A slewing ring and a reducer bearing are different products
The slewing ring uses two large bolted races between the frames. A reducer bearing supports a shaft inside the swing gearbox. An order that says only“swing bearing”can therefore mean two different repair positions.
| Component | Location | Technical identity |
|---|---|---|
| Slewing ring | Between upper and lower frame | Race diameters, height, mounting holes and gear |
| Reducer bearing | Inside swing gearbox | Bearing ID/OD/width and bearingnumber |
| Pinion shaft | Reducer output | Teeth, module, spline and bearingseats |
| Complete swing reducer | Drive assembly | Motor inclusion, ratio, output and mounting |
RD118-19110 is aKX121-3slewing-ring entry
Hefei King listsRD118-19110 for theKubotaKX121-3. The machine’sfullsuffix and installedringnumber remain with the purchase. The ring’sbolt pattern, gear teeth and race dimensions distinguish the actual supplied configuration.
KX101 andKX101-3show why the generation matters
A listedRD101-19110KX101ring is640mmOD,462mmID and50mmhigh with79internal teeth. A KX101-3RG511-19110/19111ring is599mmOD,430mmID and46mmhigh with80internal teeth. These dimensions belong to their own named ringentries.
| Ring entry | OD /ID /height | Gear | Mounting |
|---|---|---|---|
| KX101 RD101-19110 | 640 /462 /50mm | 79internalteeth | 19outer /20innerM16holes |
| KX101-3 RG511-19110/19111 | 599 /430 /46mm | 80internalteeth | 17outer /16innerM16holes |
YN32W01029P1 andYN32W01030P1are reducer-bearing lines
These are spherical bearing entries in theKobelcoswing-reduction assembly. ManufacturerZHZBidentifiesGCr15bearingsteel andP0/P6/P5precision choices. The relatednumbersR25P0047D9 and25Z804D18are replacement-number entries on the reduction-parts list.
| Old number | Parts-list replacement | Position |
|---|---|---|
| YN32W01029P1 | R25P0047D9 | Spherical bearing in reducer |
| YN32W01030P1 | 25Z804D18 | Spherical bearing in reducer |
Measure the gear and mounting circles as well as diameter
Record outer/innerdiameters, totalheight, boltcounts, bolt-circle diameters andholethreads. For the gear, record internal/external teeth, tooth count, module andgearfacewidth. On a replacementreducer, addratio, pinion, spline, motorandportarrangement.
Buying questions
Is a gearbox bearing the large slewing ring?
No. The slewingringjoins theupper/lowerframes. A reducer bearing sits inside the gearbox and has its own bearingdimensions.
Does ring outside diameter fully identify the part?
It needs theinside diameter, height, mounting-holelayout andgear specification as well.
Can a similarKubotamodel use the same ring?
The KX101 andKX101-3examples have different diameters, teeth andhole counts. Keep the complete modelandringnumber together.
Can the ring and reducer parts be shipped together?
Yes. List the slewingring, reducerbearings, pinion and seals separately, with the selected assemblynumber andquantities.