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Pulley Group

Pulley Group

Pulley block introduction

A pulley is a set of simple tool consisted of one or more wheels over which a rope can be looped for the purpose of labor saving and movement direction changing. Pulleys can be divided into crown block/ fixed pulley and fall block /movable pulley based on functions of pulleys while based on materials, pulley blocks can be classified into cast iron pulley, cast steel pulley, nylon pulley, and aluminum pulleys, etc.NXNHenan Dongqi Machinery Co., Ltd

Types and Features of pulley block

1) On pulley functions

According to different functions, pulleys can be divided in crown block/ fixed pulley and fall block/ moveable pulley.NXNHenan Dongqi Machinery Co., Ltd

Crown pulley/ fixed pulley used in the lifting operations is meant to change the moving direction of wire rope while the fall block / moveable pulley is used to save the effort and energy. Therefore, they are coordinated to consist the pulley block which can save energy and change the direction of movement at same time.NXNHenan Dongqi Machinery Co., Ltd

pulley functionsNXNHenan Dongqi Machinery Co., Ltd

2) On pulley materials

Based on different materials, pulleys can be classified into cast iron pulley, cast steel pulley, nylon pulley, and aluminum pulleys.NXNHenan Dongqi Machinery Co., Ltd

Cast iron pulleyNXNHenan Dongqi Machinery Co., Ltd

Cast iron pulleyCast iron pulleys can be further divided into gray cast iron pulley and nodular cast iron pulley. The gray cast iron pulley has the features of good performance, little wear to wire rope which is widely used in light working duty cranes. On the contrast, the nodular cast iron pulleys can stand more collision than that of gray cast iron and they are widely used in the heavy duty cranes.NXNHenan Dongqi Machinery Co., Ltd

Cast steel pulleyNXNHenan Dongqi Machinery Co., Ltd

Cast steel pulleyCast steel pulley has the features of higher strength and toughness but less manufacturability. Due do the high hardness on the surface, cast steel pulley may cause big wear damage to wire rope and are usually adopted by heavy duty conditions. As the large diameter pulley is concerned, the cast steel pulley are favored because the welding capability and comparatively light weight.NXNHenan Dongqi Machinery Co., Ltd

Nylon pulleyNXNHenan Dongqi Machinery Co., Ltd

Nylon pulleyNylon pulleys are widely used on the cranes. Nylon pulley has the features of light, wearable, and low stiffness.NXNHenan Dongqi Machinery Co., Ltd

Aluminum pulleyNXNHenan Dongqi Machinery Co., Ltd

Aluminum pulleyAluminum pulley is also widely adopted on the cranes. Aluminum pulley has the features of low hardness and low wear damage to wire rope.NXNHenan Dongqi Machinery Co., Ltd

DQCRANES can provide you optimal pulley for your material handling equipment. Free consultation and customized pulleys are available. DQCRANES is here to lift you up!NXNHenan Dongqi Machinery Co., Ltd

Crane services of DQCRANES

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