China supplier 125mm Swivel Screw with Brake Castor Wheel for Hospital Bed with high quality

Merchandise Description


Healthcare Caster's common features:
1. This is our new layout for medical center useage. It is fragile. This wheel is with strengthened nylon hub and dustproof guard. One particular ball bearing in the wheel center. Overall brake caster with 1 lock placement.
two. Health care caster: Nylon housing with swivel ball rotating, there are many kinds of wheels for you to pick,
(a). 34E: Wheel tread is thermoplastic rubber, wheel center is plastic with ball bearing inside.
(b). 34C: Wheel tread is thermoplastic rubber, wheel middle is plastic with simple bearing inside.
(c). 39D: Wheel tread is electrostatic resistand thermoplastic rubber, wheel middle is plastic, no bearing.
(d). 39E: Wheel tread is electrostatic resistand thermoplastic rubber, wheel heart is plastic with ball bearing within.
(e). 34D: Wheel tread is thermoplastic rubber, wheel centre is plastic with plain bearing inside of.
3. Best-plate's matching fittings can be changed to stainless steel components to assemble all plastic casters.
four. There are plenty of sorts of casters for you to pick: Swivel plate caster Swivel plate with brake caster Swivel screw caster Swivel screw with brake caster Swivel bolt gap caster And swivel bolt gap with brake caster.

Double Rhombus do the greatest casters in China:
1. Scientific structure design and style
2. Specific rotation design and style
3. Large top quality material to guarantee the caster capability.
four. Large quality supplies bought with rigorous high quality examining.
5. Making strictly in accordance to the ISO quality management system.
six. Every single item will be checked strictly before packing.
7. The most essential point is: We are expert company.

Take a look at assortment:
one. Shock absorption function
2. Load capability
3. CZPT capacity
four. Influence resisting performance
5. Managing potential
6. Service life evaluation

Delivery and payment:
1. The payment will be by T/T. forty% progress payment. The balance paid out just before cargo
two. The merchandise will be transported within 4 months after getting down payment from consumer.

Company data
1) Our company was founded in 1978, it has gotten certificates of ISO9001 high quality system, OHSAS 18001 CZPT system and ISO 14001circumstance program presently. The National Standard Bureau entrusted our organization to compile the Nationwide common GB/T14687-ninety three and GB/T14688-93 for industrial caster in 1993 and 2011.

two) Our company has more than 10 several years export expertise, skilled production engineering, and a strict quality handle method. Most of our engineers and mechanics have more than 10 several years encounters on manufacturing caster. Our manufacturing unit has CZPT producing procedures, equipment and experienced production traces for CZPT producing, curved cutting, punching, welding, area plating, machine assembling and ability exams for casters, airport trolley, airport counter, airport chair, queue stand, foldable hand truck.

3)  We have our possess development and design groups. If there is any merchandise you are intrigued in, please send us an inquiry, if you couldn't find what you want , please also enable us know, we could make it personalized for you.

Sample services

Sample         Available                            
Sample fee  Compensated by customer, but can be refund when mass generation
Shipping charge Send out by specific or by air, compensated by consumer, but can be refund following mass production


Fast reaction: Our consumers will get our reply with 24 several hours, and get our quote within 24 hrs during functioning days. You will get our best service

FAQ: Data we require to know

Design No. of  merchandise

***We are seeking ahead to your inquiry. If there are no caster that you are searching for, pleae also make contact with us immediately, we can make new goods for you.

Ball Screws - Proportions, Apps, and Rewards

Ball screws are well-liked, lightweight, precision mechanical factors. They are typically employed in equipment, gears, and knurled objects. These screw-like parts can be simply managed and lubricated using oil. This report discusses their dimensions, programs, and positive aspects. The following sections offer additional info to assist you decide on the appropriate ball screw for your demands. We are going to go over some of the critical attributes of ball screws and what helps make them so helpful.


A key dilemma with nut-to-ball screw backlash is the capability of the nut to shift freely on the threads of the ball screw. To remedy this difficulty, a patented answer was designed. The patent, 4,557,156, describes an innovative strategy for preloading ball screws and nuts. By making use of a preloading nut, the threads of the ball screw are prevented from transferring back and forth with the nut.
A mechanical layout that entails axial enjoy requires a good deal of mass, inertia, and complexity. These characteristics lead to wear and rust difficulties. Preloading ball screws employing a dynamic technique minimizes mechanical complexity by allowing preload to be modified while the mechanism is running. This also decreases the amount of mechanical areas and simplifies producing. As a result, the preloading strategy of the present invention is useful.
The servo motors utilized in the method keep an eye on the output torque and modify the electrical power to a single motor in a dynamic way, as a result making a torque differential between the balls. This torque differential in change creates a preload force in between the ball nuts. The servo motors' output torque is managed in this manner, and the machine's backlash clearance can be precisely controlled. Hence, the machine can execute multiple responsibilities with enhanced precision.
Several prior artwork approaches for preloading ball screws are described in detail in FIG. 3. The helical thread grooves of the ball screw 26 and the nut 24 determine a pathway for roller balls to travel alongside. The stylized broken line implies the general position of the axis of the ball roller screw 26. The corresponding ball screws are employed in a quantity of applications. This strategy may possibly be employed to manufacture custom made-sized screws.


Ball screws are mechanical factors that roll balls through a groove. Poor lubrication can decrease the existence of these screw elements. Incorrect lubrication can lead to shaft injury, malfunction, and diminished overall performance. This write-up discusses the relevance of correct lubrication and how to do it. You can find out how to correctly lubricate ball screws in the adhering to paragraphs. Right here are some ideas to guarantee prolonged-phrase efficiency and protection of ball screws.
The 1st issue you should do is decide the variety of lubricant you are going to be employing. Oils are chosen simply because they tend to continue to be inside the ball nut, and grease can construct up in it. Oils also tend to have better anti-corrosion homes than grease. Nonetheless, grease is a lot more very likely to be clogged with debris than oils. So, before you decide on the lubricant that is proper for your screw, make sure you clean it off.
The oil employed in ball screw lubrication have to be used at a managed price. It can avoid metal-on-metallic get in touch with and thoroughly clean out contaminants as it passes via the ball nut. Nevertheless, oil as a lubricant is costly and can contaminate the procedure if it mixes with the cutting fluid. Grease, on the other hand, is economical, demands less applications, and does not contaminate approach fluids.
If you use a synthetic oil for lubrication, make sure to decide on a viscosity that is proper for the functioning temperature. Oil viscosity can improve the temperature of the ball screw assembly, and excessive oil can decrease its life. A correct sum of oil will reduce the temperature of the ball screw assembly, although as well little will enhance friction and put on. Use the pursuing guidelines to establish the right sum of oil for your screw.


Dimensions of ball screws are a very essential factor to consider when figuring out the very best variety for your application. Complex acceptance circumstances for ball screws specify the permitted deviations during acceptance checks. The tolerance class can also adjust, dependent on the wants of a specific software. The pursuing table lists the most crucial tolerance values for the total variety of screw lengths. This desk is a useful guidebook when hunting for a distinct screw. The desk under lists the proportions of frequent ball screws.
The axial load utilized to a ball screw is .5 x Fpr / 2Fpr. The minimal screw diameter is acknowledged as the root diameter. The axial load brings about the screw shaft to deform in a specified way (DL1 and DL2). The elastic deflection induced by the load on a ball screw is known as its rigidity. This rigidity is important for calculating sizing parameters for a ball screw.
The preload price of the ball screw affects the dynamic load capability. A preload of ten per cent is regarded as adequate, although a worth better than this may compromise the screw's sturdiness. In common, a large preload worth will outcome in a reduced dynamic load capability and greater dress in. However, the preload worth should be calculated with the relevant screw parameters. This is simply because a substantial preload benefit lowers the screw's durability.
To make certain that your screw fulfills the specified parameters, the dynamic load capability should be calculated. This is the volume of force a ball screw will stand up to below a specified load. This calculation also consists of energy checks. If you are utilizing a ball screw for apps that require further energy, it may need a security factor. For example, if the screw is utilized for double-axial mounting, then the outer ball nut should be inserted into the nut, creating a secondary load.


The current invention gives a simple, yet very successful way to mount a ball screw. Its absence of insert slots or via holes helps make it less complicated to assemble and gives a a lot more uniform nut. The lack of mechanical functions also reduces warmth therapy concerns, and the nut's hardness can be uniformly hardened. As a consequence, the screw's general overall performance is improved. Below are some illustrations of applications for ball screws.
Preloading is the approach of applying force to a ball screw. This raises the rigidity of the screw assembly and eradicates backlash, which is misplaced motion brought on by clearance amongst the nut and ball. Backlash disrupts repeatability and accuracy. Spacer preloading entails inserting drive among two ball nuts and transmitting it by way of the grooves. This approach is ideal when preloading is necessary in huge quantities. In addition to growing rigidity, preloading can boost accuracy.
Ball screws demand mindful treatment in their doing work surfaces to avert contamination. Rubber or leather bellows can be utilised to defend their surfaces, even though good air pressure can be utilized to the screw. Preloading eradicates backlash, a frequent dilemma amongst screw assemblies. In addition to the many purposes for ball screws, they are also vital to pc-controlled movement-control systems and wire bonding. And there are several far more illustrations. So what are the rewards of using these gadgets?
The spring preloading technique makes use of a spring in between two ball nuts, making use of tensional forces to the ball nuts. This spring creates grooves in the nut's center, which facilitates recirculation of the balls. The spring preloading system is far more compact than the double nut mechanism, but the lengthening of the guide lowers the ball screw's load potential. Its compact design tends to make it excellent for modest clearance assemblies.


In addition to performing maintenance jobs oneself, the producer of ball screws should supply reverse engineering solutions that will empower them to identify particular issues. The method of reverse engineering enables ball screw manufacturers to build new ball screws and elements. In the occasion that a ball screw is outside of repair, a company can frequently conserve a important volume of funds by fixing it alternatively of changing it. In addition to fixing a ball screw, the maker need to also supply totally free evaluation solutions for the component. Reconditioning and replacement entail the use of new elements, although reloading and substitution exchange the screw.
Doing routine upkeep checks on ball screw assemblies is important for keeping optimum overall performance and extending their service life. Time beyond regulation, too much put on can direct to a variety of problems, which includes backlash, vibration, and ball bearing sound. In addition, the enhanced friction increases the required torque for turning a screw, creating program failure and considerable downtime. To guarantee that a ball screw is completely practical, it should be checked for wear and keep the appropriate lubrication system.
Discoloration or pitting on a ball screw indicates that it is in require of fix. The very same is real if there are chatter marks in the ball groove. Oftentimes, a ball screw requirements a new lubrication seal or wipers. Additionally, it might be missing or in excess of-wearing, which could consequence in permanent failure. Finally, extreme electricity attract could be a indication of inappropriate lubrication or improper set up.
Suitable maintenance is crucial for any machine device. When executed effectively, device instruments can very last many years with constant use. Appropriate treatment and servicing is crucial to make certain lengthy lifestyle and optimum overall performance. In addition to enhancing machine resource uptime, correct maintenance impacts the precision and repeatability of the conclude merchandise. As a result, quality equipment instrument makers emphasis on the performance and durability of ball screws. They produce modern designs and lubricants to enhance the lifespan of their products.

China supplier 125mm Swivel Screw with Brake Castor Wheel for Hospital Bed     with high qualityChina supplier 125mm Swivel Screw with Brake Castor Wheel for Hospital Bed     with high quality

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