China China Manufacturer Nieman Swl Series Worm Screw Jack With High Quality screw conveyor shaft alignment

Warranty: 1 Years
Applicable Industries: Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Construction works , Energy & Mining
Weight (KG): 15 KG
Customized support: OEM
Gearing Arrangement: Worm
Output Torque: 2000N.m
Input Speed: 1500rpm
Output Speed: 150rpm
Product Name: China Manufacturer Nieman Swl Series Worm Screw Jack With High Quality
Material: Cast Iron or Stainless Steel
Mounting Position: Foot Mounted or Flange Mounted
Bearing Range: 2T-150T
Certification: ISO9001
Technical Support: 3D & CAD drawing
Input Form: Motor, IEC Flange, etc
Screw Range: 5-16mm
Structures: motor direct connection, single & double shaft
Application: Power Transmission
Packaging Details: Nieman packing conforms to the national standard (GB/ t13384-92) and uses fumigation-free plywood material.The corners of the cases are fixed with angle guards and the products are packaged in closed plastic bags before outer packaging is applied. In the closed plastic bags, a moisture-proof agent is placed to ensure the integrity and safety of the goods in transit.
Port: ZheJiang , HangZhou, ZheJiang

PRODUCT SPECIFICATIONS SWL SeriesSwl series worm screw lift is a kind of basic lifting component, which can lift, lower, propel, turn and other functions through the worm drive screw.Screw jack can be widely used in machinery, metallurgy, construction, chemical, medical, cultural and health, and other industries. Can according to a certain procedure to accurately control the adjustment of the height of ascension or propulsion, can be directly driven by motor or other power, can also be manually. This series of worm screw lift can be self-locking, with the bearing capacity ranging from 2.5 tons to 120 tons, the maximum input speed of 1500 r/min, and the max lifting speed of 2.7 m/min. Features:1. Suitable for heavy load, low speed and low frequency; inch size needle roller bearing HJ162416 USA torrington needle bearing 2. Main components: precision trapezoid screw pair and high precision worm gear pair.3. Compact design, small volume, light weight, wide drive sources, low noise, easy operation, convenientmaintenance. 4. The trapezoid screw has self-locking function, it can hold up load without braking device when screw stops traveling. 5. The lifting height can be adjusted according to customer requirements. 6. Widely applied in industries such as machinery, metellurgy, construction and hydraulic equipment.7. Top End: top plate, clevis end, threaded end, plain end, forked head and rod end. Screw head type/End Fittings : Cylindrical/Clevis Type, Flange Type, Thread Type, Flat head Type , Forked head Type, Rod head type . The power source can be equipped with motor, servo motor and handwheel,How To Confirm the required Model

TypeModelScrew thread sizeMaxlifting strengthkNMaxpull forcekNWeight without strokekgScrew weightper 100mm
SWL Screw jackSWL2.5Tr30*625257.30.45
Product Video Nieman Top Quality Screw Jacks main components with international standard materials: – Trapezoidal lifting screw (worm screw) with C45 Steel. – Worm gear (worm wheel) with Bronze. – Traveling nut (loading nut, lifting nut) with Bronze. – Safety nut with Bronze. – Drive shaft (worm) with C45 Steel, heat treatment. – Jacks Housing (gearbox) with Ductile Iron. Successful Project Product packaging Package Nieman packing conforms to the national standard (GB/ t13384-92) and uses fumigation-free plywood material.The corners of the cases are fixed with angle guards and the products are packaged in closed plastic bags before outer packaging is applied. In the closed plastic bags, a moisture-proof agent is placed to ensure the integrity and safety of the goods in transit. Company Profile ZheJiang Nieman Transmission Machinery Co.,LtdZheJiang Nieman Transmission Machinery Co., Ltd. is located in HangZhou City, ZheJiang Province, the earliest manufacturer specializing in the production of lifting systems , covering an area of 30000 square meters, with fixed assets of 60 million yuan.Our factory has a long production history, T40 ESC T40 Spraying Drone Accessories Agriculture Drone Spare Parts T20PT40 Spare Parts strong technical force, perfect testing methods, and perfect QAS, in 2005 was awarded as “ZheJiang Province Quality Trustworthy company”, and in 2007 through the ISO9000 quality management system certification. ZheJiang Nieman Transmission Machinery Co.,Ltd is a design and manufacturer of screw elevators, gear rack elevators, bevel gear steering boxes, servo electric cylinders, and precision worm gears. Nieman transmission products are widely used in Bullet train, Metallurgy, Automation equipment, Medical equipment, Petroleum, Thermal power generation, paper making, Water conservancy, Aviation and many other fields.. Certifications FAQ Q1:Are you a manufacturer or trading company? A1: ZheJiang Nieman Transmission Machinery Co.,Ltd is a design and manufacturer of screw lift, gear rack lift, bevel gear lift, servo electric cylinders, and precision worm gears.Q2. Can I get 1 sample to test?A2: Yes, sample can be at a normal price and welcomed. The transport fees are at your account.Q3: How about the of your product ?A3:Passed ISO9001-2015 quality CERTIFICATION. Q4: ODM/OEM accepted ? A4: Yes, we can do customer-made as your required. We will also provide whole system of linear transmission scheme .Q5: What about the payment methods?A5: We accept T/T, L/C for big amount, and for small amount, you can pay us by PayPal, Carbon steel non-standard size 15718mm deep groove ball bearings 6900 ZZ wheel bearing for wheelchair Western Union, and etc . Contact Items

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.


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.


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.


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.


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.


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.


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.

China China Manufacturer Nieman Swl Series Worm Screw Jack With High Quality     screw conveyor shaft alignmentChina China Manufacturer Nieman Swl Series Worm Screw Jack With High Quality     screw conveyor shaft alignment
editor by czh 2023-03-20

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