SHAFTHUBLOCK
CALCULATION REPORT
Order : Dware
Project : Straw baling Press
Subproject : Press Crank Drive
Project item : Timing Gear
Shaft ID : PR-CRANK
Hub element ID : PR-GEAR
Calculated by : AndrÚ 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 : 266 VSN C45E 380 640 320 14 240 210000 0.30 7.85
Hub : 715 GJS EN-GJS-500-7 320 500 224 7 220 169000 0.28 7.10
Input split hub design Symbol Unit Shaft Hub
Nominal torque to transmit T N.m 800.00
Nominal axial force Fa kN 1.250
Application factor KA -- 1.25
Outside diameter do mm 60.00 --
Inside diameter di mm 0.00 60.0
Length of contact surface LF mm -- 80.0
Roughness of contact surface Ra Ám 0.800 1.600
Hint for fit and tolerance T -- p7 H8
Number of bolts nb -- 4
Minimum safety factor on slip Srmin -- 1.40
Rotation speed N rpm 0
Contact surface condition -- -- ungreased
Load classification -- -- uniform
Bolt strength class -- -- 8.8
Calculation Symbol Unit Shaft Hub
Stick coefficient νru -- 0.160
Required contact pressure pFreq N/mm▓ 30.4
Required bolt load force Fbreq N 36498
Bolt diameter db mm M12
Bolt load force Fb N 41400
Bolt tightening torque Tb N.m 71.00
Contact pressure by bolt force pF N/mm▓ 34.5
Contact pressure limit pFP N/mm▓ 127.0 182.0
Safety factor on contact pressure SF -- 3.68 5.28
Slip torque Tr N.m 1588
Safety factor on transverse slip Sru -- 1.59
Axial slip force Frl kN 2.481
Safety factor on axial slip Srl -- 1.59
Slip torque at given speed TrN N.m 1588
Outside diameter do mm 60.0 120.0
Minimum contact length LFbal mm 45
Stress at contact diameter Symbol Unit Shaft Hub
Tangential stress σtF N/mm▓ -34.5 58.0
Radial stress σrF N/mm▓ -34.5 -34.0
Comparison stress σvF N/mm▓ 34.5 80.6
Safety factor on plastic flow SFF -- 11.01 3.97
Stress at inside | outside diam Symbol Unit Shaft Hub
Tangential stress σti,o N/mm▓ -34.5 23.0
Radial stress σri,o N/mm▓ -34.5 0.0
Comparison stress σvi,o N/mm▓ 34.5 23.0
Safety factor on plastic flow SFi,o -- 11.01 13.91
Contraction - expansion Symbol Unit Shaft Hub
On outside - | inside diameter Δdodi Ám -7 24
On inside - | outside diameter Δdido Ám 0 16