Technical Data Synchronous Belts / Belt Sprockets Selection
Various Official Lists
| Item | Formula | Explanation of symbols |
|---|---|---|
| Pitch Diameter Dp mm | Dp = N × p π | N：Number of teeth of belt sprocket p：Belt pitch mm |
| Belt speed V m/s | V = πDp × n 1000 × 60 | Dp：Pitch circle diameter of belt sprocket mm n：Revolution of belt sprockets r/min |
| Tension required for drive Fa N {kgf} | Fa =
9.8 × 102 × P
V
=
2T
Dp
1000
Gravity unit ： |
P：Power kW V：Belt speed m/s T：Torque N・m {kgf・m} Dp：Pitch circle diameter of belt sprocket mm |
| Power P kW | P =
Fa × V
1000
=
T × n
974 × 9.8
Gravity unit ： |
Fa：Tension required for drive N {kgf} V：Belt speed m/s T：Torque N・m {kgf・m} n：Speed r/min |
| Torque T N・m {kgf・m} | T =
9.8 × 974 × P
n
Gravity unit ： |
P：Power kW n：Speed r/min |
| Torque due to flywheel effect Tf N・m {kgf・m} | Tf =
Iπ(n2 - n1)
30t
Gravity unit ： |
I：Moment of Inertia kg・m2 n1：Revolution before acceleration (deceleration) r/min n2：Revolution after acceleration (deceleration) r/min t：Time from n1 to n2 s GD2：Flywheel effect {kgf・m2} |
| Distance between shafts C mm | C =
B + B2 - 2(Dp - dp)2
4
B = L - 1.57(Dp + dp) |
L：Belt length mm Dp：Pitch circle diameter of large belt sprocket mm dp：Pitch circle diameter of small belt sprocket mm |
| Belt length L mm | L = 2C + 1.57(Dp + dp) + (Dp - dp)2 4C | Dp：Pitch circle diameter of large belt sprocket mm dp：Pitch circle diameter of small belt sprocket mm C：Distance between shafts mm |
| Number of meshing teeth of small belt sprocket Zm | Zm = N ×
Φ
360゜
Φ = 180゜ - 57゜(Dp - dp) C |
N：Number of teeth of small belt sprocket Φ：Belt contact angle to small belt sprocket degrees degrees Dp：Pitch circle diameter of large belt sprocket mm dp：Pitch circle diameter of small belt sprocket mm C：Distance between shafts mm |
