Please click on the tabs below for more information on Fabreeka’s solutions for your application.
- Building & Construction
- • Bridges
- • Buildings
- • Elevators
- • Stacks
- • Cranes
- Industrial Machinery
- Metal Forming
- Military / Defense
- MRI / NMR
- Petroleum / Gas
- Power Generation
- Precision Equipment
- Pulp & Paper
- Rotating / Vibrating Equipment
- Test Equipment
- • Aerospace Testing
- • Aircraft Testing
- • Auto / Vehicle Testing
Fabreeka International has been providing consulting engineers and contractors with engineered material solutions and vibration consulting for over 70 years.
Fabreeka’s experience includes the dynamic response of steel fabrications and support structures. Our services include measuring building floor vibration, displacement response of floors/mezzanines and FEA modeling of structures to predict performance. Additionally, Fabreeka provides bearing pads and expansion bearings for buildings, bridges and structures. Fabreeka now offers a thermal insulation, or thermal break, material to prevent thermal bridging in structural connections.
Fabreeka Bedding pads have been successfully used for many years under steel bridge shoe masonry plates to provide uniform load distribution on highway and railroad bridges.
Fabreeka Bridge Rail pads have made the installation of railings simpler and more efficient. SA-47 pad is supplied to the size and shape of the rail support contact area. The pad evenly distributes the loading and hold-down forces from the bolts by conforming to the irregularities of the concrete surface. High compressive strength and limited creep characteristics distinguish this material from typical unreinforced neoprene pads. The durability of the Fabreeka Bridge Rail pads makes them an excellent alternative to epoxy and grout installation methods.
In use since 1966, Fabreeka’s Drain Trough material is a flexible water drainage system for use on roadway bridges and overpasses. Designed for installation under the expansion joint fingers, these flexible troughs channel water into rigid down spouts and avoid water dripping on vehicles passing under the bridge.
Fabreeka Lamp Post pads are an excellent and economical way to dampen shock and vibration induced by wind and traffic. Pads are supplied to the exact size, shape and bolt hole pattern of the lamp post base. Lamp post pads help to evenly distribute loadings and adapt to any irregularities in the concrete mounting surfaces while providing damping to reduce post motion. Additionally Fabreeka washers and bushings are utilized to completely isolate the lamp post from transmitted vibration.
Fabreeka structural expansion bearings, provide a durable sliding surface with a low coefficient of friction to allow for thermal expansion and contraction in bridges. These bearings can include an elastomeric bearing pad to compensate for rotation. The structural expansion bearings can be used on steel and precast concrete bridges.
Fabreeka’s isolation solutions prevent disturbing shock and vibration from causing structural damage or acoustic discomfort for occupants in buildings and other structures. Many buildings have been successfully isolated from subway or other environmental inputs by providing materials for the base slabs and column footings.
Fabreeka’s experience includes the dynamic response of steel fabrications and support structures. Our services include measuring building floor vibration, displacement response of floors/mezzanines and FEA modeling of structures to predict performance.
Fabreeka’s thermal insulation material (Fabreeka-TIM®) provides a thermally efficient, energy-saving product that prevents thermal bridging in structural connections. Fabreeka-TIM® is a load bearing thermal break used between flanged steel connections. The primary benefit is that it maintains structural integrity while reducing heat loss.
Fabreeka structural expansion bearings provide a durable sliding surface with a low coefficient of friction to allow for thermal expansion and contraction in buildings and structures. The structural expansion bearings can be used in all steel and concrete structures.
Fabreeka pads, washers and bushings have long been used to eliminate objectionable structure-borne noise in buildings from the operation of passenger elevators. The installation of the pad, washer and bushing combination completely isolates the transmission path of structure-borne noise and vibration.
Roller Guide Tires – Fabreeka pad material is used as roller guide tires attached to the side of the cab to bear against the stationary frame to cushion side impact. Excellent wearing characteristics combined with the vibration and shock absorbing capabilities of the Fabreeka pad, make it an ideal material for this application.
Elevator Car Isolation – Fabreeka pads, washers and bushings are used to insulate the metal contacts between the car crosshead (hoisting cable attachment) and the car body. This prevents the transmission of vibration from the hoisting machinery through the cables to the car.
Car and Counterweight Rail Brackets – Fabreeka pads, washers and bushings are placed between the rail brackets and building structure to provide structure-borne noise isolation.
Motor Hydraulic Pump Unit – Fabreeka pads, washers and bushings are used to isolate the bolted connections to the supporting structure. In some instances, Fabcel pads can also be used under lighter loads and when disturbing frequencies are lower.
It is important to remember that any metal-to-metal or metal-to-concrete point of contact can transmit structure-borne noise. Fabreeka pads, washers and bushings are recommended at all such points to prevent this vibration “short-circuit”.
Steel stacks have relatively low inherent structural damping. Therefore, excessive top-of-stack deflection can result at critical wind speeds due to vortex shedding. To keep these deflections within acceptable limits, damping must be added to the “stack-foundation-soil” system.
A Fabreeka damping ring of preformed fabric pad material is placed between the stack base plate and concrete foundation. Fabreeka washers/pads are placed between steel washers/plates under the anchor bolt nuts.
Helical strakes and tuned dampers are other methods used to control top-of-stack deflection due to vortex shedding. However, the wind drag load can increase resulting in added costs for stack material and foundation size to resist this added load.
Fabreeka Crane Rail pad material is used to reduce vibration, stresses and mechanical wear and tear associated with bridge, gantry and ore crane operation, thereby reducing maintenance costs.
Fabreeka Crane Rail pads are designed to relieve girder stress, improve load distribution, eliminate mechanical wear of flange or cover plates, dampen vibration and reduce noise. The laminated thermoset plastic (LTP) surface of the crane rail pad improves wear resistance, restricts lateral movement and provides a low coefficient of friction support for the rail. Tests performed by independent sources have shown up to 40% reduction in runway beam web stress and noise levels reduced substantially when using Fabreeka Crane Rail pad.
In many cases, manufacturing and quality control must co-exist in workcells or in close proximity to one another. For certain machine tools, the permissible amplitudes of foundation vibrations in a manufacturing environment are very low. It often is very difficult to decrease or isolate vibration amplitudes by simply pouring a new foundation on soil. It also may not be possible to increase the stiffness (rigidity) of the machine support structure (floor) itself to avoid resonance or amplification of vibration. In these cases, unacceptable vibration amplitudes can be significantly reduced by using vibration isolators.
Fabreeka isolation materials and machine mounts provide vibration isolation and leveling for proper machine tool installation.
In certain applications, it is not desirable or feasible to mount a machine directly on vibration isolators.
Installing vibration isolators on a machine whose frame/bed requires a stiff connection can cause bending, relative displacement (sag) and other problems, even when the floor is sufficiently rigid. In this case, the frame/bed is attached to a properly designed concrete foundation, which is then supported on the appropriate isolators for the application.
Certain types of machine tools are not inherently rigid and therefore need a rigid support to maintain their prescribed accuracy. In other types of machinery (such as printing presses) consisting of articulated components, a rigid support may be needed to maintain the proper alignment of working parts.
Designing foundations supporting machine tools requires sound engineering procedures for a reliable result. An incorrectly designed foundation is extremely difficult to correct once installed. Engineering disciplines involved in the proper design procedures for isolated support foundations include theory of vibrations, geotechnical engineering (soil characteristics) and structural design/analysis.
Metal forming equipment including forging hammers, presses and punch presses can be a major generator of impact shock and vibration disturbances in a plant, thereby causing problems for sensitive equipment within the plant, offices in the building or even causing disturbances with neighbors. The main problem is shock transmission, and the secondary problem is the ensuing high frequency vibration caused by the shock.
Fabreeka and Fabcel pads have been successfully used on metal forming equipment to reduce shock in the form of bumpers or mounting pads and to reduce vibration transmission as mounting pads or within a machine’s structure.
Fabreeka has provided shock isolation for forging hammers and presses since 1953. The Fabreeka pad is widely used in forging hammers to absorb the energy of the blow and protect the hammer supporting structure. Fabreeka pads, isolation mounts and coil spring isolators offer a solution for any hammer or press installation.
The measuring speed and accuracy of Coordinate Measuring Machines (CMM’s) are improving every year. Newer CMM’s are being designed and built to be shop floor “hardened” so they can function with repeatability right on the production floor. Vibration is one environmental factor which can compromise a CMM’s accuracy and repeatability.
Ideally, if all components of a CMM, including the part to be measured, were to vibrate in unison at a specific frequency, amplitude, phase and orientation, no degradation in measured performance would result.
Without compromising accuracy, CMM manufacturers provide their users with the maximum levels of vibration which their machines are capable of withstanding. This allowable vibration criteria is an important factor when considering if a machine requires vibration isolation or not.
When isolation is required, it is typically low frequency (less than 30 Hz) vibration that requires attenuation. Fabreeka pneumatic isolators (PAL Isolators and PLM Mounts) provide significant vibration isolation for metrology equipment requiring low frequency vibration control.
An increase in biomedical research and advancements in science and semiconductor manufacturing have created the need for highly accurate microscopes. Measurements and magnifications are being made within microns and angstroms using atomic force, scanning probe, optical and electron microscopes.
Due to the ultra-high resolution requirements, most of these microscopes are installed using PAL low frequency, pneumatic isolation systems which provide attenuation in laboratories and cleanrooms where human footfalls and structural vibration can otherwise decrease performance and accuracy.
Biomedical research includes the manipulation of cells and the study of neurons and neural networks under magnification. Cell biologists and electro physiologists conducting cell injection, in-vitro, patch clamping and neuro analysis require a vibration-free environment that can be obtained using low frequency isolation.
Fabreeka isolation products are used on a variety of military applications to attenuate shock and vibration and reduce structure-borne noise. The original, resilient Fabreeka laminated Fabreeka pad still sets the standard for conformance to the difficult range of specifications required by government agencies. Fabreeka isolation materials are used on all types of ground support equipment vehicles from tanks to personnel carriers. Fabreeka pad is also used to absorb shock in armaments including applications on the F-16 fighter plane and the new MRAP vehicle.
DIMFAB pads have been used onboard surface and undersea vessels to isolate vibration and structure-borne noise. DIMFAB 280 mounting pads meet or exceed Navy specifications regarding environmental requirements including salt spray, temperature storage, oil immersion, ozone etc. Typical isolated equipment on vessels includes propulsion systems, communications equipment, electrical and hydraulic equipment and reciprocating machinery.
Fabreeka pads, washers and bushings have long been used to eliminate impact shock and vibration in a wide variety of mining operations including draglines/shovels, mine cars, crushers, chutes/hoppers, grizzlies, rock breakers, feeders, screens, pulverizers and smelting operations.
In these applications where foundations and structures are broken or damaged due to large impacts, Fabreeka pads are used to protect and prolong equipment use. Fabreeka pad material is also used to improve the service life of the upper and lower rails on draglines and shovels by reducing the high roller load stress.
The types of mines in which Fabreeka material has been used include aluminum, copper, iron, precious metals (gold, silver), lime, phosphate, asbestos, uranium, salts, nitrate, gems, lithium, beryllium.
Fabreeka’s commitment to the science of vibration control is shown by the technical expertise, product knowledge and design solutions offered to our customers. Fabreeka has provided vibration isolation solutions for all types of high resolution MRI, NMR and Cryostat equipment ranging in size from 300 MHz to 900 MHz.
All pneumatic isolator hardware for NMR applications is made non-magnetic using stainless, aluminum or brass and is designed to interface with the existing magnet support brackets at the desired height.
A major problem facing companies with gas transmission and petrochemical piping is fatigue failures caused by vibration. High frequency (ultrasonic and hypersonic) gas pulsations at natural gas transmission line compressor stations cause metal fatigue in piping and valves.
To eliminate excessive vibration, a properly designed mechanical restraint is required. The application of Fabreeka Preformed Fabric Pad with high damping within these mechanical restraints can provide isolation of piping vibrations, thermal flexibility, reduction of unwanted noise and prevent non-uniform clamp contact pressure.
Fabreeka Pad is available in a range of thicknesses to accommodate any design application and is available with a PTFE Teflon® surface for thermal expansion and insulation for high temperatures.
Vibration is also present on drilling rigs. Created by mud pumps, compressors, generators and other rotating equipment, the vibration from the equipment is transmitted to the decks on the rig. Fabreeka provides isolation materials for drilling rig equipment to make the rig as “quiet” as possible and reduce structure fatigue.
For decades, Fabreeka isolation materials have been used to control structure-borne vibration and noise generated from power and distribution transformers and reactors. In recent years, Fabreeka pads, Fabcel pads and isolation washers and bushings have been used in wind turbines to provide vibration isolation under gear boxes and generators. Fabreeka isolation materials are also used to prevent metal to metal contact on rotating parts with the rotors to reduce wear and fatigue.
Fabreeka engineers also work with consultants who design power generation facilities involving steam and gas turbine foundation isolation and other turbo-machinery vibration attenuation requirements.
The degree of precision required for precision machine tools is ever-increasing. Equipment that cuts, turns, polishes and positions with nanotechnology can provide finishes and measurements within microns and even angstroms.
Ultra-precision equipment is used in many industries including semiconductor wafer processing, optics/lens manufacturing and non-standard material machining processes.
Machine capabilities include ultra-precision turning and microgrinding of materials such as optical glass, crystals, non-ferrous metals, polymers and ceramics. The surfaces of these materials are machined such that the results typically require little or no polishing with surfaces having sub-micron finishes. Products made via this process include CD’s, contact lens tooling, optical lens components and mirrors for laser applications.
Fabreeka provides precision equipment manufacturers and end users with PAL and PLM, low frequency vibration and shock isolation systems to maintain the designed accuracy of this equipment. Some applications require custom systems and structural analysis and design of the support structures and frames used in conjunction with the isolation system and integrated in the machine design.
The initial handling of logs is the same whether they are being processed for lumber or for paper making pulp. In either case, the logs are first run over debarker rolls to remove the bark, and then they are picked up by carriage rolls and fed into band mill saws.
When lumber is being processed for use in the making of paper pulp, it is taken from the band mill saws on roller conveyors first into chippers, then mixing tanks and finally vibrating screens.
Mechanical and chemical pulp and paper mills both have equipment in their processes which produce high levels of vibration and shock.
Fabreeka pads, washers and bushings, as well as Fabcel pads have long been used to eliminate impact shock and vibration in many pulp and paper applications including debarkers, chippers, hogs, conveyors and pump stations.
With the demand for higher quality and volume, newsprint plants use printing presses with high speeds to provide them with the competitive edge. Rotary offset presses, with standard operating production speeds of 1400-1800 rpm, can produce vibration that is transmitted through the building structure. This can negatively affect the quality of the print and the environment of the workers.
Previous installations have shown that Fabreeka pads have reduced high frequency vibrations by as much as 80% in critical press applications, while remaining stiff enough to maintain press alignment and trim.
Fabreeka isolation products provide vibration control on a wide variety of rotating and reciprocating machinery and equipment that produce vibration during operation. Our engineers work closely with OEM’s as well as end users to obtain the operating frequencies, dynamic (unbalanced) loads, critical alignments and isolation mount specifications for a complete isolation solution.
Applications using our Fabreeka or Fabcel isolation pads, washers and bushings include fans, blowers, motors, reciprocating and screw type pumps and compressors, engine-generator sets, gear boxes and generators.
Much of the equipment used to manufacture steel is massive and when this equipment is in operation, heavy impacts (shock) and vibrations are generated. The equipment is often operated 24 hours a day, 7 days a week, and shutdown for repairs results in reduced production and increased cost. There are many applications in steel mills where Fabreeka pad is used to protect equipment, structure and foundations from damage by impact shock and vibration. The design and installation of Fabreeka pad greatly reduces fatigue of metal parts and deterioration of concrete supporting structures, thus lengthening their service life and reducing downtime and cost of maintenance.
Fabreeka pad is currently used as a bumper to reduce impact shock on cold bar shears, mill tables and coil drops where steel ingots or coils of steel are handled and dropped, creating large forces and stresses within the equipment.
Fabreeka pads have also successfully replaced coil springs on ingot buggies and hot metal cars providing the necessary cushioning in the journal box area of the equipment. Fabreeka engineers work closely with consultants who specialize in steel mill production to provide shock and vibration solutions for equipment within the steel manufacturing process.
Fabreeka International has a leading role in providing vibration isolation systems and design techniques to meet the increasing demands of automotive and aerospace testing in simulated environments.
Solutions for auto testing include the design of test equipment support foundations (reaction masses) including structural and dynamic analysis. Applications include dynamometers, rolling roads, road simulators, multi-axis shaker tables and other test equipment.
When performing testing of large spacecraft or hardware that will be launched into orbit, it is necessary to conduct the tests in a space-simulated environment. To achieve this, a vacuum chamber or thermal vacuum chamber is used, which creates an environment to simulate the pressure and thermal effects of space travel in orbit.
It is necessary to decouple the spacecraft/payload from the chamber using vibration isolators to attenuate environmental vibration from the testing. In some cases where feasible, the entire chamber with payload is decoupled from the test facility.
Additionally, Fabreeka provides isolation solutions for material testing machines including tensile, compression and fatigue testing equipment that can create vibration and shock.
Fabreeka provides low frequency vibration isolation systems for critical testing applications in the aerospace/defense industry, which require ultra-low frequency isolation. Applications often include nano-type measurements and can have error budgets within microns or tenths of arc seconds.
When performing testing of large spacecraft or hardware that will be launched into orbit, it is necessary to conduct testing in a space-simulated environment. To achieve this, a vacuum chamber or thermal vacuum chamber is used, which creates an environment to simulate the pressure and thermal effects of launch or space travel in orbit.
In cases where the size of the chamber, or the existing chamber, does not allow for “external” isolators, the test payload must be isolated inside the chamber. To achieve this, a vacuum compatible isolation system is used. When isolators are used inside a vacuum chamber, they must meet strict material specifications to limit outgassing and be constructed to meet particulate and molecular cleanliness requirements as well. Additionally, in thermo-vacuum applications, the isolators may be required to operate in temperature extremes where heater blankets are necessary to keep the isolators at an operable temperature.
Fabreeka has designed a number of “soft support systems” (SSS) using standard and custom pneumatic isolators for ground vibration testing (GVT) of aircraft. To obtain accurate results during GVT, the modal testing of the aircraft requires simulation of a “free-free” condition. To achieve this condition, Fabreeka works with the structural and dynamics testing groups of aircraft manufacturers to design the required SSS for the GVT.
The pneumatic isolators support and decouple the aircraft from the ground when the aircraft is undergoing dynamic testing and modal/flutter analysis. The role of the system is especially important in identifying structural resonances and validating flutter models. The SSS can also include a jacking system to lift the aircraft off of its landing gear.
Fabreeka International has a leading role in providing vibration isolation systems and design techniques to meet the increasing demands of vehicle testing in simulated environments.
Fabreeka regularly provides isolation solutions for many applications including dynamometers, engine test rigs, road simulators and multi-axis shaker tables. Fabreeka’s technical expertise includes the structural design of support structures and reaction masses; static and dynamic analysis and acceptance testing.
Vibration and noise resulting from wheel rail loads can be easily transmitted through the vehicle journal boxes and springs and into the vehicle body. Fabreeka and SA-47 pads have been used for over 50 years on journal boxes, spring planks, center plates and under bolster springs to reduce wear and fatigue.
Fabreeka and SA-47 bearing pads are also widely used as tie plate pads under rails and crossings and as bridge deck pads on railroad bridges.