GRW

GRW PRODUCT RANGE

Radial Deep Groove Ball Bearing (DGBB)

The radial deep groove ball bearings made by GRW are single row radial ball bearings. They are available in open as well as sealed or shielded versions. They are composed of the following parts and materials:

• Inner and outer ring are made of chrome steel 52100 (100Cr6). For corrosion resistance, bearing steel SS (X65Cr13) or SV (X30CrMoN15-1)
• Ceramic or steel set of balls
• Retaining cage made of sheet steel or plastic in one or two parts design
• Load-carrying lubricant (more than 300 different lubricants in the GRW collection)
• Non-corrosive shields and seals made of sheet steel, Teflon-coated fiberglass fabrics or reinforced Perbunan or fluor caoutchouc

Spindle Ball Bearing -Angular Contact Ball Bearing (ACBB)

GRW develops customized solutions to meet the specific needs in sectors such as aviation and space or medical technology. Among these options our single-row, angular-contact ball bearings stand out to first-rate precision and long-term durability. Commonly known as spindle bearings, they consist of solid inner and outer rings as well as ball sets with window cages.

• Accuracy class of ABEC 7 (DIN P4) and higher
• Contact angle of 15° (C) or 25° (E)
• Corrosion-resistant, high-performance steel
• Balls made from ceramics or steel
• Solid cages made from phenolic resin
• Oil or grease lubrication
• Three defined preload classes (S, M, L) or individual preload force

Micro Gas Turbine Bearings

GRW Micro Gas Turbine Bearings have a special design to help take increased loads and to withstand the demanding RPM’s and temperatures associated with micro gas turbines.

• Rings from high alloyed special steel
• Ceramic balls
• Highest precision
• Full complement of ball or, retainers from special synthetic material
• Temperature +300oC
• RPM 100,000+

Duplex Bearing

GRW develop and manufacture duplex ball bearings for a variety of industries. Pairs of matched bearings come with several advantages:

• Extremely accurate positioning both in radial and axial directions, ranging from pre-defined play to rigid guidance
• Consistent limitation of a system’s deflection
• Higher load capacity in comparison to single ball bearings

Thrust Bearing

Axial, also known as thrust, ball bearings are designed to endure loads working along the axis of a shaft or body. GRW axial ball bearings are the perfect helpers in all kinds of applications where high- capacity axial forces exist. In these applications, aligning rectangular axial forces are necessary for the bearings to attain their full effect.

Precision Bearing Units: Pre-Assembled Ball Bearing Units by GRW

Save time and let the experts at GRW pre-assemble the ball bearing for your applications. Here at GRW, you have the possibility to buy pre-assembled bearing units in blocks. Their products consist of the following parts:

• Single or a number of ball bearings
• Shafts or housings
• Optional spacer rings
• Shim washers or wave washers

GRW have developed special technologies and equipment to achieve maximum precision and strength – ball bearing solutions that completely meet their costumers’ expectations.

Custom-Made Ball Bearings

Special Ball Bearings by GRW: Individual Solutions for Highest Requirements

For an individual solution regarding your ball bearing application that fulfills your needs in special environments, GRW offer you special bearing types for any situation. They develop and design ball bearings individually as per customer request.

Design and Dimension: It’s Your Choice

GRW offer you individual ball bearing solutions to fit your needs perfectly – ranging from linear miniature special bearings to regular-sized products that can withstand extreme conditions such as heat, cold or even contact with harsh chemicals effortlessly. Let GRW know what you’re looking for in a specialty bearing – they will make it possible. Need a specialized miniature ball bearing? You’ve got it. GRW will design the best possible solution for your ideas and requirements.

• Super duplex bearings
• Extra duplex bearings
• Tandem duplex bearings
• Ball bearings with integrated shaft
• Ball bearings with altered outer geometry
• Ball bearings with sealed housing
• Rotation symmetrical high-precision machined parts

Ball Bearing Accessories

BALL BEARING ACCESSORIES: Perfectly adjusted toGRW Ball Bearings

• Spacer shims and wave spring washers
• Retaining rings

GRW Markets and Applications

Versatile Options from GRW Ball Bearings for Different Applications

GRW`s little technical helpers accomplish great things every day. Installed in medical instruments, the bearings save the lives of patients. In space technology, they are used to help us explore outer space. Built into filigree robotic technology, they support several industries. Our ball bearings are indispensable – especially in these sectors:

Healthcare

Ball Bearings for Medical Technologies: Modern High-Quality Products for the Healthcare Industry

• NSF-certified cage materials and lubricants (e.g. H1/H2)
• Corrosion resistant ring- and ball steels
• Ceramics ideally suited for healthcare applications
• Media resistant shields and seals
• Biocompatible lubricants according to DIN EN ISO 10993

• Micro blood pumps – During heart surgeries, ball bearings for the medical technology are tiny lifesavers. They serve as important components in micro-blood pumps, which are, compared to heart-lung machines, less burdensome for the patient. Lowering stress on the body during medical procedures is incredibly important in the improvement of surgical technology: This application is just one-way GRW ball bearings are able to help with that.
• Surgical power tools & Robot-assisted surgery – In meticulous brain and eye surgeries, patience and precision are two key elements. GRW ball bearings are designed to hold a patient’s head in fixing devices perfectly still and in position.
• Prosthesis and exoskeleton – After severe surgeries, it is not always easy for patients to return to their normal day-to-day life. To keep them as comfortable as possible, high-quality medical products are integral to recovery. GRW ball bearings for medical technology are used in prostheses and exoskeletons to help patients move comfortably again
• Respirators – Respirators keep patients alive whenever the endogenous lung-function is reduced. As to that, our ball bearings make an enormous contribution. Our small lifesavers are not only convincing because they run so quietly, but also because they are especially long- lasting and reliable and fulfill the specific expectations, such as a low emission of the used materials.
• Analysis equipment – GRW ball bearings also assist experts in medical laboratories, as well in the analysis itself as in the laboratory automation, such as the preparation or handling of the samples.
• Turbine- and contra-angle handpieces & Handpieces for implantology and facial surgery – GRW’s ball bearings assist to make life easier for patients. With noise-reduction built into their design, our bearings help to reduce drill noise and the stress associated with it. The typical hum of a dentist’s drill and other instruments are radically muted thanks to our high-quality ball bearings. In addition to providing a calm environment, our ball bearings for dental technology are defined by quality, precision and high durability. The patients’ wellbeing is their upmost priority!

Industrial Applications

In high-precision robotics, modern electrical engines, and other highly-efficient machinery GRW ball bearing solutions are indispensable. GRW design and manufacture ball bearings that are configured to the individual needs of the application.

Customised Solutions – The Perfect Ball Bearing for Each and Every Use
From axial to radial load-impact, ball bearings have many different types of usage. At GRW, you will find various ball bearing solutions fitted to your individual needs. In their product range, you will find: ball bearings for extreme temperatures, high-speed bearings, corrosion-resistant ball bearings, ball bearings with dry lubrication and more

• Machine tools and spindles- GRW ball bearings can be found in various tools and spindles. From Turning machines, Milling machines, Grinders, Presses & more, GRW develop ball bearings precisely and meticulously to enable an extra-long durability, offering you the best- possible solution that matches your standards without compromises.
• E-motors – are supposed to run smoothly, noise-less and with low energy consumption – these requirements set high standards to ball bearings for the industry. GRW have developed specific bearing solutions that reduce noise and can take on high speed. GRW high-precision ball bearings helps to make the electric engines on the market as efficient as possible.
• Pumps, gears, ventilators, and drive technology – Whether in pumps, gears or ventilators – GRW ball bearings are installed in all kinds of drive technology.
• Vacuum technology – Conventional lubricants often encounter their limits in Vacuum Environments. GRW, we have developed particular lubricants for extreme environmental conditions. With these specialized lubricants, their ball bearings can work as intended within a vacuum environment. GRW use following materials as coatings for applications in an ultra-high vacuum range:
  • Gold
  • Silver
  • MoS2
  • Teflon
  • Hardcoatings
• Measurement- and control-technology – Whether off-shore in the freezing cold of Scandinavian winters, or in the desert heat: Measuring instruments are needed to collect and process data reliably and correctly. GRW, we manufacture ball bearings for different kinds of control and measurement technologies. Each bearing is specifically attuned to the instruments’ requirements. These little helpers work in tools such as:
  • Rotaryencoder
  • Linearmeasuringsystems
  • Gasmeters
  • Flowmeters
  • Wind direction and speed sensors
  • Generalconstructionlasers
  • Massspectrometers
  • Scale bearings
• Robotics and automation – Automation is an important keyword for future technology. Self- steering and self-regulating machines and plants are on the rise – even today, they work on their own with minimal supervision. To enable a flawless operation, GRW can offer the perfect ball bearing solution for your industrial needs – especially in autonomous applications. Discover high-precision solutions for each and every technology.
• Power tools – GRW’s ball bearings help electric tools and pneumatic devices such as drill chucks work efficiently. High speed, power and precision are the key aspects of processing industrial material like wood, stone or metal. These applications demand high load capacities from durable ball bearings.

Aerospace

Ball Bearings for Aviation and Space by GRW
Satellites, aircraft and testing devices: All rely on precise and reliable technologies that guarantee a flawless and safe operation in extreme heights or outer space. In all these areas, the GRW ball bearings for aviation and space make remarkable contributions.

• Satellites
• Airplanes
• Measuring devices
• Devices for aviation and space
• Safety

Ball bearing solutions for the aviation and space industry are used in many applications and technologies:

• Air circulation systems
• Electronic engine-powered control units
• Fuel supply
• Air-conditioning
• Satellite switching elements
• Navigation tools
•  Cargo
• Supply stations
• Antenna and sun protection systems
• Pressure-regulating systems
•  Measuring and controlling systems

In 1997, as well as in 2003 and 2020, GRW`s high-quality ball bearings for aviation and space were parts of the power modules of the NASA Mars missions. For such scientifically important expeditions, stable constructions and constant controls are essential which begin right in here in the manufacturing stages. At GRW, you profit from the following advantages:

• More than 300 different lubrications (some with MIL specification) for temperatures ranging from -454°F (-270°C) to +842°F (+450°C)
• Vacuum suitable lubrications with gas evolution rates
• Various dry lubrications and coatings
• Control via highly sensitive noise and vibration test stands
• Documentation of the preload, if necessary, according to the “broken-curve-method”
• Constant development and re-evaluation of materials and testing methods

GRW individually manufactured ball bearings fit all safety and quality regulations in the defence technology market. During development, manufacturing, and the final checks they count on the zero- error-principle. Therefore, you as the customer can rely on GRW to provide properly functioning products that not only meet, but also exceed expectations. GRW high- precision ball bearings for the defence industry are the perfect choice with their non-corrosive and durable construction. They endure the toughest conditions during any combat mission: From dusty deserts to stormy seas. In GRW`s aerospace & defence department they are focused on customised ball bearing solutions.

GRW Products Offer Protection and Safety
GRW ball bearings are already used for in the defence industry:

• Rocket equipment and aircrafts
• Image processing systems
• Electric drive systems
• Night-vision devices
• Actuators
• Optical instruments