«JB/T 10838-2008»
«JB/T 10838-2008» standard slewing ring numbering method:

Description:
No teeth single-row ball slewing ring compose by the same diameter of the inner and outer ring , the plug and the grease hole arranged in the outer ring.
Outer tooth (JW) structure diagram (mounting hole thread T can be the other side of the hole):

Inner tooth (JN) chart (mounting hole thread T the other end in hole):

No teeth (JU) chart (mounting hole thread T can be the other side of the hole):

Note:no teeth (JU) Series Dimension compose by the same inner diameter D and the outer tooth gear dn, whose plug and grease hole arranged in the outer ring.