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Linear Shafts

What is a linear shaft?

The linear shaft is an automated transmission part that guides the sliding bearing and enables it to perform linear motion. The necessary conditions for the realization of these linear motion systems are: simple design; best execution capabilities; low maintenance costs; use of strictly selected strong and durable materials; accurate outer diameter dimensions; high-frequency heat treatment; true Roundness; straightness and surface treatment, etc.

The most commonly used optical shaft is the chrome-plated linear shafts.

solid shaft hollow shaft

How to Choose the Linear Shafts?


You can the linear shaft base on the types. It can be divided into three types: chrome-plated linear shaft, chrome-plated linear flexible shaft and chrome-plated hollow shaft.


(1) Chrome-plated linear shaft: Chrome-plated linear shaft is plated with a layer of hard chromium on the basis of ordinary linear optical axis, also known as bearing rod. It can be applied to rust-prone environments or bad environments. This shaft is widely used. For industrial robots, the moving part of the automatic sliding system device. The hardness is around 60.


(2) Chrome-plated linear flexible shaft: Chrome-plated linear flexible shaft can be directly used for precision piston rods and some self-lubricating bearings due to its thick chromium plating layer. Because of its moderate hardness, it is used in many fields. The hardness is around 30-40.


(3) Chrome-plated hollow shaft: Due to its hollow structural characteristics, the chrome-plated hollow shaft reduces the weight to a great extent and simplifies the structure. Its interior is suitable for penetrating measurement wires, compressing air, and adding lubricating oil. Or for a robotic arm.

Areswin Precision Machinery Company can produce high quality linear shaft. Theshaft can be processed according to customer drawings.

Our shaft is made of G6 precision high-quality carbon steel, and the linear shaft is mirror polished. We can use a grinder to cut the shaft to ensure the accuracy of the linear shaft. The surface of the linear shaft is chrome plated and electroplated.

We can process various optical shafts from 3mm to 150mm and length 6000mm.

Please check more linear shaft content on the website:

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Maintenance the ball screw: make ball screw have best performance

Maintenance the ball screw regularly

Ball screws are an essential component in many mechanical systems, and proper maintenance is critical to ensure their continued operation and longevity. Regular maintenance can help prevent premature wear and tear, reduce the risk of failure, and minimize downtime, which can save significant costs over time.

the stability of ball screw

Steps to maintenance the ball screw

The first step in ball screw maintenance is to keep the ball screw clean. Dirt, dust, and debris can cause significant damage to the ball screw, reducing its performance and lifespan. Regularly cleaning the ball screw with a soft, dry cloth or brush can help remove any buildup and prevent damage from occurring. If necessary, a mild detergent and water can also be used to clean the ball screw.

Next, it is important to lubricate the ball screw regularly. Lubrication helps reduce friction and wear, allowing the ball screw to operate smoothly and efficiently. Depending on the application and usage, different types of lubricants may be recommended, including oil, grease, or a combination of both. It is important to follow the manufacturer’s recommendations for the appropriate lubrication type and frequency.

Then,Regular inspections are also essential to maintaining a ball screw. During an inspection, look for any signs of wear, damage, or misalignment, such as cracks, chips, or unusual noise or vibration. If any issues are identified, address them promptly to prevent further damage.

Finally,Proper storage is also critical for ball screw maintenance. When not in use, store the ball screw in a dry, clean, and temperature-controlled environment to prevent corrosion and damage.

Choose a ball screw

In addition to regular maintenance, it is also essential to follow the manufacturer’s recommendations for the proper installation and usage of the ball screw. Improper installation or usage can make the ball screw have good performance. For the ball screw manufacturer choose,we suggest TBI band and GTEN brand (Made in Taiwan),which have  most popular ball screw type can meet most uses. Meanwhile. TBI and GTEN ball screw price is cheaper and quality is reliable.

Areswin Precision Machinery Company is supplier of  TBI and GTEN Ball screw if you need please contact us. We supply the ball screw to the wordwide and can machining the screw base on the clents drawing and can provide the technique support and after sell service.

The Ball Screw Must Maintain Stability When Moving At Low Speeds

As we all know, mechanical motion is different from human beings. In the case of high mechanical performance, high-speed and effective motion is relatively easy to achieve. However, if it is in low-speed motion, because of the reaction degree of the machine itself and the composition characteristics of the mechanical parts, it will cause crawling at low speeds, and in this case there will be a phenomenon of insufficient precision. The ball screw must maintain stability in low-speed motion conditions to be able to meet the needs of various production environments, so the following two aspects should also be paid attention to:

1. Low-speed movement maintains stability

In the process of low-speed movement, it is very easy to crawl. In this case, the stability of the low-speed movement and the degree of lubrication between the guide rails must be considered. In proper low-speed movement, maintaining a certain friction force can make it easier to control the speed and effectively improve the accuracy.

  2. The rigidity of the guide rail

Whether the guide rail will affect the accuracy under the external force, this must be considered. If the rigidity of the guide rail is not enough, it will directly affect the balance force, making it impossible to maintain linear motion efficiently. In order to make up for the rigidity of the guide rail, it is possible to appropriately consider increasing the size of the guide rail or other methods to increase the rigidity of the auxiliary guide rail.

The stability of the ball screw in the low-speed process is actually a way to ensure its accuracy. In the low-speed process, it is necessary to ensure that the rigidity of the guide rail can meet the requirements of that environment. In addition, during low-speed motion, proper consideration of the amount of lubricating oil used can effectively assist in increasing the accuracy and accuracy, so that the entire low-speed process will not affect the precision of the product.

the stability of ball screw

Do ball screws need lubrication?


Ball Screws should never be run without lubrication!

  • Ball screw assemblies require proper lubrication to ensure long life and smooth operation.
  • Running without lubrication may reduce the life by 90% or more!
  • Ball screws and nuts ship with a rust preventative. It is not sufficient lubrication.

Lubricants are often taken for granted, but the right choice for each application ensures a ball screw that performs properly for its calculated life. Both oil and grease provide corrosion protection, but lubricant choice depends on evaluation of the advantages and disadvantages of each in the given application.  The specific type of lubrication for a Ball Screw depends on various factors.

  • Light loads and high speeds do well with a machine oil or low viscosity grease.
  • Medium loads and speeds do well with NLGI 1 or 2 grease
  • High loads may require a grease with an EP2 additive. The EP is Extreme Pressure and uses special additives to prevent the grease from breaking down under high pressures. This type of grease will give the steel shafts a dull appearance.

Careful monitoring of the application is required to develop a good preventative maintenance schedule. The screws should be kept with a slight film of grease/oil at all times. It should feel slick to the touch but not dripping. You can lubricate the screw by applying grease to the OD of the screw and running the nut back and forth or via the lubrication fitting if the nut has one. DO NOT use any type of dry lubricant (PTFE powder, graphite powder, etc.) with any recirculating ball or roller type of bearing. While these lubricants are good for sliding motion, they do very little to aid rolling friction.

What details should be paid attention to in order to avoid the sliding table module from rusting?

The application of sliding table module has been very common in automation industry, but it may often lead to rusting due to improper use. If rusting, it will affect its positioning accuracy and even greatly affect the service life of linear sliding table module of manipulator. Generally, manufacturers will do anti-rust treatment before the sliding table module leaves the factory, but in order to avoid the sliding table module from rusting, some details should be paid attention to in use:

What should be paid attention to in coupling installation?

Coupling is an important component in enterprise mechanical transmission, which is widely used in the connection between equipment and reducer or motor. The assembly and alignment of the coupling is a very important task with high precision in equipment installation. If the assembly and alignment results are inaccurate, the vibration value of the equipment will exceed the standard, which will seriously threaten the normal operation of the equipment, especially the high-speed equipment. Therefore, special attention should be paid to some details in the process of installing the coupling.

1. In order to avoid wrong operation of the driver, please be sure to cut off the main power supply of the device and make sure it is safe before installing the coupling.

2. Please remove foreign matter, dust, dirty oil, etc. attached to the inner diameter surface of the mounting shaft and coupling. Especially, if there is dirty oil such as grease containing molybdenum disulfide and extreme pressure additives which will greatly affect the friction coefficient, please degrease it thoroughly.

3. When centering, please stick the ruler on the periphery of the body and check with two points that are about 90 apart. The service life of the assembly will be greatly affected according to the different centering accuracy.

4. After installing the coupling, please be sure to add a safety cover. Otherwise, contact with this product during operation may cause injury.

5. Clamping bolts must be tightened with calibrated torque wrench according to the locking torque value of the clamping bolts.

6. During installation, due to improper combination method, the vibration is too large, the operation is not normal, the center is not allowed, and the deflection angle exceeds the load, which will cause damage to the motor, coupling and other parts. Therefore, it is suggested that you should pay attention to the action of precision balance correction in mechanical assembly to improve the service life of the machinery.

What fields can the linear module be used in?

ARESWIN Relying on years of accumulation and precipitation in the industry, linear modules have achieved energy savings in the mold industry, auto parts industry, home appliance industry, kitchenware industry, hardware plumbing equipment, glasses, jewelry, clocks, and medical equipment to achieve energy savings, save labor costs, and improve production efficiency.

1. The medical and pharmaceutical industries can also find traces of linear modules in the marking of medical devices and pharmaceutical packaging. For example, plastic mechanical cover marking, drug delivery inspection, sorting, and packaging have linear modules.

2. The electronic semiconductor industry With the great development of the digital age of innovation in the era of technology, electronic products have entered all aspects of our daily lives. Batteries, IT fields, precision welding, motor welding, sensors, refrigeration accessories welding, light guide plate marking, cables, LCD panel edges, integrated circuit (IC) marking, welding parts laser, soldering is everywhere but linear module applications.

3. Light industry, textile, printing and dyeing industry

The dyeing, spraying, crystal handicraft processing and other industries developed in the high-tech modern daily life textile industry and home furnishing field, applied to motion control can satisfy the people’s pursuit of a comfortable and elegant life, and can feel the new experience brought by excellent quality . The linear module embodies its own advantages.

4. Transportation and logistics industry

Linear modules are used in handling, palletizing, sorting, etc. in the traditional transportation and logistics industry… It can greatly save costs and complete all operations safely and efficiently.

5. Printing industry

The specific processing technology is realized through personalized customization.

6. Machinery, manufacturing and processing industries.

If you need to build a linear module XY,XYZ table, please contact us in time, and we will provide you with a complete set of solutions.

What are the advantages of linear modules in industry?

The linear module was originally invented and used by the Germans. Its wide application worldwide has brought tremendous changes to the automation industry.

There are many types of linear modules. Compared with conventional transmission devices such as linear guides and ball screw linear actuators, they show greater advantages. The three advantages of linear modules are explained in detail below.

1. The speed of a single object can be increased by quickly reducing friction. Linear modules can increase the speed of linear motion by reducing the friction between interacting objects. At the same time, the positioning speed of the linear module is also very fast, and the time consumption is greatly reduced. The increase in positioning speed and linear motion speed means that the positioning speed and linear motion speed can be changed, and more work can be completed in a short time, that is, the work efficiency is significantly improved. The belt linear module is particularly prominent in terms of speed advantages.

2. High repetitive positioning accuracy and fast positioning speed does not mean that it affects the positioning accuracy of the linear module. While increasing the speed, it further improves the positioning accuracy of the linear module. Repeated positioning can be accurate at the same time, without the need for re-calibration and multiple operations. The parts can avoid errors. The linear slide has a variety of models and specifications to choose from, which is convenient to use, and there is no need to correct itself and the product in the short term. Ball screw linear slide It occupies a strong advantage in repeated accuracy levels, and it is very common in the contemporary laser manufacturing industry and laser cutting manufacturing industry.

3. Small size, long life, fast speed, and high precision are not all the advantages of linear modules, nor does it mean that linear modules are large in size. On the contrary, linear modules are smaller than existing transmission devices and are also used in precision equipment. Reason. For example, the service life of high-tech linear modules is basically more than 2000 (km).

At the same time, the latest reference price of machinery has been further reduced, and it has a long service life, which is suitable for automatic processing in large and small factories. The invention and use of linear modules provide the automation industry with faster speed and higher accuracy. At the same time, the longer life of linear modules further improves the cost-effectiveness of their use. In addition, the latest reference price of the linear module shows that the price of the linear module is more favorable, its advantages will be better highlighted, and its application range will be further expanded. Processing plants must develop and innovate before they can gain a firm foothold in the market competition of the manufacturing industry. The use of the best labor tool, the linear sliding table, is the first step for processing plants to keep up with the pace of the times.

What should we notice when mounting linear guide rail?

Linear guideway is designed for applications requiring precise movement with high bearing capacity. However, improper installation will increase unnecessary load, shorten service life and destroy the inherent stroke accuracy of linear guide rail system. Understanding and following the three installation specifications described below will help ensure that your installation achieves the required accuracy and will not fail prematurely.

1. Parallelism of guide rail

The most common installation method of linear guide rail is double track and four sliders. However, regardless of the number of sliders, when two tracks are used in parallel, if they are not installed within the parallelism tolerance specified by the manufacturer, additional side loads may occur. There are many methods for fixing guide rails and ensuring their straightness, from the most accurate method of machining reference edges for each guide rail, to the least accurate (and lowest cost) method of installing one guide rail using a straight edge or gauge, and using a connecting plate to “float” the second guide rail to an appropriate alignment position.

It is important to note that the allowable lateral force may be reduced if the guide rail is not installed on the reference edge or restraining strap. This is because the shear strength of guide rail mounting screws becomes the limiting factor of allowable lateral load without lateral holding force.

2. Vertical offset between guide rails

Guide rails used in parallel shall also meet the maximum allowable offset in the vertical direction. This is usually designated as S1, which is a function of the distance between guide rail and slider preload. The higher the car preload level, the smaller the allowable vertical offset. If this value is exceeded, rolling moment will be introduced into the frame, thus shortening the bearing life. When calculating the vertical offset, the height tolerance H of the slider must be considered. If the offset caused by height tolerance is larger than the allowable value, the guide rail with lower preload or higher precision should be used.

3. Vertical offset between sliders

When multiple sliders are used on the same track, the vertical offset between sliders (usually expressed as S2) becomes an important factor, and pitching moment can be exerted on the carriage. The allowable vertical offset is a function of the car length (standard, short or long) and the distance between the sliders. Similar to the offset between guide rails, the calculation of vertical offset between sliders should consider the height difference δ h between sliders. If the actual vertical offset is larger than the calculated allowable offset S2, a shorter version of the slider or a higher precision version must be used.

Of course, the correct installation involves other factors, many of which are not directly related to the components used, such as the base preparation, the geometry of the reference edge, and even the procedure of tightening the installation screws. Less demanding applications can usually achieve satisfactory results with less stringent installation procedures. But for the most critical and high-precision installation, strictly following the manufacturer’s installation and installation specifications will ensure the highest possible accuracy and avoid shortening the service life of the system.