Sprockets for Combine Harvesters — Crop Processing Chain Drives
Combine harvester sprockets drive the chain mechanisms in grain headers, feeder houses, threshing systems, cleaning shoe drives, and grain elevator augers. These sprockets operate in extreme dust, heat, and crop residue conditions during peak harvest season with zero tolerance for downtime. We supply harvester sprockets in ANSI #50–#80 and ISO 10B–16B with heavy zinc plating, induction-hardened teeth, and precision bores matched to common harvester shaft sizes.
Specifications (20 Parameters)
| Parameter | Range | Custom |
|---|---|---|
| Pitch | 15.875–25.4mm | Yes |
| Chain | ANSI #50, #60, #80 / ISO 10B–16B | Yes |
| Teeth | 13–40T | 9–60T |
| Material | C45 / 4140 | — |
| Hardness | HRC 40–50 | — |
| Surface | Heavy zinc plate | Zinc-nickel, HDG |
| Hub | B-Hub keyed | TL, QD |
| Bore | H7, 20–50mm | Imperial available |
| Strand | Simplex / Duplex | — |
| Speed | Up to 1,200 RPM | — |
| Temp | -5°C to +55°C | — |
| Dust Exposure | Extreme — hardened teeth essential | — |
| Keyway | DIN 6885 / Imperial | — |
| TIR | ≤0.03mm | — |
| PD (19T #60) | 115.4mm | — |
| OD (19T #60) | 127.0mm | — |
| Max Bore (19T #60) | 35mm | — |
| Weight (19T #60) | 1.4 kg | — |
| Lubrication | Chain oil / grease | — |
| Cert | ISO 9001 | EN 10204 3.1 |
Working Principle / Advantages
Where: Header drive, feeder house chain, threshing drum, straw walker, grain elevator, tailings return. Function: Drive crop through cutting, threshing, separation, and grain transport stages simultaneously.
✅ Zinc-plated vs bare steel — survives harvest season stored outdoors without corrosion.
✅ HRC 40-50 teeth — resists abrasive crop dust and chaff. Unhardened teeth wear mid-season causing costly downtime.
✅ Precision bore — vibration-free at high RPM on threshing drum drives.
Compatibility / Selection
OEM: John Deere*, Case IH*, Claas*, New Holland*, AGCO/Massey Ferguson* harvesters.
*Compatibility reference only.
Select: ❶ OEM model → identify chain ❷ Shaft bore (metric or imperial) ❸ Tooth count ❹ Zinc plated for outdoor ❺ Order pre-season for harvest readiness.
Install / Troubleshoot
Install: Engine off → remove belt guards → release chain → swap sprocket → align → tension → lubricate → test at idle RPM.
Issues: Mid-harvest tooth wear = dust ingress (use hardened + pre-season replacement). Chain wrapping around sprocket = broken chain strand (replace immediately). Vibration = bore wear (replace sprocket).
Case Studies
Moree, NSW: “Pre-season sprocket kit for our JD S780. All 8 sprockets matched OEM specs. Harvest ran without a single chain issue.” ★★★★★
Emerald, QLD: “Zinc-plated #60 for our sorghum harvester feeder house. Survived two seasons in tropical humidity.” ★★★★★
Esperance, WA: “Bulk sprocket order for 5 harvesters. Consistent bore dimensions across the lot. Good pricing.” ★★★★☆
Horsham, VIC: “Hardened teeth on grain elevator sprocket. Previous unhardened brand wore out mid-harvest. These lasted the full season.” ★★★★★
Clare, SA: “#80 on our Claas header drive. Imperial bore machined to spec. Fitted perfectly.” ★★★★★
FAQ
Pre-season sprocket kits?
Imperial bore for older harvesters?
How often replace harvester sprockets?
Fleet pricing?
MOQ?
Harvester Chains
Tensioners
✅ ISO 9001 ✅ ANSI/ISO ✅ Zinc-plated ✅ Hardened teeth | Ever-Power: agricultural sprocket specialist.
