Basic Introduction and Parameter Calculation of Sprockets

Drive sprocket, also known as roller sprocket, is a wheel with embedded chain teeth that is used to mesh with accurately spaced blocks on the chain link or cable. It is a solid or spoke gear that meshes with the roller chain to transmit motion.

The commonly used pitches for chain wheels are 12.7mm, 15.875 mm19.05mm, and 25.4mm, and the commonly used roller diameters are 7.92mm, 10.16mm, 11.91mm, and 15.88mm. Sprockets play a crucial role in the operation of conveying equipment, so their materials should ensure that the teeth have sufficient strength and wear resistance. Therefore, the tooth surface of chain wheels is generally subjected to heat treatment to achieve a certain hardness. The tooth shape of the sprocket must ensure that the chain can enter and exit meshing smoothly and smoothly, minimize the impact and contact stress of the chain link during meshing, and be easy to machine.

Calculation formula for sprocket parameters:

Dividing circle diameter: d=p/sin180 °/z p=pitch (can be checked in the table) Z=number of teeth

Tooth tip circle (outer diameter): D=px (0.54+cot180 °/z)

Dividing circle diameter: d=p/sin (180 °/z)

Tooth tip circle diameter: dmax=d+1.25p-d1

Dmin=d+(1-1.6/z) p-d1

Root circle diameter: df=d-d1

Note: p Chain pitch, number of sprocket teeth, d1 Chain roller diameter

Sprocket model: includes non-standard sprockets (customized according to customer drawings) and standard sprockets (American and metric).

Common material for sprocket: C45

Common processing methods for sprockets include quenching treatment and surface blackening treatment. The general principle for selecting the number of sprocket teeth: 19 teeth or more are generally used for driving sprockets operating at medium to high speeds and normal working conditions; 17 teeth or less are only used for small pitch driving sprockets. 23 teeth or more are recommended for situations with impact. When the speed ratio is low, using a high number of teeth sprocket can greatly reduce the rotation of the chain link, the tensile load of the chain, and the load on the bearings.

Sprockets are important accessory products in many machinery. Their basic functions and applicability have reached good standards for important practical applications. However, their basic quality assurance is closely related to their materials, facilitating their performance. Good quality ensures the best efficiency foundation, and high-quality products require a material foundation. Good. Only then can we ensure the best efficiency foundation, while high-quality products need a material foundation. Sprockets are widely used in mechanical transmission in industries such as conveying machinery, textile machinery, food processing, and logistics transportation.