Steinmeyer STA Rolled Ball Screw Dives
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ROLLED BALL SCREWS – THE ALTERNATIVE IN LINEAR TECHNOLOGY Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.indd 1

Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.indd 2

STEINMEYER | ROLLED BALL SCREWS Nuts on mounting sleeves 5 – 7 Bearing journals Flange nuts on mounting sleeves 30 – 33 Nuts with connecting thread Ball return

SCREW SHAFTS Steinmeyer delivers the following product range of screw shafts on short notice. Those marked with * are available upon request. The maximum available length of screw shafts is specified here. Different shaft lengths are available at additional cost. The standard accuracy class for rolled screw shafts is T7. Tolerance classes T5, T9 and T10 are available upon request. For information on ground ball screws please visit: www.steinmeyer.com >>> Pages 36 – 37 Maximum available total length in meters. Different shaft lengths available for extra charge. Standard accuracy class T7...

NUTS ON MOUNTING SLEEVES Order code NUT WITH CONNECTING THREAD Cylindrical single nut with connecting thread, multiliner, wiper on both sides | >>> Pages 34 – 35 8132/5.16.3,5.4 Cylindrical single nut with connecting thread, multiliner, wiper on both sides, two thread-starts | >>> Pages 34 – 35 8142/10.25.3,5.4 Continued on following pages >>> Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.i

NUTS ON MOUNTING SLEEVES Order code Flange single nut, multiliner, wiper on both sides | >>> Pages 30 – 33 8436/5.16.3,5.3 Flange single nut, multiliner, wiper on both sides, two thread-starts | >>> Pages 30 – 33 8446/20.50.7,5.6 Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.1

NUTS ON MOUNTING SLEEVES Order code Flange single nut, end cap return, wiper on both sides, two thread-starts | >>> Pages 30 – 33 2446/10.16.3,5.6 Flange single nut, external through-the-nut return , wiper on both sides, two thread-starts | >>> Pages 30 – 33 3446/20.32.6.4 Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.1

2 | BALL SCREW TECHNOLOGY Thread rolling Heat treatment: annealing ... Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.indd 8

2 | BALL SCREW TECHNOLOGY 2.2 | ACCURACY CLASSES Steinmeyer classifies rolled ball screws according to ISO 3408 part 3 – as transport ball screws in tolerance class T5 through T10. 2.2.1 | Lead error Limit ep for the average lead error e0a [µm] T10 Tolerance classes Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05

2 | BALL SCREW TECHNOLOGY 2.2.2 | Shape and position tolerances The following values define the shape and position tolerances of the functional surfaces of the ball screws. They are specifically applicable when no other specifications are provided. Measurement using Vee-block supports at the outside diameter of the shaft at points A and A’ and D and D’. Bearing journal concentric run-out Y1 [µm] Measurement E 6.1 according to ISO 3408 for journal length L6 ≦ L. The following applies for L6 > L: tolerance value *L6/L Drive journal concentric run-out Y2 [µm] Measurement E 6.1 according to ISO...

2 | BALL SCREW TECHNOLOGY Bearing journal axial run-out Y3 [µm] The values specified have been converted and correspond with the specifications of ISO 3408. The values specified have been converted and correspond with the specifications of ISO 3408. Concentric run-out of nut flange and shaft OD Y5 [µm] The values specified have been converted and correspond with the specifications of ISO 3408. 11 Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.indd 11

2 | BALL SCREW TECHNOLOGY Concentric run-out of shaft exterior diameter Y6 for short shafts [µm] The measuring interval should be chosen according to the chart. (Thread length ≦ 4* Measuring interval) Concentric run-out of shaft exterior diameter Y6 for long shafts [µm] The measuring interval should be chosen according to the chart. (Thread length > 4* Measuring interval) Steinmeyer Produktbroschüre Gerollte Kugelgewindetriebe EN-2016-05 v.1.15.indd 12

2 | BALL SCREW TECHNOLOGY 2.3 | BEARING JOURNALS AND BEARING RECOMMENDATIONS The mounting should allow for rotation of the shaft and simultaneously pass very high load bearing capacity and shaft that is adequate for the axial and the axial force on the ball screw stiffness, such that only high-quality prestressing force of this bearing is of into the adjacent construction with bearings that are optimized for drive crucial importance. as little deformation as possible. screw mounting can adequately meet Fig. 1: The most simple and cost- compared to the nominal diameter of shaft can...

2 | BALL SCREW TECHNOLOGY 2.3.1 | Bearing selection The support bearing of a ball screw This discussion thus only represents should be able to absorb the axial an initial point of reference for selection of bearings. It is by no means lateral forces from the belt drive. It meant to be universally applicable or can sometimes be difficult to find a complete. The following criteria apply suitable bearing for ball screws with large cycle criteria, and high load rating. At the same time, the bearing • xial dynamic load rating roughly A should have a sufficiently small inner equivalent to the...

2 | BALL SCREW TECHNOLOGY 2.3.2 | Commonly used bearings Steinmeyer recommends installing INA Since it is not possible to display all (angular) ball bearings. The following chart combinations here, we ask that you consult is an overview of commonly used bearings. with us for your special applications. Ball screw drive Nominal-ø [mm] INA mounting selection for fixed bearings According to chapter 2.3 (page 13) fig. 1 (complimentary to standard machining A described in chapter 2.3.3) According to chapter 2.3 (page 13) Fig. 2 Ball screw drive Nominal-ø [mm] Bearing selection for loose bearings...