This model is basically the same as model NAST-R, but does not have an inner ring.
Since the circumference of the outer ring is spherically ground, it helps lighten a biased load (symbol R).

Model No. Main dimensions Basic load rating Detail specifications CAD Dimensional drawing
Inner 
diameter
di
Inscribed bore 
diameter
dr
Outer 
diameter
D

B

C
Dynamic rating
C
Static rating
C0
2D (DXF) 3D
mm mm mm mm mm kN kN
RNAST 5R 7 16 7.8 2.74 2.39
RNAST 6R 10 19 9.8 4.12 4.55
RNAST 8R 12 24 9.8 5.68 5.89
RNAST 10R 14 30 11.8 9.7 9.67
RNAST 12R 16 32 11.8 10.4 10.9
RNAST 15R 20 35 11.8 12.3 14.3
RNAST 17R 22 40 15.8 17.4 20.9
RNAST 20R 25 47 15.8 19.2 24.5
RNAST 25R 30 52 15.8 20.7 28.4
RNAST 30R 38 62 19.8 30.3 45.4
RNAST 35R 42 72 19.8 32.2 50.6
RNAST 40R 50 80 19.8 35.7 61.6
RNAST 45R 55 85 19.8 37.1 66.4
RNAST 50R 60 90 19.8 38.7 71.8