SHAFTHUBLOCK
CALCULATION REPORT
Order : Dware
Project : Demo
Subproject : ShaftHubLock
Project item : Press - Shrink Connection
Shaft ID : SH00080
Hub ID : HB00080
Calculated by : André Dewispelaere
Organization : Dware - Belgium
Date : 26/02/2023 



   Materials - Properties




Element: ID    Cl  Denomination    RpN    RmN  sWbN   A5   HB     E     nu   rho




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




Shaft  : 370  VSV  42CrMo4 V        900  1100   530   10  300  210000  0.30  7.85




Hub    : 720  GJS  EN-GJS-600-3     370   600   248    3  250  174000  0.28  7.20
1 1. Input press/shrink fit Symbol Unit Shaft Hub
2 Nominal torque to transmit T Nm 800.00
3 Axial force to transmit Fa kN 2.000
4 Application factor KA -- 1.00
5 Outside diameter do mm 80.00 168.00
6 Inside diameter di mm 0.00 80.00
7 Length of contact surface LF mm -- 100.0
8 Roughness of contact surface Ra µm 0.800 0.800
9 Tolerance class TG -- -- 7
10 Min safety factor plastic flow SF -- 1.15 1.15
11 Minimum safety factor on slip Srmin -- 1.40
12 Rotation speed N rpm 1000
13 Surface condition -- -- ungreased
14 Assembly method -- -- shrink
15 Load classification -- -- reversed
16 Basic fit system -- -- hole
17 2. Calculation results Symbol Unit Hub Hub
18 Required tangential force Ftreq N 20000.0
19 Required resultant stick force Freq N 20099.8
20 Contact surface area AF mm² 25133
21 Stick coefficient νru -- 0.150
22 Required contact pressure pFreq N/mm² 8
23 Diameter ratio Q -- 0.000 0.476
24 Strain factor K µm²/N 3.33 10.72
25 Required smoothed interference Preq µm 8
26 Smoothing of contact surface G µm 10
27 Minimum oversized interference Pomin µm 18
28 Necessary shaft hub fit -- -- s6 H7
29 Tolerance value TG µm 19 30
30 Lower deviation Ai µm 59 0
31 Upper deviation Ae µm 78 30
32 Minimal fit interference PominT µm 29
33 Maximal fit interference PomaxT µm 78
34 Max smoothed fit interference Pmax µm 68
35 Maximal fit contact pressure pFmax N/mm² 61
36 Contact pressure limit pFlim N/mm² 900 159
37 Safety factor on contact pressure SF -- 14.88 2.63
38 Minimal torque capacity Tri Nm 2536
39 Safety factor on slip Sri -- 3.17
40 Minimal torque capacity at speed N TriN Nm 2510
41 Minimum contact length LFmin mm 44
42 3. Assembly force fit Symbol Unit Shaft Hub
43 Upper axial press force Fpr kN 212.9
44 Oversize for assembly PoF µm 158
45 Linear contraction|expansion coeff α E-6/°K 8.50 10.00
46 Cooling - | heating temperature θ °C 20 218
47 Min cooling | max heating temperat θmin,max °C -196 350
48 4. Stress at the contact surface Symbol Unit Shaft Hub
49 Tangential stress σtF N/mm² -60.5 95.9
50 Radial stress σrF N/mm² -60.5 -60.5
51 Comparison stress σvF N/mm² 60.5 136.6
52 Safety factor on plast flow SFF -- 14.88 2.71
53 5. Stress on inside | outside diam Symbol Unit Shaft Hub
54 Tangential stress σti,o N/mm² -60.5 35.4
55 Radial stress σri,o N/mm² -60.5 0.0
56 Comparison stress σvi,o N/mm² 60.5 35.4
57 Safety factor on plast flow SFi,o -- 14.88 10.45
58 6. Contraction - expansion at Symbol Unit Shaft Hub
59 Outside - | inside diameter Δdo|Δdi µm -16 52
60 Inside - | outside diameter Δdi|Δdo µm 0 34