HIGH PRECISION MINIATURE BALL SCREWS

HIGH PRECISION MINIATURE BALL SCREWS We have been manufacturing ball screws since 1967 and we deliver them almost all over the world. To provide our customers with the highest quality of the products and co-operation, we keep investing a lot of effort in continuous improvement. Thanks to this effort, every year we fight for the top positions in the leading innovative competitions. A certificate of quality in compliance with EN ISO 9001:2008 proves that our quality management system Association of Engineering Technology Brno Regional Chamber of Commerce is at a high level. We also aim for maximum...

HIGH PRECISION MINIATURE BALL SCREWS Miniature ball screws (from diameter 5 mm with pitch 0,5 mm) are structural elements, which transmit rotary movement to straight movement with high efficiency (approximately 94 - 97%). They feature high rigidity, accuracy, durability and especially high precision positioning in compact dimensions. Micro ball screws consist of ball shaft, ball nut both with ground thread, and its recirculation system as the standard ball screws. Characteristics of the Micro Screws: High precision positioning screws Very high running smoothness Delivered with required preloading...

HIGH PRECISION MINIATURE BALL SCREWS I Micro #Y Screw 1. Application and use Ground miniature ball screws are used where high accuracy and precision are required, e.g. in robotic surgery, medical devices and the aerospace industry - see table of Application and use below:

HIGH PRECISION MINIATURE BALL SCREWS Accuracy and quality of the miniature ball screws are largely dependent GROUND BALL SCREW THREAD on the manufacturing technology. Miniature ball screws are produced by grinding technology only. on efficiency, it is necessary to make BALL SCREW PROFILE To achieve the maximum transmissi- an ideal profile of the ball screw thread. The profile is not made of one radius but two radii with offset (so called gothic arch, see picture on the left). This profile shape offers an ideal efficiency to load capacity (ratings) ratio of the ball screw. A PRELOADED NUT WITHOUT FLANGE...

HIGH PRECISION MINIATURE BALL SCREWS External ball recirculation BALL SCREW RECIRCULATION SYSTEM with beds Version marking: IN Maximum speed coefficient: Version marking: with shims Internal ball recirculation EX Maximum speed coefficient: Nuts and the shaft are hardened to 50-60 HRC. Minimum shaft strength Rm = 800 MPa. The final quality is tested by long term durability tests follwed by the Steel: Cf53 analysis of the functional parts of the transmission assembly when the specified wear limits are achieved. P0 THREAD PITCH ACCURACY CLASS SPECIFICATION 3,5 Pitch tolerance on the thread

HIGH PRECISION MINIATURE BALL SCREWS Micro mm Screw 3. Main dimensions Miniature ball screws are produced from diameter 5 mm, length 60 mm, pitch 0,5 mm up to diameter 16 mm, length 1000 mm and pitch 10 mm. All variants are listed in the table below: SHAFT MAXIMUM LENGTH [mm]

HIGH PRECISION MINIATURE BALL SCREWS I Micro #Y Screw 4. Accuracy Class Specification Miniature ball screws are produced according to the ISO 3408 standard. Below you can find basic permissible deviations and geometric tolerances in accordance with standard tolerance grade P0, P1 and P3. Table 1: Travel deviations per reference length PERMISSIBLE TRAVEL VARIATION v pu [pm] SHAFT NOMINAL DIAMETER [mm] Table 2: Radial run-out bearing seat related to the centerline of screw groove and radial run-out of journal diameter related to the bearing seat.

HIGH PRECISION MINIATURE BALL SCREWS Micro mm Screw Table 3: Axial run-out of shaft (bearing) face related to the centerline of the bearing seat. SHAFT NOMINAL DIAMETER [mm]

HIGH PRECISION MINIATURE BALL SCREWS KSK is a sought-after partner for precision machine tool manufacturers worldwide. You will get this position thanks to its reliability, excellent quality and smart selection. • The up-to-date catalogue version is always available on the company website in section Downloads. • General terms and conditions as well as operating conditions can be found on the company website in section Downloads. • Most of the used calculations are based on the ISO 3408 standard dealing with ball screws. • Due to continuous technical development within our company, the technical...

HEADQUARTER & PRODUCTION PLANT KSK Precise Motion, a.s. Blanenska 1277/37 664 34 Kurim Czech Republic Phone: +420 533 033 710 Email: [email protected]