Kyotechs' Alibaba store lists Slewing Bearing as a standing category, and the official catalogue groups swing components under the swing motor and gearbox lines. The term swing bearing is used on this page as the primary name, with slewing bearing carried as its synonym — both names mean the same part: the large ring gear between the undercarriage and the rotating frame, driven by the swing motor's pinion.
Documented listingDocumented Bearing Listing
| Part number | Part | Compatible with | Machine models |
|---|---|---|---|
| 140109-00048A | Slewing bearing | Doosan | DX225 |
One documented extract does not make a thin catalogue: bearings for other machines are matched by part number against the store's slewing bearing line. A bearing enquiry needs the number from the old ring or the machine's parts book, the machine model, and — if the number is gone — the bolt-hole count and pitch circle, ring diameter and gear tooth count, which together identify the ring.
Signs the Bearing Is Wearing
- Rocking play between upperstructure and undercarriage that grows over months.
- Noise or roughness at one point of the rotation — a damaged race or gear teeth.
- Grease condition: metal particles in purged grease are an early warning worth acting on.
- Pinion and ring wear together — check the swing pinion shaft (see gear parts) before fitting a new ring against a worn pinion.
Delivery and preparation times are confirmed for your order in the enquiry reply, in writing and before payment: the reply states the times, the packing and the shipping method that apply to your exact part number. Times are confirmed per order rather than published as a general figure, because they follow the listing, the quantity and the destination.
Frequently Asked Questions
Swing bearing or slewing bearing — which should I search for?
They are the same part. This site uses swing bearing as the main term and slewing bearing as its synonym; quote either and the part number decides the match.
Can a swing bearing be repaired?
Bearings are replaced rather than rebuilt in this programme. Of the components that drive the ring, the swing motor is a named component in the hydraulic repair programme and can be assessed for repair; the gearbox is supplied as a replacement assembly by part number.
Do the parts carry a warranty?
Warranty terms are confirmed in writing for each order before payment. Kyotechs' own FAQ states that most parts are backed by a warranty against manufacturing defects; ask for the term that applies to your listing when you enquire.
Measuring a Ring When the Number Is Gone
If the old ring's number cannot be read, identification falls back on dimensions, and they must be complete to be useful: outside diameter, bolt-hole count and pitch circle diameter for both bolt circles, gear tooth count and module if the teeth can be gauged, and the ring's height. Photograph the bolt pattern and the gear teeth as well. With that set, a bearing can be matched against the documented range with confidence; with half of it, any match is a guess that costs freight in both directions when it fails. Bearings are also heavy, awkward freight — one more reason the identification work happens before the order, not after the delivery.
While the ring is off, inspect what it carries. The slew drive's pinion, the ring's mounting faces on both frame and turntable, and the bolt set itself all carry evidence: stretched or corroded bolts are replaced as a set, never reused, and the mounting faces are cleaned to bare flat metal before the new ring seats. A bearing fitted onto a distorted or dirty face fails early for reasons that have nothing to do with the bearing — one more reason this category rewards method over speed.