A range of of Rockford Ball Screws are available today. The Rockford Ball Screw can be purchased in one of three options – free wheeling, preloaded and keyway ballnut screws. All editions of Rockford ball screw are different in terms of function and appearance, although eacn design is fundamentally a ball screw. Therefore there are recirculated ball bearings, that cause the nut to move when the screw turns, unless the screw is being back-driven.

The preloaded Rockford Ball Screw has two ball nut assemblies and a rolled thread ball screw. This is a specialised design because usually there would be only one ball nut on a ball screw. Preloading is possible because the ball bearings encased in the nut are placed on one side of the screw only, for each set of ball bearings. This is done with the assistance of spring packs. Preloaded Rockford ball screws are less accurate than standard ball screws but cost less. Two ball nuts equates to a slightly larger friction measurement and effects the load capacity slightly but detrimentally.

A second Rockford ball screw approach is the free wheeling ball screw assembly. The unique feature with this apparatus is that it has a ball cage inside the nut. Using this apparatus the ball nut can be restricted to a certain area on the screw making use of stop pins. The efficiency is not detrimentally affected despite the ball cage, however a difference exists between the actual lead of the screw and its effective lead. Hence the circular motion of the screw does not give position information. The keyway ball nut screw is yet another Rockford ball screw that can be ordered from the manufacturers.

ball screw repair

Thompson Ball Screws are manufactured using one of two approaches. Ball Screws can be made using rolling or grinding. The rolling methods means taking molds and filling them with steel to make the correct shape, and the grinding approach focuses on making thread profiles and leads with a high level of precision.

As is typical of ball screws, a Thompson Ball Screw is extremely efficient, with at minimum ninety percent efficiency and occasionally ninety-eight percent efficiency. They are also very accurate, a direct result of the manufacturing and engineering skills available in the company. When selecting a Thompson Ball Screw there are many sizes available to choose from. The smallest option is 3/8 inch, while the largest is 4 inches. Every effort is made to make sure that every Thompson Ball Screw is as straight as possible . Those components of the ball screw that have been manufactured by machine have a straightness of .005 inch per foot, while the cut ball screw parts are straight up to .01 inch per foot.

If you prefer metric measurements, Thompson Ball Screws can size your sets for you in your preferred units, for the diameter and the lead. Thompson Ball Screw leads range from is from 0.125 inch to 2 inches. The accuracy ranges of the leads are from 0.0003 to 0.1 inch per foot, and changes depending on ball screw. Each Thompson Ball Screw can be customised in terms of finishing, or using standard end machining.

NSK is the principal ball screw producer internationally at the moment. There is a conscious emphasis on reducing friction and, this firm makes a selection of ball screws, which can accommodate most needs. NSK Ball Screws are available in all sizes, from minute to large. You can buy an NSK Ball Screw for the majority of situations, for example for mechanisms that create LCDs and semiconductors, together with machine tools and general machinery.
NSK Ball Screws can be ordered according to a certain design. A primary option is the BSS Series, a design that allows the assembly to be operated at very fast speeds while keeping noise output low. These are minimalistic ball screws which are manufactured to meet specifications where the ball screw assembly has to operate at high speeds, where low friction is essential. Another option of NSK Ball Screw is the TW Series, that is manufactured to work in Twin-Drive Systems. Yet another variation is the HTF-SRC Series NSK Ball Screws, that can accommodate fast movements and strong loads. You can expect minimal noise output from these ball screws. Other ranges of NSK Ball Screws include mechanisms that have additional dust protection (the V1 Series), as well as assemblies specialised for use in the Mold Clamping Systems in Injection Molding Machinery. This variation of NSK Ball Screw is known as the HTF-SRD Series, which includes a new design for moving the ball bearings in a constant cycle. This allows the ball screw assembly to work at a greater speed and with a larger load. Other NSK Ball Screws have been created to function in a vacuum space, incorporating a thin film lubrication technology.