Heavy Duty Tractor Rotary Cutter Gear Box Output Shaft. This shaft is 15-1/4″ over-all in length X 2″ outside diameter on both splined ends – 19 spline on the inner end – 15 spline on the output side – 2″ of usable length on both spline ends – 1-3/4″ diameter where the output. Bearing and seal ride. The threaded part of the shaft is 1 SAE w/ hole for a cotter pin. Diameter of the shaft in the middle is 2-1/4. The item “Tractor Mower Cutter Gear Box Output Shaft 19/15 Spline X 15-1/4L X 2OD New” is in sale since Monday, April 1, 2019. This item is in the category “Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Hardware Parts”. The seller is “masontractoronline” and is located in Orlando, Florida. This item can be shipped to United States.