This is a direct-fit aftermarket bottom roller for the Bobcat 331 and X331 — no drilling, no grinding, bolts straight onto the undercarriage frame. It also crosses over to the 200, 300 and 400 series and the E series; the full model list is in the table below. Both OEM numbers 6815119 and 6814882 refer to the same part — we cross-check against your machine serial before anything ships. M20×2 shaft, ships from Xiamen or Guangzhou, 1-year warranty included.


| Machine Model | Bobcat 225 / X231 / 325 / X325 / X328 / 331 / X331 / X334 / X335 / X341 / 425 / 430 / E26 / E32 / E35 / E42 | Hanxi H30 |
|---|---|
| Part Type | Track Roller / Bottom Roller / Lower Roller |
| OEM Part Number | 6815119 | 6814882 |
| Install Size | M20 × 2 |
| Weight | 6 kg |
| Warranty | 1 Year |
| Compatible Brand | Bobcat | Hanxi |
| Machine Type | Mini Excavator |
| Supply Brand | ShunQi Track |
| Shipment Port | Xiamen / Guangzhou |
| Fitment Check | By machine model, OEM number, serial number, photos or dimensions |
A quick note on the two numbers: 6815119 and 6814882 are both valid for this roller — same part, same shaft, same fit. Bobcat updated the part number at some point and both stayed in circulation, so whichever one you have in your parts book is fine. The compatibility runs across the 200, 300 and 400 series and the E series — details in the table.
| OEM Number | Install Size | Compatible Models |
|---|---|---|
| 6815119 6814882 | M20×2 | 200 Series225 · X231 300 Series325 · X325 · X328 · 331 · X331 · X334 · X335 · X341 400 Series425 · 430 E SeriesE26 · E32 · E35 · E42 HanxiH30 |
Picked up two of these for a Bobcat 331 we run on a landscaping site. Bolted straight in, no fuss. Three months of daily use and the seals are still holding — honestly didn't expect that at this price point compared to going OEM.
Bobcat X331 用に2本注文しました。完全にピッタリ、取り付けもスムーズ。紛正品と比べても品質は全く問題なく、シールの状態も良好です。また飲みます。
(Ordered 2 for a Bobcat X331. Fit perfectly, went in without any trouble. Quality holds up well against OEM — seals are fine. Will order again.)
Each roller starts as a forged steel blank — not cast, not welded together. After turning, the tread goes through induction hardening to build up surface toughness where it actually contacts the track links. The floating seal faces get lapped flat before assembly, and every finished piece goes through a pressure test for oil retention. If it doesn't pass, it doesn't ship. Simple as that.

A bottom roller is a small part, but when the seal goes on a Bobcat 331 the whole machine stops — and waiting two weeks for a replacement is a real cost. We keep the 6815119 / 6814882 roller in stock and confirm fitment by OEM number or serial before the order goes through, so there are no surprises at the other end. The one-year warranty covers seal failure and tread defects; if something's wrong, send photos and we sort it out.

►Check the machine plate — confirm the exact sub-model: 331, X331, 325, X325, X328, X334, X335, X341, 225, X231, 425, 430, E26, E32, E35, E42, or Hanxi H30. The series alone isn't always enough.
►Find the part number — 6815119 or 6814882, either in your parts manual or stamped on the roller body. Both are valid.
►Measure the shaft hole — this roller is M20×2. Takes 30 seconds with a thread gauge and saves a return shipment.
►Decide on quantity — single replacement or a full set per side; both are fine, just let us know so we can pack accordingly.
►Number worn off? — happens all the time. A photo of the old roller next to the machine plate is enough for us to confirm the right part.
Each roller goes out wrapped in rust-inhibiting film inside a carton box. For bulk orders, multiple units get palletized for container loading — FCL from Xiamen or Guangzhou is typically 7–15 days to most ports, LCL around 25–35 days. If you need a single piece urgently, DHL or FedEx gets it to your door in 5–7 days.
Beyond the 331 bottom roller, we carry a full range of Bobcat mini excavator undercarriage parts — carrier rollers, front idlers, sprockets, track chains, and rubber or steel track shoes — across the complete compact excavator lineup. Browse everything in the Excavator & Bulldozer Parts catalogue.
| Series | Models |
|---|---|
| Bobcat 200 Series | 225 · X231 |
| Bobcat 300 Series | 325 · X325 · X328 · 331 · X331 · X334 · X335 · X341 |
| Bobcat 400 Series | 425 · 430 |
| Bobcat E Series | E26 · E32 · E35 · E42 |
| Hanxi | H30 |
Both 6815119 and 6814882 fit — same part, Bobcat just used two numbers over the years. It also covers the X331, 325, X325, X328, X334, X335, X341, 225, X231, 425, 430, E26, E32, E35, E42 and Hanxi H30. Shaft is M20×2, weight 6 kg.
Nothing — same dimensions, same M20×2 shaft, same fit. Send whichever number you have and we'll confirm before shipping.
No — it's an aftermarket replacement from ShunQi Track / Quanzhou Shunqi Construction Machinery Parts Co., Ltd. The Bobcat name and part numbers are referenced only to confirm fitment. We have no affiliation with Bobcat Company or Doosan Bobcat Inc.
One year from shipment — seal failure and tread defects. If something goes wrong, send photos and the machine hours logged and we'll work out a replacement or credit.
Last updated: July 3, 2026
Send us the machine model, OEM number, quantity and destination port. Fitment confirmed and quote back the same business day.
Email: sales@sq-parts.comWhatsApp: +86 185 5958 7739