Sprockets for Tractors — Chain-Driven Implement and PTO Systems
Tractor sprockets drive the chain mechanisms in PTO-powered implements, front-end loader chain drives, track-type tractor undercarriage systems, and auxiliary equipment chains. Australian agricultural conditions — extreme heat, red dust, crop residue, and seasonal peak loading — demand sprockets with hardened teeth, corrosion protection, and robust construction. We supply tractor sprockets in ANSI #40–#80 and ISO 08B–16B with zinc or zinc-nickel plating for outdoor durability.
Technical Specifications
| Parameter | Range | Custom |
|---|---|---|
| Pitch | 12.7–25.4mm (1/2″–1″) | Yes |
| Chain | ANSI #40, #50, #60, #80 / ISO 08B–16B | Yes |
| Teeth | 13–45T | 9–76T |
| Material | C45 / 4140 | SS304 |
| Hardness | HRC 40–50 | — |
| Surface | Zinc plated | Zinc-nickel, HDG |
| Hub | B-Hub keyed | TL, QD |
| Bore | H7, 15–50mm | To shaft spec |
| TIR | ≤0.03mm | — |
| Temp | -10°C to +60°C | — |
| Dust Protection | Sealed bearing idlers avail. | — |
| Keyway | DIN 6885 / AS 1403 | Imperial |
| Strand | Simplex / Duplex | — |
| Speed | Up to 1,000 RPM | — |
| PD (21T #60) | 127.8mm | — |
| OD (21T #60) | 139.4mm | — |
| Max Bore (21T #60) | 38mm | TL extends |
| Weight (21T #60) | 1.8 kg | — |
| Lubrication | Grease or oil | — |
| Cert | ISO 9001 | EN 10204 3.1 |
Advantages vs Inferior
✅ Zinc-plated as standard — inferior sprockets ship bare steel, rust within weeks outdoors.
✅ HRC 40-50 hardened teeth — handles dust abrasion. Unhardened teeth wear rapidly in sandy conditions.
✅ Precision bore for vibration-free PTO operation — loose bores damage tractor shafts during peak harvest.
Working Principle in Tractors
Tractor sprockets are located on PTO-driven implement shafts, front-end loader chain drives, and track-type undercarriage drive systems. The sprocket on the PTO output shaft or implement gearbox engages roller chain to drive seed drills, fertiliser spreaders, slashers, and other chain-driven attachments. In tracked tractors, the drive sprocket engages track links to propel the machine.
Key locations: PTO output, implement drive shaft, loader chain, undercarriage. Function: Transfer engine power to agricultural implements and ground drive.
Compatibility
OEM: Compatible with John Deere*, Case IH*, New Holland*, Kubota*, Massey Ferguson* tractor and implement chain drives.
*Compatibility reference only.
Selection / Install / Troubleshoot
Select: Match chain pitch → measure shaft bore → tooth count for speed → zinc for outdoor.
Install: Disengage PTO → remove implement chain → swap sprocket → align → tension → lubricate → test at low PTO speed.
Issues: Rapid wear = dust ingress (improve guarding). Chain jumping = elongated chain (replace both). Noise = dry chain (lubricate). Vibration = loose bore (check keyway fit).
Case Studies
Moree, NSW: “Zinc-plated #60 sprockets on our JD seeder. Survived two dusty seasons. No rust.” ★★★★★
Dubbo, NSW: “#50 on our feed mixer. Hardened teeth handling grain dust abrasion. Good value.” ★★★★★
Toowoomba, QLD: “Replacement sprockets for our Case IH implements. Dimensional match was perfect.” ★★★★☆
Geraldton, WA: “#80 on our front-end loader chain. 4140 steel handling the shock loads.” ★★★★★
Murray Bridge, SA: “Bulk order for our fleet. Consistent quality across 50+ sprockets.” ★★★★★
FAQ
Best surface treatment for dusty farms?
Compatible with JD/Case IH?
Imperial bore sizes?
Pre-harvest bulk order?
MOQ?
Agricultural Chains
Tensioners
✅ ISO 9001 ✅ ANSI/ISO ✅ Zinc-plated standard | Ever-Power: 15+ yrs, agricultural range, Aus delivery.
