Undercarriage & wear parts
Excavator bucket teeth sizes: measuring without a catalogue
There is no universal "bucket teeth size chart". Teeth are sized by pin diameter, opening width and overall length — and those dimensions belong to a specific adapter system, not to a machine model. What follows is how to build the chart for your own machine.
Why public size charts mislead
A chart that lists "PC200: size X" is almost always describing one adapter system among several that fit that machine. If your bucket was replaced, or the machine came from a different market, the chart will be wrong for you. Use charts to narrow the search; never to confirm a part.
The three dimensions that define a tooth
- Pin / bore diameter — measured at two perpendicular axes, taking the smaller reading on a worn bore.
- Opening width — the distance between the two inner faces where the adapter seats.
- Overall length — pin centre line to tip.
Two teeth with the same pin diameter can differ in opening width. Two with the same opening width can differ in length. All three must match.
Building your own reference sheet
For each machine you maintain, record once: serial number, casting number of each tooth type in use, and the three dimensions above. Photograph the casting mark. That sheet takes an hour to build and saves a wrong order every time someone new touches the machine.
Tooth style and retention are two different things
These are frequently confused. Style describes the shape and what it is for; retention describes how the tooth is held on. Neither changes the fitment dimensions — but both must match what you already have.
Tooth style
- Standard / general purpose — broader tip, for mixed soil
- Penetration / rock chisel — narrower and heavier, for fractured rock
- Twin-tiger — two pointed tips on one body
- Flare — widened cutting edge, for trenching and wide bucket lips
- Heavy-duty abrasion — more material where the gullet wears
Style affects wear life and digging performance, not fitment.
Retention
- Pinned — side pin or vertical pin through the tooth and adapter
- Pinless / hammerless — a different locking system entirely
A pinless system will not accept a pinned tooth at all, regardless of dimensions. This is the most common surprise when changing suppliers: two teeth that measure identically can belong to incompatible retention systems.
Confirming before ordering
Send machine serial number, a photo of the casting mark, and the three dimensions to alfrun@gmail.com. We confirm the part before quoting.
Before you order
Send machine make, model, serial number and a photo of the casting mark. We confirm the part number and fitment basis before any price discussion.
Confirming the part before you order
Measurements get you close. A serial number and a photograph of the casting mark confirm it. Here is exactly what we need, and why each item matters:
Trademark notice
Machine brand names and part numbers are used only to describe fitment and application. We are not an authorised dealer of any machine manufacturer.
Reviewed by Zhonglei M&E parts desk — export trading partner for undercarriage and wear parts. Last updated 2026-11-13.