Chain drive | Online Calculator

Drive Calculators

Chain Drive

Chain drives are used to transmit torque between parallel shafts. At that, the transmission power usually does not exceed 100 kW. Compared to belt drives, the chain ones have smaller overall dimensions and shaft loads, as well as higher coefficient of efficiency. Chain drives are not slipping and can be used in aggressive environments (acid, alkaline and oil product vapors).

At the same time, the chain drive has a number of disadvantages, including stretching of the chains during operation due to hinge wear, noise, uneven travel, need for regular chain maintenance and lubrication.

Drive chains can have from one to four rows of links with a link pitch from 8 to 140 mm (chains with a link pitch from 12.7 to 50.8 mm are most widely used).

To calculate the chain drive, it is necessary to set the drive pulley speed n, power P, gear ratio i , number of chain rows m and angle of inclination Θ of the line, connecting the centers of the drive’s shafts. Based on the results of the calculations, the dimensions of the drive, sprocket diameters, number of chain links, shaft loads and other characteristics of the drive are determined.

Chain Drives
Calculation of Chain Drives

INITIAL DATA

n - Drive pulley speed;

P - Drive power;

i - Gear ratio;

m - Number of chain rows;

θ - Slope of the chain drive.

RESULTS DATA

T - Torque;

t - Chain pitch;

аn - Nominal center distance, according to chain pitch;

z1 - Number of teeth of the drive sprocket;

d1 - Pitch diameter of drive sprocket;

z2 - Number of teeth of the driven sprocket;

d2 - Pitch diameter of driven sprocket;

b - Number of chain links;

w - Linear speed of the chain;

Ft - Chain force.

Drive pulley speed (n)

Drive power (P)

Gear ratio (i)

Number of chain rows (m)

Slope( θ)

Smooth load

Impulse load

Crankcase lubricant

Permanent lubrication

Periodic lubrication

Work in one shift

Work in two shifts

Work in three shifts

Torque (Т)

Chain pitch (t)

Center distance (аn)

Number of teeth (z1)

Pitch diameter (d1)

Number of teeth (z2)

Pitch diameter (d2)

Number of chain links (b)

Linear speed (w)

Chain force (Ft)

BASIC FORMULAS

Torque:

T = 30P / πn;

Chain pitch:

t = 2,8*(T*Ke / z1*[p]*m)1/2;
Ke - coefficient of the work conditions;
[p] - limited pressure in chain links;

Center distance:

a = 40*t;

Number of teeth of the smaller sprocket:

z = 31 - 2i;

Pitch diameter:

di = t / sin(180 / z);

Linear speed:

w = d1*π*n / 60;

Chain force:

Ft = P / w.

INITIAL DATA

n - Drive pulley speed;

P - Drive power;

i - Gear ratio;

m - Number of chain rows;

θ - Slope of the chain drive.

RESULTS DATA

T - Torque;

t - Chain pitch;

аn - Nominal center distance, according to chain pitch;

z1 - Number of teeth of the drive sprocket;

d1 - Pitch diameter of drive sprocket;

z2 - Number of teeth of the driven sprocket;

d2 - Pitch diameter of driven sprocket;

b - Number of chain links;

w - Linear speed of the chain;

Ft - Chain force.

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