Ball Bearing Manufacturer

Ball Bearing Manufacturer

Ball bearing is a kind of bearing, which places spherical steel balls between the inner steel ring and the outer steel ring, and transmits them by rolling, so as to reduce the friction in the process of movement and improve the mechanical power. The ball bearing cannot bear too much weight. It is often seen in light industry.

slewing bearing

The design of a ball bearing consists of four basic units:
Ball: The ball is made of high-chromium steel, with certain rolling properties and strength, and the hardness is between 61-65;Inner ring and outer ring: together form the main components of the ball bearing, the inner ring is inside and the outer ring is outside. During the movement, the inner ring and the outer ring form a concentric shaft rolling;
Cage: The cage is to fix the gap between the inner ring and the outer ring of the balls, to ensure that the balls do not contact each other during the rolling process, and to fully exert the sliding of the balls  effect.

Assembly
Advantages of ball bearings
LDB Ball bearings have significant energy savings, depending on the sophisticated motion characteristics of
the ball bearings. The friction force of the ball bearing is much smaller than that of the sliding bearing, which reduces the consumption of frictional resistance; the size of the ball bearing is standardized, the maintenance is convenient, and the installation and disassembly are convenient; the LDB ball bearing has a compact structure, light weight, and is used for small industrial equipment; the precision of LDB the ball bearing can be Adjusted according to demand, large load, small wear and long
service life.

Cross Roller Bearing Manufacturer

Cross Roller Bearing Manufacturer

Cross roller bearing  is a special type of bearing with inner ring split and outer ring rotating. Because the separated inner or outer ring is fixed together with the cross roller shaft ring to prevent separation from each other after being loaded into the roller and spacer, it is easy to operate when installing the cross roller shaft ring. Because the rollers are cross arranged, only one set of cross roller shaft rings can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with traditional models. At the same time, because the inner ring or outer ring of the cross roller bearing is two separate structures, the bearing clearance can be adjusted, even if the preload is applied, it can also obtain high-precision rotating motion.

The rollers of cross roller bearings are arranged at right angles to each other between the inner and outer wheels. They can withstand loads from all directions (such as axial, thrust or momentum loads) at the same time. Because the roller is in linear contact with the track surface, the possibility of bearing elastic deformation under load is very small. This type of bearing is widely used in industrial automatic robots, work machinery and medical facilities, etc., where high rigidity, tight and high speed can still ensure accuracy.

In cross roller bearings, because the cylindrical rollers are arranged vertically to each other through the spacer, a cross roller bearing can withstand radial load, axial load and torque load in all directions. The size of the inside and outside the circle is a minimum of miniaturization, especially extremely thin type is close to the limit of small size, and high rigidity, so the most suitable for industrial robot joint department or rotate department, machining center of rotary worktable, manipulator rotate, precision rotary worktable, medical machine, meter, IC manufacturing devices use.

What is the “cross” of roller bearing

The cross roller bearing is easy to operate when installing the cross roller shaft ring because the inner or outer ring which is divided is fixed together with the cross roller shaft ring to prevent separation from each other after being loaded into the roller and spacer. Because the roller is cross arranged, so only 1 set of cross roller shaft ring can bear the load in all directions, compared with the traditional model, the rigidity is improved 3~4 times. At the same time, because the inner ring or outer ring of the cross roller bearing is two separate structures, the bearing clearance can be adjusted, even if the preload is applied, it can also obtain high-precision rotating motion.

Features and advantages of cross roller bearings:

1, With excellent rotation accuracy

The internal structure of cross roller bearing adopts 90° vertical cross arrangement of rollers.
The rollers are equipped with a spacer or isolation block to prevent the rollers from rubbing each other. In addition, there will be no roller contact phenomenon or lock phenomenon; At the same time, because the inner and outer rings are divided structure, the clearance can be adjusted, even if the preload is applied, also can obtain high precision rotary motion.

2. Simplify operation and installation

The outer or inner ring, which is divided into two parts, is fixed together after the roller and retainer are loaded, so the operation of installation is very simple.

3, Bear large axial and radial load

The rollers are arranged perpendicular to each other by spacer on a 90° V-groove rolling surface.

4, Greatly save installation space

The size of the inner and outer ring of the cross roller bearing is minimized, especially the ultra-thin structure is close to the limit of small size, and has high rigidity. So the most suitable for industrial robot joints or rotating parts, machining center of the rotary table, manipulator rotating part, precision rotary table, medical instruments, measuring instruments, IC manufacturing devices and a wide range of uses.

5. High speed capacity

6. Reduce shaft length and machining cost, thermal expansion leads to limited changes in geometric dimensions

7. Nylon separator, low moment of inertia, low starting torque, easy to control Angle division

8. Optimized preload, large stiffness, high precision of guide roller operation

9. Carburized carbon steel provides excellent impact resistance and surface wear resistance

10. Simple but well lubricated

Features and advantages of cross roller bearing

1. Cross roller shaft has the characteristics of high rigidity, accuracy and easy installation. Mounting holes allow them to be quickly fixed to components. Cylindrical roller of this type .Also equipped with isolation block.

2. Cross roller bearings have strong, non-detachable inner and outer ring structures, which can easily achieve high stiffness and high accuracy without being affected by surrounding structures. Bearing optimum for medium to high speeds, bearings are fitted with isolation blocks between cylindrical rollers to provide smooth rotation.

3. The outer diameter of cross roller bearings is small and the width is narrow. If you need high performance and take up less space, you can also choose to use cross roller bearings.

Because the cross roller bearing is divided into two parts of the outer ring or inner ring, after loading the roller and reholder, is fixed together, so the installation operation is very simple, and the high precision characteristics of the cross roller bearing, the accuracy can reach P4/P2 level, smaller volume, so that the host more space saving.

THREE-ROW ROLLER SLEWING BEARINGS

CROSS ROLLER BEARING

Slewing Ring Turntable

Generally speaking, slewing ring turntable are large-sized rolling bearings that can withstand axial, radial and moment loads in any direction, alone or in combination. Turntable bearing can perform both slewing (oscillating) motions as well as rotational motions.

Basically, the slewing ring turntable consists of an inner ring, an outer ring and rolling elements (balls or cylindrical rollers), which are separated by polyamide gaskets. One of the bearing rings, which usually contains gears, is provided with holes to accommodate the connecting bolts.

These holes threaded. Typically, only the raceway in the ring is hardened and precision ground. Integral seals made of acrylonitrile butadiene rubber (NBR) retain lubricant inside the bearing and contaminants outside the bearing. The slewing bearings turntable is relubricat by grease fittings to reduce maintenance and operating costs.

Slewing bearing turntable arrangements offer many design and performance advantages over traditional pivot arrangements. We have simplified the compactness and large inner diameter of the relevant parts of the slewing ring, which is more in line with the modern industrial design.

The bearing ring section height of these bearings means that the pinion rod can be kept short. In most cases, only the planes on the relevant parts are required.

Slewing rings turntable were originally designed to be mounted only on horizontal support structures, but can now be used successfully for vertical bearing arrangements.

Slewing bearings excel in a variety of applications, such as:

  • Spider Lift Access Platforms / Rail Access Platforms
  • Bucket Wheel Excavator Bearings
  • Transfer arm bearing
  • Cranes of all types
  • Small excavators, medium excavators and large excavators Slew Bearing
  • Indexing tables
  • Ladle Turrets Slew Bearing
  • Offshore applications
  • Robots Bearing
  • Railway Bogies
  • Rotary Platforms Slewing Bearing Turntable
  • Stackers Slewing Bearing
  • Solar Mirrors Slew Drive
  • Tunnel Boring Machines
  • wind turbines / Pitch bearing

New Wind Turbine Bearings

The operational challenges for wind turbines cannot be overestimated

Increased turbine power and size,extreme weather conditions, heavy loadsn and remote locations are just a few.

LDB has developed an innovative slewing bearing design with enhanced sealing capabilities and redesigned internal geometry to meet these challenges.

The LDB High Endurance Slewing Bearing offers increased resistance to harsh environmental conditions to improve reliability and performance and extend bearing service life.

Design, material and knowledge engineering combine for high endurance New internal bearing geometry in the cage and raceways reduces friction and increases turbine and pitch control performance. Reduced friction contributes to pitch system effectiveness and efficiency to maximize energy production.

A new seal material, manufactured from polyurethane, provides better resistance to ozone, UV and salt water, reducing wear and providing longer service life than traditional nitrile-based sealing solutions.

The seal design is engineered to be less sensitive to ring deformation during operation for improved sealing efficiency,reducing grease leakage and water ingress, which results in improved robustness and lower maintenance costs.

The innovative way the bearing and seal are attached provides simplified installation and replacement, while at the same time the seal efficiency is maintained despite ring deformations under maximum operating loads.

Benefits

  • Increased turbine reliability even in harsh environments
  • Extended seal and bearing service life
  • Reduced operation and maintenance costs
  • Improved pitch control for increased performance
  • Reduced installation and replacement time

 

Typical applications

Pitch bearings to optimise the blade position for different wind conditions

Yaw bearings to correctly position the nacelle during operation

LDB offers a complete approach

As the world leader and innovator in bearing technology for more than 100 years, LDB has a unique understanding of rotating equipment and how machine components and industrial processes are interrelated, in every major industry worldwide. This knowledge – coupled with our expertise in sealing solutions,lubrication systems, linear motion,machinery maintenance, mechatronics,and services – enables us to deliver real-world solutions that help maximize mechanical performance over the entire lifecycle of an asset. As a result, LDB is your single source for off-the-shelf and customized technology products,solutions and services.

  • LDB High Endurance Slewing Bearing
    Improved performance and reliability to meet wind industry demands
  • New seal design
    Improved seal function under high loads, reducing lubricant leakage and water Ingress
  • EcoPur seal material
    Increased resistance to wear, UV, ozone and salt water, improving seal reliability and service life even in harsh environments
  • Optimized cage design
    Adjustments to the cage design and a special coating reduce the internal friction of the bearing
  • Optimized raceway design
    Reduced internal friction and increased service life

Wind Turbine Bearings Market | LDB

Metals Ladle turrets Application

By integrating LDB’s high temperature seals, cages and components, LDB slewing bearings for ladle turrets increase reliability and bearing service life while reducing maintenance costs.

In addition, LDB’s advanced condition monitoring technologies provide valuable information on bearing wear rate. This helps reduce the impact that slewing bearing change-outs can have on production as it allows for time to safely plan and optimally schedule change-outs.

“LDB slewing bearings have better service life than competitor bearings.”– Metals customer

Bucket wheel stacker reclaimer bearing

Bucket wheel stacker reclaimer bearing

Stacker reclaimers slewing bearings for stacker reclaimers increase reliability and bearing service life while reducing maintenance costs by integrating advanced condition monitoring technologies. Automatic drop height and displacement measurement trends give a clear picture of bearing wear rate,allowing time to safely plan slewing bearing change-outs with minimal impact on production.

“Sealing solutions are better and they help provide increased slewing bearing service life.” – Mining customer

Wind Turbine Bearings

Wind energy Turbines

Drawing on a wealth of wind turbine engineering knowledge, LDB has developed an innovative slewing bearing design with enhanced sealing capabilities and redesigned internal geometry to meet the challenges of the wind industry.

The LDB High Endurance Slewing Bearing offers increased resistance to harsh environmental conditions to improve reliability and performance and extend bearing service life.“With its advanced technical knowledge, LDB was a reliable development partner for my windmill slewing bearing solutions.”– Wind energy customer.

Wind turbines generate electricity under adverse and constantly changing conditions, both on and offshore. Efficient power generation from wind turbines demands high performance from every component – particularly the bearings used in the turbine drivetrain and gearbox.slewing bearing


LDB rolling bearings for these applications perform with robust resistance to seizure, wear, flaking and unique challenges such as white etching cracks (WEC) to deliver advanced product design solutions for a reliable and sustainable operating life.

Slewing Bearing Monitoring Services And Savings

Slewing bearing monitoring, services and savings

Reduce downtime with condition monitoring

LDB offers unmatched expertise and technology for monitoring your slewing bearing solutions and supporting your predictive maintenance needs. With a range of solutions as well as wireless solutions, we can help you monitor everything from contamination levels of grease and oil to vibration levels in critical locations around slewing bearings. We provide wear measurement, raceway crack detection using integrated ultrasonic probes and on-line bolt tension monitoring. Where a wired condition monitoring solution was not feasible in the past due to cost associated with initial infrastructure set-up, a variety of wireless solutions is also available nowadays.

Remanufacturing saves cost and time

LDB’s remanufacturing services can generate significant cost savings and save time when compared to purchasing a new bearing.

Our global sales and application engineering network is there to comply with your requests and assist when you face emergencies or require a bearing to be inspected and/or remanufactured.

Expert technical assistance To help you increase the service life of your slewing bearings, our specialist teams can plan and perform: mounting and dismounting, inspection in our workshops or on site, remanufacturing, checking slewing bearing seating flatness using a laser system and tensioning of bolts by using bolt tensioners, all to improve the quality, performance and reliability of your equipment and more.

The Power of Slewing Bearing Knowledge Engineering

Combining products, people, and applicationspecific knowledge, LDB delivers innovative solutions to equipment manufacturers and production facilities in every major industry worldwide.

Having expertise in multiple competence areas supports LDB Life Cycle Management, a proven approach to improv ing equipment reliability,optimizing operational and energy efficiency and reducing total cost of ownership.

These competence areas include bearings and units, seals, lubrication systems, mecha ronics,and a wide range of services, from 3-D computer modelling to cloud-based condition onitoringand asset management services.

LDB’s global footprint provides LDB customers with uniform quality standards and worldwide product availability. Our local presence provides direct access to the experience, knowledge and ingenuity of LDB people.

LDB improving reliability with Life Cycle Management

Improving reliability with Life Cycle Management
Install and commission Operate and monitor Maintain and repair Specification De sign and develop Manufacture
From specification and design to maintenance and repair, at LDB we use our Life Cycle Management approach to optimize both slewing bearing performance and service life while reducing total cost of ownership.
Specification Design and develop Manufacture and test Install and commission Operate and monitor Maintain and repair.

Specification
With in-house specialists across a wide range of critical areas such as seals, lubrication,
wear protection and more, LDB enables you to work with application engineers and designers to find the right solution, right from the start. We can support your project by combining all of this application knowledge to improve designs and enhance performance of your slewing bearing solutions.

Design and develop
With over 20 years of slewing bearing experience and unmatched engineering expertise, we can help you design and develop high-performance slewing bearings from 0,1 m to 18 m (> 8 m to 18 m are segmented). Our Engineering Consultancy Services (ECS) can provide advanced calculations and simulations utilizing high-tech computer programmes to optimize and verify designs. All of these advantages combine to improve operational performance of application machinery and reduce total cost of ownership.

Manufacture and test
we offer fast, local access to LDB technologies,services and support. Our extensive logistics network provides excellent availability of LDB’s slewing bearing solutions.
To be able to offer slewing bearing manufacturing and testing excellence, LDB has developed close relationships with certifying authorities. Upon request, these authorities can certify the design of your slewing bearing solutions and witness testing. While individual divisions have been approved for quality certification in accordance with ISO 9001 and other customer specific requirements.

Install and commission
LDB Life Cycle Management features a range of expert services, training and products to provide timely, accurate commissioning of new and replacement machinery. Our offers include flatness measuring and machining of slewing bearing seatings or resin grout installation for larger slewing bearings.

Operate and monitor
By collecting and analyzing the correct operating data, LDB can help you identify the need for machinery maintenance activities. We can help protect your slewing bearing solutions against unexpected failures and costly downtime with grease and oil analysis, wear surement,
vibration monitoring and ultrasonic inspection of the bearing’s structural integrity.

Maintain and repair
LDB maintenance and remanufacturing services include everything from inspection to complete restoration to the full working specifications of slewing bearings, by using adapted and controlled processes to extend the service life of the slewing bearing.

Slewing driver application

slewing bearing solutions and services

LDB slewing bearing solutions and services Optimize performance and service life

For more than 20 years, LDB has been designing and manufacturing many types and sizes of igh-performance slewing bearings to meet the specific needs of customers worldwide. Combining decadesof application knowledge, unmatched manufacturing expertise and our Life Cycle Management approach, LDB provides customized slewing bearings with outer diameters from 0,1 m to 18 m (>8 m to 18 m are segmented).

Unlike other providers of slewing bearings,LDB can offer fully tailored slewing bearing solutions with integrated advanced monitoring,lubrication and sealing systems for higher reliability and longer service life. Our wide range of expert slewing bearing services also help cut costs and optimize performance, while our global presence allows slewing bearing solutions and services to be delivered quickly around the world.