Model No. Ball Screw unit Ball Spline Detail 
specifi-
cations
CAD Dimensional
drawing
Screw 
shaft
outer 
diameter

d
Lead


Ph
Ball
center-to-
center 
diameter

dp
Outer 
diameter

D
g6
Flange 
diameter


D1
Length


L1
Outer 
diameter

D7
g6
Flange 
diameter


D5
Length


L2
2D 
(DXF)
3D
mm mm mm mm mm mm mm mm mm
BNS 0812A 8 12 8.4 32 44 28.5 32 44 25
BNS 1015A 10 15 10.5 36 48 34.5 36 48 33
BNS 1616A 16 16 16.65 48 64 40 48 64 50
BNS 2020A 20 20 20.75 56 72 48 56 72 63
BNS 2525A 25 25 26 66 86 58 66 86 71
BNS 3232A 32 32 33.25 78 103 72 78 103 80
BNS 4040A 40 40 41.75 100 130 88 100 130 100