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Selection of ball screws
Three types of compact FA Series are available. Choose optimal types for
application.
NSK Standard Ball Screws
Compact FA PSS Type for general uses Page 3,
7 to 30
Accuracy grade: C5 grade of JIS
Axial play: shaft dia. 6 and 8 mm; 0.005 mm or less
shaft dia. 10 mm or over; 0
Compact FA USS Type for high-accuracy and clean Page 4,
environments
31 to 36
Accuracy grade: C3 grade of JIS Axial play: 0
Compact FA FSS type for transfer equipment Page 5,
37 to 44
Accuracy grade: Ct7 grade of JIS Axial play: 0.010 mm or less
Combinations of screw shaft diameter and lead Unit: mm
Lead 5 8 10 12 15 20 25 30 40 50 60
Screw
shaft dia.
6
8
10
12
15
20
25
PSS type USS type FSS type
Support Unit