- Date:31 May 2020
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Table of Contents,Driveline Sizing,Table of Contents. Specifying a Spicer Driveline 2,Application Definitions 2. Calculating Maximum Driveshaft Torque,Domestic Applications 3. Export Applications 5,Application Guidelines 6,10 Series Graph 6. SPL Graph 7,SPL Interaxle Graph 8,Critical Speed,Critical Speed 9.

Standard Equation 9,Simplified Equations 9,Adjusted Critical Speed 10. Spicer Diamond Series Critical Speed 10,Maximum Driveshaft Length 11. Spicer Standard Tube Sizes 12,Center Bearing Mounting. Center Bearing Mounting 13,Driveline Analysis,Driveline Analysis 14. Design Criteria 14,Torsional and Inertial Excitation 14.

Center Bearing Loading 18,Joint Life vs Joint Angles 20. Application Form 21,End Yoke Dimensions 23,Attaching Hardware and Torque Specs 28. Driveline Sizing,Specifying a Spicer Driveline,Application Definitions. Domestic applications restricted to the continental United States Canada Aus. tralia and New Zealand, On highway operation on well maintained concrete and asphalt roadways. including turnpikes interstates and state routes with not more than 10 off. highway operation, Off highway operation on unimproved dirt or gravel roads as well as poorly.

maintained paved roads more than 10 of the time, Line haul operation on well maintained concrete and asphalt roadways. including turnpikes interstates and state routes 100 of the time with a maxi. mum 80 000 lb GCW, Export applications outside of the continental United States Canada Australia. and New Zealand, Driveline sizing for export applications is based on Maximum Driveshaft. Torque only see Calculating Maximum Driveshaft Torque Export Applica. tions on page 5,Driveline Sizing,Calculating Maximum Low Gear Torque. Step 1 Low Gear Torque Calculation,LGT T x TLGR x TE x SR x TCR x C.

LGT Maximum Driveshaft Low Gear Torque, T Net Engine Torque or 95 of the Gross Engine Torque. TLGR Transmission Low Gear Ratio forward, TE Transmission Efficiency automatic 0 8 manual 0 85. SR Torque Converter Stall Ratio if applicable,Torque Calculations. TCR Transfer Case or Auxiliary Transmission Ratio if applicable. C Transfer Case Efficiency if applicable 0 95, Some applications require deep reduction transmissions for speed controlled operations such as paving and pour. ing In these applications it may be more appropriate to use the second lowest forward transmission ratio to calculate. the Maximum Low Gear Torque To use the second lowest forward gear ratio to calculate LGT all three of the fol. lowing conditions must be met, 1 Lowest forward gear ratio numerically greater than 16 1.

2 Split between the lowest forward gear ratio and the second lowest forward gear ratio is greater than 50. 3 Startability Index must be greater than 25 see below calculation. Startability Index Calculation,SI T x TR x AR x TCR x 942 4 RR x GCW. SI Startability Index,T Engine Clutch Engagement Torque at 800 RPM. TR Transmission Second Lowest Forward Gear Ratio,AR Axle Ratio. TCR Transfer Case or Auxiliary Transmission Ratio if applicable. RR Tire Rolling Radius in,GCW Maximum Gross Combination Weight lbs. Step 2 Wheel Slip Calculation,WST 71 x W x RR 11 4 x AR.

WST Wheel Slip Torque Applied to the Driveshaft,W Axle Capacity lbs. RR Tire Rolling Radius in,AR Axle Ratio,Driveline Sizing. Step 3 Gradeability Calculation,Calculate the torque required for 25 gradeability. Note For Linehaul applications with 3 10 axle ratio or numerically larger only. GT 265 x RR x GVW 11 4 x AR,GT Net Driveline Torque at 25 Gradeability. RR Tire Rolling Radius in,GVW Gross Vehicle Weight lbs.

AR Axle Ratio,Step 4 Overall Low Gear Ratio Calculation. OLGR TLGR x SR x TCR,OLGR Overall Low Gear Ratio,TLGR Transmission Low Gear Ratio. SR Torque Converter Stall Ratio if applicable, TCR Transfer Case or Auxiliary Transmission Ratio if applicable. Step 5 Driveline Series Selection,To select a driveline series. 1 Plot the torque values determined from Steps 1 2 and 3 with the overall low gear ratio OLGR. from Step 4 on the appropriate graph for Ten Series or SPL Series in the Applications Guidelines. section on pages 6 7, 2 To determine the appropriate driveline series for SPL or 10 Series using the Application Guidelines.

graphs on pages 6 7 use the smallest series for the main driveline as determined from Steps 1. Note The selected driveline series can not be more than one series smaller than the series. selected from Step 1 LGT, Step 6 Specifying the Interaxle Driveline if applicable. To specify the interaxle driveline use, 1 60 of the Driveline Series Selection torque from Step 5 and the OLGR from Step 4. 2 Find the appropriate interaxle driveline series for SPL using the Driveline Sizing graph under. Application Guidelines on page 8 and for Ten Series using the Driveline Sizing graph under. Application Guidelines on page 6, Note High angle 45 interaxle driveshafts are available in SPL170 SPL250 and 1710 Series only. Driveline Sizing,Calculating Maximum Driveshaft Torque for Export. Torque Calculations,Applications,Step 1 Low Gear Torque Calculation.

LGT T x TLGR x TE x SR x TCR x C,LGT Maximum Driveshaft Low Gear Torque. T Net Engine Torque or 95 of the Gross Engine Torque. TLGR Transmission Low Gear Ratio forward, TE Transmission Efficiency automatic 0 8 manual 0 85. SR Torque Converter Stall Ratio if applicable, TCR Transfer Case or Auxiliary Transmission Ratio if applicable. C Transfer Case Efficiency if applicable 0 95,Step 2 Overall Low Gear Ratio Calculation. OLGR TLGR x SR x TCR,OLGR Overall Low Gear Ratio,TLGR Transmission Low Gear Ratio.

SR Torque Converter Stall Ratio if applicable, TCR Transfer Case or Auxiliary Transmission Ratio if applicable. Step 3 Driveline Series Selection,To select a driveline series. 1 Plot the torque value determined from Step 1 with the overall low gear ratio OLGR from Step 2 on. the appropriate graph for 10 Series or SPL Series in the Applications Guidelines section on. Step 4 Specifying the Interaxle Driveline if applicable. To specify the interaxle driveline use, 1 60 of the Driveline Series Selection torque from Step 1 and the OLGR from Step 2. 2 Find the appropriate interaxle driveline series for SPL using the Driveline Sizing graph under. Application Guidelines on page 8 and for 10 Series using the Driveline Sizing graph under. Application Guidelines on page 6, Note High angle 45 interaxle driveshafts are available in SPL170 SPL250 and 1710 Series only. Driveline Sizing,Application Graphs,10 Series Graph.

Driveline Sizing,SPL Series Graph,Application Guidelines. Driveline Sizing,SPL Interaxle Series Graph,Critical Speed. Critical Speed, Critical speed is defined as The speed at which the rotational speed of the. driveshaft coincides with the natural frequency of the shaft. Standard Equation,CS 30 E x 386 4 O 2 I 2,P x L4 x 16. CS Critical Speed,E Modulus of tubing material psi.

O Outside Diameter of Tubing in,I Inside Diameter of Tubing in. P Density of Tubing Material lbs in3,L Distance Between Journal Cross Centers in. Refer to Spicer Standard Tube Sizes on page 11 for tube dimensions. Material Properties,Material Modulus Density E P x 386 4. Critical Speed,Steel 30 00 x 106 0 2830 41 0 x 109. Aluminum 10 30 x 106 0 0980 39 4 x 109,Simplified Equations.

4 769 x 10 6,4 748 x 10 6,CS Critical Speed,L Distance Between Journal Cross Centers in. O Outside Diameter of Tubing in,I Inside Diameter of Tubing in. Critical Speed, Adjusted Critical Speed Maximum Safe Operating Speed. ACS TC x CF x SF,ACS Adjusted Critical Speed,TC Theoretical Critical. CF Correction Factor,SF Safety Factor,Suggested factors for Adjusted Critical Speed.

Safety Factor 0 75,Correction Factor,Outboard Slip 0 92. Inboard Slip 0 75, Note The value for ACS Maximum Safe Operating Speed must be greater that the. maximum driveshaft speed of the vehicle,Spicer Diamond Series Adjusted Critical Speed. The Spicer Diamond Series driveshaft combines a light weight aluminum tube with. traditional steel end components The Spicer Diamond Series is available in two tube. sizes for driveline installed lengths of 80 in to 130 in The following formulas can be. used to calculate the Maximum Safe Operating Speed ACS for each tube design. Spicer Diamond Series 7 inch straight tube, Note The maximum installed length for the 7 inch straight design is 106 in. Spicer Diamond Series 8 5 inch hydroformed tube, Note The maximum installed length for the 8 5 inch hydroformed design is 130 in.

Critical Speed,Maximum Driveshaft Length, Refer to the chart at the bottom of this page for maximum driveshaft length vs RPM guidelines This infor. mation can also be found in TMC Recommended Practice RP610A Chart 3. The general length limitations are as follows,Tube O D Maximum Length Driveline Series. 3 0 in 60 in SPL32 SPL36,3 5 in 65 in SPL55 SPL70,4 0 in 70 in 1710 1760 SPL100. 4 2 in 72 in SPL140,4 3 in 73 in SPL140HD,4 5 in 75 in 1710 1810. 5 0 in 80 in SPL170 SPL250,5 5 in 83 in SPL350,Installed length u joint center to u joint center.

DS Length vs RPM,Critical Speed,5 5 IN DIA TUBING,CENTERLINE TO CENTERLINE LENGTH INCHES. 5 0 IN DIA TUBING,4 5 IN DIA TUBING,4 0 IN DIA TUBING. 3 5 IN DIA TUBING,3 0 IN DIA TUBING,2000 3000 4000 5000. Critical Speed,Spicer Standard Tube Sizes, Series Tube Size in Dana Part Number Torque Rating Tube JAEL. lbs ft lbs ft,1610 4 00 x 134 32 30 52 5 700 8 600.

1710 4 00 x 134 32 30 52 7 700 8 600,1710 HD 4 09 x 180 32 30 72 10 200 13 925. 1760 4 00 x 134 32 30 92 10 200 10 435,1760 HD 4 09 x 180 32 30 72 12 200 13 925. 1810 4 50 x 134 36 30 62 12 200 13 065,1810 HD 4 59 x 180 36 30 102 16 500 17 935. SPL 90 4 00 x 095 32 30 12 4 900 6 300,SPL 100 4 00 x 095 32 30 12 5 700 6 300. SPL 140 4 21 x 138 100 30 3 7 744 11 010,SPL 140 HD 4 33 x 197 100 30 5 10 325 16 519.

SPL 170 4 96 x 118 120 30 3 12 539 13 185,SPL 170 HD 5 06 x 167 120 30 4 12 539 19 617. SPL 170 I A 4 59 x 180 36 30 102 11 063 17 935,SPL 250 I A 5 06 x 167 120 30 4 15 489 19 617. SPL 250 5 06 x 167 120 30 4 16 595 19 617,SPL250 HD 5 12 x 197 120 30 5 18 439 23 555. SPL350 5 45 x 167 130 30 21720 22 127 24 180,SPL350 HD 5 51 x 197 130 30 21718 25 815 28 731. Center Bearing Mounting,Center Bearing Mounting,Center Bearing Mounting.

Spicer heavy duty center bearings must be mounted within 3 of perpendicular to the. coupling shaft centerline as shown in Figure 1 below and the center bearing assembly. must not operate with a linear offset greater than 1 8 inch as shown in Figure 2. Note The Spicer XC self aligning center bearing may be mounted up to 10 of per. pendicular to the coupling shaft centerline as shown in the side view of Figure 1. The rubber isolator must remain perpendicular to the coupling shaft centerline within. 3 as shown in Figure 1,Driveline Analysis,Driveline Analysis. Design Criteria,Torsional Vibration,Inertial Vibration. Center Bearing Loading,Torsional and Inertial Excitation. Driveline Layout,0 67 D B 0 8 C 0,4 A 1 3 D B 0 05. x Unit Degree,Calculate Joint Angles,View from Rear of Driveline.

To find the true joint angle of each joint first find the top view and side view angles of each joint The top. view angle of Joint A is equal to 0 67 0 00 0 67 and the side view joint angle of Joint A is equal to 4 0. 1 3 2 70 By putting the top view angle 0 67 to the X axis and the side view angle 2 70 to the Y. axis the true joint angle of Joint A is equal to 2 78 284 1 degrees. Note The true joint angle is a vector the 2 78 degrees is the magnitude and the 284 1 degree is the argu. ment The true joint angles of joints A B and C are shown in the following chart. Step 3 Gradeability Calculation Calculate the torque required for 25 gradeability Note For Linehaul applications with 3 10 axle ratio or numerically larger only GT 265 x RR x GVW 11 4 x AR Step 4 Overall Low Gear Ratio Calculation OLGR TLGR x SR x TCR Step 5 Driveline Series Selection To select a driveline series 1 Plot the torque values determined from Steps 1 2 and 3

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