V-belt Drive | Online Calculator (2024)

INITIAL DATA

n - Drive pulley speed;

P - Drive power;

i - Gear ratio.

RESULTS DATA

T - Torque;

d₁ - Driving pulley diameter;

d₂ - Driven pulley diameter;

a_n - Nominal center distance, calculated according to the available belt length;

α₁ - The angle of the belt wrap around the smaller pulley;

L - Total belt length;

W - Belt linear speed;

z - Number of belts to provide drive power;

F₀ - Belt pretension;

F_в - Loads on the shafts;

H₀ - Life time of the belt.

MetricImperial

BASIC FORMULAS

Torque:

T = 30P / πn;

Driving pulley diameter:

d₁ = 40T ^1/3, but no less than 90 mm for A; 125 mm for B; 200 mm for C; 315 mm for D; and 500 mm for E belt type;

Center distance:

a_n = 1,5(d₁ + d₂);

Belt length:

L = 2a + 0,5π(d₂ + d₁) + (d₂ - d₁)² / 4a;

Number of belts:

Z = P₁*C_P / P₀C_LC_αC_k ;
C_P, C_L, C_α , C_k - coefficients depending on belt girth angle, belt length and belt type;
P₁ - nominal power, transmitted by one belt.

Linear speed:

w = d₁*π*n / 60;

Life time:

H₀ = N_0c*(L / 60πd₁ f )*(σ_-1 / σ_max)⁸×C_i.
N_0c = 470 000 - base number of load cycles;
C_i = 1.5*i^1/3 - 0.5 - Coefficient of gear ratio;
σ_max - maximum stress in the belt.

INITIAL DATA

n - Drive pulley speed;

P - Drive power;

d₁ - Driving pulley diameter;

i - Gear ratio.

RESULTS DATA

T - Torque;

d₁ - Driving pulley diameter. Recommended diameter based on the power and speed of the drive;

d₂ - Driven pulley diameter;

a_n - Nominal center distance, calculated according to the available belt length;

α₁ - The angle of the belt wrap around the smaller pulley;

L - Total belt length;

W - Belt linear speed;

z - Number of belts to provide drive power;

F₀ - Belt pretension;

F_в - Loads on the shafts;

H₀ - Life time of the belt.