. If you have questions concerning a particular product for your application, CMC can offer assistance; however, it is the end user’s responsibility to determine if the chosen part is suitable for a specific application (especially true where safety is a factor). To determine a part’s useful life for a particular application, you should test sample parts under actual operating conditions. Ultimate Radial Static Load Capacity (Rod Ends) These loads are the maximum amount of force the part can sustain before complete failure. All loads listed in the catalog are based on rod ends without grease fittings. Due to the removal of material for the fitting, the load rating for such a part is substantially lower. Consult CMC engineering for assistance on these parts. Radial Static Load Capacity (Spherical Bearings) These loads are the maximum amount of force the part can sustain before a 2% permanent set occurs in the part.Consult CMC engineering if these numbers don’t fit your application. Static Limit Load (Spherical Bearings) Static limit load is the allowable load that can be applied to a bearing without adversely affecting its performance capabilities. iBejnuoft Cablecraft Motion Controls

Calculations for Misalignment of Rod Ends & Spherical Bearings B = Bore of ball C = Chamfer on outer race D = Head diameter or diameter of outer race E = Ball diameter H = Housing width S = Shoulder diameter (neck ball) V= W = Ball width The angle of misalignment in a rod end is controlled by the outside diameter of the head. The maximum degree of misalignment is obtained when the head contacts the side of the fork or clevis in which it is mounted. The angle of misalignment in a spherical bearing is calculated somewhat differently from that of the rod end because the housing is not spherical....

Dimensions in Inches THREAD OD N P N P Rod Ends/Ball Joints: Specifying Tips Each of our products are specifically designed to perform in even the most extreme conditions. Through this technical guide and the advice of our sales and engineering staff, our goal is to help you identify the most appropriate Cablecraft product suited to your application. First, a few key considerations... While the applications are almost limitless, the conditions that the different linkages witness are often very similar. When designing a linkage solution, keep in mind everything from environmental conditions (humidity,...

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