![]() Spacer ring shifting the threads of the nutĥ. Preload achieved by an external force on nut/screwģ. Also durability decreases with increasing preload. The disadvantage of preload is greater wear. Nuts are mounted on the screw with a free play or as preloaded – to eliminate any free play. It mostly depends on the manufacturer and the effort to achieve the best possible coefficient of rotation (d1 * nmax). Ball circulation may be designed in several ways. Ball screw nutsĭepending on the design, nuts are designed with an external ball guide (noisier, more balls in circulation) or with an internal ball guide. This category includes a number of ball screws such as profileless screws (the shaft is in the form of a ground hardened rod), screws with a cage (balls are in a cage without a converter, smooth run, short strokes), telescopic (several ball screws joined (screwed-in) together, small spacial installation requirements), etc. Manufactured by rolling, rounding, accuracy IT5, IT7, IT10. Low positioning accuracy, lower speed, low price, no preload. Manufactured by grinding – for higher accuracy (IT1), with no preload. Greater load capacity is achieved by a larger ball diameter, a higher number of threads and profile modification. Usually multi-start threads High load ball screwsĭesigned for high loads and long life. ![]() Machining, positioning, Accuracy IT1, IT3, preload is used. High speed ball screwsĭesigned for high positioning speeds (up to 30 m/min – work speed, up to 80 m/min – high speed). Most of the calculations in the program are Nuts may be preloaded, or without any preload. BS are usually manufactured in IT1-IT5 accuracy classes. Depending on the degree of accuracy, they are produced by grinding or rounding. Universal screws used in machining centers, aircraft technology, automotive technology, positioning equipment, etc. +90%), the disadvantage is the absence of a self-locking feature.īall screws may be divided according to type as follows: Ball screws Standard ball screws The advantage of BS is high efficiency of the movement transfer (approx. They are used, for example, as drives for CNC machines, injection molding machines, replacement for hydraulic drives, medical devices, aviation and automotive technology, transport technology. The project" can be found in the documentīall screws (BS) have a wide range of uses. Information on the purpose, use and control of the paragraph " Information on Information on the syntax and control of the calculation can be found in the The calculation is based on data, procedures and algorithms from specialized literature and AGMA, ISO, DIN and BS standards. The program contains tables of screws according to ISO and ANSI Lubrication proposal and efficiency calculationĨ. Tensile/Pressure, thrust, bend, buckling and critical revolutionsħ. Service life calculation, tolerances, temperature analysisĦ. Load spectrum table definition (speed, torque, revolutions and power output.)ĥ. Detailed analysis (load, dimensions, parameter check)ģ. Preliminary design (minimum input parameters – sufficient to navigate and select from catalogs)Ģ. It is used to solve the following tasks:ġ. ![]() This program (algorithm) is used to design, calculate and check ball screws. Buckling, tension, compresion, torsion, critical speed.MITcalc - Ball screws, design, calculation and check Ball screws Table of Content:
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