Ball Screws, Trapeziodal Screws and Lead Screws Precision Screws Built for Optimized Performance, Repeatability and Stiffness www.thomsonlinear.com A REGAL REXNORD BRAND

Thomson – the Choice for Optimized Motion Solutions Often the ideal design solution is not about finding the fastest, sturdiest, most accurate or even the least expensive option. Rather, the ideal solution is the optimal balance of performance, life and cost. Quickly Configure the Optimal Mechanical Motion Solution Thomson has several advantages that makes us the supplier of choice for motion control technology. • Thomson owns the broadest standard product offering of mechanical motion technologies in the industry. • Modified versions of standard product or white sheet design solutions are routine...

Precision Screws

Satisfying The Diversity Of Needs For Ball Screw Actuation The basic technology of ball screw actuation is simple. And yet, the great diversity of demands made on ball screws requires a corresponding breadth in both product offerings and technical expertise in application. Challenges facing machine designers include: • Meeting stringent time and cost demands Having the flexibility to meet shorter delivery times is often accompanied by increasing pressure to keep costs down. With a wide range of pre-stocked ball screws and drives, Thomson is has decades of manufacturing expertise and the associated...

Precision Screws Thomson Ball Screws – The Optimal Solution For Your Linear Motion Applications Thomson is the world's leading manufacturer of ball screws. These products are used in some of the most demanding applications, including machine tools, handling machinery, technical devices used in medical and aviation markets. Our wide product range is bound to contain the right drive for almost any motion task: from small custom thread drives for highly sensitive medical devices to ball screws for high-performance machine tools with stringent speed and stiffness requirements. We strive to provide...

Ball Screws Thomson ball screws are ideal for many technological and mechanical engineering applications. These include: The balls, which roll between the screw shaft and the nut, offer optimum levels of efficiency (up to 98%). As a result, ball screws, unlike trapezoidal screws, are not capable of self locking. Machine tools Aircraft construction Wood working Handling equipment, industrial robots Printing and paper machines Traffic engineering Medical equipment Measuring technology A ball screw is a driving element for converting rotary motion into axial motion and vice versa. A ball screw consists...

Precision Screws Ball Screws – Technical Data Manufacturing process Thomson recirculating ball screws are manufactured in rolled, ground and whirled versions. Both shaft and nut have a gothic arc profile. The load angle is 45°. All ball screws are designed for ambient temperatures between -30°C and 80°C, and temperatures up to 110°C are also permitted for intermittent operations. Ball screws are only conditionally suited for temperatures below freezing. Speeds The permissible speed limit is currently 3000 rpm, and up to 4500 rpm for spot measurements. This speed limit identifies the maximum speed...

Standard Manufacturing Program Ball Screw Type vs Nominal Diameter and Lead Availability • Rolled O Ground/Whirled A Heavy Duty Ground/Whirled (load capacity up to 1500 kN dynamic / 6000 kN static) Precision drives us The Thomson ball screw range complies with DIN 69051 and ISO 3408. All ball nuts, both flanged and cylindrical, are available with connections complying with DIN specifications. Every shaft can be supplied with customized end journals, and upon request, customers can order screws with an annealed end for machining their own end journal.

Precision Screws Rolled Ball Screws Thread rolling manufacturing Rolled ball screw shafts are manufactured by cold forming without chip removal. In this procedure, the bar stock is given a ball track in a continuous process. This means that it is, in principle, possible to create leads of any amount and to form any number of threads on the ball screw shaft. The shafts are then heat treated and polished. The forming process ensures high strength and a good surface finish for the ball screw shafts. Rolled ball screw shafts and the associated standard nuts can be supplied directly from stock at...

Type and tolerance class

Precision Screws Ball Nuts – Return Systems Thomson offers a wide breadth of ball nut configurations to seamlessly interface to the application. Most ball nuts have profiled wiper rings to reduce the escape of lubricant and prevent the ingress of dirt. Ball Nut Mounting Alternatives Thomson offers flanged ball nuts that are attached via a set of mounting holes or cylindrical nuts that have a keyway or external thread. Custom interfaces such as trunnions and nut housings are also available. Ball Recirculation Systems Thomson manufactures ball nuts with three different ball recirculation systems...

Preloading If the ball nut unit is preloaded on the ball screw, the following results can be achieved: • Increased positioning accuracy • Increased stiffness in the nut area • Reduced width of backlash Preloading with 2-point ball contact: Standard preloading force: 10% of dynamic rated load Designs: • VDM preloaded double nut • EM-2 and FL preloaded single nut with internal thread shift V • EM-2 preloaded single nut with internal thread shift between V individual threads (only where there is more than one thread) Preloading with 4-point ball contact: Standard preloading force: 4% of dynamic...

Precision Screws Preloading Ball nut units – preloaded As a rule all nuts can be combined to form backlash-free, preloaded nut units except when the lead is equal to or greater than the diameter of the screw. Thomson supplies ready-to-install units with “O” preloading. O preloading: With this type of preloading, the lines of forces run in a rhomboidal pattern (O-shaped), i.e. the nuts are pressed apart by the preloading force. This configuration offers particularly high rigidity against tilting. The standard preloading is equal to 10% of the dynamic load rating C. Note: Backlash-free preloading...