China SEEPEX Spare Part Coupling Rod Bush shaft Seal plug in shaft what is a screw shaft

Warranty: 1 Year
Applicable Industries: Building Material Shops, Manufacturing Plant, Machinery Repair Shops
Weight (KG): 5
Showroom Location: None
Video outgoing-inspection: Not Available
Machinery Test Report: Not Available
Marketing Type: New Product 2571
Warranty of core components: 1 Year
Core Components: Pump
Structure: screw pump
Material: Stainless Steel, Stainless Steel
Coatings: Black Oxide
Model Number: BN1-24
NEMA: coupling rod bush
Packaging Details: Carton packaging for a single product A number of products with wooden box packaging, each box does not exceed 30 kg
Port: HangZhou City of China

Screw pump Coupling Rod bush action
The function is to support the shaft, avoid grinding of direct drive shaft and coupling rod, Reduce the damage on the drive shaft and a shaft coupling device, play a protective effect, and make the shaft CZPT rotary motion in the bushing.
Bushing can not only reduce the wear, vibration and noise of equipment, and has the effect of corrosion prevention. It can also facilitate the maintenance of mechanical equipment, simplify the structure and manufacturing process of equipment

Screw pump Coupling Rod bush material
Commonly used materials are 45 steel, 40Cr alloy steel, medium carbon steel, bearing steel GCr15 and spring steel 65Mn, as well as 20CrMoTi, 20Mn2B, 20Cr, etc.

The material of Coupling Rod bush my company commonly used :
SUS304; SUS316L

Design and application of screw pump Coupling Rod bush
Screw pump bushing is used for coupling rod ends, which is an important part of the universal joint assembly of connecting the rotor and the drive shaft

In these moving parts, due to the friction of the long-term caused by friction, parts need to be replaced when Parts need to be replaced when the axial gap and hole wear to a certain degree of time, Therefore, we must select the material with better wear resistance for the bushing, which can reduce the wear and tear between the shaft to shaft. We must choose a better wear resistance material for the bushing, which can reduce the wear between the shaft and the shaft. When the bushing is worn to a certain extent, it can be replaced, so that it can save the high cost caused by the replacement shaft. When the bushing is worn to a certain extent, it will be replaced, this can save the high cost of replacement shaft, In general, the installation of bushing and shaft is clearance fit, this installation method cannot avoid wear, can only choose to extend the life of parts, The bushing type parts are relatively easy to produce,, the cost is relatively low.

S T D factory availability
1)There are all kinds of accessories in the S T D’s factry, we offer a fast turnaround to help reduce the downtime of equipment, you don’t need to have a lot of inventory.
2)For the spare parts, can be quickly shipped, to ensure that the production won’t be interrupted or reduced to the minimum downtime. With good service and very competitive price, customer can earn time an profit from the cooperation with us.

Highly competitive pricing
During customers become more and more focused on running and maintaining costs,in evaluating the conservation and efficiency of factory, we need to consider priority the price and supply capacity of spare parts.

STD company is using their engineering knowledgeand production capacity, is capable of producing excellent quality and price competitiveness spare parts ( the spare parts of NETZSCH, SPEEDEX, MONO ,VISCOTEC, STD etc. )

Quality Assurance
S T D is a professional R & D and manufacturer of single screw pump and the spare parts, product quality was inspected and approved by customers in professional market, has won customer’s recognition and highly praise.

S T D Universal Parts overview
S T D has a reputation for quality in both equipment and parts. Over recent years it has been our mission to use our manufacturing and engineering expertise to expand our product offering to include a range of high quality S T D Universal Parts, suitable for many other brands of progressing cavity (PC) pumps.
We provide S T D Universal Parts to be used with the following ranges of other brands of progressing cavity pumps. For others not listed, please contact S T D

International excellent brand screw pump parts supply
STD use their own expertise, manufacturing capabilities and channels to provide the world’s major brands (Germany’s Netzsch,Seepex, Mono,and so on) a full range of screw pump parts, these accessories performance is good, rugged, durable, including: stator, rotor, transmission shaft, joint shaft, PIN, PIN, or a complete set of rotating parts, etc.





1)What products does S T D offer ? STD offers screw pump, Screw pump accessories, and the global solution of the fluid system product.
The product range summary of STD
Progressive cavity pumps for conveying and metering low to highly viscous media with or without solids
Macerators for macerating solid and fibrous components in the medium
Control systems for monitoring, regulating and controlling processes
Services: consulting, commissioning, maintenance, NETZSCH ,SEEPEX, and MONO Universal Spare parts, repairs and various service contracts
2)Does S T D supply custom-made pumps ?
Yes, this is our specialty, we customize different design and material combinations for each application’s modular system. This means that we develop the best technology and the most economical solution for your needs.
3)Can S T D spare parts be ordered online ? Yes, S T D screw pumps and spare parts as well as other brands (NETZSCH,SEEPEX.MONO) Universal accessories can be ordered online. For order please contact us.
4)How fast can my S T D pump be delivered ?
Normally, standard pumps are delivered in 4 to 6 weeks. In urgent cases, delivery times between 2 to 5 days may be possible. Please contact us .Telephone: –
1) Standard export packing: We will pack pump and accessories in wooden boxes, put into container. shipmentby sea and air. .
2) The marks on the packing box are executed according to the international standard
3) Please check the packaging and integrity of goods when receiving them, Ifany damaged, please immediately report to the carrier.
4) Please kindly notice us if you have special packing requirements.
6)Product quality guarantee
According to the international standard, whole pump 1 year warranty,
Spare parts 6 months warranty

Buyers Attention:
1)Can screw pump dry running ?
No, the conveying elements are permanently in contact with 1 another, which means that dry running must be avoided in progressive cavity pumps. The S T D dry-running protection device offers reliable protection.
2)What temperatures is suitable for using S T D pump ? S T D progressive cavity pumps can be used at temperatures from -20 °C to 150° C (-4 to 302° F).

Company Introduction
ZheJiang Standard Fluid Systems Co., Ltd. the largest professional manufacturer in South China about : screw pump, screw valve, emptying system screw products
The screw pump, screw valve, emptying system screw products are advanced technology, perfect structure, various forms, complete specifications, durability, is widely used in sewage treatment, chemical industry, paper, food processing, pharmaceutical, energy, environmental protection, 3D printing and other industries.
The company has an experienced, mature technology, high-quality, reliable screw pump design, manufacturing, testing, after-sales service engineer team. To provide customers with high quality products, excellent solutions and efficient services in the field of fluid systems.
In the production, research and development of screw pump products at the same time, also provides global screw products general accessories (including Germany’s Netzsch,Seepex,Viscotec, the British mono, and other branded accessories) and maintenance and custom services, and provide free technical advisory services and improved optimization design. Our excellent processing capacity, rich practical experience and mature technical advantages for our products provide a stable guarantee.

Our services
1 Our screw pump series products, reasonable price, quality service, provide quality inspection. Welcome to sample Custom-made.
2 we have a special quality Supervision Department to ensure the quality of mass production.
3 If the product has quality problems, we will deal with the first time, find out the cause, take responsibility.
4 If you are interested in our products and companies, please leave a message or email us, we will give you an answer within 24 hours

Why choose us ?
1 Factory Direct Sales, no intermediate links, competitive price
2 Our machines are imported from Europe, the original machine factory, the production of stable product quality, do not use low quality equipment.
3 Ensure on-time delivery, procurement, we can provide the best quality of service control, transportation, documentation and so on.
4 We provide samples and OEM services.
5 We will reply to your enquiry within 24 hours.
6 More than 20 years of experience in this industry business, and professional team, so that our customers feel relaxed and comfortable working with us in
7 Please contact us by email and we will send you more pictures for more choices of our products.
How to make an order for S T D screw pump ?
1) Sample approval
2) Client arrange 30% deposit after receiving our PI(proforma invoice),
3) We start bulk production and finish production within agreed lead time
4) We send shipping documents to client
5) Client arrange balance payment
6)We arrange shipment , and send original documents or telex release the goods

Add: No, 2 Hengfong Road, Science Technology Industrial Park, Xihu (West Lake) Dis. District, HangZhou City, ZheJiang Province, China
Attn: Ms. June Zhang

Screw Shaft Types

If you’re looking for a screw shaft, but aren’t sure which type to buy, you’re in luck. In this article, we’ll talk about the different types, including Threaded shank, Round head, and Machined. Once you’ve read it, you’ll know which type to buy. Then, you can decide whether you want a ball screw nut or a threaded shank.

Machined screw shafts

Besides the standard stainless steel shaft, manufacturers also provide a variety of other materials, such as titanium, bronze, and brass. In addition to stainless steel, manufacturers also provide a variety of top-coating options, including zinc, brass, and chromium. Aluminum screws are not particularly durable and are easily affected by weather. Most screw shafts feature self-locking mechanisms. They are especially useful in C-clamps, vises, and screw-top container lids.
For applications where accuracy is vital, a ball screw shaft needs to be annealed. A heat treatment can be performed on the ball screw shaft to ensure that both ends are heated evenly. In this process, the shaft will be more durable, while maintaining its high-precision properties. These screw shafts are a key component in computer-controlled motion-control systems, wire bonding, and other industries that require high-precision and high-quality performance.
Depending on the material used, screw shafts can be made of stainless steel or titanium. High-precision CNC machines and lathes are typically used to manufacture screw shafts. Various shapes and sizes are available, each with a specific application. Whether you need a small or large screw, you can find one to fit your needs. And since each size requires a different material, your choice of material is important as well.
In general, the materials used for machining screw shafts are steel, stainless steel, titanium, brass, bronze, and aluminum. Metals that resist corrosion are also commonly used. Other materials for screw shafts are Teflon, nylon, and nylon. You can also find threaded screw shafts in materials such as porcelain, glass, and ceramic. If you want to use your screws in a unique material, consider purchasing a customized one.

Ball screw nuts

If you have a screw shaft, the last thing you want to worry about is the ball nut slipping off. To prevent this, you can place a temporary stop in the shaft’s grooves to ensure that the ball nut does not slide off. When you remove the stop, you can then install the ball screw nut. But, before you can install the ball screw nut, you have to make sure that you have a good grip on the shaft.
When selecting ball screw nuts, it’s important to consider how much preload you need to apply to avoid excessive backlash. Preloading eliminates this problem by making the ball nut compact. It also prevents backlash, which is lost motion caused by clearance between the ball and nut. Backlash disrupts repeatability and accuracy. This is where spacer preloading comes in. You can insert a spacer between the two ball nuts to transmit the force to the nut. However, you should keep in mind that this method reduces the load capacity of the ball screw.
The critical speed of a screw is the maximum rotating speed before it whips. This critical speed is influenced by several factors, including the diameter of the screw shaft, the number of support elements, and the material. By adjusting these factors, you can reduce the number of components used and the amount of time it takes to assemble the screw shaft. In addition, you can also reduce the number of components and avoid stacking tolerances. However, the critical speed of plastic nuts is limited due to sliding friction.
The ball screw nut has several characteristics that make it unique. Its most prominent feature is the presence of ball bearings. These balls help reduce friction between the screw nut and the shaft. Without ball bearings, the friction would be too high to function properly. Another important characteristic is the groove profile of the nut and ball. These two features ensure that the ball and the nut meet at two points. You’ll be amazed by the results of the work of these ball screw nuts.

Threaded shank

Wood screws are usually not fully threaded because the shank has an unthreaded portion at the top. This shoulder part forces the screw to compress two pieces of wood, which prevents the screw from overheating and compromising the materials strength. As the screw is threaded partially up, it is not as difficult to remove as a fully threaded screw. However, it is important to note that a wood screw will not hold as tightly as one with a fully threaded shank.
In addition to being universal, screw threads can be of different sizes. For example, a M8 screw has a thread pitch of 1.25 mm. To avoid confusion, screw thread pitches are commonly given with a multiplication sign. For example, M8x1 means that the screw is eight mm in diameter but has a thread pitch of one mm per 360-degree rotation. Those who are not familiar with these dimensions may find it confusing.
The OD of the threaded portion of a bolt is generally smaller than the OD of the nut. If the shank is too deep for the nut to fit, the threads may bottom out. This is why it’s important to use a thread-cutting bit with a small thread diameter. You can use a micrometer or caliper to measure the thread diameter. This tool will also allow you to easily identify which screw size fits where and how well.
The metric system is the most widely used. Fasteners with DIN numbers are generally metric in size. This makes them very useful for industrial settings. You can find metric-sized screws anywhere, as long as you buy them from a reputable manufacturer. These fasteners also come with a dog point, which is used for safety wire. If the screw needs to be replaced, the shank can be drilled with a hole for a safety wire or for a dog-point.

Round head

A round head screw is the most common type used for machine screws. Other common types include truss head, flat head, and hexed head. Each has a different profile and are used for different purposes. A round head screw is typically wider than a flat or a hexed head, and has a slightly rounded surface. These screws are useful for projects involving sheet metal or sheet-metal parts. Round heads are usually slightly wider than a hex head screw, and they may also be used as a substitute for washers in certain applications. However, truss heads are not necessary for every project.
A wood screw has a smooth shank that protrudes above the surface of the material it is attaching. A metal screw has a threaded shaft that is fully threaded from head to point, and a fully threaded shaft provides more bite. Two common head styles are round head and pan head. If the task requires the screw to be flush or countersunk, the round head will be the best choice.
Another type is the Reed & Prince screw drive. These are similar to Phillips screws but have a 75-degree V shape. They are commonly used in marine hardware and are also known as BNAE NFL22-070. This type is also used for steel plate hangers. In addition to round head and pan head screws, there are a variety of other screw types. You can even get a head with a slotted head if you know where to look.
Screw diameters are specified according to the ISO 261 or ISO 262 standards. An M8 screw has a diameter of 8.25 mm. The M8 screw has a pitch of 1.25 mm, which is equivalent to one mm per 360 degrees. There are several other standard screw sizes and thread diameters available. You can find them all by consulting the relevant standards. But remember, the metric system is the most popular.

Self-locking mechanism

A self-locking mechanism for a screw shaft is a device that secures the screw to its supporting member in a failure position. The locking mechanism provides a positive connection between the screw shaft and the control surface during normal operation, and locks the screw to its supporting member when the screw fails. Previous attempts to solve this problem have typically used secondary nuts with free play on the screw, which were intentionally designed to jam when loaded. However, such a device can be unreliable, which is why the present invention offers a more robust and reliable locking mechanism.
The self-locking function of a screw depends on several factors, including its pitch angle and the coefficient of friction of the threads. The angle of friction must be less than the tangent of the material pairing to prevent untightening of the screw. Screws with self-locking mechanisms have an efficiency e lower than 50%, which is less than half. Self-locking screws also have the benefit of being less efficient than a standard screw.
Unlike a normal screw, a self-locking screw can be turned in either direction. The nut 22 rotates with the screw shaft, and the member 23 is translated in an axial direction. Regardless of the direction of the rotation of the screw, this axial translation will result in the opposite moment to that input moment. While screw self-locking mechanisms are typically less expensive, they are more reliable and durable.
Another important feature of self-locking screws is that they are not susceptible to independent loosening. The screw cannot rotate without a certain amount of torque. In addition, a self-locking screw shaft must have a small wedge with a smaller half-angle than the arctangent of the static friction. This means that the torque applied by the driver must be greater than the torque needed to overcome the friction.

China SEEPEX Spare Part Coupling Rod Bush shaft Seal plug in shaft     what is a screw shaftChina SEEPEX Spare Part Coupling Rod Bush shaft Seal plug in shaft     what is a screw shaft
editor by czh

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