RKS.121405202001 Crossed-Roller Slewing Ring Bearing

RKS.121405202001 is a crossed-roller slewing ring. The configuration identifies Bearing Type: Standard and Series: Customized Crossed Cylindrical. 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

RKS.121405202001 identifies Type: Roller. Crossed roller geometry uses differently oriented roller contacts to react loads through a compact rotating joint. Each contact has a direction and a finite working length. Ring tilt and local deflection can move reaction toward an edge, making alignment and continuous backing important to the working geometry.

Do not evaluate a crossed-roller arrangement as if it were a ball-contact joint of the same diameter. The contact distribution, internal freedom and allowable combined duty need the correct bearing data. A mounting fit must preserve the roller relationship rather than merely hold the rings in place.

Drive Interface and Gear Geometry

RKS.121405202001 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 RKS.121405202001 identifies Inside Diameter Of Inner Ring: 14.893″, Outside Diameter Of Outer Ring: 23.226″, and Height Of Overall Bearing Assembly: 2.955″. 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.

Ring-specific geometry identifies Internal Diameter On Outer Ring: 18.754″, External Diameter On Inner Ring: 18.597″, Internal Diameter On Inner Ring: 15.13″, External Diameter On Outer Ring: 22.34″, Height Of Inner Ring: 2.285″, Height Of Outer Ring: 2.364″, and Diameter Of Bearing Raceway: 18.676″. 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

The inner-ring attachment identifies Bolt Circle In Inner Ring: 16.154″, Number Holes In Inner Ring: 36, and Size Holes In Inner Ring: 0.63″. The outer-ring attachment identifies Bolt Circle In Outer Ring: 21.276″, Number Holes In Outer Ring: 36, and Size Holes In Outer Ring: 0.63″. The two ring attachment interfaces are separate connections. Match each stated circle, quantity and hole form to its own supporting member; do not exchange inner and outer patterns because the nominal bearing size agrees.

Establish the required seating and installed running condition with the joint design. 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 RKS.121405202001 identify Basic Dynamic Load Rating(Ca): 68400 lbs and Basic Static Load Rating(C0a): 236250 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.

An overturning requirement needs the applicable moment assessment as well as the force assessment. 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.

Separate Material Roles

Material roles remain separate in RKS.121405202001. The ring-material entry is 42CRO or 50MN. These names describe their individual members, not a uniform whole-bearing material. Any alternatives joined by “or” remain alternatives; confirm the ordered member configuration rather than assuming that every listed material is fitted.

The cage-material entry is Nylon or 300 Series Stainless Steel. The seal-material entry is NBR. Cage guidance and seal material have different functions from ring contact support. Material names alone do not establish corrosion qualification, heat treatment, temperature limits or lubricant compatibility. Consider the actual operating medium and the individual member condition without assigning an unlisted environmental capability.

Lubricant Access and Handling

Lubrication and contamination control must suit the working contacts and the installed position of RKS.121405202001. Plan lubricant access through the actual assembly design; no fitting quantity or replenishment interval follows from the bearing designation. 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 64.0 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 RKS.121405202001 as a crossed-roller 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.