Among the various types of screws available for different applications, the ball screw is especially selected for medical and laboratory applications for its better efficiency, superior precision, reduced noise performance capability, higher bearing load capability, and wide availability of options.
Ball screws are continuously being utilized and preferred by many laboratory and medical machines and equipment all over the world. Here are the reasons why ball screws are selected over other screw types:
A ball screw is essentially made up of a screw that is driven by a motor, a nut, and a ball recirculation tool. The balls simply make a smooth straight line rolling motion between the shaft of the screws and the nut, achieving about 90 percent efficiency, which is relatively higher than other screws. This technology results in higher efficiency and makes ball screws a preferred choice for laboratory and medical applications compared to other screw types that rely on sliding which causes a lot of friction and lower efficiency. In fact, the driving torque needed to roll the balls is only a third of a lead screw that depends on sliding.
Medical and laboratory equipment need to be highly reliable and accurate. Since ball screws act in a rolling motion, movement of the screw is smoother, more defined, and more precise. The arrangement of the parts of the screw is also done in such a way that it minimizes mechanical wear and tear, reducing the need for ball screw repair without sacrificing reliability.
Reduced noise performance capability
Since the ball screws feature smooth rolling movement, there is no need to make use of large motors to drive the screw. Smaller motors can handle the job, producing a more quiet activity that is perfect for medical and laboratory applications. The flexible feature of ball screws also makes the most efficient nut design that helps reduce noise when applied.
Higher bearing load capability
Despite their reduced sizes, ball screws are still able to carry out higher loads. This allows manufacturers to design smaller ball screw constructions that are especially needed for smaller equipment and instruments suited for medical and laboratory applications.
Wide availability of options
The final reason why balls screws are preferred for laboratory and medical applications is that rolled balls now come in diameters that range from 6mm to 16mm with leads that range from 2 to 12.7. Other than for medical purposes, ball screws are also available with a diameter of up to 63mm and leads of up to 50mm. For inch dimensions, ball screws are available starting at ¼ inch in diameter with leads starting from 0.100 inch to 1 inch. Some other choices available also include the length of the screw, preload nuts, various materials, and other special construction.
Even though ball screws are more costly for other applications, they are definitely worth the price for medical and laboratory applications that are more concerned about efficiency, accuracy, reliability, and performance. In the long run, you will be able to save more on screw repairs and maintenance.