Barden

Typical Applications

Barden/FAG Angular Contact Bearings

Angular contact bearings in ABEC 7 (P4S) quality from Barden and FAG. These high speed super precision bearings are available with fibre cages, ceramic and small balls, or sealed.

Angular contact bearings have one ring shoulder removed, either from the inner or outer ring. This allows a larger ball complement than is found in comparable deep groove bearings, giving a greater load capacity. Speed capacity is also greater.

Barden’s angular contact bearings have a nominal contact angle ranging from 10° to 25°. they can be used in pre-loaded duplex sets, back to back (DB), face to face (DF) for supporting thrust loads in both directions, or in tandem (DT) for additional capacity.

Angular contact bearings support thrust loads or combinations of radial and thrust loading. They cannot accept radial loads alone. A single angular contact bearing can be loaded in one thrust direction only, this may be an operating load or pre-load.

Separable and non-separable types are both available. Separable bearings are useful where bearings must be installed in blind holes or where press fits are required on the shaft and in the housing. The separable feature also permits dynamic balancing of the rotating components with the inner ring mounted in place without the outer ring and housing

Barden/FAG Deep Groove Bearings

Deep groove ball bearings available from Barden and FAG in ABEC 7 (P4S) quality with high speed fibre, steel or plastic cages, ceramic balls, sealed and shielded.

Deep groove ball bearings have full shoulders on both sides of the raceways of the inner and outer rings and can accept radial loads, thrust loads in either direction, or a combination of loads.

Features:

• Cages – The standard cage is a two-piece steel ribbon type. Most sizes are available with a two-piece riveted phenolic, aluminium-reinforced type. Some sizes are available with a one-piece filled nylon snap-in type. Other options may be available.
• Closures – Most bearings are available in shielded and sealed versions.=
• Lubricant – Lubrication can be specified by the customer or recommended by Barden, based on the
  torque, speed and temperature conditions of the application.
• Loads – Deep groove ball bearings can accept radial loads, thrust loads in either direction, or
  combinations of loads.
• Duplexing – They can be supplied in matched pairs for duplex DB, DF or DT mounting.

Barden/FAG Miniature Angular Contact and Deep Groove Instrument Bearings

Angular Contact Instrument Bearings

Angular contact bearings have one ring shoulder partially or totally removed. This allows a larger ball complement than found in comparable deep groove bearings, hence a greater load capacity. Speed capability is also greater.

Angular contact bearings are assembled to a contact angle by varying the radial clearance. Instrument angular contact bearings have nominal contact angles of either 10° or 15°.

Separable and non separable types are available. In a separable bearing (B type), the cage holds the balls in place so that the outer ring assembly (with cage and balls) can be separated from the inner ring.

Separable bearings are useful where bearings must be installed in blind holes or where press fits are required, both on the shaft and in the housing. The separable feature also permits dynamic balancing of a rotating component with inner ring mounted in place, apart from the outer ring and housing.

Angular contact bearings support thrust loads or combinations of radial and thrust loading. They cannot accept radial loads only — a thrust load of sufficient magnitude must be present. An individual angular contact bearing can be thrust-loaded in only one direction; this load may be a working load or a preload.

Deep Groove Instrument Bearings

Deep groove ball bearings have full shoulders on both sides of the raceways of the inner and outer rings. They can accept radial loads, thrust loads in either direction, or a combination of loads.

The design of deep groove bearings make them suitable for the addition of closures which help exclude contaminants and retain lubrication. Besides single deep groove bearings with closures, Barden also offers duplex pairs with seals or shields on the outboard faces.

Flanged bearings are especially useful in through-bored housings. The inboard side of the flange provides an accurate positioning surface for bearing alignment, eliminating a need for housing shoulders or shoulder rings.

Deep groove bearings are available in many sizes, with a variety of cage types. Because of their versatility, deep groove bearings are the most widely used type of bearing.

Custom Bearings and Designs

CGB Work with Barden and other brands design engineers and customers to develop unique bearing solutions with specialised features to meet application requirements and solve functional problems. Barden’s innovations in special bearings range from nearly standard bearings with slightly modified dimensions to intricate assemblies which integrate the bearing function into a complete mechanism. In many cases, the overall cost of equipment can be reduced by incorporating special or customised bearings. Hybrid bearings (with ceramic balls) in particular save costs by improving performance. For applications such as aerospace bearings, mating components can be integrated into the bearing, for example mounting flanges, gear teeth, spring carriers and integral O ring grooves. The performance and installation benefits to be gained from using custom-designed bearings include:

• Improved assembly reliability
• Enhanced rigidity or stability of the system
• Better location control through proper bearing orientation
• Reduction in handling operations and contamination
• Improved alignment of the rotating assembly
• Weight reduction
• Improved resistance to temperature extremes
• Reduction in tolerance stack up

Bearing Closures

Bearing closures are available in two basic types – shields and seals. Both closure types are generally ordered as integral components of deep groove bearings.

Closures serve the same purposes with varying effectiveness – they exclude contamination, contain lubricants and protect the bearing from internal damage whilst being handled.

Closures are attached to the outer ring of the bearing. Seals are defined as closures which contact the inner ring, while shields clear the inner ring. Both are designed so that the stringent precision tolerances are not affected by their use.

Determining the proper closure for an application involves a trade-off, usually balancing sealing efficiency against speed capability and bearing torque. Shields do not raise bearing torque or limit speeds, but they do have low sealing efficiency. Seals are more efficient, but they may restrict operating speed and increase torque and temperature.

Another consideration in closure selection is air flow through the bearing. This is detrimental because it carries contamination into the bearing and dries out the lubricant. It is preferable to use seals if an air flow is present.

Bearing Lubrication

One major contributing factor to a bearing’s reliability is proper lubrication. Selecting the correct lubricant and maintaining it appropriately will significantly decrease the risk of premature bearing failure and running interference.

There are three main categories of bearing lubrication; oils, greases and solid dry film. Selection of the most appropriate lubricant is generally governed by the operating system and limitations of the bearing system.

Selecting the right lubricant for a specific bearing and application can:

• Reduce friction and wear by supporting the load and separating the balls from the raceways.
• Minimise cage wear.
• Prevent oxidation/corrosion of the balls.
• Act as a barrier to contaminants.
• Conduct heat away from the bearing.