National Precision Bearing is an authorized distributor for Barden bearings. Barden and FAG are part of the Schaeffler bearing group and are the nucleus of Schaeffler's Aircraft and Super Precision (ACSP) Division. NPB supports the complete Barden/FAG offer.
Barden/FAG is the pre-eminent leader in super precision ball bearing manufacturing in the world today. Barden super precision bearings excel in applications where bearings of lesser quality have failed. If superior accuracy, reliability of operation, long-life, high running speeds and low noise and vibration are requirements in your application, Barden/FAG precision bearings are the bearings of choice.
Applications for these products include Machine Tool, aircraft and medical.
Key Barden Products
Traditional Barden products are predominantly radial, single row, super precision angular contact (separable and non-separable) and deep groove ball bearings. Bearings are classified as either instrument or spindle bearings, and are made to exacting ABEC-7 or ABEC-9 specifications, standards that Barden routinely exceeds. Barden super precision bearings are used wherever the need to meet critical tolerances, high speeds and performance under demanding operating conditions are required.
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 full shoulders and the cages used in deep groove bearings make them suitable for the addition of closures. Besides single deep groove bearings with closures, Barden also offers duplex pairs with seals or shields on the outboard faces. Deep groove bearings are available in many sizes, with a variety of cage types including stainless steel. Their versatility makes them the most widely used type.
Ceramic Hybrid Bearings
Use of ceramic (silicon nitride) balls in place of steel balls can radically improve bearing performance several ways. Because ceramic balls are 60% lighter than steel balls, and because their surface finish is almost perfectly smooth, they exhibit vibration levels two to seven times lower than conventional steel ball bearings.
Because of the unique properties of silicon nitride, ceramic balls drastically reduce the predominant cause of surface wear in conventional bearings (metal rings/metal balls). In conventional bearings, microscopic surface asperities on balls and races will "cold weld" or stick together even under normal lubrication and load conditions. Since ceramic balls will not cold weld to steel rings, wear is dramatically reduced. Because wear particles generated by adhesive wear are not present in ceramic hybrids, lubricant life is also prolonged. The savings in reduced maintenance costs alone can be significant.
Even greater performance can be realized by using Cronidur® 30 Ceramic Hybrids.
Ceramic hybrids can boost running speeds by 40% to 50%. Ceramic hybrids run significantly cooler than standard steel ball bearings. Lower operating temperatures help extend lube life. Ceramic hybrids will out last steel ball bearings up to five times. Ceramic hybrids have higher rigidity characteristics Ceramic hybrids are quieter running
Barden offers both Angular Contact and Deep Groove Spindle Bearings that are made to exacting Abec 7 or Abec 9 specifications, standards that Barden routinely exceeds.
Angular Contact bearings support thrust loads or combinations of radial and thrust loads in one direction while a deep groove spindle bearing can accept radial loads thrust loads (limited) in either direction or a combination of loads.
Ball Screw Support Bearings
Series L Ball screw support bearings are specially designed for high performance machine tools, where extreme rigidity requirements preclude the use of standard angular contact bearings. The internal configuration has been designed to provide an optimum combination of high rigidity, low drag and exceptional control of lateral runout and long life. Contact angle is high at 65° to provide axial rigidity and the very high thrust capacity.
Instrument Ball Bearings
Barden offers both 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.
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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.
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