(1)Structural type of slewing bearingA: 3-row roller type
(2)Drive mode
W: outer teeth,N: inner teeth,U: no teeth
(3)Mounting hole
A: through-hole for both inner and outer ring
B: threaded hole for both inner and outer ring
C：threaded hole for outer ring, through-hole for inner ring
D：threaded hole for inner ring, through-hole for outer ring
(4)Central diameter of upper roller path, mm
(5)Central diameter of upper roller, mm