3 Driving systems Ball and roller screws
How to orientate your choice In our wide range, you are sure to find the product which fits exactly your requirements: ● The miniature ball screws (➔ figure 5), either with ball recirculation by integrated tube or with inserts, are very compact. Backdriving makes them highly efficient. ● The large ball screws (➔ figure 6) enable you to select the right level of requirement: simple transport screws, very fast screws with long lead, or preloaded screws for more precision. ● Ground ball screws for more rigidity and precision (➔ figure 7) ● Roller screws (➔ figure 8) which are far beyond the limits of any ball screws as for heavy loads, ultimate precision and rigidity, high speed and acceleration and very difficult environments.
Figure 5
Figure 6
Figure 7
Figure 8
Table 2 will guide you in your first approach.
Table 2 Type
Details
SD/BD/SH Diameter Ø 6 to 16 mm
SX/BX, SN/BN/PN SND/BND/PND SL/BL, SLD/BLD Din standard Ø 16 to 63 mm PGFJ, PGFL, PGFE, PGCL Ø 16 to 125 mm
SRC, SRF, TRK/PRK, SVC, PVK Ø 8 to 210 mm
104
Basic dynamic load rating
Precision Ep (µ) on 300 mm
High duty cycles
Adverse environment (Spec. steel, pollution)
Up to 7.6 kN
G9 (130 µ) to G5 (23 µ)
good
Up to 95 kN
G9 (130 µ) to G5 (23 µ)
satisfactory
Up to 270 kN
G5 (23 µ) to G1 (6 µ)
satisfactory
Up to 2235 kN
G5 (23 µ) to G1 (6 µ)
exceptional
© SKF 2005