SHAFTHUBLOCK
CALCULATION REPORT
Order : Dware
Project : Baling press
Subproject : Crank connecting rod drive
Project item : Crankshaft
Shaft ID : PR-SHAFT
Hub element ID : PR-CRANK
Calculated by : Andr Dewispelaere
Organization : Dware
Date : 01/06/2018
Mating materials
Element: ID Cl Denomination R_pN R_mN s_WbN A5 HB E nu rho
-------: --- --- -------------- N/mm N/mm N/mm % HB N/mm -- kg/dm
Shaft : 316 VSV C45E V 490 700 340 14 190 210000 0.30 7.85
Hub : 615 GSN GS-52 260 520 260 18 250 215000 0.30 7.80
Input press/shrink fit Symbol Unit Shaft Hub
Nominal torque to transmit T N.m 800.00
Nominal axial force Fa kN 2.500
Application factor KA -- 1.25
Outside diameter do mm 70.00 140.00
Inside diameter di mm 0.00 70.00
Length of contact surface LF mm -- 60.0
Roughness of contact surface Ra m 0.800 0.800
Tolerance class Tg -- -- 7
Min safety factor plastic flow SF -- 1.00 1.00
Minimum safety factor on slip Srmin -- 1.40
Rotation speed N rpm 500
Surface condition -- -- ungreased
Assembly method -- -- press
Load classification -- -- uniform
Basic fit system -- -- hole
Calculation Symbol Unit Hub Hub
Required tangential force Ftreq N 28571.4
Required resultant stick force Freq N 28741.8
Contact surface area AF mm 13195
Stick coefficient νru -- 0.090
Required contact pressure pFreq N/mm 34
Diameter ratio Q -- 0.000 0.500
Strain factor K m/N 3.33 9.15
Required smoothed interference Preq m 30
Smoothing of contact surface G m 10
Minimum oversized interference Pomin m 40
Necessary shaft hub fit -- -- t6 H7
Tolerance value Tg m 19 30
Lower deviation Ai m 75 0
Upper deviation Ae m 94 30
Minimum fit interference PominT m 45
Maximum fit interference PomaxT m 94
Max smoothed fit interference Pmax m 84
Maximum fit contact pressure pFmax N/mm 96
Contact pressure limit pFlim N/mm 490 108
Safety factor on contact pressure SF -- 5.10 1.13
Minor torque capacity Tri N.m 1653
Safety factor on slip Sri -- 1.65
Minor torque capacity at speed N TriN N.m 1652
Minimum contact length LFmin mm 50
Assembly Symbol Unit Shaft Hub
Upper axial press force Fpr kN 101.3
Oversize for assembly PoF m 164
Linear contraction|expansion coeff α E-6/K 8.50 11.00
Cooling - | heating temperature θ C 20 233
Min cooling | max heating temperat θmin,max C -196 350
Stress on contact surface Symbol Unit Shaft Hub
Tangential stress σtF N/mm -96 160
Radial stress σrF N/mm -96 -96
Comparison stress σvF N/mm 96 224
Safety factor on plast flow SFF -- 5.10 1.16
Stress on inside | outside diam Symbol Unit Shaft Hub
Tangential stress σti,o N/mm -96 64
Radial stress σri,o N/mm -96 0
Comparison stress σvi,o N/mm 96 64
Safety factor on plast flow SFi,o -- 5.10 4.06
Contraction - expansion on Symbol Unit Shaft Hub
Outside - | inside diameter Δdodi m -22 61
Inside - | outside diameter Δdido m 0 42