The Adapter Is the Part Buyers Forget to Measure
Teeth are replaced every few months; the adapter is expected to last through several sets. That is exactly why it gets ignored until a new tooth will not hold. A PC200 bucket runs one of several Komatsu-style shanks, and the catalogues sell them by strap gap rather than by machine: the tooth number stays 205-70-19570, but the shank behind it changes.
| Adapter number | Gap / lip class | Catalogue weight | Seen on |
|---|---|---|---|
| 20Y-70-14520 | 1 1/4 in (about 32 mm) lip, weld-on | 6.750 kg; 8.25 kg; 6.5 kg; 7.2 kg | PC200 / PC210 / PC220 buckets |
| 205-939-7120 | quoted as 30 / 35 / 40 mm gap | approx. 8 kg | PC200-class buckets built to other lips |
| 20Y-939-1180 | 40 mm | not published by the supplier we checked | PC200-class buckets |
| 20Y-934-2211 | 40 mm and 45 mm | 13.0–13.65 kg in supplier catalogues | listed as a PC210 tooth shank; also cross-referenced by Hitachi as 4363714PS for the ZX200-220 class |
Read that table as a warning rather than a shopping list. Several of these numbers take the same tooth, which means the tooth alone cannot tell you which shank you have. What identifies the shank is its geometry: the gap between the straps, the width at the pin line, the pin hole diameter, and the length of the nose that seats inside the tooth.
Why the Weight Numbers Wander
The same 20Y-70-14520 is quoted 6.5 kg, 6.750 kg, 7.2 kg and 8.25 kg across parts-book and dealer listings. Casting patterns differ, some catalogues weigh the bare casting and others weigh it packed, and a pattern that has been reworked once can gain a few hundred grams for good. None of these figures is a fitment claim. We publish the spread because it is what the trade actually quotes, and because a buyer who sees four figures for one number will ask better questions than one who sees a single tidy number with no source.
Fitting and Wear Notes
Weld-on adapters are only as good as the weld and the nose. Two rules from the field: check the pin line for a worn, oval hole before ordering teeth, and re-cut or rebuild the nose if the tooth rocks on it. A loose nose shears pins, and shear pins are the first symptom of a shank that should have been replaced a season earlier. Keep the tooth's side pin and snap ring on the same order as the tooth itself — the pin is common to all four profiles, so one hardware line covers a mixed box of standard, SBIC, rock chisel and tiger teeth.
FAQ
Q: Which tooth fits the Komatsu 20Y-70-14520 adapter?
A: The 205-70-19570 family — standard, SBIC, rock chisel (RC) and tiger long (TL) — all pinned with 092-44-02496. A US dealer describes this adapter as a weld-on adapter for a 1 1/4 in (about 32 mm) lip that takes the 205-70-19570 tooth.
Q: What does the 20Y-70-14520 adapter weigh?
A: The catalogues disagree, which is normal for cast GET: parts-book listings give 6.750 kg and 8.25 kg for the same number, while dealer listings for PC200-5 machines quote 6.5 kg and 7.2 kg. Use the figure for freight, not for fitment.
Q: How do I know whether I need 20Y-70-14520 or 205-939-7120?
A: Measure the gap between the straps where the tooth nose seats, plus the pin hole diameter. Supplier catalogues list 205-939-7120 as a 30 / 35 / 40 mm gap shank at about 8 kg and 20Y-939-1180 at 40 mm, so the same bucket can take more than one number. Send a photo of the worn adapter with your measurement.
Send a Photo of the Worn Adapter and the Gap Measurement
We confirm the shank number against your bucket, then quote adapters, teeth, pins and retainers on one shipment.
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