China wholesaler High Efficiency Twin Screw Press and Screw Press Shaft for Industrial Sewage threaded shaft for garage door opener

Product Description

Product Description

Screw concentrating press is designed and developed by our company by working with internationally leading press enterprises, and is mainly used for pressing and dehydrating various material containing fiber. It finds extensive applications in many industries such as fish meal, bone meal, meat meal, starch, fermentation broth, forage, papermaking, bagasse, pectin, pharmacy, sewage treatment, etc.

Twin screw design ensures excellent squeezing performance.
Integrated structure, easy for installation and shifting .

1. twin screw design ensures excellent squeezing performance.
2. Integrated structure , easy for installation and shifting .
3. electromagnetic speed variable motor, with wide range of speed, applied to various 
raw fish species.
4.  stainless steel crust and mesh plates for the better corrosion resistance.
5.  equipped with gear surface hardened reducer, low noise and long life.

Work Principle

  1. A pair of variable diameter shatis and variable pitch screws run in opposite direction and squeeze out the liquid through filtration. It is featured by high extraction efficiency, small damage to materials, less loss of materials and convenient operation.
  2. Slurry enters the machine through the feeding inlet and pushed by rotation of the variable diameter screw shati in the opposite direction. Screw blades and spindles are designed to have a varying pitch and a varying diameter, the gap from the feeding inlet to outlet of spiral blade gets smaller but spindle diameter gets bigger so that the volume of the slurry in the screen is gradually compressed and mixed slurry is discharged through the screen under the squeezing action, and the liquid is continuously separated from the slurry.
  3. The solid-fluid separation system comprises of a bridge, a sieve plate, a screen and a screw shati, which are fixed by screws on the base for support of filtration and dehydration of materials during extrusion. The aperture of sieve plate is 0.1-5 mm to avoid loss of big particles.
  4. Compression ratio is big with good dehydration efficiency, water content of output is low, operation is stable and free of vibration, and consecutive production can be achieved.

Product Parameters

Model TP-24 TP-35 TP-41 TP-49 TP-56 TP-64 TP-1000 TP-1500 TP-2000 TP-3000
Production capacity (t/h) 2.5 5 13 18 25 50 50 75 100 150
Screw speed (r.p.m) 1-11
Motor power(M) 11 18.5 30 45 55 90 90 200 250 355
Equipment weight(t) 4 8 10 14 21 28 28 48 75 118


Company Profile

Located in Fangqiao National Machinery Industrial Park, at the Xihu (West Lake) Dis. Lake, HangZhou City, ZheJiang , China, ZheJiang STORD WORKS home to more than 180 employees , covers an area of 25000 M2 and has more than 70 various manufacturing and testing devices,with the maximum lifting capacity of 100T and the maximum plate rolling capacity of 120mm.

StordWorks has the specialized drying machine production workshop and advanced machining centers. We also have various international pressure vessels certification and abundant experiences in equipment manufacturing, such as National standard pressure vessel certification, American ASME certification, Norske Veritas DNV certification and EU PED certification.

ZheJiang StordWorks adheres to the business philosophy of “Focusing on Professionalism & Quality First”, and the service concept
of “Customer-orientation and Exceeding Customer Satisfaction”. By means of our excellent quality and perfect service, JiagnsuStord Works Ltd. sincerely looks forward to cooperating with you!

Packaging & Shipping

1) Carefully check the quantity and quality of equipment before packing.
2) Good packed by plastic wrap.
3) Fittings and spare parts are packed in wooden pallet .
4) Suitable for export transport and sea freight.
5) Add labels and shipping mark.

Why Choose us

• 1. We are manufacture workshop, we can provide the high quality products with factory price and communicate with you at any time in production.
• 2. We have wide range of processing equipments and advanced testing machine, which can guarantee us to manufacture the better quality products.
• 3. We serve every customer who comes to consult with our utmost sincerity
• 4. We have obtained the pressure vessel production license, pressure vessel design certificate, ISO9001, ISO14000, ASME, DNV, SGS, PED certificates. 
• 5. After years’ of hard working, Our cooperative partners are all around the world. We warmly invite customers to take part in our New Year celebration party.



After-sales Service: Commissioning on Site
Warranty: 12 Months
Type: Rotary Drying Equipment


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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.


What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are two types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The two types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are two types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in two stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to six times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are two different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.


Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each one is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the two materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.

China wholesaler High Efficiency Twin Screw Press and Screw Press Shaft for Industrial Sewage   threaded shaft for garage door openerChina wholesaler High Efficiency Twin Screw Press and Screw Press Shaft for Industrial Sewage   threaded shaft for garage door opener
editor by CX 2023-11-23