China Hot selling High Quality Stable and Durable High Precision Ball Screw Metal Waist Nuts Sfu 2505-4 with high quality

Item Description


Solution Description


The ball screw assembly is made up of a ball screw nut and a bar. The perform is to transform CZPT motion to straight motion or straight movement to CZPT motion. Ball screws are extensively used in numerous industrial products and precision devices.
Ball screw components can also be acquired in our shop, or directly check with on-line buyer services to aid you get

Product characteristics

one. Higher transmission effectiveness
2. Sleek movemen
three. Large precision, length and trustworthiness
four. No clearance and pretightening
5. Use computerized turning NC device tools for production
6. Precision ball screw
7. Reduced friction
8. Tough layout
9. Substantial-speed operation

Product Parameters



Set up Recommendations

Range of application


1. Automated handle of machine
2. Semiconductor industry
3. Common industrial equipment
4. Health care tools
five. Photo voltaic gear
six. The equipment resource
seven. Parking system
eight. Substantial-speed rail and air transportation equipment, and so forth

Organization Profile

ZHangZhoug HangZhou KaiYaDe bearing co., LTD. Is a have a lot of a long time experience of linear motion products expert producers. We specialized in the generation of straight axis, linear guide, ball screw, linear bearings, linear guidebook, ball screw finish assistance, linear manual, CAM follower and of good top quality and aggressive cost. My company is found in HangZhou city, zHangZhoug province, shut to HangZhou port and HangZhou metropolis.

Our Positive aspects





1. Are you a manufacturing facility or buying and selling business?

We are the most aggressive value and large top quality expert companies, has 12 many years of expertise.
two. What is your solution selection?
Specializing in the production of straight axis, linear bearings, linear manual, linear information, ball screw, linear motion unit such as CAM follower.
3. Do you supply OEM&ODM provider?
B: of course. Welcome OEM, ODM
four. How can I get some samples?
We are really honored to provide samples. You need to shell out the freight and some sample payment.
5. How is the good quality manage of your factory?
We uphold the tenet of "quality is the future", we have handed CE certification, we have stringent quality handle methods.
six. How can I get quotation?
You can send below quotation or ship electronic mail to us. You can make contact with us immediately by TM or WhatsApp and Skype as you like. If you have an unexpected emergency, make sure you contact us at any time.


Specifying a Ball Screw

When you need a substantial-quality ball screw, it is important to choose one particular with the correct proportions and specifications. When you are seeking for the ideal solution, you should contemplate features these kinds of as preloading, surface finish, and inner return method. You can find out much more about these characteristics in this article. If you are uncertain which type of ball screw to pick, speak to a reliable supplier for more advice. To uncover the best item for your requirements, simply click listed here!


When specifying a Brinelling ball screw, it is vital to know how significantly axial load it can securely bear. The static load capacity, which is offered in the catalogue, applies only to pure axial loading, and any radial load that is smaller sized than 5% of the axial load will not pose a problem. For far more information, make contact with a CZPT engineer. Brinelling ball screw support lifestyle calculation ought to be carried out employing the adhering to information:
Preload: The amount of load a ball screw can deal with for the duration of a one revolution. Preload is the load used just before the ball screw starts moving, and the load is usually among 5 and ten p.c of the dynamic ability. Nevertheless, a ball screw that is topic to vibration will experience larger preload, demanding much more recurrent lubrication. The resulting mechanical tension may possibly trigger the ball screw to buckle, or lead to the nut to re-flow into the balls.
Critical ball speed: The highest speed at which the ball can shift via the ball nut is named the critical ball speed. In distinction, managing the ball screw at its critical shaft speed can guide to too much vibrations, top to untimely failure of the stop assistance bearings and brinelling of the ball keep track of. Thus, it is recommended to operate a ball screw at a reduced velocity than the crucial ball speed to avert brinelling and plastic deformation of the balls.
Bogus brinelling: Bogus brinelling is a kind of Fretting. Bogus brinelling happens when the bearings are not rotating. The motion will end result in depressions or dress in marks in the bearing raceway. This will trigger sound, use, and eventual tiredness. If these problems persist, a more recent ball screw ought to be utilised to test the system. The machine ought to be operate for several several hours and examined ahead of replacing the bearing.


The procedure of preloading ball screws minimizes backlash by implementing force to the threads in the opposite route of the screw's direction of rotation. It stops any movement of the screw relative to the nut. Different approaches are employed for preloading. A common one is to use oversized balls inside of the ball nut. A double nut method may possibly also be employed. The two approaches are equally successful. Regardless of the strategy utilized, the finish outcome is the identical - minimum backlash and improved performance.
In the conventional technique of preloading ball screws, the motors operate concurrently in reverse directions, creating them to have a relative motion of roughly equivalent magnitudes. This lowers the frictional resistance of the method, ensuing in rapid traverse. The system is ready to work with small backlash during 110 inches of journey, decreasing the warmth created by the generate nuts and the problems linked with ball screw heating. Furthermore, this technique can be employed in a vast selection of purposes.
An additional technique of preloading ball screws is recognized as the ball-pick approach. This strategy consists of the use of above-sized balls that force the balls into more contacts with the screw and nut than a standard ball screw. The edge of this method is that it decreases backlash simply because the balls are not machined to large tolerances. The drawback of this approach is that the ball screw will price more to manufacture than a normal ball screw and nut.
A typical style contains a mechanical system that makes use of a sequence of balls to rotate a shaft. The dilemma of backlash is exacerbated by the mass of the shaft. The mechanical system is much more intricate than essential and often needs a good deal of effort. The present creation eliminates these troubles by providing an improved strategy and equipment for driving ball screws. This approach offers a a lot more effective preload pressure that is dynamically adjustable while the system is working. The approach can also boost friction and wear.

Interior return system

There are two diverse varieties of ball screws. The very first kind is external and the next is inner. The external sort makes use of return tubes that protrude from the ball nut and prolong previously mentioned and about the exterior of the screw. The inner type utilizes a one tube that spans the ball track, even though the much more widespread design and style makes use of multiple tubes spanning 1.5 to 3.5 ball tracks. The inside technique involves a solitary return tube and numerous pickup fingers that guide the balls into the tubes.
The exterior return tube design and style is an easier, less pricey option. The external ball return system has limited area but can take care of a broad range of shaft diameters and prospects. Even so, its bodily size makes it incompatible with many substantial-pace applications. Therefore, watchful thought should be presented to the mounting choices. Inside ball return programs are very best suited for little qualified prospects and ball measurements. These that require a large speed will most likely benefit from the external ball return system.
Internal ball screw technological innovation has also retained speed with the needs of linear travel techniques. Ball screw engineering is now more resilient than at any time. Robust inner ball return systems flow into ball bearings by way of a strong pickup pin. These deflectors help the balls return to the screw in the appropriate spot. They are critical parts in computer-controlled motion handle techniques and wire bonding. If you are intrigued in the newest improvements in linear screw technologies, make contact with us today.
Ball screws are outstanding to guide screws in numerous techniques. Ball screws are more successful than direct screws, converting 90% of rotational movement into linear movement. As a consequence, they are a lot more costly than guide screws and acme screws. They also supply a smoother motion above the total journey range. Furthermore, they need less electricity for the same performance. It really is no surprise that the ball screw is so common in many distinct purposes.

Surface area finish

The surface finish of a ball screw is one of the essential factors in determining the efficiency of the program. A ball screw with a good surface complete has excellent functionality in rolling resistance, backlash, and use traits. However, it is vital to improve the area finish of a ball screw to accomplish precision movement, minimal put on, and minimal sound. To achieve this, unique wire brushes will be employed to polish precision-ground shafts.
For a ball screw to perform nicely, it should be challenging, have a smooth surface, and keep lubricant. The surface finish of a ball screw should be easy, cost-free of cracks, and retain the lubricant properly. Cracks and annealing are both unwanted during the manufacturing procedure, so a high quality equipment should be utilized for its surface area finish. In the course of the generation process, a CBN chopping insert with complete round or gothic arch profile can be utilized to accomplish a large-high quality floor finish.
Yet another finishing procedure employed in the manufacture of ball screws is lapping. Lapping increases surface area quality and travel variation. It includes complicated relative movements of abrasive particulates with the workpiece. This removes a slender layer of substance from the workpiece, improving its floor good quality and dimensional precision. The lapping method can be carried out beneath lower-strain conditions. It also improves the friction torque and lubrication.
In lapping experiments, friction torque has the premier impact on vacation variation and area roughness. A friction torque of about one N x m is optimum. In addition, rotational speed has only a minimal impact. The best blend of these parameters is 1-1.5 N x m and thirty rpm. The bare minimum surface area end of a ball screw is about 800 mesh. The smallest variation in vacation is noticed at around 50 percent-way via the travel.


Appropriate lubrication of ball screw assemblies is crucial to keep optimum efficiency and lifestyle. Ball screw assemblies must be lubricated with grease, which is launched straight into the ball nut. The lubrication port can be located at various areas on the solution, including on the flange or in the external threads of the ball nut. Some ball nuts also function a zerk fitting for less complicated lubrication.
The lubrication of ball screws is essential in the case of operating problems over 100oC. The minimal load for a ball screw is usually realized with a preload force. The lubricant is conveyed by means of the slim lubrication hole because of to the relative movement of the two surfaces. The increased viscosity of the lubricant enables separation of the speak to surfaces. To stay away from over-lubrication, it is essential to examine the lubricant amount often.
The oil employed in lubrication of ball screw assemblies can be both mineral or artificial. The oil is composed of mineral or synthetic oil, additives, and a thickening agent, this sort of as lithium or bentonite. Other thickening agents incorporate lithium, barium complexes, or aluminum. The lubricant quality NLGI is a extensively utilised classification for lubricating greases. It is not enough to decide on a certain kind of lubricant for a specific application, but it gives a qualitative evaluate.
Despite currently being important to the efficiency of a ball screw, lubrication is also crucial to its lifespan. Distinct types of lubricant offer you corrosion defense. Just before using a lubricant, make confident to extensively cleanse and dry the ball screw. If there is any buildup of dust, it may harm the screw. To stop this from taking place, you can use a solvent or lint-cost-free cloth. Lubrication of ball screw assemblies can greatly extend the existence of the assembly.

China Hot selling High Quality Stable and Durable High Precision Ball Screw Metal Waist Nuts Sfu 2505-4     with higher good qualityChina Hot selling High Quality Stable and Durable High Precision Ball Screw Metal Waist Nuts Sfu 2505-4     with high top quality

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