Product Description

Product Description
Zinc Alloy Die Cast Pulley Single/Double Wheel Rigid Eye with Steel wheel
Zinc Alloy Die Cast Pulley Single/Double Wheel Rigid Eye with Nylon wheel
Zinc Alloy Die Cast Pulley Single/Double Wheel Swivel Eye with Steel wheel
Zinc Alloy Die Cast Pulley Single/Double Wheel Swivel Eye with Nylon wheel
Technical Data and Dimensions
Zinc Alloy Die Cast Pulley Single Wheel with Nylon wheel

Size	Total Length	Eye Dia.	Weight Each
(mm.)	(mm.)	(mm.)	(Kg.)
15	49	10	0.571
20	59	11	0.036
25	70	12	0.052
30	76	13	0.077
40	90	16	0.110
50	110	17	0.175
65	133	18	0.360

Zinc Alloy Die Cast Pulley Double Wheel with Nylon wheel

Size	Total Length	Eye Dia.	Weight Each
(mm.)	(mm.)	(mm.)	(Kg.)
15	49	10	0.034
20	58	11	0.055
25	70	12	0.072
30	80	13	0.115
40	90	16	0.190
50	100	17	0.293

Zinc Alloy Die Cast Pulley Double Wheel with Steel wheel

Size (D)	Rope Dia.	Weight Each
(in.)	(in.)	(Kg.)
1/2	5/32	0.571
3/4	3/16	0.040
1	1/4	0.073
1-1/4	5/16	0.126
1-1/2	3/8	0.142
2	7/16	0.283

Zinc Alloy Die Cast Pulley Single Wheel with Steel wheel

Size (D)	Rope Dia.	Weight Each
(in.)	(in.)	(Kg.)
1/2	5/32	0.571
3/4	3/16	0.040
1	1/4	0.073
1-1/4	5/16	0.126
1-1/2	3/8	0.142
2	7/16	0.283

*Other main type of Blocks are in following picture. You can contact our sales for products details.

BUSINESS FAQ: 

1) What is the MIN order quantity ?
USD 1580 in total value, usually 1 ton.

2)What is the delivery time?
15 -20 days since received the deposit.

3)What is the Payment term?
A. 30% TT deposit, the balance against copy B/L.
B. Irrevocable L/C at sight.
C. Other payment can be negotiated.

4)Could I get free samples before first cooperation? 
Yes, of course! But the buyer need to afford express fee, which is returnable once we build cooperation.

5)What's the packing method?
Packing methods for most of the products are in the cartons or polywood case.Special packages are available upon
customers'need. You can contact us for special or more detailed packages.

Why choose CZPT (lift-sunny )

1). "ONE-STOP" Rigging and Marine supplier:  a great variety of rigging and marine products including 1,000 kinds
of products, 3,000 kinds of specifications, which are widely used in Construction,Transportation, Forestry, Oil&Gas,
Agriculture, Utilities, Aerospace, Marine, Manufacturing, Mining, Fishing and Government. 

2). Old history: since 1986, more than 30 years focus on rigging, marine and rubber products.
The founding principles of the company have never changed-business integrity,quality is everything.

3). Strong development capabilities: processing with Given materials and samples at own
module workshop, save cost, finish customers special and big order rapidly.

4). 4 round Superior Quality Control with 10 years records and zero complaint: 
4 round quality inspection including raw materials, production, finished products, final package, have a thorough
quality control system, professional staff, every step is under strict inspection, to insure 
that every product is perfect.For the individual and mass production part, the records which include the
sub-contractor records will be retained at least 10 years since the record has been made,
(e.g. inspection/test record, control plan, etc)
In the past years,the complaint rate of product quality from more than 50 countries customers is zero.

5). Certificate of Quality: ISO9001, CE, GS, CCS, ABS, BV, KR, REACH, etc. Photos as below.

6). Reasonable and Competitive price compared with others with same quality.

7). Fast Delivery time: within 20 days for most products.

8). Comfortable and topping after-sales service with 99.8% satisfaction rate for more than
50 countries and regions: We will send you "Customer Satisfaction Inventory" after you receive our first order.
If you are not satisfied with our quality,price or service, please list your comments or suggestions, the next day, our
senior manager will personally call you or email you, apologize to you, to solve your problem.Because day after day,
year after year of self-correction, our current customer satisfaction rate has reached 99.8%. we are very proud of this.
Of course, we still need to continue to work hard.Our main marketing as below picture.

9). Great Supports for marketing. With us, your money and business in safe.If you want to be
No.1 you should contact with us right now!

 

The importance of pulleys

A pulley is a wheel that rides on an axle or axle. The purpose of the pulley is to change the direction of the tensioning cable. The cable then transfers the power from the shaft to the pulley. This article explains the importance of pulleys and demonstrates several different uses for this machine. Also, see the Mechanical Advantages section below for the different types. let's start.

simple machine

A simple pulley machine is a device used to transfer energy. It consists of a wheel with flexible material on the rim and a rope or chain tied to the other end. Then lift the load using the force applied to the other end. The mechanical advantage of this system is one, as the force applied to the load is the same as the force on the pulley shaft.
A simple pulley machine has many benefits, from the ability to build pyramids to building modern buildings with it. Pulleys are also popular with children because they can perform simple tasks such as lifting toys onto a slide, sliding them off the slide, and lifting them up again. These activities, called "transportation" by child development theorists, allow them to learn about the physics of simple machines in the process.
The mechanism works by using cables to transmit force. The cable is attached to 1 side of the pulley and the other side is pulled by the user. Lift the load by pulling on 1 end and the other end of the rope. Simple pulley machines have many commercial and everyday applications, including helping move large objects. They can be fixed or movable, and can be a combination of both. The present invention is a great tool for any beginner or engineer.

axis

The axle wheel is the basic mechanical part that amplifies the force. It may have originally appeared as a tool to lift buckets or heavy objects from a well. Its operation is demonstrated by large and small gears attached to the same shaft. When applied to an object, the force on the large gear F overcomes the force W on the pinion R. The ratio of these 2 forces is called the mechanical advantage.
The ideal mechanical advantage of shaft pulleys is their radius ratio. A large radius will result in a higher mechanical advantage than a small radius. A pulley is a wheel through which a rope or belt runs. Often the wheels are interconnected with cables or belts for added mechanical advantage. The number of support ropes depends on the desired mechanical advantage of the pulley.
In the design of the axle wheel, the axle is the fulcrum and the outer edge is the handle. In simple terms, wheels and axle pulleys are improved versions of levers. The axle pulley moves the load farther than the lever and connects to the load at the center of the axle. Shaft pulleys are versatile and widely used in construction.

rope or belt

Ropes or pulleys are mechanical devices used to move large masses. The rope supports a large mass and can be moved easily by applying a force equal to 1 quarter of the mass to the loose end. Quad pulleys have 4 wheels and provide the mechanical advantage of 4 wheels. It is often used in factories and workshops. It is also a popular choice in the construction industry. If you are installing a pulley in your vehicle, be sure to follow these simple installation instructions.
First, you need to understand the basics of how a rope or pulley works. The machine consists of 1 or more wheels that rotate on an axle. The rope or belt is wrapped around the pulley and the force exerted on the rope is spread around the pulley. It then transfers the force from 1 end of the rope to the other. The pulley system also helps reduce the force required to lift objects.
Another common rope or pulley is the differential pulley. This is similar to a rope pulley, but consists of 2 pulleys of different radii. The tension in the 2 halves of the rope supports half the load that the live pulley should carry. These 2 different types of pulleys are often used together in composite pulley systems.

Mechanical advantage

The mechanical advantage is the ratio of the force used to move the load through the pulley system to the force applied. It has been used to measure the effectiveness of pulley systems, but it also requires assumptions about applied forces and weights. In a simple 1:1 pulley system, the weight lifting the weight is the same as the weight of the person pulling the weight. Adding mechanical advantage can help make up for the lack of manpower.
This advantage stems from the mechanical properties of simple machines. It requires less force and takes up less space and time to accomplish the same task. The same effect can also be achieved by applying less force at a distance. Furthermore, this effect is called the output force ratio. The basic working principle of a pulley system is a rope with a fixed point at 1 end. The movable pulley can be moved with very little force to achieve the desired effect.
The load can be moved through the vertical entry using a simple pulley system. It can use a simple "pulley block" system with a 2:1 "ladder frame" or a 4:1 with dual pulleys. This can be combined with another simple pulley system to create a compound pulley system. In this case, a simple pulley system is pulling another pulley, giving it a 9:1 mechanical advantage.

Commonly used

You've probably seen pulley systems in your kitchen or laundry room. You probably already use it to hang clothes on an adjustable clothesline. You may have seen motor pulleys in the kitchens of commercial buildings. You might even have seen 1 on a crane. These machines use a pulley system to help them lift heavy loads. The same goes for theaters. Some pulleys are attached to the sides of the stage, enabling the operator to move up and down the stage.
Pulley systems have many uses in the oil and petroleum industry. For example, in the oil and gas industry, pulley systems are used to lay cables. They are arranged in a pulley structure to provide mechanical energy. When the rope is running, 2 pulleys are hung on the derrick to facilitate smooth running. In these applications, pulleys are very effective in lifting heavy objects.
A pulley is a simple mechanical device that converts mechanical energy into motion. Unlike chains, pulleys are designed to transfer power from 1 location to another. The force required to lift an object with a pulley is the same as that required by hand. It takes the same amount of force to lift a bucket of water, but it's more comfortable to pull sideways. A bucket of water weighs the same as when lifted vertically, so it's easy to see how this mechanism can be useful.

Safety Notice

When using pulleys, you should take several safety precautions to keep your employees and other workers on the job site safe. In addition to wearing a hard hat, you should also wear gloves to protect your hands. Using pulleys can lead to a variety of injuries, so it's important to keep these precautions in mind before using pulleys. Here are some of the most common:
Pulleys are an important piece of equipment to have on hand when lifting heavy objects. Pulleys not only reduce the force required to lift an object, but also the direction of the force. This is especially important if you are lifting heavy objects, such as a lawn mower or motorcycle. Before starting, it is important to make sure that the anchoring system can support the full weight of the object you are lifting.
When using a pulley system, make sure the anchor points are adequate to support the load. Check with the pulley manufacturer to determine the weight it can safely lift. If the load is too large, composite pulleys can be used instead. For vertical lifts, you should use a sprocket set and wear personal protective equipment. Safety precautions when using pulleys are critical to worker health and safety.