China manufacturer OEM Sand Casting Rebar CZPT for Building Grout Sleeve Buildings Cast Iron CZPT near me factory

Solution Description

WELCOME TO SUIJIN

ABOUT US
HangZhou Suijin machinery Technologies Co,.Ltd is a profational company in HangZhou town, our primary procedure is investment casting/precision casting and machining, for casting method, we have 2 types of manufacturing line, 1 is precision casting, an additional is h2o glass with competitive value.

Apart from the expenditure casting workshop and device workshop, we also offer the sand casting elements to satisfy the requirement for varial demand from our consumer.

CERTIFICATIONS
Our company received the ISO9001 and IATF16949 certification, and aslo we are awarded the new high-tech enterprice by Chinese federal government, and we have far more than 20 patent.

Benefits
 • A lot more than 10 a long time encounter on casting and machining
 • Superior inspection products to make certain the tolerance
 • Flexible PO QTY to meet up with buyer demand from customers
 • Specialist engineers in casting and machining
 • Aggressive value and exllent components quality
 • Close by HangZhou port, on-time shipping and delivery

Process Circulation

OEM&ODM Service
HangZhou suijin equipment technological innovation can provide the ODM&OEM support for consumer, and principal is ODM, we can producing the customized elements in accordance to Second&3D, we have professional R&D group can consider element in ealier development stage of the task.

AVALIABLE MATERIA & Surface Therapy

Product Application
Vehicle Components

 • Exhaust inlet/outlet cone                                 • Change sleeve                                 • Gas rail bracket  
 • Tempreture sensor boss                                  • Mounting Brackets                      • Oxygen sensor boss 
 • Brake balance block                                        • EGR sensor boss                              • Exhaust valve entire body

ARCHITECTURAL Components

 • Mounting Base                                • Mounting plate                                                 • Bearing Covers   
 • Coupling                                          • Grount sleeve                                                  • Sprockets
 • Handle                                             • regulation glass curtain wall accessories                  • Facet Plates                                                                                
AGRICULTURAL Machinery Parts

 • Tooth Blocks                                         • Observe shoes                                             • Bucket Teeth   
 • Observe Links                                           • Clamping                                                 • Mounting Brackets
 • Lifting Eyes                                           • Quick Joint                                              • Trencher Tooth     
                  
Maritime Hardware
 • Star handle                                              • Door hinge                                          • Folding Dock Cleat   
 • Mirror Polished Mooring                          • Hollow foundation boat rope cleat               • Mounting Brackets

VALAVE/PUMP

 • Valve body                                   • Explosion-proof valves                              • Pipe fitting              

Other individuals
The casting component is wildly use in the industries, this sort of as rail&transit parts, bicycle elements, casting impeller, foods machine sorting parts, solar mounting method areas, container protection areas, Electronic lock physique, robotic components and so on, we have a lot more than 20 patents relevant to this varieties of undertaking in manufacturing.    

Advanced EQUIPMENTS 

Our firm also equiped progress inspection products to fulfill the inspection requirement of the elements, so that we can sure the portion can have a excellent quality.

Primary Products Checklist

FAQ 

 

Avaliable Material
Carbon Steel  Alloy Steel High Chromium Cast Iron Low carbon steel
Stainless Steel Duplex Stainless Steel Steel bar Ductile Cast Iron
Surface treatment
Heat Treatment  Zinc Coating Blackening Mirror Polishing
Satin Polishing Electrolytic Polishing Shot Peening DACROMET

###

Magnetic defect inspection Spectrometer HB hardness inspection Mechanical inspection
Ultrasonic defect inspection Roughness tester HR hardness inspection CMM inspection
Metallographic detector X-ray inspection Dye penetrant inspection 100% Thread inspection

###

Q1 Are you factory or trading company?
A1 We are factory located in Ningbo city, China
Q2 What kinds of language is avaliable?
A2 English, Chinese, except email cummunication, we are ok with video meeting and calling.
Q3 How should I place an order?
A3 We are receive the PO and production drawing by email.
Q4 Which shipping methed is ok for you?
A4 Normally shipping by sea and train is use for mass production order delivery.
DHL,TNT,FedEx, UPS,EMS air shipment is use for sample delivery.
Q5 How can I contact you?
A5 You can contact us by email, and also we can chat by Skype, Teams, WhatsApp, Facebook.
Q6  What kinds of drawing format can be use?
A6 PRO/E, Auto CAD, Solid Works, IGS, UG, CAD/CAM/CAE, STEP.
Q7 Which packing material do you use for sea shipping?
A7 For sea shipping, we will packaging with European standard wooden pallet.
The parts will packing with PE bag inside the carton box.
Q8 How do you deal with the RFQ?
A8 Sales receiving the RFQ—Feasiblity study meeting with R&D engineer—Feed back technical issues with Customer—Sales quoted
Avaliable Material
Carbon Steel  Alloy Steel High Chromium Cast Iron Low carbon steel
Stainless Steel Duplex Stainless Steel Steel bar Ductile Cast Iron
Surface treatment
Heat Treatment  Zinc Coating Blackening Mirror Polishing
Satin Polishing Electrolytic Polishing Shot Peening DACROMET

###

Magnetic defect inspection Spectrometer HB hardness inspection Mechanical inspection
Ultrasonic defect inspection Roughness tester HR hardness inspection CMM inspection
Metallographic detector X-ray inspection Dye penetrant inspection 100% Thread inspection

###

Q1 Are you factory or trading company?
A1 We are factory located in Ningbo city, China
Q2 What kinds of language is avaliable?
A2 English, Chinese, except email cummunication, we are ok with video meeting and calling.
Q3 How should I place an order?
A3 We are receive the PO and production drawing by email.
Q4 Which shipping methed is ok for you?
A4 Normally shipping by sea and train is use for mass production order delivery.
DHL,TNT,FedEx, UPS,EMS air shipment is use for sample delivery.
Q5 How can I contact you?
A5 You can contact us by email, and also we can chat by Skype, Teams, WhatsApp, Facebook.
Q6  What kinds of drawing format can be use?
A6 PRO/E, Auto CAD, Solid Works, IGS, UG, CAD/CAM/CAE, STEP.
Q7 Which packing material do you use for sea shipping?
A7 For sea shipping, we will packaging with European standard wooden pallet.
The parts will packing with PE bag inside the carton box.
Q8 How do you deal with the RFQ?
A8 Sales receiving the RFQ—Feasiblity study meeting with R&D engineer—Feed back technical issues with Customer—Sales quoted

Screw Shaft Features Explained

When choosing the screw shaft for your application, you should consider the features of the screws: threads, lead, pitch, helix angle, and more. You may be wondering what these features mean and how they affect the screw’s performance. This article explains the differences between these factors. The following are the features that affect the performance of screws and their properties. You can use these to make an informed decision and purchase the right screw. You can learn more about these features by reading the following articles.

Threads

The major diameter of a screw thread is the larger of the two extreme diameters. The major diameter of a screw is also known as the outside diameter. This dimension can’t be directly measured, but can be determined by measuring the distance between adjacent sides of the thread. In addition, the mean area of a screw thread is known as the pitch. The diameter of the thread and pitch line are directly proportional to the overall size of the screw.
The threads are classified by the diameter and pitch. The major diameter of a screw shaft has the largest number of threads; the smaller diameter is called the minor diameter. The thread angle, also known as the helix angle, is measured perpendicular to the axis of the screw. The major diameter is the largest part of the screw; the minor diameter is the lower end of the screw. The thread angle is the half distance between the major and minor diameters. The minor diameter is the outer surface of the screw, while the top surface corresponds to the major diameter.
The pitch is measured at the crest of a thread. In other words, a 16-pitch thread has a diameter of one sixteenth of the screw shaft’s diameter. The actual diameter is 0.03125 inches. Moreover, a large number of manufacturers use this measurement to determine the thread pitch. The pitch diameter is a critical factor in successful mating of male and female threads. So, when determining the pitch diameter, you need to check the thread pitch plate of a screw.
screwshaft

Lead

In screw shaft applications, a solid, corrosion-resistant material is an important requirement. Lead screws are a robust choice, which ensure shaft direction accuracy. This material is widely used in lathes and measuring instruments. They have black oxide coatings and are suited for environments where rusting is not acceptable. These screws are also relatively inexpensive. Here are some advantages of lead screws. They are highly durable, cost-effective, and offer high reliability.
A lead screw system may have multiple starts, or threads that run parallel to each other. The lead is the distance the nut travels along the shaft during a single revolution. The smaller the lead, the tighter the thread. The lead can also be expressed as the pitch, which is the distance between adjacent thread crests or troughs. A lead screw has a smaller pitch than a nut, and the smaller the lead, the greater its linear speed.
When choosing lead screws, the critical speed is the maximum number of revolutions per minute. This is determined by the minor diameter of the shaft and its length. The critical speed should never be exceeded or the lead will become distorted or cracked. The recommended operational speed is around eighty percent of the evaluated critical speed. Moreover, the lead screw must be properly aligned to avoid excessive vibrations. In addition, the screw pitch must be within the design tolerance of the shaft.

Pitch

The pitch of a screw shaft can be viewed as the distance between the crest of a thread and the surface where the threads meet. In mathematics, the pitch is equivalent to the length of one wavelength. The pitch of a screw shaft also relates to the diameter of the threads. In the following, the pitch of a screw is explained. It is important to note that the pitch of a screw is not a metric measurement. In the following, we will define the two terms and discuss how they relate to one another.
A screw’s pitch is not the same in all countries. The United Kingdom, Canada, and the United States have standardized screw threads according to the UN system. Therefore, there is a need to specify the pitch of a screw shaft when a screw is being manufactured. The standardization of pitch and diameter has also reduced the cost of screw manufacturing. Nevertheless, screw threads are still expensive. The United Kingdom, Canada, and the United States have introduced a system for the calculation of screw pitch.
The pitch of a lead screw is the same as that of a lead screw. The diameter is 0.25 inches and the circumference is 0.79 inches. When calculating the mechanical advantage of a screw, divide the diameter by its pitch. The larger the pitch, the more threads the screw has, increasing its critical speed and stiffness. The pitch of a screw shaft is also proportional to the number of starts in the shaft.

Helix angle

The helix angle of a screw shaft is the angle formed between the circumference of the cylinder and its helix. Both of these angles must be equal to 90 degrees. The larger the lead angle, the smaller the helix angle. Some reference materials refer to angle B as the helix angle. However, the actual angle is derived from calculating the screw geometry. Read on for more information. Listed below are some of the differences between helix angles and lead angles.
High helix screws have a long lead. This length reduces the number of effective turns of the screw. Because of this, fine pitch screws are usually used for small movements. A typical example is a 16-mm x 5-inch screw. Another example of a fine pitch screw is a 12x2mm screw. It is used for small moves. This type of screw has a lower lead angle than a high-helix screw.
A screw’s helix angle refers to the relative angle of the flight of the helix to the plane of the screw axis. While screw helix angles are not often altered from the standard square pitch, they can have an effect on processing. Changing the helix angle is more common in two-stage screws, special mixing screws, and metering screws. When a screw is designed for this function, it should be able to handle the materials it is made of.
screwshaft

Size

The diameter of a screw is its diameter, measured from the head to the shaft. Screw diameters are standardized by the American Society of Mechanical Engineers. The diameters of screws range from 3/50 inches to sixteen inches, and more recently, fractions of an inch have been added. However, shaft diameters may vary depending on the job, so it is important to know the right size for the job. The size chart below shows the common sizes for screws.
Screws are generally referred to by their gauge, which is the major diameter. Screws with a major diameter less than a quarter of an inch are usually labeled as #0 to #14 and larger screws are labeled as sizes in fractions of an inch. There are also decimal equivalents of each screw size. These measurements will help you choose the correct size for your project. The screws with the smaller diameters were not tested.
In the previous section, we described the different shaft sizes and their specifications. These screw sizes are usually indicated by fractions of an inch, followed by a number of threads per inch. For example, a ten-inch screw has a shaft size of 2” with a thread pitch of 1/4″, and it has a diameter of two inches. This screw is welded to a two-inch Sch. 40 pipe. Alternatively, it can be welded to a 9-inch O.A.L. pipe.
screwshaft

Shape

Screws come in a wide variety of sizes and shapes, from the size of a quarter to the diameter of a U.S. quarter. Screws’ main function is to hold objects together and to translate torque into linear force. The shape of a screw shaft, if it is round, is the primary characteristic used to define its use. The following chart shows how the screw shaft differs from a quarter:
The shape of a screw shaft is determined by two features: its major diameter, or distance from the outer edge of the thread on one side to the inner smooth surface of the shaft. These are generally two to sixteen millimeters in diameter. Screw shafts can have either a fully threaded shank or a half-threaded shank, with the latter providing better stability. Regardless of whether the screw shaft is round or domed, it is important to understand the different characteristics of a screw before attempting to install it into a project.
The screw shaft’s diameter is also important to its application. The ball circle diameter refers to the distance between the center of two opposite balls in contact with the grooves. The root diameter, on the other hand, refers to the distance between the bottommost grooves of the screw shaft. These are the two main measurements that define the screw’s overall size. Pitch and nominal diameter are important measurements for a screw’s performance in a particular application.

Lubrication

In most cases, lubrication of a screw shaft is accomplished with grease. Grease is made up of mineral or synthetic oil, thickening agent, and additives. The thickening agent can be a variety of different substances, including lithium, bentonite, aluminum, and barium complexes. A common classification for lubricating grease is NLGI Grade. While this may not be necessary when specifying the type of grease to use for a particular application, it is a useful qualitative measure.
When selecting a lubricant for a screw shaft, the operating temperature and the speed of the shaft determine the type of oil to use. Too much oil can result in heat buildup, while too little can lead to excessive wear and friction. The proper lubrication of a screw shaft directly affects the temperature rise of a ball screw, and the life of the assembly. To ensure the proper lubrication, follow the guidelines below.
Ideally, a low lubrication level is appropriate for medium-sized feed stuff factories. High lubrication level is appropriate for larger feed stuff factories. However, in low-speed applications, the lubrication level should be sufficiently high to ensure that the screws run freely. This is the only way to reduce friction and ensure the longest life possible. Lubrication of screw shafts is an important consideration for any screw.

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