Date: 2013-08-01

SKF Ball Screws Cut Linear Motion Costs

SKF Ball Screws Cut Linear Motion Costs

Available with nominal diameters from 50mm to 125mm, the latest high load capacity ball screws from SKF provide dependable and cost-effective solutions in a wide range of linear motion applications. In many cases, they can be used as a superior alternative to hydraulic actuators, eliminating the need for expensive, inconvenient and environmentally unfriendly hydraulic power packs.

For low-load applications, SKF offers type SD and BD miniature ball screws, which can be supplied in diameters ranging from 8mm to 16mm. With leads from 2mm to 5mm, these products have static load ratings from 2.5kN up to 10.5kN. All types feature a cylindrical nut with a threaded end to ensure easy mounting, and all combine smooth running and good back-driving characteristics, with high efficiency and excellent positional accuracy and repeatability.

Type SD ball screws offer limited axial play, while type BD units use oversize stainless steel balls to eliminate completely the effects of backlash. The ball screws are corrosion resistant, and all sizes can be supplied with optional wipers.

For applications involving heavier loads, SD and BD miniature ball screws are complemented by SKF's SX and BX universal ball screws, which are available with static load ratings from 24.4kN to 243.5kN, and nominal diameters from 20mm to 63mm. The 20mm diameter units have a lead of 5mm, while the remaining sizes can be supplied with either 5mm or 10mm lead.

As standard, SX universal screws with axial play and BX backlash-free universal screws are fitted with composite inserts. They are, however, also available to special order with steel inserts, which can act as a safety device for particularly demanding applications, or where the ball screw is installed vertically.

To simplify assembly, SX and BX ball screws have slim cylindrical bodies. They feature a convenient lubrication hole which can be used for a grease nipple, or as a coupling point for SKF's SYSTEM 24 automatic lubrication system. For maximum corrosion resistance, the ball screw shaft can be phosphated on request, and wipers are available as an option.

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