Description:Shaft assembly for use with support & vibratory drive group that provides hydraulic motor and coupling to drive vibratory system and support chassis on Cat machines.Attributes:• Hardened steel shaft with coupling• External Spline Number of Teeth: 14 (Shaft)• Internal Spline Number of Teeth: 21 (Coupling)• External Number of Teeth: 12 (Coupling)• Length: 555.6 mm (21.874 in)Application:Consult your owner's manual or contact your local Cat Dealer for more information.