Applications

rotary and linear lightweight bearings

With a collective knowledge and experience of over 75 years in engineering machine build applications, our team strive to collaborate with our customers, to ensure we offer expert solutions for a wide variety of projects and applications. A broad range of applications that have used Franke Bearings can be seen below.

Rotary Bearings

Cardanic Suspension of Aerial Camera

Requirements
Light, customised bearings are required for the articulation of the cardanic suspension; they must possess high stiffness while
at the same time remaining smooth and with low breakaway torque and rotational resistance. Forces and torques occur from all directions. The bearings must not impede the camera's imaging quality.


Solution
LDB155 on high-strength aluminium with customized bore pattern. Anodized-orange by request of the customer.


Advantages
Bearing material, design and coating based on customer specifications. The 4-point contact bearing can accommodate forces from all directions and is insensitive to temperature fluctuation and vibrations. Smooth bearing with concomitant, high stiffness, at a favorable price.

Cardanic Suspension of Aerial Camera

Requirements
Light, customised bearings are required for the articulation of the cardanic suspension; they must possess high stiffness while at the same time remaining smooth and with low breakaway torque and rotational resistance. Forces and torques occur from all directions. The bearings must not impede the camera's imaging quality.

Solution
LDB155 on high-strength aluminium with customized bore pattern. Anodized-orange by request of the customer.

Advantages
Bearing material, design and coating based on customer specifications. The 4-point contact bearing can accommodate forces from all directions and is insensitive to temperature fluctuation and vibrations. Smooth bearing with concomitant, high stiffness, at a favorable price.

Cardanic Suspension of Aerial Camera

Requirements
Light, customised bearings are required for the articulation of the cardanic suspension; they must possess high stiffness while
at the same time remaining smooth and with low breakaway torque and rotational resistance. Forces and torques occur from all directions. The bearings must not impede the camera's imaging quality.

Solution
LDB155 on high-strength aluminium with customized bore pattern. Anodized-orange by request of the customer.

Advantages
Bearing material, design and coating based on customer specifications. The 4-point contact bearing can accommodate forces from all directions and is insensitive to temperature fluctuation and vibrations. Smooth bearing with concomitant, high stiffness, at a favorable price.

Cardanic Suspension of Aerial Camera

Requirements
Light, customised bearings are required for the articulation of the cardanic suspension; they must possess high stiffness while at the same time remaining smooth and with
low breakaway torque and rotational resistance. Forces and torques occur from all directions. The bearings must not impede the camera's imaging quality.


Solution
LDB155 on high-strength aluminium with customized bore pattern. Anodized-orange by request of the customer.


Advantages
Bearing material, design and coating based on customer specifications. The 4-point contact bearing can accommodate forces from all directions and is insensitive to
temperature fluctuation and vibrations. Smooth bearing with concomitant, high stiffness, at a favorable price.

Satellite Antenna on Seagoing Vessels

Requirements
The bearing requires high stiffness across its entire service life (shock stress due to waves and swell). The system must possess non-corrosive properties and provide constant rotational resistance across temperature ranges from –25°C to +60°C.

Solution
The bearing assembly LDA166 in its steel version with adjusting ring, including coating and LER bearing element.

Advantages
The steel solution delivers constant rotational resistance across the entire temperature range. An additional inlet process with readjustment guarantees high stiffness over the whole service life.

Satellite Antenna on Seagoing Vessels

Requirements
The bearing requires high stiffness across its entire service life (shock stress due to waves and swell). The system must possess non-corrosive properties and provide constant rotational resistance across temperature ranges from –25°C to +60°C.

Solution
The bearing assembly LDA166 in its steel version with adjusting ring, including coating and LER bearing element.

Advantages
The steel solution delivers constant rotational resistance across the entire temperature range. An additional inlet process with readjustment guarantees high stiffness over the whole service life.

Requirements
A concept vehicle is to be motorized by one direct drive unit per wheel. This requires a bearing system with compact mounting space and sufficient load-bearing capacity. The maximum revolutions is 1000 rpm. The balls must be non-magnetic, as they are fitted adjoining the direct drive.

Solution
Four LES0380 – 5/9.525, including ceramic balls.

Advantages
Customized bearings for direct integration in the customer-side design. Accommodation of forces from all sides, including tilting torque. Mounting space designed in cooperation with the customer. Joint assembly of the prototype at Franke.

Requirements
A concept vehicle is to be motorized by one direct drive unit per wheel. This requires a bearing system with compact mounting space and sufficient load-bearing capacity. The maximum revolutions is 1000 rpm. The balls must be non-magnetic, as they are fitted adjoining the direct drive.

Solution
Four LES0380 – 5/9.525, including ceramic balls.

Advantages
Customized bearings for direct integration in the customer-side design. Accommodation of forces from all sides, including tilting torque. Mounting space designed in cooperation with the customer. Joint assembly of the prototype at Franke.

Aircraft Laser Optics

Requirements
Wire race bearings with high rigidity and highest accuracy are required for use in aircraft protection. The bearings must be able to compensate for thermal expansion.

Solution
Bearing assembly LDB80 / 295 as cylindrical roller bearing made of aluminium with a diameter of 295 mm.In addition, another bearing assembly is used in the form of a three-point bearing.

Advantages
The bearing assemvly type LDZ has a running accuracy of 0.03 mm. Weight saving is achieved by the lightweight aluminum construction. The load ratings, the rigidity and the accuracy of the bearing are determined by the races. The second bearing has a support angle of 45 ° (three-point bearing). The outer ring is movable to optimally compensate for the thermal expansions that occur.

Aircraft Laser Optics

Requirements
Wire race bearings with high rigidity and highest accuracy are required for use in aircraft protection. The bearings must be able to compensate for thermal expansion.

Solution
Bearing assembly LDB80 / 295 as cylindrical roller bearing made of aluminium with a diameter of 295 mm.In addition, another bearing assembly is used in the form of a three-point bearing.

Advantages
The bearing assemvly type LDZ has a running accuracy of 0.03 mm. Weight saving is achieved by the lightweight aluminum construction. The load ratings, the rigidity and the accuracy of the bearing are determined by the races. The second bearing has a support angle of 45 ° (three-point bearing). The outer ring is movable to optimally compensate for the thermal expansions that occur.

CT Scanner

Requirements
The main bearing on the computer tomography machine is one of the elements responsible for ensuring that precise images are delivered. It must run quietly and with low vibrations, even at high speeds. It is necessary to guarantee exact radial and axial run-out.

Solution
A customized, patented Franke Flüsterlager® with elastomer.
Besides excellent running, the Franke CT bearings also come with ideal rotational resistance. The radial and axial run-out is just a few hundredth millimeters, depending on the engineering and diameter. All Franke CT bearings can be calibrated to suit customer specifications. The inner elasticity keeps the bearing outstandingly robust, even when exposed to the toughest conditions of use.

Advantages
Extremely smooth running at up to 300 rpm. The elastomer suppresses the noise generation (60dBA). The bearing possesses a low rotational resistance (< 20Nm) and electrical insulation between the inner and outer ring. Loads in excess of 1000kg are possible.

CT Scanner

Requirements
The main bearing on the computer tomography machine is one of the elements responsible for ensuring that precise images are delivered. It must run quietly and with low vibrations, even at high speeds. It is necessary to guarantee exact radial and axial run-out.

Solution
A customized, patented Franke Flüsterlager® with elastomer.
Besides excellent running, the Franke CT bearings also come with ideal rotational resistance. The radial and axial run-out is just a few hundredth millimeters, depending on the engineering and diameter. All Franke CT bearings can be calibrated to suit customer specifications. The inner elasticity keeps the bearing outstandingly robust, even when exposed to the toughest conditions of use.

Advantages
Extremely smooth running at up to 300 rpm. The elastomer suppresses the noise generation (60dBA). The bearing possesses a low rotational resistance (< 20Nm) and electrical insulation between the inner and outer ring. Loads in excess of 1000kg are possible.

Hubless Rim on a Formula Student Race Car

Requirements
The aluminium-carbon rim on an electric race car should be designed to accommodate the drive and braking systems in its center. The bearings used must require very little mounting space and possess a large open center. Plus they need to securely transfer substantial forces and torques.

Solution
Franke Wire Race Bearing, integrated directly in the housing components of the rim as double row angular contact ball bearings. The Wire Race Bearing handles the prevalent loads and works independent of the material used in the mating components. The wires and the rolling elements require minimal mounting space.

Advantages
Space-saving bearing solution with large open center. Its arrangement as double row angular contact bearings permits extremely dynamic movement processes.

Hubless Rim on a Formula Student Race Car

Requirements
The aluminium-carbon rim on an electric race car should be designed to accommodate the drive and braking systems in its center. The bearings used must require very little mounting space and possess a large open center. Plus they need to securely transfer substantial forces and torques.

Solution
Franke Wire Race Bearing, integrated directly in the housing components of the rim as double row angular contact ball bearings. The Wire Race Bearing handles the prevalent loads and works independent of the material used in the mating components. The wires and the rolling elements require minimal mounting space.

Advantages
Space-saving bearing solution with large open center. Its arrangement as double row angular contact bearings permits extremely dynamic movement processes.

Rotary Table Index

Requirements
The bearing used must guarantee smooth and clean operation of the rotary tables in their designated applications, and must also ensure high repeatability precision with simultaneous positioning accuracy.
The system moves heavy payloads.

Solution
Bearing elements LEZ with bearing diameter 400 to 1500mm.
Engineered with a variety of wire races and ball combinations.

Advantages
The Franke LEZ bearing elements used are designed precisely to suit the various loads and hence guarantee smooth and clean movements of the rotary tables. Additionally, the 4-point system has no difficulty withstanding the prevailing loads.

Rotary Table Index

Requirements
The bearing used must guarantee smooth and clean operation of the rotary tables in their designated applications, and must also ensure high repeatability precision with simultaneous positioning accuracy.
The system moves heavy payloads.

Solution
Bearing elements LEZ with bearing diameter 400 to 1500mm.
Engineered with a variety of wire races and ball combinations.

Advantages
The Franke LEZ bearing elements used are designed precisely to suit the various loads and hence guarantee smooth and clean movements of the rotary tables. Additionally, the 4-point system has no difficulty withstanding the prevailing loads.

Circular Knitting Machine

Requirements
The main bearing in the knitting machine plays a crucial role in the quality of the knitted goods. The highest standards are placed in the precision and operating performance of the bearing, despite the high mechanical and thermal load. The required speeds are up to 60 rpm.

Solution
A ground bearing element from the LEL series with a ball pitch diameter of 400 to 1500mm, made of chromium-silicon, ensures even, smooth running, even in the smallest mounting space. High precision of the bearing in axial and radial runout (<0.03mm) and the outstanding surface quality of the raceways ensure a constantly high quality of the machine.

Advantages
LEL with wire diameter of 4mm, ball diameter of 3/8’’, 8, 10 or 12 mm. The carrying angle is 45°; in special cases even 53°, due to the mainly axial load. Standard speed are at 30 rpm, and up to 60 rpm for smaller ball pitch diameters The axial load caused by the machine cylinder is around 4000N, depending on the machine type.

Circular Knitting Machine

Requirements
The main bearing in the knitting machine plays a crucial role in the quality of the knitted goods. The highest standards are placed in the precision and operating performance of the bearing, despite the high mechanical and thermal load. The required speeds are up to 60 rpm.

Solution
A ground bearing element from the LEL series with a ball pitch diameter of 400 to 1500mm, made of chromium-silicon, ensures even, smooth running, even in the smallest mounting space. High precision of the bearing in axial and radial runout (<0.03mm) and the outstanding surface quality of the raceways ensure a constantly high quality of the machine.

Advantages
LEL with wire diameter of 4mm, ball diameter of 3/8’’, 8, 10 or 12 mm. The carrying angle is 45°; in special cases even 53°, due to the mainly axial load. Standard speed are at 30 rpm, and up to 60 rpm for smaller ball pitch diameters The axial load caused by the machine cylinder is around 4000N, depending on the machine type.

Articulated Robot

Requirement
The lightweight robot is used as a service robot and mobile robot. The net weight of the robot is 10kg with a rated load of 3kg. It consists of CFK materials with good rigidity and low mass.
Bearings are planned for use in the movement axes. Their main requirements are also high stiffness, low weight and small mounting space.

Solution
Bearing elements in the LEZ64 and LEL84 series.

Advantages
Bearing elements only require minimal mounting space and are
built in directly to the design of the robot. The material of the
mating structure does not therefore depend on the bearing and
can be freely selected. High bearing strength in all directions.

Articulated Robot

Requirement
The lightweight robot is used as a service robot and mobile robot. The net weight of the robot is 10kg with a rated load of 3kg. It consists of CFK materials with good rigidity and low mass.
Bearings are planned for use in the movement axes. Their main requirements are also high stiffness, low weight and small mounting space.

Solution
Bearing elements in the LEZ64 and LEL84 series.

Advantages
Bearing elements only require minimal mounting space and are
built in directly to the design of the robot. The material of the
mating structure does not therefore depend on the bearing and
can be freely selected. High bearing strength in all directions.

X-Ray Device

Requirements
The curved imaging unit of an X-ray device encloses a gurney.
This so-called C-arch must be light and evenly shaped, also
tiltable by hand.

Solution
Franke Wire Race Bearings as segment bearings.

Advantages
Direct integration of the race segments in the housing components saves space and costs. The segment bearing is set free from clearance and can be moved by hand with a defined resistance.The movement is quiet and even. The 4-point contact bearing easily accommodates the high torque forces in any travel position.

X-Ray Device

Requirements
The curved imaging unit of an X-ray device encloses a gurney.
This so-called C-arch must be light and evenly shaped, also
tiltable by hand.

Solution
Franke Wire Race Bearings as segment bearings.

Advantages
Direct integration of the race segments in the housing components saves space and costs. The segment bearing is set free from clearance and can be moved by hand with a defined resistance.The movement is quiet and even. The 4-point contact bearing easily accommodates the high torque forces in any travel position.

Placement Head for Printed Circuit Board Production

Requirements
Bearing for a high-performance placement head in printed circuit board production with a cycle frequency of 18 start/stop movements per second and up to 120 million revolutions over five years. The service life is defined as ten years. The bearing must be free from clearance in all directions at 70 °C so that the components can be fitted precisely.

Solution
Franke special bearing assembly LDB0110. Aluminium (Dispal) is used as the material for the inner and outer ring. It has almost the same thermal expansion coefficient as steel, facilitating constant unit set values across the entire temperature range.

Advantages
Customer-specific design, which meets all requirements with regard to size, material and mounting dimensions. The integrated bearing element has a small cross section, giving the customer a compact, but nevertheless lightweight design. Franke is the only manufacturer worldwide that can satisfy these specifications.

Mobile Satellite Antenna
Requirements
The main bearing for a mobile satellite antenna must not weigh over 1kg. Smooth running with simultaneous tilting stiffness must be guaranteed.


Solution
Franke bearing assembly LDB200 made of aluminium,
with inner ring geared on the outside.


Advantages
Complete bearing assembly, ready for installation, made of aluminium and with tooth belt gear. Large open center and low mounting space thanks to the compact structure.

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Linear Bearings

Mattress production

Requirements
Bonding points to bond the mattresses are positioned in the center of the gantry. The guides are used to travel to the gantry along the x and y axes. The assembly surfaces of the guides are not processed in order to save costs.

Solution
The aluminium roller guide FDA25 in a length of 2000mm.

Advantages
The guide unit, motorized by a toothed belt, travels at a speed of 50m/min. The guide is fitted directly to the unprocessed aluminium substructure. This involves mounting aluminium on aluminium, which means there is no bi-metal effect in the event of temperature fluctuations. This cost efficient solution makes the system competitive. Customers achieve maximum drive performance using the aluminium roller guide. The system preload is infinitely variable to suit the requirements.

Mattress production

Requirements
Bonding points to bond the mattresses are positioned in the center of the gantry. The guides are used to travel to the gantry along the x and y axes. The assembly surfaces of the guides are not processed in order to save costs.

Solution
The aluminium roller guide FDA25 in a length of 2000mm.

Advantages
The guide unit, motorized by a toothed belt, travels at a speed of 50m/min. The guide is fitted directly to the unprocessed aluminium substructure. This involves mounting aluminium on aluminium, which means there is no bi-metal effect in the event of temperature fluctuations. This cost efficient solution makes the system competitive. Customers achieve maximum drive performance using the aluminium roller guide. The system preload is infinitely variable to suit the requirements.

Food packaging

Requirements
The packaging machine works at high speeds. The linear guides used here must be resistant to aggressive media (e.g. salt, sugar, spray water). The machine has stroke lengths of 1500mm to 2100mm. The average mileage of the packaging machine is 30,000km per year.

Solution
The aluminium roller guides in series FDA20.

Advantages
The aluminium roller guides FDA enable speeds of up to 10m/s. The stroke lengths are infinitely variable. Central lubrication on the cassette achieves a high service life and substantial mileage. Grease nipples fitted to the front allow for convenient lubricant replenishment while the guides are fitted.

Food packaging

Requirements
The packaging machine works at high speeds. The linear guides used here must be resistant to aggressive media (e.g. salt, sugar, spray water). The machine has stroke lengths of 1500mm to 2100mm. The average mileage of the packaging machine is 30,000km per year.

Solution
The aluminium roller guides in series FDA20.

Advantages
The aluminium roller guides FDA enable speeds of up to 10m/s. The stroke lengths are infinitely variable. Central lubrication on the cassette achieves a high service life and substantial mileage. Grease nipples fitted to the front allow for convenient lubricant replenishment while the guides are fitted.

Cheese production

Requirements
A linear guide is to be used to hold a cheese wheel in place for the subsequent cutting process. The guides must satisfy the hygienic requirements for use in the food industry. There must be no leakage of lubricant. The system has relatively weak motorization.

Solution
The aluminium roller guides in the system FDA25 with tracks from the series FDC25.

Advantages
The Franke aluminium roller guide operates cleanly and maintenance-free thanks to the food industry-compatible non-corrosive design. It comes with food industry lubrication. The guide can be set to the desired low slide resistance using a grub screw fitted to the side of the cassette. This is used to reduce the drive power applied to the guide.

Cheese production

Requirements
A linear guide is to be used to hold a cheese wheel in place for the subsequent cutting process. The guides must satisfy the hygienic requirements for use in the food industry. There must be no leakage of lubricant. The system has relatively weak motorization.

Solution
The aluminium roller guides in the system FDA25 with tracks from the series FDC25.

Advantages
The Franke aluminium roller guide operates cleanly and maintenance-free thanks to the food industry-compatible non-corrosive design. It comes with food industry lubrication. The guide can be set to the desired low slide resistance using a grub screw fitted to the side of the cassette. This is used to reduce the drive power applied to the guide.

Packaging machine

Requirements
Machine units in a packaging machine need to travel quickly and safely. High clock rates necessitate dynamic movement patterns. Two units are moved on one module.

Solution
Franke linear motor module with two motors.

Advantages
Franke linear motor modules come with linear motors fitted to the guide rails. This engineering reduces the mounting space and enables compact designs. The module bodies are made of aluminium and harmonize perfectly with the aluminium profiles used to assemble the machine. Two motors, controlled separately, ensure highly dynamic movement.

Packaging machine

Requirements
Machine units in a packaging machine need to travel quickly and safely. High clock rates necessitate dynamic movement patterns. Two units are moved on one module.

Solution
Franke linear motor module with two motors.

Advantages
Franke linear motor modules come with linear motors fitted to the guide rails. This engineering reduces the mounting space and enables compact designs. The module bodies are made of aluminium and harmonize perfectly with the aluminium profiles used to assemble the machine. Two motors, controlled separately, ensure highly dynamic movement.

Water jet cutter

Requirements
Cutting with a water jet calls for exact and rapid movements of the cutting head above the work piece to create even and smooth edges and to travel along even more complex geometries.

Solution
Franke linear motor module FTH Drive with integrated direct drive.

Advantages
Lightweight aluminium design for low weight and dynamic movement. The linear motor is integrated in the rail profile. This makes the module extremely flat and ensures it requires very little mounting space. The aluminium body and the non-corrosive running bars make the system insensitive to moisture.

Water jet cutter

Requirements
Cutting with a water jet calls for exact and rapid movements of the cutting head above the work piece to create even and smooth edges and to travel along even more complex geometries.

Solution
Franke linear motor module FTH Drive with integrated direct drive.

Advantages
Lightweight aluminium design for low weight and dynamic movement. The linear motor is integrated in the rail profile. This makes the module extremely flat and ensures it requires very little mounting space. The aluminium body and the non-corrosive running bars make the system insensitive to moisture.

Camera sliders

Requirements
Numerous so-called slider systems are available on the market to move video cameras. The system by the firm SlideShot from Great Britain is a recent addition, which uses Franke linear guides. These systems have the following requirements: smooth and quiet operation, homogeneous movement and low weight.

Solution
Franke Linear Systems in a special design with accessories for photographers.
Available from www.slideshot.co.uk

Advantages
Lightweight aluminium design for low carrying weight, large-scale rollers for smooth and quiet running and a broad range of accessories to adapt in a variety of shooting situations.

Camera sliders

Requirements
Numerous so-called slider systems are available on the market to move video cameras. The system by the firm SlideShot from Great Britain is a recent addition, which uses Franke linear guides. These systems have the following requirements: smooth and quiet operation, homogeneous movement and low weight.

Solution
Franke Linear Systems in a special design with accessories for photographers.
Available from www.slideshot.co.uk

Advantages
Lightweight aluminium design for low carrying weight, large-scale rollers for smooth and quiet running and a broad range of accessories to adapt in a variety of shooting situations.

Dental X-ray device

Requirements
The linear guide is used in the secondary panel of the dental X-ray device. The purpose of the panel is to enable exact X-ray imaging. Here it is important that the unit travels without any oscillation whatsoever. The linear guide must run easily and smoothly.

Solution
The Franke roller guide FDL12 is integrated directly in the customized carriage mount. A lateral grub screw is used to set the slide resistance and hence the stiffness of the entire system. This guarantees movement without any oscillation whatsoever.

Advantages
The guide FDZ12 runs evenly, quietly and cleanly. The elevated preload (0.6 to 0.8N) ensures that the secondary panel travels free from oscillation. The guide comes with lifetime lubrication. The sealed, single-row ball bearings mean that no lubricant can leak to the outside.

Dental X-ray device

Requirements
The linear guide is used in the secondary panel of the dental X-ray device. The purpose of the panel is to enable exact X-ray imaging. Here it is important that the unit travels without any oscillation whatsoever. The linear guide must run easily and smoothly.

Solution
The Franke roller guide FDL12 is integrated directly in the customized carriage mount. A lateral grub screw is used to set the slide resistance and hence the stiffness of the entire system. This guarantees movement without any oscillation whatsoever.

Advantages
The guide FDZ12 runs evenly, quietly and cleanly. The elevated preload (0.6 to 0.8N) ensures that the secondary panel travels free from oscillation. The guide comes with lifetime lubrication. The sealed, single-row ball bearings mean that no lubricant can leak to the outside.

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