Komatsu PC78MR-6 Sprocket – 21W-27-41110
OEM: 21W-27-41110 · Also written as: 21W2741110 · Updated
The Komatsu PC78MR-6 Sprocket (drive sprocket) is an aftermarket replacement listed against OEM part number 21W-27-41110. It fits PC78MR-6, PC88MR-6, PC78US-10 (8 t class). MOQ 10 pcs per part number, lead time 7–25 days.
Specifications
| Type | One-piece sprocket |
|---|---|
| Bolt holes | 14 |
Reference data from the machine maker's parts information and published parts listings for this number. We confirm it against your old part or serial number before production.
OEM Numbers and Fitment
| OEM part number | Brand | Fits |
|---|---|---|
| 21W-27-41110 | Komatsu | PC78MR-6, PC88MR-6, PC78US-10 |
What to confirm before ordering
- Tooth count
- One-piece sprocket or bolt-on segments
- Number of bolt holes and bolt circle diameter
- Chain pitch, which must match your track chain
Ordering
| Material and hardness | Confirmed for this part number on your quote |
|---|---|
| MOQ | 10 pcs per part number |
| Lead time | 7–25 days, depending on part type and quantity |
| Warranty | 12 months |
| Payment | T/T, L/C |
| Shipping port | Xiamen |
More Komatsu sprockets

Komatsu PC120-6 Sprocket
203-27-61310
Also fits: PC100-6, PC130-7

Komatsu PC200-8 Sprocket
20Y-27-11582, 20Y-27-11581
Also fits: PC200LC-8

Komatsu PC300-8 Sprocket
207-27-61210, 207-27-71460
Also fits: PC300LC-8

Komatsu PC30MR-2 Sprocket
22L-27-21110
Also fits: PC27MR-2, PC35MR-2, PC26MR-3

Komatsu PC360LC-11 Sprocket
207-27-72270
Also fits: PC350-8M0, PC270-8

Komatsu PC400-7 Sprocket
208-27-61210
Also fits: PC400-6, PC400-8, PC450-8
Full Komatsu PC78US-10 parts list →All Komatsu sprockets →All Komatsu undercarriage parts →All sprockets →