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 : André 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/mm² N/mm² N/mm²   %    HB   N/mm²   --  kg/dm³




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 µm 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/mm² 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/mm² 34.5
Contact pressure limit pFP N/mm² 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/mm² -34.5 58.0
Radial stress σrF N/mm² -34.5 -34.0
Comparison stress σvF N/mm² 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/mm² -34.5 23.0
Radial stress σri,o N/mm² -34.5 0.0
Comparison stress σvi,o N/mm² 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 Δdo|Δdi µm -7 24
On inside - | outside diameter Δdi|Δdo µm 0 16