BB15013 Four-Point Contact Ball Slewing Ring Bearing

BB15013 is a four-point contact ball slewing ring. The configuration identifies Bearing Type: Standard, Construction: Single Row, and Series: BB Series. It provides a rotating joint between supported structures. The contact arrangement, the ring mounting interfaces and the drive connection must be selected together, rather than treating the outside envelope as the complete specification.

Contact Arrangement and the Supported Joint

BB15013 identifies Type: Ball and For Load Direction: Four Point Contact. Four-point ball contact gives the joint distinct contact paths for reacting changes in load direction. Axial reaction, radial reaction and overturning effects must be assessed together; a general description of the geometry is not a permissible combined-load envelope.

Contact angle, ring deflection and the installed internal freedom affect which contacts carry reaction at a given instant. The supporting structure and bolt system therefore belong in the same assessment as the bearing ratings.

Drive Interface and Gear Geometry

BB15013 is supplied without an integral gear. Its bearing function and the means of applying rotation are separate selection questions. The drive must connect to the moving structure through the intended design; the absence of gear teeth does not identify a particular drive method or give a drive torque limit.

Check the external drive connection against the joint motion and the supporting structure. Do not treat the ungeared ring diameter as a gear pitch diameter. Bearing reaction data also cannot substitute for a drive-interface assessment, because the drive and the bearing perform different functions.

Envelope and Individual Ring Interfaces

The main envelope of BB15013 identifies Inside Diameter Of Inner Ring: 5.906″, Outside Diameter Of Outer Ring: 7.087″, and Height Of Overall Bearing Assembly: 0.512″. The inner opening, outer envelope and axial package serve different layout checks. None should be substituted for a mounting-hole circle or gear pitch diameter. Allow room for adjacent members over the full intended motion, not only in one static position.

Coordinate the individual ring interfaces with the surrounding design. Ring heights and raceway diameter have their own roles and are not interchangeable with overall assembly height or an opening diameter. Check axial overlap and radial clearance against the actual interfaces. Preserve the stated units for each dimension rather than converting a measurement-system label into a unit for another value.

Attachment Patterns and Installed Geometry

Assess the ring attachment interfaces with the supporting structures. Confirm the exact attachment design, backing and available clearance before specification. The nominal bearing envelope does not establish a fastening pattern, so the mating structures must be checked against the applicable dimensional definition.

Interface and running-condition entries are Bore Dia Tolerance: -0.00098″, Outer Dia Tolerance: -0.00098″, Width Tolerance: -0.0047″, Radial Clearance: 0.002″, Radial and Axial Runout Inner: 0.00098″, and Radial and Axial Runout Outer: 0.00098″. Tolerance, clearance and runout describe different checks. Flat backing, fastener load and structural stiffness influence installed geometry; a nominal dimension does not establish a bolt torque or an assembled preload. Confirm seating and alignment before applying normal duty.

Rating Direction and the Combined Duty

Axial entries for BB15013 identify Dynamic Thrust: 5412 lbs. The distinct radial entries identify Dynamic Radial Load: 3505 lbs. Keep dynamic and static bases separate when checking the duty. Where more than one rating notation is given, retain each notation rather than treating the values as interchangeable or assigning a new rating basis.

Moment-related entries identify Moment Load Rating: 965 ft-lbs. Joint loads must be checked with support deflection and the fastener system. Separate maximum values do not prove simultaneous capacity, fatigue life or a speed limit. Bearing reaction data must be used with the stated contact arrangement; an unrelated rating direction cannot supply a missing operating limit.

Lubricant Access and Handling

Lubrication and contamination control must suit the working contacts and the installed position of BB15013. Plan lubricant access through the actual assembly design; no fitting quantity or replenishment interval follows from the bearing designation. The seal-type entry is Open. A seal-material name is not an ingress-protection rating. Lubricant compatibility and contamination control must be assessed for the installed environment.

The stated weight is 0.61 Kg. Handling and seating should preserve the ring faces and working geometry. Use the applicable lifting and mounting procedure, without assigning lifting points or tooling from the bearing name. Mounting forces should act through the member being seated rather than across rolling contacts. After installation, check motion, alignment and lubricant access before introducing the intended load.

Putting the Joint Specification Together

Select BB15013 as a four-point contact ball slewing ring without an integral gear. The decision should connect contact geometry, the two ring interfaces, the mounting support and the applicable load case. Compare the exact attachment and drive-connection data when considering a replacement; an equal outside diameter or similar family name cannot prove interchangeability.

Before release, retain the exact designation with the ring dimensions, distinct rating bases and ordered material configuration. Verify the mating design, fastening assessment, gear mesh where present and installed running condition. These checks establish a coherent rotating-joint specification without turning general engineering function into approval for a particular machine or operating environment.