Bulletin HY25-1890-M1/US Owner’s Manual10-Bolt Extended Shaft PTOsParker Hannifin CorporationChelsea Products DivisionOlive Branch, MS 38654 USA5General InformationFunction of Auxiliary Power ShaftsAn auxiliary power shaft transmits torque from the power source to the driven accessory. The shaft mustbe capable of transmitting the maximum torque and RPM required of the accessory, plus any shock loadsthat develop.An auxiliary power shaft operates through constantly relative angles between the power source and thedriven accessory. Therefore, the length of the auxiliary power shaft must be capable of changing whiletransmitting torque. This length change, commonly called “slip movement”, is caused by movement of thepowertrain due to torque reactions and chassis deflections.Joint operating angles are very important in an auxiliary power shaft application. In many cases, thelongevity of a joint is dependent on the operating angles. (See chart below)This information is limited to 1000 through 1310 Series applications. For applications requiring a serieslarger than 1310, contact your local Chelsea distributor.Determining Shaft Type1) Solid or tubular?a) In applications requiring more than 1000 RPM or where the application necessitates a highly bal-anced auxiliary power shaft, a tubular shaft should be used.b) Spicer’s solid shafting auxiliary power joints are designed for 1000 or less RPM intermittentservice such as:Driving small hydraulic pumpsDriving winchesDriving low speed product pumps2) Joint Series should be determined using the chart on the following page.SPICeR® UNIVeRSAL JOINT OPeRATING ANGLeSProp. Shaft RPM Max. NormalOperating Angle Prop. Shaft RPM Max. NormalOperating Angle3000 5° 50' 1500 11° 30'2500 7° 00' 1000 11° 30'2000 8° 40' 500 11° 30'Above based on angular acceleration of 100 RAD/SEC2