SYNCHROBELT
CALCULATION REPORT
Order : Dware
Project : Saw Bench
Subproject : Spindle Drive
Project item : Timing Belt Transmission
Wheel1 ID : TBP-00001
Wheel2 ID : TBP-00002
Calculated by : André Dewispelaere
Organization : Dware
Date : 23-05-2015 




   Synchro belt




Nr , Description     , Type   ,    p   ,   h_t ,   h_b ,    c  ,    b  ,    F_p




-- , -----------     , ----   ,    mm  ,    mm ,    mm ,    -  ,    mm ,    N




151, Synchroflex T   , T20    ,  20.000,   5.00,   8.00,  0.142,   50.0,    7750
Input Load Symbol Unit Pulley 1 Pulley 2
Power load on smaller wheel P kW 20.000 --
Torque load on smaller wheel T N.m 0.000 --
Rotational frequency n Hz 16.6667 0.00000
Rotational speed N rpm 1000.000 0.0000
Torque load on larger wheel T N.m -- 0.000
Driver is -- -- Pulley 1 --
Estimated belt efficiency ηc -- 1.000 1.000
Load calculations Symbol Unit Pulley 1 Pulley 2
Power P kW 20.000 20.000
Rotational frequency n Hz 16.66667 5.14706
Rotational speed N rpm 1000.0000 308.8235
Torque T N.m 190.986 618.431
Transmission ratio i -- 3.23809 3.23809

Transmisson data Symbol Unit Value
Number of teeth pulley 1 z1 -- 21
Number of teeth pulley 2 z2 -- 68
Transmission ratio ic -- 3.23809
X-coordinate center pulley 2 x2 mm 360.000
Y-coordinate center pulley 2 y2 mm 120.000
Calculated center distance ac mm 379.500
Calculated belt length Lwc mm 1700.00
Calculated number of belt teeth zrc -- 85
Choosen belt length Symbol Unit Value
Belt length in catalogue Lw mm 1700.00
Number of belt teeth in catalogue zr -- 85
Requested minimum safety factor SP -- 2.00
Center distance from belt length aLw mm 375.00
Tensioning displacement stns mm 17.0
Wrap angle pully 1 β1 °.dec 133
Number of teeth in mesh zi -- 7
Load capacity calculation Symbol Unit Value
Belt width b mm 50.0
Permissible tangential force Fp N 7750
Specific power load Pspec W/mm 77.143
Pitch diameter pulley 1 dw1 mm 133.690
Pitch diameter pulley 2 dw2 mm 432.901
Tangential force Ft N 2857
Modified tangential force Ftc N 3857
Working safety factor SP -- 2.01
Requested safety factor satisfied -- -- yes
Belt velocity vt m/s 7.00
Allowed belt velocity vtmax m/s 40.00